[clang] [clang-tools-extra] [clang-tidy] Add new check `modernize-use-designated-initializers` (PR #80541)
Danny Mösch via cfe-commits
cfe-commits at lists.llvm.org
Fri Feb 16 12:12:54 PST 2024
https://github.com/SimplyDanny updated https://github.com/llvm/llvm-project/pull/80541
>From 2944a0573b357843ccbefea74c462a941f4d776f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 13:13:50 +0100
Subject: [PATCH 01/50] Trigger on variable declarations
---
.../clang-tidy/modernize/CMakeLists.txt | 1 +
.../modernize/ModernizeTidyModule.cpp | 3 +
.../UseDesignatedInitializersCheck.cpp | 58 +++++++++++++++++++
.../UseDesignatedInitializersCheck.h | 33 +++++++++++
clang-tools-extra/docs/ReleaseNotes.rst | 4 ++
.../docs/clang-tidy/checks/list.rst | 1 +
.../modernize/use-designated-initializers.rst | 6 ++
.../modernize/use-designated-initializers.cpp | 32 ++++++++++
8 files changed, 138 insertions(+)
create mode 100644 clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
create mode 100644 clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
create mode 100644 clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
create mode 100644 clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
diff --git a/clang-tools-extra/clang-tidy/modernize/CMakeLists.txt b/clang-tools-extra/clang-tidy/modernize/CMakeLists.txt
index 28ca52f46943a8..6852db6c2ee311 100644
--- a/clang-tools-extra/clang-tidy/modernize/CMakeLists.txt
+++ b/clang-tools-extra/clang-tidy/modernize/CMakeLists.txt
@@ -31,6 +31,7 @@ add_clang_library(clangTidyModernizeModule
UseBoolLiteralsCheck.cpp
UseConstraintsCheck.cpp
UseDefaultMemberInitCheck.cpp
+ UseDesignatedInitializersCheck.cpp
UseEmplaceCheck.cpp
UseEqualsDefaultCheck.cpp
UseEqualsDeleteCheck.cpp
diff --git a/clang-tools-extra/clang-tidy/modernize/ModernizeTidyModule.cpp b/clang-tools-extra/clang-tidy/modernize/ModernizeTidyModule.cpp
index 654f4bd0c6ba47..e96cf274f58cfe 100644
--- a/clang-tools-extra/clang-tidy/modernize/ModernizeTidyModule.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/ModernizeTidyModule.cpp
@@ -32,6 +32,7 @@
#include "UseBoolLiteralsCheck.h"
#include "UseConstraintsCheck.h"
#include "UseDefaultMemberInitCheck.h"
+#include "UseDesignatedInitializersCheck.h"
#include "UseEmplaceCheck.h"
#include "UseEqualsDefaultCheck.h"
#include "UseEqualsDeleteCheck.h"
@@ -68,6 +69,8 @@ class ModernizeModule : public ClangTidyModule {
CheckFactories.registerCheck<MakeSharedCheck>("modernize-make-shared");
CheckFactories.registerCheck<MakeUniqueCheck>("modernize-make-unique");
CheckFactories.registerCheck<PassByValueCheck>("modernize-pass-by-value");
+ CheckFactories.registerCheck<UseDesignatedInitializersCheck>(
+ "modernize-use-designated-initializers");
CheckFactories.registerCheck<UseStartsEndsWithCheck>(
"modernize-use-starts-ends-with");
CheckFactories.registerCheck<UseStdNumbersCheck>(
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
new file mode 100644
index 00000000000000..06f0bb0dc06eac
--- /dev/null
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -0,0 +1,58 @@
+//===--- UseDesignatedInitializersCheck.cpp - clang-tidy ------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "UseDesignatedInitializersCheck.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/Stmt.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/ASTMatchers/ASTMatchers.h"
+#include <algorithm>
+#include <iterator>
+#include <vector>
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::modernize {
+
+static std::vector<Stmt *>
+getAllUndesignatedInits(const InitListExpr *SyntacticInitList) {
+ std::vector<Stmt *> Result;
+ std::copy_if(SyntacticInitList->begin(), SyntacticInitList->end(),
+ std::back_inserter(Result),
+ [](auto S) { return !isa<DesignatedInitExpr>(S); });
+ return Result;
+}
+
+void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
+ Finder->addMatcher(varDecl(allOf(has(initListExpr().bind("init")),
+ hasType(recordDecl().bind("type")))),
+ this);
+}
+
+void UseDesignatedInitializersCheck::check(
+ const MatchFinder::MatchResult &Result) {
+ const auto *InitList = Result.Nodes.getNodeAs<InitListExpr>("init");
+ const auto *Type = Result.Nodes.getNodeAs<CXXRecordDecl>("type");
+ if (!Type || !InitList || !Type->isAggregate())
+ return;
+ if (const auto *SyntacticInitList = InitList->getSyntacticForm()) {
+ const auto UndesignatedParts = getAllUndesignatedInits(SyntacticInitList);
+ if (UndesignatedParts.empty())
+ return;
+ if (UndesignatedParts.size() == SyntacticInitList->getNumInits()) {
+ diag(InitList->getLBraceLoc(), "use designated initializer list");
+ return;
+ }
+ for (const auto *InitExpr : UndesignatedParts) {
+ diag(InitExpr->getBeginLoc(), "use designated init expression");
+ }
+ }
+}
+
+} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
new file mode 100644
index 00000000000000..aeaa3f19deb7e8
--- /dev/null
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -0,0 +1,33 @@
+//===--- UseDesignatedInitializersCheck.h - clang-tidy ----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USEDESIGNATEDINITIALIZERSCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USEDESIGNATEDINITIALIZERSCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang::tidy::modernize {
+
+/// FIXME: Write a short description.
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/modernize/use-designated-initializers.html
+class UseDesignatedInitializersCheck : public ClangTidyCheck {
+public:
+ UseDesignatedInitializersCheck(StringRef Name, ClangTidyContext *Context)
+ : ClangTidyCheck(Name, Context) {}
+ void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+ void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+ std::optional<TraversalKind> getCheckTraversalKind() const override {
+ return TK_IgnoreUnlessSpelledInSource;
+ }
+};
+
+} // namespace clang::tidy::modernize
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USEDESIGNATEDINITIALIZERSCHECK_H
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 6b0c85ea84e6c6..9b257c84daa217 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -105,6 +105,10 @@ New checks
Replaces certain conditional statements with equivalent calls to
``std::min`` or ``std::max``.
+- New :doc:`modernize-use-designated-initializers
+ <clang-tidy/checks/modernize/use-designated-initializers>` check.
+
+ FIXME: add release notes.
New check aliases
^^^^^^^^^^^^^^^^^
diff --git a/clang-tools-extra/docs/clang-tidy/checks/list.rst b/clang-tools-extra/docs/clang-tidy/checks/list.rst
index 59ef69f390ee91..5e57bc0ee483fe 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/list.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/list.rst
@@ -287,6 +287,7 @@ Clang-Tidy Checks
:doc:`modernize-use-bool-literals <modernize/use-bool-literals>`, "Yes"
:doc:`modernize-use-constraints <modernize/use-constraints>`, "Yes"
:doc:`modernize-use-default-member-init <modernize/use-default-member-init>`, "Yes"
+ :doc:`modernize-use-designated-initializers <modernize/use-designated-initializers>`, "Yes"
:doc:`modernize-use-emplace <modernize/use-emplace>`, "Yes"
:doc:`modernize-use-equals-default <modernize/use-equals-default>`, "Yes"
:doc:`modernize-use-equals-delete <modernize/use-equals-delete>`, "Yes"
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
new file mode 100644
index 00000000000000..e0487f9b0e843d
--- /dev/null
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -0,0 +1,6 @@
+.. title:: clang-tidy - modernize-use-designated-initializers
+
+modernize-use-designated-initializers
+=====================================
+
+FIXME: Describe what patterns does the check detect and why. Give examples.
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
new file mode 100644
index 00000000000000..c945454201ee13
--- /dev/null
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -0,0 +1,32 @@
+// RUN: %check_clang_tidy %s modernize-use-designated-initializers %t
+
+struct S1 {};
+
+S1 s11{};
+S1 s12 = {};
+S1 s13();
+S1 s14;
+
+struct S2 { int i, j; };
+
+S2 s21{.i=1, .j =2};
+
+S2 s22 = {1, 2};
+// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+
+S2 s23{1};
+// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
+
+S2 s24{.i = 1};
+
+S2 s25 = {.i=1, 2};
+// CHECK-MESSAGES: :[[@LINE-1]]:17: warning: use designated init expression [modernize-use-designated-initializers]
+
+struct S3 {
+ S2 s2;
+ double d;
+};
+
+S3 s31 = {.s2 = 1, 2, 3.1};
+// CHECK-MESSAGES: :[[@LINE-1]]:20: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-2]]:23: warning: use designated init expression [modernize-use-designated-initializers]
>From 085623114b2b51e05985f417a6bbf7e4faa68a60 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 13:34:58 +0100
Subject: [PATCH 02/50] Support nested initializer lists
---
.../modernize/UseDesignatedInitializersCheck.cpp | 5 ++---
.../modernize/use-designated-initializers.cpp | 12 ++++++++++++
2 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 06f0bb0dc06eac..e0400db473db25 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -30,9 +30,8 @@ getAllUndesignatedInits(const InitListExpr *SyntacticInitList) {
}
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
- Finder->addMatcher(varDecl(allOf(has(initListExpr().bind("init")),
- hasType(recordDecl().bind("type")))),
- this);
+ Finder->addMatcher(
+ initListExpr(hasType(recordDecl().bind("type"))).bind("init"), this);
}
void UseDesignatedInitializersCheck::check(
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index c945454201ee13..a5eeb5553a9093 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -30,3 +30,15 @@ struct S3 {
S3 s31 = {.s2 = 1, 2, 3.1};
// CHECK-MESSAGES: :[[@LINE-1]]:20: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES: :[[@LINE-2]]:23: warning: use designated init expression [modernize-use-designated-initializers]
+
+S3 s32 = {{.i = 1, 2}};
+// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-2]]:20: warning: use designated init expression [modernize-use-designated-initializers]
+
+struct S4 {
+ double d;
+ private: static int i;
+};
+
+S4 s41 {2.2};
+// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
>From 70fe57934836d8a195b679497f693755120295d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 13:35:12 +0100
Subject: [PATCH 03/50] Rename
---
.../modernize/UseDesignatedInitializersCheck.cpp | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index e0400db473db25..7cf6dcb21ac1be 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -21,7 +21,7 @@ using namespace clang::ast_matchers;
namespace clang::tidy::modernize {
static std::vector<Stmt *>
-getAllUndesignatedInits(const InitListExpr *SyntacticInitList) {
+getUndesignatedComponents(const InitListExpr *SyntacticInitList) {
std::vector<Stmt *> Result;
std::copy_if(SyntacticInitList->begin(), SyntacticInitList->end(),
std::back_inserter(Result),
@@ -41,14 +41,15 @@ void UseDesignatedInitializersCheck::check(
if (!Type || !InitList || !Type->isAggregate())
return;
if (const auto *SyntacticInitList = InitList->getSyntacticForm()) {
- const auto UndesignatedParts = getAllUndesignatedInits(SyntacticInitList);
- if (UndesignatedParts.empty())
+ const auto UndesignatedComponents =
+ getUndesignatedComponents(SyntacticInitList);
+ if (UndesignatedComponents.empty())
return;
- if (UndesignatedParts.size() == SyntacticInitList->getNumInits()) {
+ if (UndesignatedComponents.size() == SyntacticInitList->getNumInits()) {
diag(InitList->getLBraceLoc(), "use designated initializer list");
return;
}
- for (const auto *InitExpr : UndesignatedParts) {
+ for (const auto *InitExpr : UndesignatedComponents) {
diag(InitExpr->getBeginLoc(), "use designated init expression");
}
}
>From 8b0e50a8f1251a9f6ef6391f16236459b3270dbc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 13:36:10 +0100
Subject: [PATCH 04/50] Enable for C++20 only
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.h | 3 +++
.../checkers/modernize/use-designated-initializers.cpp | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index aeaa3f19deb7e8..12a9850ada6a14 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -26,6 +26,9 @@ class UseDesignatedInitializersCheck : public ClangTidyCheck {
std::optional<TraversalKind> getCheckTraversalKind() const override {
return TK_IgnoreUnlessSpelledInSource;
}
+ bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
+ return LangOpts.CPlusPlus20;
+ }
};
} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index a5eeb5553a9093..7e41943e884061 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s modernize-use-designated-initializers %t
+// RUN: %check_clang_tidy -std=c++20 %s modernize-use-designated-initializers %t
struct S1 {};
>From 1a2a70aae4b30bb446e265936d6c03b17cdefcaf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 13:56:08 +0100
Subject: [PATCH 05/50] Add option to ignore aggregates with single elements
---
.../UseDesignatedInitializersCheck.cpp | 19 +++++++++++++++++++
.../UseDesignatedInitializersCheck.h | 9 +++++++--
.../modernize/use-designated-initializers.cpp | 5 ++++-
3 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 7cf6dcb21ac1be..d269cef13e6aaa 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -20,6 +20,10 @@ using namespace clang::ast_matchers;
namespace clang::tidy::modernize {
+static constexpr auto IgnoreSingleElementAggregatesName =
+ "IgnoreSingleElementAggregates";
+static constexpr auto IgnoreSingleElementAggregatesDefault = true;
+
static std::vector<Stmt *>
getUndesignatedComponents(const InitListExpr *SyntacticInitList) {
std::vector<Stmt *> Result;
@@ -29,6 +33,13 @@ getUndesignatedComponents(const InitListExpr *SyntacticInitList) {
return Result;
}
+UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
+ StringRef Name, ClangTidyContext *Context)
+ : ClangTidyCheck(Name, Context),
+ IgnoreSingleElementAggregates(
+ Options.getLocalOrGlobal(IgnoreSingleElementAggregatesName,
+ IgnoreSingleElementAggregatesDefault)) {}
+
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
initListExpr(hasType(recordDecl().bind("type"))).bind("init"), this);
@@ -40,6 +51,8 @@ void UseDesignatedInitializersCheck::check(
const auto *Type = Result.Nodes.getNodeAs<CXXRecordDecl>("type");
if (!Type || !InitList || !Type->isAggregate())
return;
+ if (IgnoreSingleElementAggregates && InitList->getNumInits() == 1)
+ return;
if (const auto *SyntacticInitList = InitList->getSyntacticForm()) {
const auto UndesignatedComponents =
getUndesignatedComponents(SyntacticInitList);
@@ -55,4 +68,10 @@ void UseDesignatedInitializersCheck::check(
}
}
+void UseDesignatedInitializersCheck::storeOptions(
+ ClangTidyOptions::OptionMap &Opts) {
+ Options.store(Opts, IgnoreSingleElementAggregatesName,
+ IgnoreSingleElementAggregates);
+}
+
} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index 12a9850ada6a14..8a60fd7b31c5a4 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -19,16 +19,21 @@ namespace clang::tidy::modernize {
/// http://clang.llvm.org/extra/clang-tidy/checks/modernize/use-designated-initializers.html
class UseDesignatedInitializersCheck : public ClangTidyCheck {
public:
- UseDesignatedInitializersCheck(StringRef Name, ClangTidyContext *Context)
- : ClangTidyCheck(Name, Context) {}
+ UseDesignatedInitializersCheck(StringRef Name, ClangTidyContext *Context);
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+
+private:
std::optional<TraversalKind> getCheckTraversalKind() const override {
return TK_IgnoreUnlessSpelledInSource;
}
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
return LangOpts.CPlusPlus20;
}
+ void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
+
+private:
+ bool IgnoreSingleElementAggregates;
};
} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 7e41943e884061..350ee03d581ae8 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -1,4 +1,7 @@
// RUN: %check_clang_tidy -std=c++20 %s modernize-use-designated-initializers %t
+// RUN: %check_clang_tidy -check-suffixes=,SINGLE-ELEMENT -std=c++20 %s modernize-use-designated-initializers %t \
+// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.IgnoreSingleElementAggregates, value: false}]}" \
+// RUN: --
struct S1 {};
@@ -41,4 +44,4 @@ struct S4 {
};
S4 s41 {2.2};
-// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
>From 29d9ae9c69ca2d4a982c1625643015f8e99a25cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 14:06:17 +0100
Subject: [PATCH 06/50] Test class
---
.../checkers/modernize/use-designated-initializers.cpp | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 350ee03d581ae8..d932e2d5e4863b 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -25,7 +25,8 @@ S2 s24{.i = 1};
S2 s25 = {.i=1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:17: warning: use designated init expression [modernize-use-designated-initializers]
-struct S3 {
+class S3 {
+ public:
S2 s2;
double d;
};
>From 1dd435f2aaa09d373915bb09ba55cc9e35c6070a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 14:22:56 +0100
Subject: [PATCH 07/50] Add documentation and release notes
---
.../UseDesignatedInitializersCheck.h | 3 +-
clang-tools-extra/docs/ReleaseNotes.rst | 3 +-
.../modernize/use-designated-initializers.rst | 40 ++++++++++++++++++-
3 files changed, 43 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index 8a60fd7b31c5a4..34290aba06fab1 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -13,7 +13,8 @@
namespace clang::tidy::modernize {
-/// FIXME: Write a short description.
