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llvm-project/clang/test/Preprocessor/warn-macro-unused.c

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When redefining a macro don't warn twice if it's not used and don't warn for duplicate definition by command line options. Fixes rdar://8875916. llvm-svn: 123767
2011-01-19 03:50:15 +08:00
// RUN: %clang_cc1 %s -Wunused-macros -Dfoo -Dfoo -verify
Don't warn for unused macro when undef'ing it, if it comes from an included file. rdar://9745065 llvm-svn: 134919
2011-07-12 04:39:47 +08:00
#include "warn-macro-unused.h"
Split isFromMainFile into two functions. Basically, isInMainFile considers line markers, and isWrittenInMainFile doesn't. Distinguishing between the two is useful when dealing with files which are preprocessed files or rewritten with -frewrite-includes (so we don't, for example, print useless warnings). llvm-svn: 188968
2013-08-22 08:27:10 +08:00
# 1 "warn-macro-unused-fake-header.h" 1
#define unused_from_fake_header
# 5 "warn-macro-unused.c" 2
When redefining a macro don't warn twice if it's not used and don't warn for duplicate definition by command line options. Fixes rdar://8875916. llvm-svn: 123767
2011-01-19 03:50:15 +08:00
#define unused // expected-warning {{macro is not used}}
#define unused
unused
Don't warn for unused macro when undef'ing it, if it comes from an included file. rdar://9745065 llvm-svn: 134919
2011-07-12 04:39:47 +08:00
// rdar://9745065
#undef unused_from_header // no warning