[clang] [Clang] Implement P3034R1 Module Declarations Shouldn’t be Macros (PR #90574)
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Tue Apr 30 02:20:12 PDT 2024
https://github.com/yronglin created https://github.com/llvm/llvm-project/pull/90574
This PR implement [P3034R1 Module Declarations Shouldn’t be Macros](https://wg21.link/P3034R1)
>From 1dcb4c3ac1efaf3a6a4317751e23089a6c8ccac1 Mon Sep 17 00:00:00 2001
From: yronglin <yronglin777 at gmail.com>
Date: Tue, 30 Apr 2024 17:18:26 +0800
Subject: [PATCH] =?UTF-8?q?[Clang]=20Implement=20P3034R1=20Module=20Declar?=
=?UTF-8?q?ations=20Shouldn=E2=80=99t=20be=20Macros?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: yronglin <yronglin777 at gmail.com>
---
clang/docs/ReleaseNotes.rst | 2 ++
.../clang/Basic/DiagnosticParseKinds.td | 2 ++
clang/lib/Parse/Parser.cpp | 7 ++++
clang/test/CXX/cpp/cpp.module/p1.cppm | 13 +++++++
clang/test/CXX/cpp/cpp.module/version.h | 8 +++++
.../basic/basic.link/module-declaration.cpp | 35 +++++++++++--------
.../dcl.module/dcl.module.import/p1.cppm | 4 +--
clang/test/SemaCXX/modules.cppm | 4 +++
clang/www/cxx_status.html | 2 +-
9 files changed, 59 insertions(+), 18 deletions(-)
create mode 100644 clang/test/CXX/cpp/cpp.module/p1.cppm
create mode 100644 clang/test/CXX/cpp/cpp.module/version.h
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 1abc00a25f1f42..40c6bd63e9948f 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -153,6 +153,8 @@ C++2c Feature Support
- Implemented `P2748R5 Disallow Binding a Returned Glvalue to a Temporary <https://wg21.link/P2748R5>`_.
+- Implemented `P3034R1 Module Declarations Shouldn’t be Macros <https://wg21.link/P3034R1>`_.
+
Resolutions to C++ Defect Reports
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- Substitute template parameter pack, when it is not explicitly specified
diff --git a/clang/include/clang/Basic/DiagnosticParseKinds.td b/clang/include/clang/Basic/DiagnosticParseKinds.td
index fdffb35ea0d955..0d4b526ec6d15a 100644
--- a/clang/include/clang/Basic/DiagnosticParseKinds.td
+++ b/clang/include/clang/Basic/DiagnosticParseKinds.td
@@ -1671,6 +1671,8 @@ def err_unexpected_module_decl : Error<
"module declaration can only appear at the top level">;
def err_module_expected_ident : Error<
"expected a module name after '%select{module|import}0'">;
+def err_module_decl_cannot_be_macros : Error<
+ "module declaration cannot be a macro">;
def err_attribute_not_module_attr : Error<
"%0 attribute cannot be applied to a module">;
def err_keyword_not_module_attr : Error<
diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
index adcbe5858bc78e..ef66348a83125c 100644
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -2690,6 +2690,13 @@ bool Parser::ParseModuleName(
return true;
}
+ // P3034R1: Module Declarations Shouldn’t be Macros
+ if (!IsImport && Tok.getLocation().isMacroID()) {
+ Diag(Tok, diag::err_module_decl_cannot_be_macros);
+ SkipUntil(tok::semi);
+ return true;
+ }
+
// Record this part of the module path.
Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
ConsumeToken();
diff --git a/clang/test/CXX/cpp/cpp.module/p1.cppm b/clang/test/CXX/cpp/cpp.module/p1.cppm
new file mode 100644
index 00000000000000..b439366db3fba0
--- /dev/null
+++ b/clang/test/CXX/cpp/cpp.module/p1.cppm
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -std=c++20 -emit-module-interface %s -triple x86_64-linux-gnu -DTEST=1 -verify
+// RUN: %clang_cc1 -std=c++20 -emit-module-interface %s -triple x86_64-linux-gnu -DTEST=2 -verify
+
+module;
+export module x;
+#include "version.h"
+#if TEST == 1
+export module VERSION; // expected-error {{module declaration cannot be a macro}}
+#endif // TEST == 1
+
+#if TEST == 2
+export module A.B; // expected-error {{module declaration cannot be a macro}}
+#endif // TEST == 2
diff --git a/clang/test/CXX/cpp/cpp.module/version.h b/clang/test/CXX/cpp/cpp.module/version.h
new file mode 100644
index 00000000000000..4608934290950b
--- /dev/null
+++ b/clang/test/CXX/cpp/cpp.module/version.h
@@ -0,0 +1,8 @@
+#ifndef VERSION_H
+#define VERSION_H
+
+#define VERSION libv5
+#define A a
+#define B b
+
+#endif
diff --git a/clang/test/CXX/module/basic/basic.link/module-declaration.cpp b/clang/test/CXX/module/basic/basic.link/module-declaration.cpp
index d71358cc7a571f..aa4bb52a57face 100644
--- a/clang/test/CXX/module/basic/basic.link/module-declaration.cpp
+++ b/clang/test/CXX/module/basic/basic.link/module-declaration.cpp
@@ -9,26 +9,26 @@
//
// Module implementation for unknown and known module. (The former is ill-formed.)