+/// Triggers on initializer lists for aggregate type that could be
+/// written as designated initializers instead.
///
/// For the user-facing documentation see:
/// http://clang.llvm.org/extra/clang-tidy/checks/modernize/use-designated-initializers.html
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 9b257c84daa217..2bf1199a9d9878 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -108,7 +108,8 @@ New checks
- New :doc:`modernize-use-designated-initializers
<clang-tidy/checks/modernize/use-designated-initializers>` check.
- FIXME: add release notes.
+ Triggers on initializer lists for aggregate type that could be
+ written as designated initializers instead.
New check aliases
^^^^^^^^^^^^^^^^^
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index e0487f9b0e843d..1e182218dbd8eb 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -3,4 +3,42 @@
modernize-use-designated-initializers
=====================================
-FIXME: Describe what patterns does the check detect and why. Give examples.
+Triggers on initializer lists for aggregate type that could be written as
+designated initializers instead.
+
+With plain initializer lists, it is very easy to introduce bugs when adding
+new fields in the middle of a struct or class type. The same confusion might
+arise when changing the order of fields.
+
+C++ 20 supports the designated initializer syntax for aggregate types.
+By applying it, we can always be sure that aggregates are constructed correctly,
+because the every variable being initialized is referenced by name.
+
+Example:
+
+.. code-block::
+
+ struct S { int i, j; };
+
+is an aggregate type that should be initialized as
+
+.. code-block::
+
+ S s{.i = 1, .j = 2};
+
+instead of
+
+.. code-block::
+
+ S s{1, 2};
+
+which could easily become an issue when ``i`` and ``j`` are swapped in the
+declaration of ``S``.
+
+Options
+-------
+
+.. options:: IgnoreSingleElementAggregates
+
+ The value `false` specifies that even initializers for aggregate types
+ with only a single element should be checked. The default value is `true`.
>From 8b4deab0c6c358318f64e6c2bda5209b1578c208 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 14:31:30 +0100
Subject: [PATCH 08/50] Fix typo
---
.../clang-tidy/checks/modernize/use-designated-initializers.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index 1e182218dbd8eb..27474921a53d5e 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -38,7 +38,7 @@ declaration of ``S``.
Options
-------
-.. options:: IgnoreSingleElementAggregates
+.. option:: IgnoreSingleElementAggregates
The value `false` specifies that even initializers for aggregate types
with only a single element should be checked. The default value is `true`.
>From dcc603c465c4f0c3e62fca26174a96d97dc5ac81 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 17:24:32 +0100
Subject: [PATCH 09/50] Specify explicit type
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index d269cef13e6aaa..7b23a2e8a09308 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -20,9 +20,9 @@ using namespace clang::ast_matchers;
namespace clang::tidy::modernize {
-static constexpr auto IgnoreSingleElementAggregatesName =
+static const char *IgnoreSingleElementAggregatesName =
"IgnoreSingleElementAggregates";
-static constexpr auto IgnoreSingleElementAggregatesDefault = true;
+static const bool IgnoreSingleElementAggregatesDefault = true;
static std::vector<Stmt *>
getUndesignatedComponents(const InitListExpr *SyntacticInitList) {
>From 66d5528381aac7885ad98bc318c9dcde360934a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 17:24:44 +0100
Subject: [PATCH 10/50] Get only local option
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 7b23a2e8a09308..0594f3dfb10306 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -37,8 +37,8 @@ UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
StringRef Name, ClangTidyContext *Context)
: ClangTidyCheck(Name, Context),
IgnoreSingleElementAggregates(
- Options.getLocalOrGlobal(IgnoreSingleElementAggregatesName,
- IgnoreSingleElementAggregatesDefault)) {}
+ Options.get(IgnoreSingleElementAggregatesName,
+ IgnoreSingleElementAggregatesDefault)) {}
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
>From 6e1eb5b1a4ca9f23602e3a049b7b489da1dba047 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 17:25:03 +0100
Subject: [PATCH 11/50] Improve check description
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.h | 2 +-
clang-tools-extra/docs/ReleaseNotes.rst | 2 +-
.../clang-tidy/checks/modernize/use-designated-initializers.rst | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index 34290aba06fab1..de06250b0d3d06 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -13,7 +13,7 @@
namespace clang::tidy::modernize {
-/// Triggers on initializer lists for aggregate type that could be
+/// Finds initializer lists for aggregate type that could be
/// written as designated initializers instead.
///
/// For the user-facing documentation see:
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 2bf1199a9d9878..48335294de2950 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -108,7 +108,7 @@ New checks
- New :doc:`modernize-use-designated-initializers
<clang-tidy/checks/modernize/use-designated-initializers>` check.
- Triggers on initializer lists for aggregate type that could be
+ Finds initializer lists for aggregate type that could be
written as designated initializers instead.
New check aliases
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index 27474921a53d5e..0f313eec2b1990 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -3,7 +3,7 @@
modernize-use-designated-initializers
=====================================
-Triggers on initializer lists for aggregate type that could be written as
+Finds initializer lists for aggregate type that could be written as
designated initializers instead.
With plain initializer lists, it is very easy to introduce bugs when adding
>From c4c99d998a3392349baf84ae2018e5f7ae8923c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 18:25:29 +0100
Subject: [PATCH 12/50] Move logic into matcher
---
.../UseDesignatedInitializersCheck.cpp | 21 +++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 0594f3dfb10306..28567e6609fdd3 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -12,6 +12,7 @@
#include "clang/AST/Stmt.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
+#include "clang/ASTMatchers/ASTMatchersMacros.h"
#include <algorithm>
#include <iterator>
#include <vector>
@@ -40,24 +41,32 @@ UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
Options.get(IgnoreSingleElementAggregatesName,
IgnoreSingleElementAggregatesDefault)) {}
+AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
+
+AST_MATCHER(InitListExpr, isFullyDesignated) {
+ return getUndesignatedComponents(&Node).empty();
+}
+
+AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
- initListExpr(hasType(recordDecl().bind("type"))).bind("init"), this);
+ initListExpr(hasType(cxxRecordDecl(isAggregate()).bind("type")),
+ unless(IgnoreSingleElementAggregates ? hasSingleElement()
+ : unless(anything())),
+ unless(isFullyDesignated()))
+ .bind("init"),
+ this);
}
void UseDesignatedInitializersCheck::check(
const MatchFinder::MatchResult &Result) {
const auto *InitList = Result.Nodes.getNodeAs<InitListExpr>("init");
const auto *Type = Result.Nodes.getNodeAs<CXXRecordDecl>("type");
- if (!Type || !InitList || !Type->isAggregate())
- return;
- if (IgnoreSingleElementAggregates && InitList->getNumInits() == 1)
+ if (!Type || !InitList)
return;
if (const auto *SyntacticInitList = InitList->getSyntacticForm()) {
const auto UndesignatedComponents =
getUndesignatedComponents(SyntacticInitList);
- if (UndesignatedComponents.empty())
- return;
if (UndesignatedComponents.size() == SyntacticInitList->getNumInits()) {
diag(InitList->getLBraceLoc(), "use designated initializer list");
return;
>From 2179cd502cc0538512e1e2cfbc3ed351eebd806b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sat, 3 Feb 2024 18:40:45 +0100
Subject: [PATCH 13/50] Add template test
---
.../modernize/use-designated-initializers.cpp | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index d932e2d5e4863b..b6f0c3758163d6 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -46,3 +46,14 @@ struct S4 {
S4 s41 {2.2};
// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+
+S4 s42 = {{}};
+// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+
+template<typename S> S template1() { return {10, 11}; }
+
+S2 s26 = template1<S2>();
+
+template<typename S> S template2() { return {}; }
+
+S2 s27 = template2<S2>();
>From 99b760c7cacbb9f1d815c00978a115b55d57fd04 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 4 Feb 2024 11:50:12 +0100
Subject: [PATCH 14/50] Ignore types inheriting fields
---
.../modernize/UseDesignatedInitializersCheck.cpp | 15 +++++++++++----
.../modernize/use-designated-initializers.cpp | 4 ++++
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 28567e6609fdd3..62f2b59241dd70 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -48,12 +48,19 @@ AST_MATCHER(InitListExpr, isFullyDesignated) {
}
AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
+
+AST_MATCHER_FUNCTION(::internal::Matcher<CXXRecordDecl>, hasBaseWithFields) {
+ return hasAnyBase(hasType(cxxRecordDecl(has(fieldDecl()))));
+}
+
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
- initListExpr(hasType(cxxRecordDecl(isAggregate()).bind("type")),
- unless(IgnoreSingleElementAggregates ? hasSingleElement()
- : unless(anything())),
- unless(isFullyDesignated()))
+ initListExpr(
+ hasType(cxxRecordDecl(isAggregate(), unless(hasBaseWithFields()))
+ .bind("type")),
+ unless(IgnoreSingleElementAggregates ? hasSingleElement()
+ : unless(anything())),
+ unless(isFullyDesignated()))
.bind("init"),
this);
}
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index b6f0c3758163d6..0a4a098a7737be 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -57,3 +57,7 @@ S2 s26 = template1<S2>();
template<typename S> S template2() { return {}; }
S2 s27 = template2<S2>();
+
+struct S5: S2 { int x, y; };
+
+S5 s51 {1, 2, .x = 3, .y = 4};
>From 353616ffdb2e4f855d75b326a26416d64f8f2c53 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 4 Feb 2024 13:21:26 +0100
Subject: [PATCH 15/50] Ignore types with anonymous fields
---
.../UseDesignatedInitializersCheck.cpp | 12 ++++++++++-
.../modernize/use-designated-initializers.cpp | 20 +++++++++++++++++++
2 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 62f2b59241dd70..84fb59e5a76397 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -7,6 +7,7 @@
//===----------------------------------------------------------------------===//
#include "UseDesignatedInitializersCheck.h"
+#include "clang/AST/APValue.h"
#include "clang/AST/Decl.h"
#include "clang/AST/Expr.h"
#include "clang/AST/Stmt.h"
@@ -53,10 +54,19 @@ AST_MATCHER_FUNCTION(::internal::Matcher<CXXRecordDecl>, hasBaseWithFields) {
return hasAnyBase(hasType(cxxRecordDecl(has(fieldDecl()))));
}
+AST_MATCHER(FieldDecl, isAnonymousDecl) {
+ if (const auto *Record =
+ Node.getType().getCanonicalType()->getAsRecordDecl()) {
+ return Record->isAnonymousStructOrUnion() || !Record->getIdentifier();
+ }
+ return false;
+}
+
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
initListExpr(
- hasType(cxxRecordDecl(isAggregate(), unless(hasBaseWithFields()))
+ hasType(cxxRecordDecl(isAggregate(), unless(hasBaseWithFields()),
+ unless(has(fieldDecl(isAnonymousDecl()))))
.bind("type")),
unless(IgnoreSingleElementAggregates ? hasSingleElement()
: unless(anything())),
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 0a4a098a7737be..46859435c588e4 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -61,3 +61,23 @@ S2 s27 = template2<S2>();
struct S5: S2 { int x, y; };
S5 s51 {1, 2, .x = 3, .y = 4};
+
+struct S6 {
+ int i;
+ struct { int j; } s;
+};
+
+S6 s61 {1, 2};
+
+struct S7 {
+ union {
+ int k;
+ double d;
+ } u;
+};
+
+S7 s71 {1};
+
+struct S8: S7 { int i; };
+
+S8 s81{1, 2};
>From 62fac16182ec6aa72711135443752d2126ad794c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 4 Feb 2024 13:29:52 +0100
Subject: [PATCH 16/50] Remove restriction to C++ 20
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.h | 3 ---
.../checks/modernize/use-designated-initializers.rst | 6 +++++-
.../checkers/modernize/use-designated-initializers.cpp | 4 ++--
3 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index de06250b0d3d06..54dca26c6d735a 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -28,9 +28,6 @@ class UseDesignatedInitializersCheck : public ClangTidyCheck {
std::optional<TraversalKind> getCheckTraversalKind() const override {
return TK_IgnoreUnlessSpelledInSource;
}
- bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
- return LangOpts.CPlusPlus20;
- }
void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
private:
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index 0f313eec2b1990..105daf2c50ef2e 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -12,7 +12,11 @@ arise when changing the order of fields.
