From 3bb156523a9b9b96de408cd72ba277f800f64b5a Mon Sep 17 00:00:00 2001
From: Haojian Wu <hokein@google.com>
Date: Thu, 12 May 2016 10:00:49 +0000
Subject: [PATCH] [clang-tidy] Ignore using-declarations defined in marcro in
 misc-unused-using-decls checks.

Reviewers: djasper

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D20197

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@269278 91177308-0d34-0410-b5e6-96231b3b80d8
---
 clang-tidy/misc/UnusedUsingDeclsCheck.cpp   | 4 ++++
 test/clang-tidy/misc-unused-using-decls.cpp | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/clang-tidy/misc/UnusedUsingDeclsCheck.cpp b/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
index 8a70e16..5fbc041 100644
--- a/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
+++ b/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
@@ -35,6 +35,10 @@ void UnusedUsingDeclsCheck::check(const MatchFinder::MatchResult &Result) {
     const auto *TargetDecl =
         Using->shadow_begin()->getTargetDecl()->getCanonicalDecl();
 
+    // Ignores using-declarations defined in macros.
+    if (TargetDecl->getLocation().isMacroID())
+      return;
+
     // Ignores using-declarations defined in class definition.
     if (isa<CXXRecordDecl>(TargetDecl->getDeclContext()))
       return;
diff --git a/test/clang-tidy/misc-unused-using-decls.cpp b/test/clang-tidy/misc-unused-using-decls.cpp
index 47917a8..15538a8 100644
--- a/test/clang-tidy/misc-unused-using-decls.cpp
+++ b/test/clang-tidy/misc-unused-using-decls.cpp
@@ -70,6 +70,14 @@ using n::UnusedFunc; // UnusedFunc
 using n::cout;
 using n::endl;
 
+#define DEFINE_INT(name)        \
+  namespace INT {               \
+  static const int _##name = 1; \
+  }                             \
+  using INT::_##name
+DEFINE_INT(test);
+#undef DEFIND_INT
+
 // ----- Usages -----
 void f(B b);
 void g() {