1 // RUN: %check_clang_tidy %s bugprone-lambda-function-name %t
2 
3 void Foo(const char* a, const char* b, int c) {}
4 
5 #define FUNC_MACRO Foo(__func__, "", 0)
6 #define FUNCTION_MACRO Foo(__FUNCTION__, "", 0)
7 #define EMBED_IN_ANOTHER_MACRO1 FUNC_MACRO
8 
9 void Positives() {
10   [] { __func__; }();
11   // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: inside a lambda, '__func__' expands to the name of the function call operator; consider capturing the name of the enclosing function explicitly [bugprone-lambda-function-name]
12   [] { __FUNCTION__; }();
13   // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: inside a lambda, '__FUNCTION__' expands to the name of the function call operator; consider capturing the name of the enclosing function explicitly [bugprone-lambda-function-name]
14   [] { FUNC_MACRO; }();
15   // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: inside a lambda, '__func__' expands to the name of the function call operator; consider capturing the name of the enclosing function explicitly [bugprone-lambda-function-name]
16   [] { FUNCTION_MACRO; }();
17   // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: inside a lambda, '__FUNCTION__' expands to the name of the function call operator; consider capturing the name of the enclosing function explicitly [bugprone-lambda-function-name]
18   [] { EMBED_IN_ANOTHER_MACRO1; }();
19   // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: inside a lambda, '__func__' expands to the name of the function call operator; consider capturing the name of the enclosing function explicitly [bugprone-lambda-function-name]
20 }
21 
22 #define FUNC_MACRO_WITH_FILE_AND_LINE Foo(__func__, __FILE__, __LINE__)
23 #define FUNCTION_MACRO_WITH_FILE_AND_LINE Foo(__FUNCTION__, __FILE__, __LINE__)
24 #define EMBED_IN_ANOTHER_MACRO2 FUNC_MACRO_WITH_FILE_AND_LINE
25 
26 void Negatives() {
27   __func__;
28   __FUNCTION__;
29 
30   // __PRETTY_FUNCTION__ should not trigger a warning because its value is
31   // actually potentially useful.
32   __PRETTY_FUNCTION__;
33   [] { __PRETTY_FUNCTION__; }();
34 
35   // Don't warn if __func__/__FUNCTION is used inside a macro that also uses
36   // __FILE__ and __LINE__, on the assumption that __FILE__ and __LINE__ will
37   // be useful even if __func__/__FUNCTION__ is not.
38   [] { FUNC_MACRO_WITH_FILE_AND_LINE; }();
39   [] { FUNCTION_MACRO_WITH_FILE_AND_LINE; }();
40   [] { EMBED_IN_ANOTHER_MACRO2; }();
41 }
42