C++ 20 supports the designated initializer syntax for aggregate types.
By applying it, we can always be sure that aggregates are constructed correctly,
-because the every variable being initialized is referenced by name.
+because every variable being initialized is referenced by name.
+
+Even when compiling in a language version older than C++ 20, depending on you compiler,
+designated initializers are potentially supported. Therefore, the check is not restricted
+to C++ 20 and older.
Example:
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 46859435c588e4..9780bf7f0080d0 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -1,5 +1,5 @@
-// RUN: %check_clang_tidy -std=c++20 %s modernize-use-designated-initializers %t
-// RUN: %check_clang_tidy -check-suffixes=,SINGLE-ELEMENT -std=c++20 %s modernize-use-designated-initializers %t \
+// RUN: %check_clang_tidy -std=c++17 %s modernize-use-designated-initializers %t
+// RUN: %check_clang_tidy -check-suffixes=,SINGLE-ELEMENT -std=c++17 %s modernize-use-designated-initializers %t \
// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.IgnoreSingleElementAggregates, value: false}]}" \
// RUN: --
>From b00205c640514d43e50cff05b86c67cd380ba736 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 4 Feb 2024 14:05:31 +0100
Subject: [PATCH 17/50] Add option to restrict check to POD types
---
.../UseDesignatedInitializersCheck.cpp | 18 +++++++++++++-----
.../modernize/UseDesignatedInitializersCheck.h | 1 +
.../modernize/use-designated-initializers.rst | 6 ++++++
.../modernize/use-designated-initializers.cpp | 18 ++++++++++++++++++
4 files changed, 38 insertions(+), 5 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 84fb59e5a76397..b1b44289111c7a 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -26,6 +26,9 @@ static const char *IgnoreSingleElementAggregatesName =
"IgnoreSingleElementAggregates";
static const bool IgnoreSingleElementAggregatesDefault = true;
+static const char *RestrictToPODTypesName = "RestrictToPODTypes";
+static const bool RestrictToPODTypesDefault = false;
+
static std::vector<Stmt *>
getUndesignatedComponents(const InitListExpr *SyntacticInitList) {
std::vector<Stmt *> Result;
@@ -37,13 +40,16 @@ getUndesignatedComponents(const InitListExpr *SyntacticInitList) {
UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
StringRef Name, ClangTidyContext *Context)
- : ClangTidyCheck(Name, Context),
- IgnoreSingleElementAggregates(
- Options.get(IgnoreSingleElementAggregatesName,
- IgnoreSingleElementAggregatesDefault)) {}
+ : ClangTidyCheck(Name, Context), IgnoreSingleElementAggregates(Options.get(
+ IgnoreSingleElementAggregatesName,
+ IgnoreSingleElementAggregatesDefault)),
+ RestrictToPODTypes(
+ Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)) {}
AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
+AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
+
AST_MATCHER(InitListExpr, isFullyDesignated) {
return getUndesignatedComponents(&Node).empty();
}
@@ -65,7 +71,8 @@ AST_MATCHER(FieldDecl, isAnonymousDecl) {
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
initListExpr(
- hasType(cxxRecordDecl(isAggregate(), unless(hasBaseWithFields()),
+ hasType(cxxRecordDecl(RestrictToPODTypes ? isPOD() : isAggregate(),
+ unless(hasBaseWithFields()),
unless(has(fieldDecl(isAnonymousDecl()))))
.bind("type")),
unless(IgnoreSingleElementAggregates ? hasSingleElement()
@@ -98,6 +105,7 @@ void UseDesignatedInitializersCheck::storeOptions(
ClangTidyOptions::OptionMap &Opts) {
Options.store(Opts, IgnoreSingleElementAggregatesName,
IgnoreSingleElementAggregates);
+ Options.store(Opts, RestrictToPODTypesName, RestrictToPODTypes);
}
} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index 54dca26c6d735a..9aa216d30ef6b6 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -32,6 +32,7 @@ class UseDesignatedInitializersCheck : public ClangTidyCheck {
private:
bool IgnoreSingleElementAggregates;
+ bool RestrictToPODTypes;
};
} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index 105daf2c50ef2e..a306e784c33562 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -46,3 +46,9 @@ Options
The value `false` specifies that even initializers for aggregate types
with only a single element should be checked. The default value is `true`.
+
+.. option:: RestrictToPODTypes
+
+ The value `true` specifies that only Plain Old Data (POD) types shall be
+ checked. This makes the check applicable to even older C++ standards.
+ The default value is `false`.
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 9780bf7f0080d0..e0b722ec091671 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -2,6 +2,9 @@
// RUN: %check_clang_tidy -check-suffixes=,SINGLE-ELEMENT -std=c++17 %s modernize-use-designated-initializers %t \
// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.IgnoreSingleElementAggregates, value: false}]}" \
// RUN: --
+// RUN: %check_clang_tidy -check-suffixes=POD -std=c++17 %s modernize-use-designated-initializers %t \
+// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.RestrictToPODTypes, value: true}]}" \
+// RUN: --
struct S1 {};
@@ -16,14 +19,17 @@ S2 s21{.i=1, .j =2};
S2 s22 = {1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
S2 s23{1};
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-2]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
S2 s24{.i = 1};
S2 s25 = {.i=1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:17: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-2]]:17: warning: use designated init expression [modernize-use-designated-initializers]
class S3 {
public:
@@ -34,10 +40,14 @@ class S3 {
S3 s31 = {.s2 = 1, 2, 3.1};
// CHECK-MESSAGES: :[[@LINE-1]]:20: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES: :[[@LINE-2]]:23: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:20: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-4]]:23: warning: use designated init expression [modernize-use-designated-initializers]
S3 s32 = {{.i = 1, 2}};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES: :[[@LINE-2]]:20: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-4]]:20: warning: use designated init expression [modernize-use-designated-initializers]
struct S4 {
double d;
@@ -81,3 +91,11 @@ S7 s71 {1};
struct S8: S7 { int i; };
S8 s81{1, 2};
+
+struct S9 {
+ int i, j;
+ S9 &operator=(S9);
+};
+
+S9 s91{1, 2};
+// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
>From 49215d2cf27daf70a0aabe9f0cd6f0bf7efe2fbb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 11 Feb 2024 11:52:29 +0100
Subject: [PATCH 18/50] Add fix-its
---
.../modernize/UseDesignatedInitializersCheck.cpp | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index b1b44289111c7a..081286081b4cbf 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -95,8 +95,19 @@ void UseDesignatedInitializersCheck::check(
diag(InitList->getLBraceLoc(), "use designated initializer list");
return;
}
- for (const auto *InitExpr : UndesignatedComponents) {
- diag(InitExpr->getBeginLoc(), "use designated init expression");
+ const auto FieldIterator = Type->fields().begin();
+ for (const auto *InitExpr : *SyntacticInitList) {
+ const auto Field = std::next(FieldIterator);
+ if (std::find(UndesignatedComponents.begin(),
+ UndesignatedComponents.end(),
+ InitExpr) == UndesignatedComponents.end())
+ continue;
+ if (const auto *FieldID = Field->getIdentifier()) {
+ const auto FieldName = FieldID->getName();
+ diag(InitExpr->getBeginLoc(), "use designated init expression")
+ << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
+ "." + FieldName.str() + "=");
+ }
}
}
}
>From f77daebeb9b16639c485f2f9462144e6a1594a5d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 11 Feb 2024 14:36:19 +0100
Subject: [PATCH 19/50] Move computation of designated initializers to common
place
---
clang-tools-extra/clangd/InlayHints.cpp | 167 +--------------
.../clang/Tooling/DesignatedInitializers.h | 43 ++++
clang/lib/Tooling/CMakeLists.txt | 1 +
clang/lib/Tooling/DesignatedInitializers.cpp | 195 ++++++++++++++++++
4 files changed, 241 insertions(+), 165 deletions(-)
create mode 100644 clang/include/clang/Tooling/DesignatedInitializers.h
create mode 100644 clang/lib/Tooling/DesignatedInitializers.cpp
diff --git a/clang-tools-extra/clangd/InlayHints.cpp b/clang-tools-extra/clangd/InlayHints.cpp
index 671a9c30ffa959..09f5dba5697b10 100644
--- a/clang-tools-extra/clangd/InlayHints.cpp
+++ b/clang-tools-extra/clangd/InlayHints.cpp
@@ -23,8 +23,8 @@
#include "clang/Basic/Builtins.h"
#include "clang/Basic/OperatorKinds.h"
#include "clang/Basic/SourceManager.h"
+#include "clang/Tooling/DesignatedInitializers.h"
#include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/ScopeExit.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
@@ -42,169 +42,6 @@ namespace {
// For now, inlay hints are always anchored at the left or right of their range.
enum class HintSide { Left, Right };
-// Helper class to iterate over the designator names of an aggregate type.
-//
-// For an array type, yields [0], [1], [2]...
-// For aggregate classes, yields null for each base, then .field1, .field2, ...
-class AggregateDesignatorNames {
-public:
- AggregateDesignatorNames(QualType T) {
- if (!T.isNull()) {
- T = T.getCanonicalType();
- if (T->isArrayType()) {
- IsArray = true;
- Valid = true;
- return;
- }
- if (const RecordDecl *RD = T->getAsRecordDecl()) {
- Valid = true;
- FieldsIt = RD->field_begin();
- FieldsEnd = RD->field_end();
- if (const auto *CRD = llvm::dyn_cast<CXXRecordDecl>(RD)) {
- BasesIt = CRD->bases_begin();
- BasesEnd = CRD->bases_end();
- Valid = CRD->isAggregate();
- }
- OneField = Valid && BasesIt == BasesEnd && FieldsIt != FieldsEnd &&
- std::next(FieldsIt) == FieldsEnd;
- }
- }
- }
- // Returns false if the type was not an aggregate.
- operator bool() { return Valid; }
- // Advance to the next element in the aggregate.
- void next() {
- if (IsArray)
- ++Index;
- else if (BasesIt != BasesEnd)
- ++BasesIt;
- else if (FieldsIt != FieldsEnd)
- ++FieldsIt;
- }
- // Print the designator to Out.
- // Returns false if we could not produce a designator for this element.
- bool append(std::string &Out, bool ForSubobject) {
- if (IsArray) {
- Out.push_back('[');
- Out.append(std::to_string(Index));
- Out.push_back(']');
- return true;
- }
- if (BasesIt != BasesEnd)
- return false; // Bases can't be designated. Should we make one up?
- if (FieldsIt != FieldsEnd) {
- llvm::StringRef FieldName;
- if (const IdentifierInfo *II = FieldsIt->getIdentifier())
- FieldName = II->getName();
-
- // For certain objects, their subobjects may be named directly.
- if (ForSubobject &&
- (FieldsIt->isAnonymousStructOrUnion() ||
- // std::array<int,3> x = {1,2,3}. Designators not strictly valid!
- (OneField && isReservedName(FieldName))))
- return true;
-
- if (!FieldName.empty() && !isReservedName(FieldName)) {
- Out.push_back('.');
- Out.append(FieldName.begin(), FieldName.end());
- return true;
- }
- return false;
- }
- return false;
- }
-
-private:
- bool Valid = false;
- bool IsArray = false;
- bool OneField = false; // e.g. std::array { T __elements[N]; }
- unsigned Index = 0;
- CXXRecordDecl::base_class_const_iterator BasesIt;
- CXXRecordDecl::base_class_const_iterator BasesEnd;
- RecordDecl::field_iterator FieldsIt;
- RecordDecl::field_iterator FieldsEnd;
-};
-
-// Collect designator labels describing the elements of an init list.
-//
-// This function contributes the designators of some (sub)object, which is
-// represented by the semantic InitListExpr Sem.
-// This includes any nested subobjects, but *only* if they are part of the same
-// original syntactic init list (due to brace elision).
-// In other words, it may descend into subobjects but not written init-lists.
-//
-// For example: struct Outer { Inner a,b; }; struct Inner { int x, y; }
-// Outer o{{1, 2}, 3};
-// This function will be called with Sem = { {1, 2}, {3, ImplicitValue} }
-// It should generate designators '.a:' and '.b.x:'.
-// '.a:' is produced directly without recursing into the written sublist.
-// (The written sublist will have a separate collectDesignators() call later).
-// Recursion with Prefix='.b' and Sem = {3, ImplicitValue} produces '.b.x:'.
