[PATCH] D97563: [clang-tidy] Enable modernize-concat-nested-namespaces also on headers

[Dmitry Polukhin via Phabricator via cfe-commits]

DmitryPolukhin created this revision.
DmitryPolukhin added reviewers: hokein, aaron.ballman, alexfh, JonasToth, njames93.
DmitryPolukhin added a project: clang.
Herald added a subscriber: xazax.hun.
DmitryPolukhin requested review of this revision.

For some reason the initial implementation of the check had an explicit check
for the main file to avoid being applied in headers. This diff removes this
check and add a test for the check on a header.

Similar approach was proposed in D61989 <https://reviews.llvm.org/D61989> but review there got stuck.

Test Plan: added new test case


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97563

Files:
  clang-tools-extra/clang-tidy/modernize/ConcatNestedNamespacesCheck.cpp
  clang-tools-extra/test/clang-tidy/checkers/Inputs/modernize-concat-nested-namespaces/modernize-concat-nested-namespaces.h
  clang-tools-extra/test/clang-tidy/checkers/modernize-concat-nested-namespaces.cpp


Index: clang-tools-extra/test/clang-tidy/checkers/modernize-concat-nested-namespaces.cpp
===================================================================
--- clang-tools-extra/test/clang-tidy/checkers/modernize-concat-nested-namespaces.cpp
+++ clang-tools-extra/test/clang-tidy/checkers/modernize-concat-nested-namespaces.cpp
@@ -1,4 +1,12 @@
-// RUN: %check_clang_tidy -std=c++17-or-later %s modernize-concat-nested-namespaces %t
+// RUN: cp %S/Inputs/modernize-concat-nested-namespaces/modernize-concat-nested-namespaces.h %T/modernize-concat-nested-namespaces.h
+// RUN: %check_clang_tidy -std=c++17 %s modernize-concat-nested-namespaces %t -- -header-filter=".*" -- -I %T
+// RUN: FileCheck -input-file=%T/modernize-concat-nested-namespaces.h %S/Inputs/modernize-concat-nested-namespaces/modernize-concat-nested-namespaces.h -check-prefix=CHECK-FIXES
+// Restore header file and re-run with c++2b:
+// RUN: cp %S/Inputs/modernize-concat-nested-namespaces/modernize-concat-nested-namespaces.h %T/modernize-concat-nested-namespaces.h
+// RUN: %check_clang_tidy -std=c++2b %s modernize-concat-nested-namespaces %t -- -header-filter=".*" -- -I %T
+// RUN: FileCheck -input-file=%T/modernize-concat-nested-namespaces.h %S/Inputs/modernize-concat-nested-namespaces/modernize-concat-nested-namespaces.h -check-prefix=CHECK-FIXES
+
+#include "modernize-concat-nested-namespaces.h"
 
 namespace n1 {}
 
@@ -159,3 +167,5 @@
 
   return 0;
 }
+
+// CHECK-MESSAGES: modernize-concat-nested-namespaces.h:1:1: warning: nested namespaces can be concatenated [modernize-concat-nested-namespaces]
Index: clang-tools-extra/test/clang-tidy/checkers/Inputs/modernize-concat-nested-namespaces/modernize-concat-nested-namespaces.h
===================================================================
--- /dev/null
+++ clang-tools-extra/test/clang-tidy/checkers/Inputs/modernize-concat-nested-namespaces/modernize-concat-nested-namespaces.h
@@ -0,0 +1,7 @@
+namespace nn1 {
+namespace nn2 {
+// CHECK-FIXES: namespace nn1::nn2
+void t();
+} // namespace nn2
+} // namespace nn1
+// CHECK-FIXES: }
Index: clang-tools-extra/clang-tidy/modernize/ConcatNestedNamespacesCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/modernize/ConcatNestedNamespacesCheck.cpp
+++ clang-tools-extra/clang-tidy/modernize/ConcatNestedNamespacesCheck.cpp
@@ -82,9 +82,6 @@
   if (!locationsInSameFile(Sources, ND.getBeginLoc(), ND.getRBraceLoc()))
     return;
 
-  if (!Sources.isInMainFile(ND.getBeginLoc()))
-    return;
-
   if (anonymousOrInlineNamespace(ND))
     return;
 


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