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -verify -x c++ %t/M.cpp \
-// RUN: -DTEST=1 -DEXPORT= -DMODULE_NAME=z
+// RUN: -DTEST=1
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x=%t/x.pcm -fmodule-file=x.y=%t/x.y.pcm -verify -x c++ %t/M.cpp \
-// RUN: -DTEST=2 -DEXPORT= -DMODULE_NAME=x
+// RUN: -DTEST=2
//
// Module interface for unknown and known module. (The latter is ill-formed due to
// redefinition.)
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -verify %t/M.cpp \
-// RUN: -DTEST=3 -DEXPORT=export -DMODULE_NAME=z
+// RUN: -DTEST=3
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -verify %t/M.cpp \
-// RUN: -DTEST=4 -DEXPORT=export -DMODULE_NAME=x
+// RUN: -DTEST=4
//
// Miscellaneous syntax.
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -verify %t/M.cpp \
-// RUN: -DTEST=7 -DEXPORT=export -DMODULE_NAME='z elderberry'
+// RUN: -DTEST=7
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -verify %t/M.cpp \
-// RUN: -DTEST=8 -DEXPORT=export -DMODULE_NAME='z [[]]'
+// RUN: -DTEST=8
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -verify %t/M.cpp \
-// RUN: -DTEST=9 -DEXPORT=export -DMODULE_NAME='z [[fancy]]'
+// RUN: -DTEST=9
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -verify %t/M.cpp \
-// RUN: -DTEST=10 -DEXPORT=export -DMODULE_NAME='z [[maybe_unused]]'
+// RUN: -DTEST=10
//--- x.cppm
export module x;
@@ -40,15 +40,20 @@ int c;
//--- M.cpp
-EXPORT module MODULE_NAME;
-#if TEST == 7
-// expected-error at -2 {{expected ';'}} expected-error at -2 {{a type specifier is required}}
+#if TEST == 1
+module z; // expected-error {{module 'z' not found}}
+#elif TEST == 2
+module x; // expected-no-diagnostics
+#elif TEST == 3
+export module z; // expected-no-diagnostics
+#elif TEST == 4
+export module x; // expected-no-diagnostics
+#elif TEST == 7
+export module z elderberry; // expected-error {{expected ';'}} expected-error {{a type specifier is required}}
#elif TEST == 9
-// expected-warning at -4 {{unknown attribute 'fancy' ignored}}
+export module z [[fancy]]; // expected-warning {{unknown attribute 'fancy' ignored}}
#elif TEST == 10
-// expected-error-re at -6 {{'maybe_unused' attribute cannot be applied to a module{{$}}}}
-#elif TEST == 1
-// expected-error at -8 {{module 'z' not found}}
+export module z [[maybe_unused]]; // expected-error-re {{'maybe_unused' attribute cannot be applied to a module{{$}}}}
#else
// expected-no-diagnostics
#endif
diff --git a/clang/test/CXX/module/dcl.dcl/dcl.module/dcl.module.import/p1.cppm b/clang/test/CXX/module/dcl.dcl/dcl.module/dcl.module.import/p1.cppm
index 873e4c0edeac25..074589ccc26926 100644
--- a/clang/test/CXX/module/dcl.dcl/dcl.module/dcl.module.import/p1.cppm
+++ b/clang/test/CXX/module/dcl.dcl/dcl.module/dcl.module.import/p1.cppm
@@ -35,9 +35,9 @@ int use_3 = c; // expected-error {{use of undeclared identifier 'c'}}
//--- test.cpp
#ifdef INTERFACE
-export module MODULE_NAME;
+export module MODULE_NAME; // expected-error {{module declaration cannot be a macro}}
#else
-module MODULE_NAME;
+module MODULE_NAME; // expected-error {{module declaration cannot be a macro}}
#endif
import x;
diff --git a/clang/test/SemaCXX/modules.cppm b/clang/test/SemaCXX/modules.cppm
index 41204be76eafa1..75bbc5366d4a71 100644
--- a/clang/test/SemaCXX/modules.cppm
+++ b/clang/test/SemaCXX/modules.cppm
@@ -7,6 +7,10 @@
// expected-no-diagnostics
#endif
+#if TEST == 3
+// expected-error {{module declaration cannot be a macro}}
+#endif // TEST == 3
+
export module foo;
static int m;
diff --git a/clang/www/cxx_status.html b/clang/www/cxx_status.html
index 0996abc2405857..8ae9a25caf3604 100755
--- a/clang/www/cxx_status.html
+++ b/clang/www/cxx_status.html
@@ -182,7 +182,7 @@ <h2 id="cxx26">C++2c implementation status</h2>
<tr>
<td>Module Declarations Shouldn’t be Macros</td>
<td><a href="https://wg21.link/P3034R1">P3034R1</a> (<a href="#dr">DR</a>)</td>
- <td class="none" align="center">No</td>
+ <td class="unreleased" align="center">Clang 19</td>
</tr>
<tr>
<td>Trivial infinite loops are not Undefined Behavior</td>
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