-void collectDesignators(const InitListExpr *Sem,
- llvm::DenseMap<SourceLocation, std::string> &Out,
- const llvm::DenseSet<SourceLocation> &NestedBraces,
- std::string &Prefix) {
- if (!Sem || Sem->isTransparent())
- return;
- assert(Sem->isSemanticForm());
-
- // The elements of the semantic form all correspond to direct subobjects of
- // the aggregate type. `Fields` iterates over these subobject names.
- AggregateDesignatorNames Fields(Sem->getType());
- if (!Fields)
- return;
- for (const Expr *Init : Sem->inits()) {
- auto Next = llvm::make_scope_exit([&, Size(Prefix.size())] {
- Fields.next(); // Always advance to the next subobject name.
- Prefix.resize(Size); // Erase any designator we appended.
- });
- // Skip for a broken initializer or if it is a "hole" in a subobject that
- // was not explicitly initialized.
- if (!Init || llvm::isa<ImplicitValueInitExpr>(Init))
- continue;
-
- const auto *BraceElidedSubobject = llvm::dyn_cast<InitListExpr>(Init);
- if (BraceElidedSubobject &&
- NestedBraces.contains(BraceElidedSubobject->getLBraceLoc()))
- BraceElidedSubobject = nullptr; // there were braces!
-
- if (!Fields.append(Prefix, BraceElidedSubobject != nullptr))
- continue; // no designator available for this subobject
- if (BraceElidedSubobject) {
- // If the braces were elided, this aggregate subobject is initialized
- // inline in the same syntactic list.
- // Descend into the semantic list describing the subobject.
- // (NestedBraces are still correct, they're from the same syntactic list).
- collectDesignators(BraceElidedSubobject, Out, NestedBraces, Prefix);
- continue;
- }
- Out.try_emplace(Init->getBeginLoc(), Prefix);
- }
-}
-
-// Get designators describing the elements of a (syntactic) init list.
-// This does not produce designators for any explicitly-written nested lists.
-llvm::DenseMap<SourceLocation, std::string>
-getDesignators(const InitListExpr *Syn) {
- assert(Syn->isSyntacticForm());
-
- // collectDesignators needs to know which InitListExprs in the semantic tree
- // were actually written, but InitListExpr::isExplicit() lies.
- // Instead, record where braces of sub-init-lists occur in the syntactic form.
- llvm::DenseSet<SourceLocation> NestedBraces;
- for (const Expr *Init : Syn->inits())
- if (auto *Nested = llvm::dyn_cast<InitListExpr>(Init))
- NestedBraces.insert(Nested->getLBraceLoc());
-
- // Traverse the semantic form to find the designators.
- // We use their SourceLocation to correlate with the syntactic form later.
- llvm::DenseMap<SourceLocation, std::string> Designators;
- std::string EmptyPrefix;
- collectDesignators(Syn->isSemanticForm() ? Syn : Syn->getSemanticForm(),
- Designators, NestedBraces, EmptyPrefix);
- return Designators;
-}
-
void stripLeadingUnderscores(StringRef &Name) { Name = Name.ltrim('_'); }
// getDeclForType() returns the decl responsible for Type's spelling.
@@ -854,7 +691,7 @@ class InlayHintVisitor : public RecursiveASTVisitor<InlayHintVisitor> {
if (Syn->isIdiomaticZeroInitializer(AST.getLangOpts()))
return true;
llvm::DenseMap<SourceLocation, std::string> Designators =
- getDesignators(Syn);
+ clang::tooling::getDesignators(Syn);
for (const Expr *Init : Syn->inits()) {
if (llvm::isa<DesignatedInitExpr>(Init))
continue;
diff --git a/clang/include/clang/Tooling/DesignatedInitializers.h b/clang/include/clang/Tooling/DesignatedInitializers.h
new file mode 100644
index 00000000000000..e978dfe639f0c0
--- /dev/null
+++ b/clang/include/clang/Tooling/DesignatedInitializers.h
@@ -0,0 +1,43 @@
+//===--- DesignatedInitializers.h -------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file provides utilities for designated initializers.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/Expr.h"
+#include "clang/Basic/SourceLocation.h"
+#include "llvm/ADT/DenseMap.h"
+
+namespace clang::tooling {
+
+/// Get designators describing the elements of a (syntactic) init list.
+///
+/// Given for example the type
+///
+/// struct S { int i, j; };
+///
+/// and the definition
+///
+/// S s{1, 2};
+///
+/// calling `getDesignators` for the initializer list expression `{1, 2}`
+/// would produce the map `{loc(1): ".i", loc(2): ".j"}`.
+///
+/// It does not produce designators for any explicitly-written nested lists,
+/// e.g. `{1, .j=2}` would only return `{loc(1): ".i"}`.
+///
+/// It also considers structs with fields of record types like
+/// `struct T { S s; };`. In this case, there would be designators of the
+/// form
+/// `.s.i` and `.s.j` in the returned map.
+llvm::DenseMap<clang::SourceLocation, std::string>
+getDesignators(const clang::InitListExpr *Syn);
+
+} // namespace clang::tooling
diff --git a/clang/lib/Tooling/CMakeLists.txt b/clang/lib/Tooling/CMakeLists.txt
index aff39e4de13c0b..8b0853d9150bb3 100644
--- a/clang/lib/Tooling/CMakeLists.txt
+++ b/clang/lib/Tooling/CMakeLists.txt
@@ -106,6 +106,7 @@ add_clang_library(clangTooling
ArgumentsAdjusters.cpp
CommonOptionsParser.cpp
CompilationDatabase.cpp
+ DesignatedInitializers.cpp
Execution.cpp
ExpandResponseFilesCompilationDatabase.cpp
FileMatchTrie.cpp
diff --git a/clang/lib/Tooling/DesignatedInitializers.cpp b/clang/lib/Tooling/DesignatedInitializers.cpp
new file mode 100644
index 00000000000000..8671625bd19ea3
--- /dev/null
+++ b/clang/lib/Tooling/DesignatedInitializers.cpp
@@ -0,0 +1,195 @@
+//===--- DesignatedInitializers.cpp ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file provides utilities for designated initializers.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/Tooling/DesignatedInitializers.h"
+#include "clang/AST/DeclCXX.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/ScopeExit.h"
+
+namespace clang::tooling {
+
+namespace {
+
+/// Returns true if Name is reserved, like _Foo or __Vector_base.
+static inline bool isReservedName(llvm::StringRef Name) {
+ // This doesn't catch all cases, but the most common.
+ return Name.size() >= 2 && Name[0] == '_' &&
+ (isUppercase(Name[1]) || Name[1] == '_');
+}
+
+// Helper class to iterate over the designator names of an aggregate type.
+//
+// For an array type, yields [0], [1], [2]...
+// For aggregate classes, yields null for each base, then .field1, .field2,
+// ...
+class AggregateDesignatorNames {
+public:
+ AggregateDesignatorNames(QualType T) {
+ if (!T.isNull()) {
+ T = T.getCanonicalType();
+ if (T->isArrayType()) {
+ IsArray = true;
+ Valid = true;
+ return;
+ }
+ if (const RecordDecl *RD = T->getAsRecordDecl()) {
+ Valid = true;
+ FieldsIt = RD->field_begin();
+ FieldsEnd = RD->field_end();
+ if (const auto *CRD = llvm::dyn_cast<CXXRecordDecl>(RD)) {
+ BasesIt = CRD->bases_begin();
+ BasesEnd = CRD->bases_end();
+ Valid = CRD->isAggregate();
+ }
+ OneField = Valid && BasesIt == BasesEnd && FieldsIt != FieldsEnd &&
+ std::next(FieldsIt) == FieldsEnd;
+ }
+ }
+ }
+ // Returns false if the type was not an aggregate.
+ operator bool() { return Valid; }
+ // Advance to the next element in the aggregate.
+ void next() {
+ if (IsArray)
+ ++Index;
+ else if (BasesIt != BasesEnd)
+ ++BasesIt;
+ else if (FieldsIt != FieldsEnd)
+ ++FieldsIt;
+ }
+ // Print the designator to Out.
+ // Returns false if we could not produce a designator for this element.
+ bool append(std::string &Out, bool ForSubobject) {
+ if (IsArray) {
+ Out.push_back('[');
+ Out.append(std::to_string(Index));
+ Out.push_back(']');
+ return true;
+ }
+ if (BasesIt != BasesEnd)
+ return false; // Bases can't be designated. Should we make one up?
+ if (FieldsIt != FieldsEnd) {
+ llvm::StringRef FieldName;
+ if (const IdentifierInfo *II = FieldsIt->getIdentifier())
+ FieldName = II->getName();
+
+ // For certain objects, their subobjects may be named directly.
+ if (ForSubobject &&
+ (FieldsIt->isAnonymousStructOrUnion() ||
+ // std::array<int,3> x = {1,2,3}. Designators not strictly valid!
+ (OneField && isReservedName(FieldName))))
+ return true;
+
+ if (!FieldName.empty() && !isReservedName(FieldName)) {
+ Out.push_back('.');
+ Out.append(FieldName.begin(), FieldName.end());
+ return true;
+ }
+ return false;
+ }
+ return false;
+ }
+
+private:
+ bool Valid = false;
+ bool IsArray = false;
+ bool OneField = false; // e.g. std::array { T __elements[N]; }
+ unsigned Index = 0;
+ CXXRecordDecl::base_class_const_iterator BasesIt;
+ CXXRecordDecl::base_class_const_iterator BasesEnd;
+ RecordDecl::field_iterator FieldsIt;
+ RecordDecl::field_iterator FieldsEnd;
+};
+
+// Collect designator labels describing the elements of an init list.
+//
+// This function contributes the designators of some (sub)object, which is
+// represented by the semantic InitListExpr Sem.
+// This includes any nested subobjects, but *only* if they are part of the
+// same original syntactic init list (due to brace elision). In other words,
+// it may descend into subobjects but not written init-lists.
+//
+// For example: struct Outer { Inner a,b; }; struct Inner { int x, y; }
+// Outer o{{1, 2}, 3};
+// This function will be called with Sem = { {1, 2}, {3, ImplicitValue} }
+// It should generate designators '.a:' and '.b.x:'.
+// '.a:' is produced directly without recursing into the written sublist.
+// (The written sublist will have a separate collectDesignators() call later).
+// Recursion with Prefix='.b' and Sem = {3, ImplicitValue} produces '.b.x:'.
+void collectDesignators(const InitListExpr *Sem,
+ llvm::DenseMap<SourceLocation, std::string> &Out,
+ const llvm::DenseSet<SourceLocation> &NestedBraces,
+ std::string &Prefix) {
+ if (!Sem || Sem->isTransparent())
+ return;
+ assert(Sem->isSemanticForm());
+
+ // The elements of the semantic form all correspond to direct subobjects of
+ // the aggregate type. `Fields` iterates over these subobject names.
+ AggregateDesignatorNames Fields(Sem->getType());
+ if (!Fields)
+ return;
+ for (const Expr *Init : Sem->inits()) {
+ auto Next = llvm::make_scope_exit([&, Size(Prefix.size())] {
+ Fields.next(); // Always advance to the next subobject name.
+ Prefix.resize(Size); // Erase any designator we appended.
+ });
+ // Skip for a broken initializer or if it is a "hole" in a subobject that
+ // was not explicitly initialized.
+ if (!Init || llvm::isa<ImplicitValueInitExpr>(Init))
+ continue;
+
+ const auto *BraceElidedSubobject = llvm::dyn_cast<InitListExpr>(Init);
+ if (BraceElidedSubobject &&
+ NestedBraces.contains(BraceElidedSubobject->getLBraceLoc()))
+ BraceElidedSubobject = nullptr; // there were braces!
+
+ if (!Fields.append(Prefix, BraceElidedSubobject != nullptr))
+ continue; // no designator available for this subobject
+ if (BraceElidedSubobject) {
+ // If the braces were elided, this aggregate subobject is initialized
+ // inline in the same syntactic list.
+ // Descend into the semantic list describing the subobject.
+ // (NestedBraces are still correct, they're from the same syntactic
+ // list).
+ collectDesignators(BraceElidedSubobject, Out, NestedBraces, Prefix);
+ continue;
+ }
+ Out.try_emplace(Init->getBeginLoc(), Prefix);
+ }
+}
+
+} // namespace
+
+llvm::DenseMap<SourceLocation, std::string>
+getDesignators(const InitListExpr *Syn) {
+ assert(Syn->isSyntacticForm());
+
+ // collectDesignators needs to know which InitListExprs in the semantic tree
+ // were actually written, but InitListExpr::isExplicit() lies.
+ // Instead, record where braces of sub-init-lists occur in the syntactic form.
+ llvm::DenseSet<SourceLocation> NestedBraces;
+ for (const Expr *Init : Syn->inits())
+ if (auto *Nested = llvm::dyn_cast<InitListExpr>(Init))
+ NestedBraces.insert(Nested->getLBraceLoc());
+
+ // Traverse the semantic form to find the designators.
+ // We use their SourceLocation to correlate with the syntactic form later.
+ llvm::DenseMap<SourceLocation, std::string> Designators;
+ std::string EmptyPrefix;
+ collectDesignators(Syn->isSemanticForm() ? Syn : Syn->getSemanticForm(),
+ Designators, NestedBraces, EmptyPrefix);
+ return Designators;
+}
+
+} // namespace clang::tooling
>From 6b69db248015e29fc315e8471da575d577fe4c3e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 11 Feb 2024 14:37:45 +0100
Subject: [PATCH 20/50] Fully implement fix-its reusing designated initializer
computation from Clangd
---
.../UseDesignatedInitializersCheck.cpp | 67 ++++++++++---------
.../modernize/use-designated-initializers.cpp | 8 +++
2 files changed, 44 insertions(+), 31 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 081286081b4cbf..9e90df711df66a 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -14,9 +14,9 @@
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/ASTMatchers/ASTMatchersMacros.h"
-#include <algorithm>
-#include <iterator>
-#include <vector>
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/Tooling/DesignatedInitializers.h"
using namespace clang::ast_matchers;
@@ -29,15 +29,6 @@ static const bool IgnoreSingleElementAggregatesDefault = true;
static const char *RestrictToPODTypesName = "RestrictToPODTypes";
static const bool RestrictToPODTypesDefault = false;
-static std::vector<Stmt *>
-getUndesignatedComponents(const InitListExpr *SyntacticInitList) {
- std::vector<Stmt *> Result;
- std::copy_if(SyntacticInitList->begin(), SyntacticInitList->end(),
- std::back_inserter(Result),
- [](auto S) { return !isa<DesignatedInitExpr>(S); });
- return Result;
-}
-
UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
StringRef Name, ClangTidyContext *Context)
: ClangTidyCheck(Name, Context), IgnoreSingleElementAggregates(Options.get(
@@ -51,7 +42,9 @@ AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
AST_MATCHER(InitListExpr, isFullyDesignated) {
- return getUndesignatedComponents(&Node).empty();
+ return std::all_of(Node.begin(), Node.end(), [](auto *InitExpr) {
+ return isa<DesignatedInitExpr>(InitExpr);
+ });
}
AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
@@ -82,6 +75,12 @@ void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
this);
}
+static bool isFullyUndesignated(const InitListExpr *SyntacticInitList) {
+ return std::all_of(
+ SyntacticInitList->begin(), SyntacticInitList->end(),
+ [](auto *InitExpr) { return !isa<DesignatedInitExpr>(InitExpr); });
+}
+
void UseDesignatedInitializersCheck::check(
const MatchFinder::MatchResult &Result) {
const auto *InitList = Result.Nodes.getNodeAs<InitListExpr>("init");
@@ -89,24 +88,30 @@ void UseDesignatedInitializersCheck::check(
if (!Type || !InitList)
return;
if (const auto *SyntacticInitList = InitList->getSyntacticForm()) {
- const auto UndesignatedComponents =
- getUndesignatedComponents(SyntacticInitList);
- if (UndesignatedComponents.size() == SyntacticInitList->getNumInits()) {
- diag(InitList->getLBraceLoc(), "use designated initializer list");
- return;
- }
- const auto FieldIterator = Type->fields().begin();
- for (const auto *InitExpr : *SyntacticInitList) {
- const auto Field = std::next(FieldIterator);
- if (std::find(UndesignatedComponents.begin(),
- UndesignatedComponents.end(),
- InitExpr) == UndesignatedComponents.end())
- continue;
- if (const auto *FieldID = Field->getIdentifier()) {
- const auto FieldName = FieldID->getName();
- diag(InitExpr->getBeginLoc(), "use designated init expression")
- << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
- "." + FieldName.str() + "=");
+ const llvm::DenseMap<clang::SourceLocation, std::string> Designators =
+ clang::tooling::getDesignators(SyntacticInitList);
+ if (isFullyUndesignated(SyntacticInitList)) {
+ std::string NewList = "{";
+ for (const Stmt *InitExpr : *SyntacticInitList) {
+ if (InitExpr != *SyntacticInitList->begin())
+ NewList += ", ";
+ NewList += Designators.at(InitExpr->getBeginLoc());
+ NewList += "=";
+ NewList += Lexer::getSourceText(
+ CharSourceRange::getTokenRange(InitExpr->getSourceRange()),
+ *Result.SourceManager, getLangOpts());
+ }
+ NewList += "}";
+ diag(InitList->getLBraceLoc(), "use designated initializer list")
+ << FixItHint::CreateReplacement(InitList->getSourceRange(), NewList);
+ } else {
+ for (const auto *InitExpr : *SyntacticInitList) {
+ if (!isa<DesignatedInitExpr>(InitExpr)) {
+ diag(InitExpr->getBeginLoc(), "use designated init expression")
+ << FixItHint::CreateInsertion(
+ InitExpr->getBeginLoc(),
+ Designators.at(InitExpr->getBeginLoc()) + "=");
+ }
}
}
}
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index e0b722ec091671..7d8c2ee63b4aef 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -20,16 +20,19 @@ S2 s21{.i=1, .j =2};
S2 s22 = {1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S2 s22 = {.i=1, .j=2};
S2 s23{1};
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-2]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S2 s23{.i=1};
S2 s24{.i = 1};
S2 s25 = {.i=1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:17: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-2]]:17: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-FIXES: S2 s25 = {.i=1, .j=2};
class S3 {
public:
@@ -42,12 +45,14 @@ S3 s31 = {.s2 = 1, 2, 3.1};
// CHECK-MESSAGES: :[[@LINE-2]]:23: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-3]]:20: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-4]]:23: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-FIXES: S3 s31 = {.s2 = 1, .s2.j=2, .d=3.1};
S3 s32 = {{.i = 1, 2}};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES: :[[@LINE-2]]:20: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-3]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-4]]:20: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-FIXES: S3 s32 = {.s2={.i = 1, 2}};
struct S4 {
double d;
@@ -56,9 +61,11 @@ struct S4 {
S4 s41 {2.2};
// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES-SINGLE-ELEMENT: S4 s41 {.d=2.2};
S4 s42 = {{}};
// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES-SINGLE-ELEMENT: S4 s42 = {.d={}};
template<typename S> S template1() { return {10, 11}; }
@@ -99,3 +106,4 @@ struct S9 {
S9 s91{1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S9 s91{.i=1, .j=2};
>From ad6b596457850e17b14c3a48132a34f24e3b6d6a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 11 Feb 2024 14:46:21 +0100
Subject: [PATCH 21/50] Separate by empty line
---
clang-tools-extra/docs/ReleaseNotes.rst | 1 +
1 file changed, 1 insertion(+)
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 48335294de2950..360d2f307a32dc 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -105,6 +105,7 @@ New checks
Replaces certain conditional statements with equivalent calls to
``std::min`` or ``std::max``.
+
- New :doc:`modernize-use-designated-initializers
<clang-tidy/checks/modernize/use-designated-initializers>` check.
>From 75a57cbd7d6b4925e6e852a96f7492ca0983c89a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 11 Feb 2024 15:00:18 +0100
Subject: [PATCH 22/50] Add test for default-initialized fields
---
.../checkers/modernize/use-designated-initializers.cpp | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 7d8c2ee63b4aef..5eada72e225411 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -107,3 +107,9 @@ struct S9 {
S9 s91{1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-FIXES: S9 s91{.i=1, .j=2};
+
+struct S10 { int i = 1, j = 2; };
+
+S10 s101 {1, .j=2};
+// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-FIXES: S10 s101 {.i=1, .j=2};
>From d3870eb0fb9f4a3f808f767f3799a1eea14d52d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Sun, 11 Feb 2024 17:13:37 +0100
Subject: [PATCH 23/50] Fix C++20 style
---
.../checks/modernize/use-designated-initializers.rst | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index a306e784c33562..c17aea84b73941 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -10,13 +10,13 @@ With plain initializer lists, it is very easy to introduce bugs when adding
new fields in the middle of a struct or class type. The same confusion might
arise when changing the order of fields.
-C++ 20 supports the designated initializer syntax for aggregate types.
+C++20 supports the designated initializer syntax for aggregate types.
By applying it, we can always be sure that aggregates are constructed correctly,
because every variable being initialized is referenced by name.
-Even when compiling in a language version older than C++ 20, depending on you compiler,
+Even when compiling in a language version older than C++20, depending on you compiler,
designated initializers are potentially supported. Therefore, the check is not restricted
-to C++ 20 and older.
+to C++20 and older.
Example:
>From 40940b8b7c7dbe2203ea7e175f1b47eb805f65d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Mon, 12 Feb 2024 19:24:31 +0100
Subject: [PATCH 24/50] Have custom AST matchers in anonymous namespace
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.cpp | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 9e90df711df66a..e780002b6a02ed 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -37,6 +37,8 @@ UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
RestrictToPODTypes(
Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)) {}
+namespace {
+
AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
@@ -61,6 +63,8 @@ AST_MATCHER(FieldDecl, isAnonymousDecl) {
return false;
}
+} // namespace
+
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
initListExpr(
>From 2b3d793dcf62c5d4ff7d7fa9a7689f02d8d4592b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Mon, 12 Feb 2024 19:36:39 +0100
Subject: [PATCH 25/50] Keep public methods public
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index 9aa216d30ef6b6..8c947a1027d957 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -23,12 +23,11 @@ class UseDesignatedInitializersCheck : public ClangTidyCheck {
UseDesignatedInitializersCheck(StringRef Name, ClangTidyContext *Context);
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+ void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
-private:
std::optional<TraversalKind> getCheckTraversalKind() const override {
return TK_IgnoreUnlessSpelledInSource;
}
- void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
private:
bool IgnoreSingleElementAggregates;
>From a54271862b1631f76665da536ab72da9239f9297 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Mon, 12 Feb 2024 19:43:37 +0100
Subject: [PATCH 26/50] Rename method
---
.../UseDesignatedInitializersCheck.cpp | 2 +-
clang-tools-extra/clangd/InlayHints.cpp | 5 +++--
.../clang/Tooling/DesignatedInitializers.h | 21 +++++++++----------
clang/lib/Tooling/DesignatedInitializers.cpp | 2 +-
4 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index e780002b6a02ed..84b63f8562f480 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -93,7 +93,7 @@ void UseDesignatedInitializersCheck::check(
return;
if (const auto *SyntacticInitList = InitList->getSyntacticForm()) {
const llvm::DenseMap<clang::SourceLocation, std::string> Designators =
- clang::tooling::getDesignators(SyntacticInitList);
+ clang::tooling::getUnwrittenDesignators(SyntacticInitList);
if (isFullyUndesignated(SyntacticInitList)) {
std::string NewList = "{";
for (const Stmt *InitExpr : *SyntacticInitList) {
diff --git a/clang-tools-extra/clangd/InlayHints.cpp b/clang-tools-extra/clangd/InlayHints.cpp
index 09f5dba5697b10..c8d3a94affee9d 100644
--- a/clang-tools-extra/clangd/InlayHints.cpp
+++ b/clang-tools-extra/clangd/InlayHints.cpp
@@ -684,14 +684,15 @@ class InlayHintVisitor : public RecursiveASTVisitor<InlayHintVisitor> {
// This is the one we will ultimately attach designators to.
// It may have subobject initializers inlined without braces. The *semantic*
// form of the init-list has nested init-lists for these.
- // getDesignators will look at the semantic form to determine the labels.
+ // getUnwrittenDesignators will look at the semantic form to determine the
+ // labels.
assert(Syn->isSyntacticForm() && "RAV should not visit implicit code!");
if (!Cfg.InlayHints.Designators)
return true;
if (Syn->isIdiomaticZeroInitializer(AST.getLangOpts()))
return true;
llvm::DenseMap<SourceLocation, std::string> Designators =
- clang::tooling::getDesignators(Syn);
+ clang::tooling::getUnwrittenDesignators(Syn);
for (const Expr *Init : Syn->inits()) {
if (llvm::isa<DesignatedInitExpr>(Init))
continue;
diff --git a/clang/include/clang/Tooling/DesignatedInitializers.h b/clang/include/clang/Tooling/DesignatedInitializers.h
index e978dfe639f0c0..fa1deeae0791fc 100644
--- a/clang/include/clang/Tooling/DesignatedInitializers.h
+++ b/clang/include/clang/Tooling/DesignatedInitializers.h
@@ -20,24 +20,23 @@ namespace clang::tooling {
/// Get designators describing the elements of a (syntactic) init list.
///
/// Given for example the type
-///
-/// struct S { int i, j; };
-///
+/// \code
+/// struct S { int i, j; };
+/// \endcode
/// and the definition
-///
-/// S s{1, 2};
-///
-/// calling `getDesignators` for the initializer list expression `{1, 2}`
-/// would produce the map `{loc(1): ".i", loc(2): ".j"}`.
+/// \code
+/// S s{1, 2};
+/// \endcode
+/// calling `getUnwrittenDesignators` for the initializer list expression
+/// `{1, 2}` would produce the map `{loc(1): ".i", loc(2): ".j"}`.
///
/// It does not produce designators for any explicitly-written nested lists,
/// e.g. `{1, .j=2}` would only return `{loc(1): ".i"}`.
///
/// It also considers structs with fields of record types like
/// `struct T { S s; };`. In this case, there would be designators of the
-/// form
-/// `.s.i` and `.s.j` in the returned map.
+/// form `.s.i` and `.s.j` in the returned map.
llvm::DenseMap<clang::SourceLocation, std::string>
-getDesignators(const clang::InitListExpr *Syn);
+getUnwrittenDesignators(const clang::InitListExpr *Syn);
} // namespace clang::tooling
diff --git a/clang/lib/Tooling/DesignatedInitializers.cpp b/clang/lib/Tooling/DesignatedInitializers.cpp
index 8671625bd19ea3..9d8d0a5f4795a7 100644
--- a/clang/lib/Tooling/DesignatedInitializers.cpp
+++ b/clang/lib/Tooling/DesignatedInitializers.cpp
@@ -172,7 +172,7 @@ void collectDesignators(const InitListExpr *Sem,
} // namespace
llvm::DenseMap<SourceLocation, std::string>
-getDesignators(const InitListExpr *Syn) {
+getUnwrittenDesignators(const InitListExpr *Syn) {
assert(Syn->isSyntacticForm());
// collectDesignators needs to know which InitListExprs in the semantic tree
>From 4c3ee7cc86ee6bda0f1f9d8cd4878350fd3ef4d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Mon, 12 Feb 2024 22:22:37 +0100
Subject: [PATCH 27/50] Analyze syntactic form only
---
.../modernize/UseDesignatedInitializersCheck.cpp | 8 +++++---
.../modernize/use-designated-initializers.cpp | 15 +++++++++++++++
2 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 84b63f8562f480..d4cade4a604ae2 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -44,9 +44,11 @@ AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
AST_MATCHER(InitListExpr, isFullyDesignated) {
- return std::all_of(Node.begin(), Node.end(), [](auto *InitExpr) {
- return isa<DesignatedInitExpr>(InitExpr);
- });
+ const InitListExpr *SyntacticForm =
+ Node.isSyntacticForm() ? &Node : Node.getSyntacticForm();
+ return std::all_of(
+ SyntacticForm->begin(), SyntacticForm->end(),
+ [](auto *InitExpr) { return isa<DesignatedInitExpr>(InitExpr); });
}
AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 5eada72e225411..f65afa1def9a22 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -113,3 +113,18 @@ struct S10 { int i = 1, j = 2; };
S10 s101 {1, .j=2};
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-FIXES: S10 s101 {.i=1, .j=2};
+
+struct S11 { int i; S10 s10; };
+
+S11 s111 { .i = 1 };
+S11 s112 { 1 };
+// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S11 s112 {.i=1};
+
+S11 s113 { .i=1, {}};
+// CHECK-MESSAGES: :[[@LINE-1]]:18: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-FIXES: S11 s113 { .i=1, .s10={}};
+
+S11 s114 { .i=1, .s10={1, .j=2}};
+// CHECK-MESSAGES: :[[@LINE-1]]:24: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-FIXES: S11 s114 { .i=1, .s10={.i=1, .j=2}};
>From e7afc3f77fa66294271cdec191b416c14574f69f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Tue, 13 Feb 2024 21:17:18 +0100
Subject: [PATCH 28/50] Have separate fixes
---
.../modernize/UseDesignatedInitializersCheck.cpp | 16 +++++-----------
.../modernize/use-designated-initializers.cpp | 4 ++--
2 files changed, 7 insertions(+), 13 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index d4cade4a604ae2..67327c306e2755 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -97,19 +97,13 @@ void UseDesignatedInitializersCheck::check(
const llvm::DenseMap<clang::SourceLocation, std::string> Designators =
clang::tooling::getUnwrittenDesignators(SyntacticInitList);
if (isFullyUndesignated(SyntacticInitList)) {
- std::string NewList = "{";
+ DiagnosticBuilder Diag =
+ diag(InitList->getLBraceLoc(), "use designated initializer list");
for (const Stmt *InitExpr : *SyntacticInitList) {
- if (InitExpr != *SyntacticInitList->begin())
- NewList += ", ";
- NewList += Designators.at(InitExpr->getBeginLoc());
- NewList += "=";
- NewList += Lexer::getSourceText(
- CharSourceRange::getTokenRange(InitExpr->getSourceRange()),
- *Result.SourceManager, getLangOpts());
+ Diag << FixItHint::CreateInsertion(
+ InitExpr->getBeginLoc(),
+ Designators.at(InitExpr->getBeginLoc()) + "=");
}
- NewList += "}";
- diag(InitList->getLBraceLoc(), "use designated initializer list")
- << FixItHint::CreateReplacement(InitList->getSourceRange(), NewList);
} else {
for (const auto *InitExpr : *SyntacticInitList) {
if (!isa<DesignatedInitExpr>(InitExpr)) {
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index f65afa1def9a22..a62ee1e609388e 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -52,7 +52,7 @@ S3 s32 = {{.i = 1, 2}};
// CHECK-MESSAGES: :[[@LINE-2]]:20: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-3]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-4]]:20: warning: use designated init expression [modernize-use-designated-initializers]
-// CHECK-FIXES: S3 s32 = {.s2={.i = 1, 2}};
+// CHECK-FIXES: S3 s32 = {.s2={.i = 1, .j=2}};
struct S4 {
double d;
@@ -119,7 +119,7 @@ struct S11 { int i; S10 s10; };
S11 s111 { .i = 1 };
S11 s112 { 1 };
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-FIXES: S11 s112 {.i=1};
+// CHECK-FIXES: S11 s112 { .i=1 };
S11 s113 { .i=1, {}};
// CHECK-MESSAGES: :[[@LINE-1]]:18: warning: use designated init expression [modernize-use-designated-initializers]
>From 976b26f3b448d9388b40f1c8003e932375f1f9e4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Tue, 13 Feb 2024 21:41:13 +0100
Subject: [PATCH 29/50] Keep order in release notes
---
clang-tools-extra/docs/ReleaseNotes.rst | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 360d2f307a32dc..3da6555830af1b 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -100,18 +100,18 @@ Improvements to clang-tidy
New checks
^^^^^^^^^^
+- New :doc:`modernize-use-designated-initializers
+ <clang-tidy/checks/modernize/use-designated-initializers>` check.
+
+ Finds initializer lists for aggregate types that could be
+ written as designated initializers instead.
+
- New :doc:`readability-use-std-min-max
<clang-tidy/checks/readability/use-std-min-max>` check.
Replaces certain conditional statements with equivalent calls to
``std::min`` or ``std::max``.
-- New :doc:`modernize-use-designated-initializers
- <clang-tidy/checks/modernize/use-designated-initializers>` check.
-
- Finds initializer lists for aggregate type that could be
- written as designated initializers instead.
-
New check aliases
^^^^^^^^^^^^^^^^^
>From 14c958cf9569a5a2bc6df5f9a0532855be8432c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 18:50:28 +0100
Subject: [PATCH 30/50] Use constexpr
---
.../modernize/UseDesignatedInitializersCheck.cpp | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 67327c306e2755..09233191030e57 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -22,12 +22,12 @@ using namespace clang::ast_matchers;
namespace clang::tidy::modernize {
-static const char *IgnoreSingleElementAggregatesName =
+static constexpr char IgnoreSingleElementAggregatesName[] =
"IgnoreSingleElementAggregates";
-static const bool IgnoreSingleElementAggregatesDefault = true;
+static constexpr bool IgnoreSingleElementAggregatesDefault = true;
-static const char *RestrictToPODTypesName = "RestrictToPODTypes";
-static const bool RestrictToPODTypesDefault = false;
+static constexpr char RestrictToPODTypesName[] = "RestrictToPODTypes";
+static constexpr bool RestrictToPODTypesDefault = false;
UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
StringRef Name, ClangTidyContext *Context)
>From c49861655f62712be29062626dcefb892f6fa60a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 18:51:46 +0100
Subject: [PATCH 31/50] Move after namespace
---
.../modernize/UseDesignatedInitializersCheck.cpp | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 09233191030e57..db7f1f627aad58 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -29,14 +29,6 @@ static constexpr bool IgnoreSingleElementAggregatesDefault = true;
static constexpr char RestrictToPODTypesName[] = "RestrictToPODTypes";
static constexpr bool RestrictToPODTypesDefault = false;
-UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
- StringRef Name, ClangTidyContext *Context)
- : ClangTidyCheck(Name, Context), IgnoreSingleElementAggregates(Options.get(
- IgnoreSingleElementAggregatesName,
- IgnoreSingleElementAggregatesDefault)),
- RestrictToPODTypes(
- Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)) {}
-
namespace {
AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
@@ -67,6 +59,14 @@ AST_MATCHER(FieldDecl, isAnonymousDecl) {
} // namespace
+UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
+ StringRef Name, ClangTidyContext *Context)
+ : ClangTidyCheck(Name, Context), IgnoreSingleElementAggregates(Options.get(
+ IgnoreSingleElementAggregatesName,
+ IgnoreSingleElementAggregatesDefault)),
+ RestrictToPODTypes(
+ Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)) {}
+
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
initListExpr(
>From 00d1caa16bd9dd4b5e1046239dc2c8be02486a92 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 18:54:24 +0100
Subject: [PATCH 32/50] Check for null
---
.../modernize/UseDesignatedInitializersCheck.cpp | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index db7f1f627aad58..2625a73ea28884 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -36,11 +36,13 @@ AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
AST_MATCHER(InitListExpr, isFullyDesignated) {
- const InitListExpr *SyntacticForm =
- Node.isSyntacticForm() ? &Node : Node.getSyntacticForm();
- return std::all_of(
- SyntacticForm->begin(), SyntacticForm->end(),
- [](auto *InitExpr) { return isa<DesignatedInitExpr>(InitExpr); });
+ if (const InitListExpr *SyntacticForm =
+ Node.isSyntacticForm() ? &Node : Node.getSyntacticForm()) {
+ return std::all_of(
+ SyntacticForm->begin(), SyntacticForm->end(),
+ [](auto *InitExpr) { return isa<DesignatedInitExpr>(InitExpr); });
+ }
+ return true;
}
AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
>From eb6a75b4974ff64b1c6eb27312798e870563cced Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 19:00:45 +0100
Subject: [PATCH 33/50] Use llvm::all_of
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.cpp | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 2625a73ea28884..f7c10feeea1485 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -38,9 +38,9 @@ AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
AST_MATCHER(InitListExpr, isFullyDesignated) {
if (const InitListExpr *SyntacticForm =
Node.isSyntacticForm() ? &Node : Node.getSyntacticForm()) {
- return std::all_of(
- SyntacticForm->begin(), SyntacticForm->end(),
- [](auto *InitExpr) { return isa<DesignatedInitExpr>(InitExpr); });
+ return llvm::all_of(SyntacticForm->children(), [](auto *InitExpr) {
+ return isa<DesignatedInitExpr>(InitExpr);
+ });
}
return true;
}
>From 481aff129837144d2f2505195a80dcd6e45df0d0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 19:02:44 +0100
Subject: [PATCH 34/50] Convert matcher to internal variable
---
.../modernize/UseDesignatedInitializersCheck.cpp | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index f7c10feeea1485..66c5b64c547d66 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -47,10 +47,6 @@ AST_MATCHER(InitListExpr, isFullyDesignated) {
AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
-AST_MATCHER_FUNCTION(::internal::Matcher<CXXRecordDecl>, hasBaseWithFields) {
- return hasAnyBase(hasType(cxxRecordDecl(has(fieldDecl()))));
-}
-
AST_MATCHER(FieldDecl, isAnonymousDecl) {
if (const auto *Record =
Node.getType().getCanonicalType()->getAsRecordDecl()) {
@@ -70,10 +66,12 @@ UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)) {}
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
+ const auto HasBaseWithFields =
+ hasAnyBase(hasType(cxxRecordDecl(has(fieldDecl()))));
Finder->addMatcher(
initListExpr(
hasType(cxxRecordDecl(RestrictToPODTypes ? isPOD() : isAggregate(),
- unless(hasBaseWithFields()),
+ unless(HasBaseWithFields),
unless(has(fieldDecl(isAnonymousDecl()))))
.bind("type")),
unless(IgnoreSingleElementAggregates ? hasSingleElement()
>From 37eed4708412464c2444002dc0372984a43b60cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 19:07:13 +0100
Subject: [PATCH 35/50] Check for unset type
---
.../modernize/UseDesignatedInitializersCheck.cpp | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 66c5b64c547d66..05289257c4f944 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -48,8 +48,11 @@ AST_MATCHER(InitListExpr, isFullyDesignated) {
AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
AST_MATCHER(FieldDecl, isAnonymousDecl) {
- if (const auto *Record =
- Node.getType().getCanonicalType()->getAsRecordDecl()) {
+ const auto Type = Node.getType();
+ if (Type.isNull()) {
+ return true;
+ }
+ if (const auto *Record = Type.getCanonicalType()->getAsRecordDecl()) {
return Record->isAnonymousStructOrUnion() || !Record->getIdentifier();
}
return false;
>From f0c8c4d9d0b7f0f65460089b5079c3050d8d61f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 19:36:01 +0100
Subject: [PATCH 36/50] Mention options for older standards
---
.../checks/modernize/use-designated-initializers.rst | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index c17aea84b73941..cd5e706f177a80 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -14,9 +14,12 @@ C++20 supports the designated initializer syntax for aggregate types.
By applying it, we can always be sure that aggregates are constructed correctly,
because every variable being initialized is referenced by name.
-Even when compiling in a language version older than C++20, depending on you compiler,
-designated initializers are potentially supported. Therefore, the check is not restricted
-to C++20 and older.
+Even when compiling in a language version older than C++20, depending on your
+compiler, designated initializers are potentially supported. Therefore, the
+check is not restricted to C++20 and older. Check out the options
+``-Wc99-designator`` to get support for mixed designators in
+initializer list in C and ``-Wc++20-designator`` for support of designated
+initializers in older C++ language modes.
Example:
>From e828e132a2da8477e754de79618f2d35fcc9e8d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 19:56:03 +0100
Subject: [PATCH 37/50] Add -fno-delayed-template-parsing
---
.../checkers/modernize/use-designated-initializers.cpp | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index a62ee1e609388e..05ccbd0fa2b219 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -1,10 +1,12 @@
-// RUN: %check_clang_tidy -std=c++17 %s modernize-use-designated-initializers %t
+// RUN: %check_clang_tidy -std=c++17 %s modernize-use-designated-initializers %t \
+// RUN: -- \
+// RUN: -- -fno-delayed-template-parsing
// RUN: %check_clang_tidy -check-suffixes=,SINGLE-ELEMENT -std=c++17 %s modernize-use-designated-initializers %t \
// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.IgnoreSingleElementAggregates, value: false}]}" \
-// RUN: --
+// RUN: -- -fno-delayed-template-parsing
// RUN: %check_clang_tidy -check-suffixes=POD -std=c++17 %s modernize-use-designated-initializers %t \
// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.RestrictToPODTypes, value: true}]}" \
-// RUN: --
+// RUN: -- -fno-delayed-template-parsing
struct S1 {};
>From a55e82bd828509bc122e8c3ec8be9326c07b50fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 21:13:40 +0100
Subject: [PATCH 38/50] Support inline defined structs and unions
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.cpp | 2 +-
.../checkers/modernize/use-designated-initializers.cpp | 5 +++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 05289257c4f944..7a62ac0ac10339 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -53,7 +53,7 @@ AST_MATCHER(FieldDecl, isAnonymousDecl) {
return true;
}
if (const auto *Record = Type.getCanonicalType()->getAsRecordDecl()) {
- return Record->isAnonymousStructOrUnion() || !Record->getIdentifier();
+ return Record->isAnonymousStructOrUnion();
}
return false;
}
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 05ccbd0fa2b219..be2734307a1fe8 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -87,6 +87,9 @@ struct S6 {
};
S6 s61 {1, 2};
+// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-2]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S6 s61 {.i=1, .s.j=2};
struct S7 {
union {
@@ -96,6 +99,8 @@ struct S7 {
};
S7 s71 {1};
+// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES-SINGLE-ELEMENT: S7 s71 {.u.k=1};
struct S8: S7 { int i; };
>From ba9391d7fadedee92c66ea84cccaa9d5606b0634 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 21:14:01 +0100
Subject: [PATCH 39/50] Support anonymous structs and unions
---
.../UseDesignatedInitializersCheck.cpp | 14 +----------
.../modernize/use-designated-initializers.cpp | 23 +++++++++++++++++++
2 files changed, 24 insertions(+), 13 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 7a62ac0ac10339..70c7fd43926533 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -47,17 +47,6 @@ AST_MATCHER(InitListExpr, isFullyDesignated) {
AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
-AST_MATCHER(FieldDecl, isAnonymousDecl) {
- const auto Type = Node.getType();
- if (Type.isNull()) {
- return true;
- }
- if (const auto *Record = Type.getCanonicalType()->getAsRecordDecl()) {
- return Record->isAnonymousStructOrUnion();
- }
- return false;
-}
-
} // namespace
UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
@@ -74,8 +63,7 @@ void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
initListExpr(
hasType(cxxRecordDecl(RestrictToPODTypes ? isPOD() : isAggregate(),
- unless(HasBaseWithFields),
- unless(has(fieldDecl(isAnonymousDecl()))))
+ unless(HasBaseWithFields))
.bind("type")),
unless(IgnoreSingleElementAggregates ? hasSingleElement()
: unless(anything())),
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index be2734307a1fe8..8b050ce8de5119 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -135,3 +135,26 @@ S11 s113 { .i=1, {}};
S11 s114 { .i=1, .s10={1, .j=2}};
// CHECK-MESSAGES: :[[@LINE-1]]:24: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-FIXES: S11 s114 { .i=1, .s10={.i=1, .j=2}};
+
+struct S12 {
+ int i;
+ struct { int j; };
+};
+
+S12 s121 {1, 2};
+// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S12 s121 {.i=1, .j=2};
+
+struct S13 {
+ union {
+ int k;
+ double d;
+ };
+ int i;
+};
+
+S13 s131 {1, 2};
+// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S13 s131 {.k=1, .i=2};
>From 99ca467c9ceecabf958b4bb21bc2f01517b6ad33 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 21:26:58 +0100
Subject: [PATCH 40/50] Test aggregate in aggregate
---
.../checkers/modernize/use-designated-initializers.cpp | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 8b050ce8de5119..c932784f7f5bc9 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -56,6 +56,13 @@ S3 s32 = {{.i = 1, 2}};
// CHECK-MESSAGES-POD: :[[@LINE-4]]:20: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-FIXES: S3 s32 = {.s2={.i = 1, .j=2}};
+S3 s33 = {{2}, .d=3.1};
+// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-2]]:11: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:11: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-4]]:11: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-FIXES: S3 s33 = {.s2={.i=2}, .d=3.1};
+
struct S4 {
double d;
private: static int i;
>From fb20d7df67053e2b05deb3df03047e58d1a09672 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 21:34:44 +0100
Subject: [PATCH 41/50] Add test for template values
---
.../checkers/modernize/use-designated-initializers.cpp | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index c932784f7f5bc9..159e3b05274ea4 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -165,3 +165,10 @@ S13 s131 {1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-FIXES: S13 s131 {.k=1, .i=2};
+
+#define A (3+2)
+#define B .j=1
+
+S9 s92 {A, B};
+// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-FIXES: S9 s92 {.i=A, B};
>From dce74ea5fd955c416f45b46f6d6a0e970b80d58d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 22:02:44 +0100
Subject: [PATCH 42/50] Add option to ignore macros
---
.../UseDesignatedInitializersCheck.cpp | 30 +++++++++++++------
.../UseDesignatedInitializersCheck.h | 1 +
.../modernize/use-designated-initializers.rst | 5 ++++
.../modernize/use-designated-initializers.cpp | 11 +++++--
4 files changed, 36 insertions(+), 11 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 70c7fd43926533..45774a7095b485 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -29,6 +29,9 @@ static constexpr bool IgnoreSingleElementAggregatesDefault = true;
static constexpr char RestrictToPODTypesName[] = "RestrictToPODTypes";
static constexpr bool RestrictToPODTypesDefault = false;
+static constexpr char IgnoreMacrosName[] = "IgnoreMacros";
+static constexpr bool IgnoreMacrosDefault = true;
+
namespace {
AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
@@ -55,7 +58,8 @@ UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
IgnoreSingleElementAggregatesName,
IgnoreSingleElementAggregatesDefault)),
RestrictToPODTypes(
- Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)) {}
+ Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)),
+ IgnoreMacros(Options.get(IgnoreMacrosName, IgnoreMacrosDefault)) {}
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
const auto HasBaseWithFields =
@@ -88,6 +92,9 @@ void UseDesignatedInitializersCheck::check(
const llvm::DenseMap<clang::SourceLocation, std::string> Designators =
clang::tooling::getUnwrittenDesignators(SyntacticInitList);
if (isFullyUndesignated(SyntacticInitList)) {
+ if (IgnoreMacros && InitList->getBeginLoc().isMacroID()) {
+ return;
+ }
DiagnosticBuilder Diag =
diag(InitList->getLBraceLoc(), "use designated initializer list");
for (const Stmt *InitExpr : *SyntacticInitList) {
@@ -95,15 +102,19 @@ void UseDesignatedInitializersCheck::check(
InitExpr->getBeginLoc(),
Designators.at(InitExpr->getBeginLoc()) + "=");
}
- } else {
- for (const auto *InitExpr : *SyntacticInitList) {
- if (!isa<DesignatedInitExpr>(InitExpr)) {
- diag(InitExpr->getBeginLoc(), "use designated init expression")
- << FixItHint::CreateInsertion(
- InitExpr->getBeginLoc(),
- Designators.at(InitExpr->getBeginLoc()) + "=");
- }
+ return;
+ }
+ for (const auto *InitExpr : *SyntacticInitList) {
+ if (isa<DesignatedInitExpr>(InitExpr)) {
+ continue;
+ }
+ if (IgnoreMacros && InitExpr->getBeginLoc().isMacroID()) {
+ continue;
}
+ diag(InitExpr->getBeginLoc(), "use designated init expression")
+ << FixItHint::CreateInsertion(
+ InitExpr->getBeginLoc(),
+ Designators.at(InitExpr->getBeginLoc()) + "=");
}
}
}
@@ -113,6 +124,7 @@ void UseDesignatedInitializersCheck::storeOptions(
Options.store(Opts, IgnoreSingleElementAggregatesName,
IgnoreSingleElementAggregates);
Options.store(Opts, RestrictToPODTypesName, RestrictToPODTypes);
+ Options.store(Opts, IgnoreMacrosName, IgnoreMacros);
}
} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
index 8c947a1027d957..0a496f51b95762 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.h
@@ -32,6 +32,7 @@ class UseDesignatedInitializersCheck : public ClangTidyCheck {
private:
bool IgnoreSingleElementAggregates;
bool RestrictToPODTypes;
+ bool IgnoreMacros;
};
} // namespace clang::tidy::modernize
diff --git a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
index cd5e706f177a80..4bb2406f792a45 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/modernize/use-designated-initializers.rst
@@ -45,6 +45,11 @@ declaration of ``S``.
Options
-------
+.. option:: IgnoreMacros
+
+ The value `false` specifies that components of initializer lists expanded
+ from macros are not checked. The default value is `true`.
+
.. option:: IgnoreSingleElementAggregates
The value `false` specifies that even initializers for aggregate types
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 159e3b05274ea4..fbc659f086ad57 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -7,6 +7,9 @@
// RUN: %check_clang_tidy -check-suffixes=POD -std=c++17 %s modernize-use-designated-initializers %t \
// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.RestrictToPODTypes, value: true}]}" \
// RUN: -- -fno-delayed-template-parsing
+// RUN: %check_clang_tidy -check-suffixes=,MACROS -std=c++17 %s modernize-use-designated-initializers %t \
+// RUN: -- -config="{CheckOptions: [{key: modernize-use-designated-initializers.IgnoreMacros, value: false}]}" \
+// RUN: -- -fno-delayed-template-parsing
struct S1 {};
@@ -170,5 +173,9 @@ S13 s131 {1, 2};
#define B .j=1
S9 s92 {A, B};
-// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use designated init expression [modernize-use-designated-initializers]
-// CHECK-FIXES: S9 s92 {.i=A, B};
+// CHECK-MESSAGES-MACROS: :[[@LINE-1]]:9: warning: use designated init expression [modernize-use-designated-initializers]
+
+#define DECLARE_S93 S9 s93 {1, 2}
+
+DECLARE_S93;
+// CHECK-MESSAGES-MACROS: :[[@LINE-1]]:1: warning: use designated initializer list [modernize-use-designated-initializers]
>From cc81c2cfe47db2a1ecefd8aa46f7e1ca10be223b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Wed, 14 Feb 2024 22:33:30 +0100
Subject: [PATCH 43/50] Stream full source ranges into diagnostics
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 45774a7095b485..71fae40f0dc600 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -97,6 +97,7 @@ void UseDesignatedInitializersCheck::check(
}
DiagnosticBuilder Diag =
diag(InitList->getLBraceLoc(), "use designated initializer list");
+ Diag << InitList->getSourceRange();
for (const Stmt *InitExpr : *SyntacticInitList) {
Diag << FixItHint::CreateInsertion(
InitExpr->getBeginLoc(),
@@ -112,6 +113,7 @@ void UseDesignatedInitializersCheck::check(
continue;
}
diag(InitExpr->getBeginLoc(), "use designated init expression")
+ << InitExpr->getSourceRange()
<< FixItHint::CreateInsertion(
InitExpr->getBeginLoc(),
Designators.at(InitExpr->getBeginLoc()) + "=");
>From ef5259ac4e5366f74d8ba0690c05877384f6acd8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Thu, 15 Feb 2024 20:44:03 +0100
Subject: [PATCH 44/50] Use getLocalOrGlobal for IgnoreMacros option
---
.../clang-tidy/modernize/UseDesignatedInitializersCheck.cpp | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 71fae40f0dc600..e4b153fcc4cbf4 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -59,7 +59,8 @@ UseDesignatedInitializersCheck::UseDesignatedInitializersCheck(
IgnoreSingleElementAggregatesDefault)),
RestrictToPODTypes(
Options.get(RestrictToPODTypesName, RestrictToPODTypesDefault)),
- IgnoreMacros(Options.get(IgnoreMacrosName, IgnoreMacrosDefault)) {}
+ IgnoreMacros(
+ Options.getLocalOrGlobal(IgnoreMacrosName, IgnoreMacrosDefault)) {}
void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
const auto HasBaseWithFields =
>From e91c642673efebe7f9fd1da5a4e25509891f7527 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Thu, 15 Feb 2024 20:44:18 +0100
Subject: [PATCH 45/50] Avoid negation
---
.../modernize/UseDesignatedInitializersCheck.cpp | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index e4b153fcc4cbf4..3f2ee1abc8582b 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -48,7 +48,9 @@ AST_MATCHER(InitListExpr, isFullyDesignated) {
return true;
}
-AST_MATCHER(InitListExpr, hasSingleElement) { return Node.getNumInits() == 1; }
+AST_MATCHER(InitListExpr, hasMoreThanOneElement) {
+ return Node.getNumInits() > 1;
+}
} // namespace
@@ -70,8 +72,7 @@ void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
hasType(cxxRecordDecl(RestrictToPODTypes ? isPOD() : isAggregate(),
unless(HasBaseWithFields))
.bind("type")),
- unless(IgnoreSingleElementAggregates ? hasSingleElement()
- : unless(anything())),
+ IgnoreSingleElementAggregates ? hasMoreThanOneElement() : anything(),
unless(isFullyDesignated()))
.bind("init"),
this);
>From 9948284ee7ea9f3888de5056aef6d0cd039169b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Thu, 15 Feb 2024 20:44:35 +0100
Subject: [PATCH 46/50] Use llvm::all_of
---
.../modernize/UseDesignatedInitializersCheck.cpp | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 3f2ee1abc8582b..273c0ab127f33f 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -41,7 +41,7 @@ AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
AST_MATCHER(InitListExpr, isFullyDesignated) {
if (const InitListExpr *SyntacticForm =
Node.isSyntacticForm() ? &Node : Node.getSyntacticForm()) {
- return llvm::all_of(SyntacticForm->children(), [](auto *InitExpr) {
+ return llvm::all_of(*SyntacticForm, [](auto *InitExpr) {
return isa<DesignatedInitExpr>(InitExpr);
});
}
@@ -79,9 +79,9 @@ void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
}
static bool isFullyUndesignated(const InitListExpr *SyntacticInitList) {
- return std::all_of(
- SyntacticInitList->begin(), SyntacticInitList->end(),
- [](auto *InitExpr) { return !isa<DesignatedInitExpr>(InitExpr); });
+ return llvm::all_of(*SyntacticInitList, [](auto *InitExpr) {
+ return !isa<DesignatedInitExpr>(InitExpr);
+ });
}
void UseDesignatedInitializersCheck::check(
>From d98217095ed935bb82e0d4327efc60f3e7d7e9dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Thu, 15 Feb 2024 20:48:25 +0100
Subject: [PATCH 47/50] Reduce nesting level
---
.../UseDesignatedInitializersCheck.cpp | 59 ++++++++++---------
1 file changed, 31 insertions(+), 28 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 273c0ab127f33f..060907e0e07cc9 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -88,38 +88,41 @@ void UseDesignatedInitializersCheck::check(
const MatchFinder::MatchResult &Result) {
const auto *InitList = Result.Nodes.getNodeAs<InitListExpr>("init");
const auto *Type = Result.Nodes.getNodeAs<CXXRecordDecl>("type");
- if (!Type || !InitList)
+ if (!Type || !InitList) {
return;
- if (const auto *SyntacticInitList = InitList->getSyntacticForm()) {
- const llvm::DenseMap<clang::SourceLocation, std::string> Designators =
- clang::tooling::getUnwrittenDesignators(SyntacticInitList);
- if (isFullyUndesignated(SyntacticInitList)) {
- if (IgnoreMacros && InitList->getBeginLoc().isMacroID()) {
- return;
- }
- DiagnosticBuilder Diag =
- diag(InitList->getLBraceLoc(), "use designated initializer list");
- Diag << InitList->getSourceRange();
- for (const Stmt *InitExpr : *SyntacticInitList) {
- Diag << FixItHint::CreateInsertion(
- InitExpr->getBeginLoc(),
- Designators.at(InitExpr->getBeginLoc()) + "=");
- }
+ }
+ const auto *SyntacticInitList = InitList->getSyntacticForm();
+ if (!SyntacticInitList) {
+ return;
+ }
+ const llvm::DenseMap<clang::SourceLocation, std::string> Designators =
+ clang::tooling::getUnwrittenDesignators(SyntacticInitList);
+ if (isFullyUndesignated(SyntacticInitList)) {
+ if (IgnoreMacros && InitList->getBeginLoc().isMacroID()) {
return;
}
- for (const auto *InitExpr : *SyntacticInitList) {
- if (isa<DesignatedInitExpr>(InitExpr)) {
- continue;
- }
- if (IgnoreMacros && InitExpr->getBeginLoc().isMacroID()) {
- continue;
- }
- diag(InitExpr->getBeginLoc(), "use designated init expression")
- << InitExpr->getSourceRange()
- << FixItHint::CreateInsertion(
- InitExpr->getBeginLoc(),
- Designators.at(InitExpr->getBeginLoc()) + "=");
+ DiagnosticBuilder Diag =
+ diag(InitList->getLBraceLoc(), "use designated initializer list");
+ Diag << InitList->getSourceRange();
+ for (const Stmt *InitExpr : *SyntacticInitList) {
+ Diag << FixItHint::CreateInsertion(
+ InitExpr->getBeginLoc(),
+ Designators.at(InitExpr->getBeginLoc()) + "=");
+ }
+ return;
+ }
+ for (const auto *InitExpr : *SyntacticInitList) {
+ if (isa<DesignatedInitExpr>(InitExpr)) {
+ continue;
+ }
+ if (IgnoreMacros && InitExpr->getBeginLoc().isMacroID()) {
+ continue;
}
+ diag(InitExpr->getBeginLoc(), "use designated init expression")
+ << InitExpr->getSourceRange()
+ << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
+ Designators.at(InitExpr->getBeginLoc()) +
+ "=");
}
}
>From 4b900334391168f11946211124334df974de362f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Thu, 15 Feb 2024 21:52:35 +0100
Subject: [PATCH 48/50] Compute designators lazily and exit/continue early
---
.../UseDesignatedInitializersCheck.cpp | 56 ++++++++++++-------
1 file changed, 36 insertions(+), 20 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 060907e0e07cc9..8daa6e873443f7 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -34,6 +34,12 @@ static constexpr bool IgnoreMacrosDefault = true;
namespace {
+unsigned getNumberOfDesignated(const InitListExpr *SyntacticInitList) {
+ return llvm::count_if(*SyntacticInitList, [](auto *InitExpr) {
+ return isa<DesignatedInitExpr>(InitExpr);
+ });
+}
+
AST_MATCHER(CXXRecordDecl, isAggregate) { return Node.isAggregate(); }
AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
@@ -41,9 +47,7 @@ AST_MATCHER(CXXRecordDecl, isPOD) { return Node.isPOD(); }
AST_MATCHER(InitListExpr, isFullyDesignated) {
if (const InitListExpr *SyntacticForm =
Node.isSyntacticForm() ? &Node : Node.getSyntacticForm()) {
- return llvm::all_of(*SyntacticForm, [](auto *InitExpr) {
- return isa<DesignatedInitExpr>(InitExpr);
- });
+ return getNumberOfDesignated(SyntacticForm) == SyntacticForm->getNumInits();
}
return true;
}
@@ -78,12 +82,6 @@ void UseDesignatedInitializersCheck::registerMatchers(MatchFinder *Finder) {
this);
}
-static bool isFullyUndesignated(const InitListExpr *SyntacticInitList) {
- return llvm::all_of(*SyntacticInitList, [](auto *InitExpr) {
- return !isa<DesignatedInitExpr>(InitExpr);
- });
-}
-
void UseDesignatedInitializersCheck::check(
const MatchFinder::MatchResult &Result) {
const auto *InitList = Result.Nodes.getNodeAs<InitListExpr>("init");
@@ -95,19 +93,33 @@ void UseDesignatedInitializersCheck::check(
if (!SyntacticInitList) {
return;
}
- const llvm::DenseMap<clang::SourceLocation, std::string> Designators =
- clang::tooling::getUnwrittenDesignators(SyntacticInitList);
- if (isFullyUndesignated(SyntacticInitList)) {
+ std::optional<llvm::DenseMap<clang::SourceLocation, std::string>>
+ Designators{};
+ const auto LazyDesignators = [SyntacticInitList, &Designators] {
+ return Designators
+ ? Designators
+ : Designators.emplace(clang::tooling::getUnwrittenDesignators(
+ SyntacticInitList));
+ };
+ const unsigned NumberOfDesignated = getNumberOfDesignated(SyntacticInitList);
+ if (0 == NumberOfDesignated) {
if (IgnoreMacros && InitList->getBeginLoc().isMacroID()) {
return;
}
+ if (SyntacticInitList->getNumInits() - NumberOfDesignated >
+ LazyDesignators()->size()) {
+ return;
+ }
DiagnosticBuilder Diag =
diag(InitList->getLBraceLoc(), "use designated initializer list");
Diag << InitList->getSourceRange();
for (const Stmt *InitExpr : *SyntacticInitList) {
- Diag << FixItHint::CreateInsertion(
- InitExpr->getBeginLoc(),
- Designators.at(InitExpr->getBeginLoc()) + "=");
+ const std::string Designator =
+ LazyDesignators()->at(InitExpr->getBeginLoc());
+ if (!Designator.empty()) {
+ Diag << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
+ Designator + "=");
+ }
}
return;
}
@@ -118,11 +130,15 @@ void UseDesignatedInitializersCheck::check(
if (IgnoreMacros && InitExpr->getBeginLoc().isMacroID()) {
continue;
}
- diag(InitExpr->getBeginLoc(), "use designated init expression")
- << InitExpr->getSourceRange()
- << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
- Designators.at(InitExpr->getBeginLoc()) +
- "=");
+ DiagnosticBuilder Diag =
+ diag(InitExpr->getBeginLoc(), "use designated init expression");
+ Diag << InitExpr->getSourceRange();
+ const std::string Designator =
+ LazyDesignators()->at(InitExpr->getBeginLoc());
+ if (!Designator.empty()) {
+ Diag << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
+ Designator + "=");
+ }
}
}
>From faffdd69462eb1fa45354a21e0a929afc790d529 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Fri, 16 Feb 2024 21:02:54 +0100
Subject: [PATCH 49/50] fixup! Add option to ignore macros
---
.../checkers/modernize/use-designated-initializers.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index fbc659f086ad57..832453453c93ad 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -174,8 +174,10 @@ S13 s131 {1, 2};
S9 s92 {A, B};
// CHECK-MESSAGES-MACROS: :[[@LINE-1]]:9: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-MACROS: :[[@LINE-5]]:11: note: expanded from macro 'A'
#define DECLARE_S93 S9 s93 {1, 2}
DECLARE_S93;
// CHECK-MESSAGES-MACROS: :[[@LINE-1]]:1: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-MACROS: :[[@LINE-4]]:28: note: expanded from macro 'DECLARE_S93'
>From 7196618f993126bade17a5a6648a6b4e7e4864ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danny=20M=C3=B6sch?= <danny.moesch at icloud.com>
Date: Fri, 16 Feb 2024 21:03:35 +0100
Subject: [PATCH 50/50] Point to type to initialize
---
.../UseDesignatedInitializersCheck.cpp | 22 +++++-----
.../modernize/use-designated-initializers.cpp | 40 ++++++++++++++-----
2 files changed, 43 insertions(+), 19 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
index 8daa6e873443f7..730687fc5c0dc6 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDesignatedInitializersCheck.cpp
@@ -110,17 +110,21 @@ void UseDesignatedInitializersCheck::check(
LazyDesignators()->size()) {
return;
}
- DiagnosticBuilder Diag =
- diag(InitList->getLBraceLoc(), "use designated initializer list");
- Diag << InitList->getSourceRange();
- for (const Stmt *InitExpr : *SyntacticInitList) {
- const std::string Designator =
- LazyDesignators()->at(InitExpr->getBeginLoc());
- if (!Designator.empty()) {
- Diag << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
- Designator + "=");
+ {
+ DiagnosticBuilder Diag =
+ diag(InitList->getLBraceLoc(), "use designated initializer list");
+ Diag << InitList->getSourceRange();
+ for (const Stmt *InitExpr : *SyntacticInitList) {
+ const std::string Designator =
+ LazyDesignators()->at(InitExpr->getBeginLoc());
+ if (!Designator.empty()) {
+ Diag << FixItHint::CreateInsertion(InitExpr->getBeginLoc(),
+ Designator + "=");
+ }
}
}
+ diag(Type->getBeginLoc(), "this is the type to initialize",
+ DiagnosticIDs::Note);
return;
}
for (const auto *InitExpr : *SyntacticInitList) {
diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
index 832453453c93ad..0d8f288a0a1fe4 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-designated-initializers.cpp
@@ -24,12 +24,16 @@ S2 s21{.i=1, .j =2};
S2 s22 = {1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-6]]:1: note: this is the type to initialize
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-8]]:1: note: this is the type to initialize
// CHECK-FIXES: S2 s22 = {.i=1, .j=2};
S2 s23{1};
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-2]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-13]]:1: note: this is the type to initialize
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-15]]:1: note: this is the type to initialize
// CHECK-FIXES: S2 s23{.i=1};
S2 s24{.i = 1};
@@ -54,16 +58,20 @@ S3 s31 = {.s2 = 1, 2, 3.1};
S3 s32 = {{.i = 1, 2}};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES: :[[@LINE-2]]:20: warning: use designated init expression [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-3]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-4]]:20: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-15]]:1: note: this is the type to initialize
+// CHECK-MESSAGES: :[[@LINE-3]]:20: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-4]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-18]]:1: note: this is the type to initialize
+// CHECK-MESSAGES-POD: :[[@LINE-6]]:20: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-FIXES: S3 s32 = {.s2={.i = 1, .j=2}};
S3 s33 = {{2}, .d=3.1};
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: use designated init expression [modernize-use-designated-initializers]
// CHECK-MESSAGES: :[[@LINE-2]]:11: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-3]]:11: warning: use designated init expression [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-4]]:11: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-50]]:1: note: this is the type to initialize
+// CHECK-MESSAGES-POD: :[[@LINE-4]]:11: warning: use designated init expression [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-5]]:11: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-53]]:1: note: this is the type to initialize
// CHECK-FIXES: S3 s33 = {.s2={.i=2}, .d=3.1};
struct S4 {
@@ -73,10 +81,12 @@ struct S4 {
S4 s41 {2.2};
// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-7]]:1: note: this is the type to initialize
// CHECK-FIXES-SINGLE-ELEMENT: S4 s41 {.d=2.2};
S4 s42 = {{}};
// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-12]]:1: note: this is the type to initialize
// CHECK-FIXES-SINGLE-ELEMENT: S4 s42 = {.d={}};
template<typename S> S template1() { return {10, 11}; }
@@ -98,7 +108,9 @@ struct S6 {
S6 s61 {1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-2]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-7]]:1: note: this is the type to initialize
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-9]]:1: note: this is the type to initialize
// CHECK-FIXES: S6 s61 {.i=1, .s.j=2};
struct S7 {
@@ -110,6 +122,7 @@ struct S7 {
S7 s71 {1};
// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-1]]:8: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-SINGLE-ELEMENT: :[[@LINE-9]]:1: note: this is the type to initialize
// CHECK-FIXES-SINGLE-ELEMENT: S7 s71 {.u.k=1};
struct S8: S7 { int i; };
@@ -123,6 +136,7 @@ struct S9 {
S9 s91{1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-7]]:1: note: this is the type to initialize
// CHECK-FIXES: S9 s91{.i=1, .j=2};
struct S10 { int i = 1, j = 2; };
@@ -136,6 +150,7 @@ struct S11 { int i; S10 s10; };
S11 s111 { .i = 1 };
S11 s112 { 1 };
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-5]]:1: note: this is the type to initialize
// CHECK-FIXES: S11 s112 { .i=1 };
S11 s113 { .i=1, {}};
@@ -153,7 +168,9 @@ struct S12 {
S12 s121 {1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-7]]:1: note: this is the type to initialize
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-9]]:1: note: this is the type to initialize
// CHECK-FIXES: S12 s121 {.i=1, .j=2};
struct S13 {
@@ -166,7 +183,9 @@ struct S13 {
S13 s131 {1, 2};
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
-// CHECK-MESSAGES-POD: :[[@LINE-2]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES: :[[@LINE-10]]:1: note: this is the type to initialize
+// CHECK-MESSAGES-POD: :[[@LINE-3]]:10: warning: use designated initializer list [modernize-use-designated-initializers]
+// CHECK-MESSAGES-POD: :[[@LINE-12]]:1: note: this is the type to initialize
// CHECK-FIXES: S13 s131 {.k=1, .i=2};
#define A (3+2)
@@ -181,3 +200,4 @@ S9 s92 {A, B};
DECLARE_S93;
// CHECK-MESSAGES-MACROS: :[[@LINE-1]]:1: warning: use designated initializer list [modernize-use-designated-initializers]
// CHECK-MESSAGES-MACROS: :[[@LINE-4]]:28: note: expanded from macro 'DECLARE_S93'
+// CHECK-MESSAGES-MACROS: :[[@LINE-71]]:1: note: this is the type to initialize
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