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Merge pull request #10366 from poettering/in-set-fixes

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IN_SET() compile time check fixes
This commit is contained in:
Yu Watanabe 2018-10-13 17:25:36 +09:00 committed by GitHub
commit b4b3649a94
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1 changed files with 7 additions and 15 deletions
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22
src/basic/macro.h
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@ -56,10 +56,6 @@
#endif
/* Temporarily disable some warnings */
#define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT \
_Pragma("GCC diagnostic push"); \
_Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"")
#define DISABLE_WARNING_FORMAT_NONLITERAL \
_Pragma("GCC diagnostic push"); \
_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
@ -314,20 +310,13 @@ static inline int __coverity_check__(int condition) {
} while (false)
#if defined(static_assert)
/* static_assert() is sometimes defined in a way that trips up
* -Wdeclaration-after-statement, hence let's temporarily turn off
* this warning around it. */
#define assert_cc(expr) \
DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
static_assert(expr, #expr); \
REENABLE_WARNING
static_assert(expr, #expr);
#else
#define assert_cc(expr) \
DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
struct CONCATENATE(_assert_struct_, __COUNTER__) { \
char x[(expr) ? 0 : -1]; \
}; \
REENABLE_WARNING
};
#endif
#define assert_return(expr, r) \
@ -426,8 +415,11 @@ static inline int __coverity_check__(int condition) {
#define IN_SET(x, ...) \
({ \
bool _found = false; \
/* If the build breaks in the line below, you need to extend the case macros */ \
static _unused_ char _static_assert__macros_need_to_be_extended[20 - sizeof((int[]){__VA_ARGS__})/sizeof(int)]; \
/* If the build breaks in the line below, you need to extend the case macros. (We use "long double" as \
* type for the array, in the hope that checkers such as ubsan don't complain that the initializers for \
* the array are not representable by the base type. Ideally we'd use typeof(x) as base type, but that \
* doesn't work, as we want to use this on bitfields and gcc refuses typeof() on bitfields.) */ \
assert_cc((sizeof((long double[]){__VA_ARGS__})/sizeof(long double)) <= 20); \
switch(x) { \
FOR_EACH_MAKE_CASE(__VA_ARGS__) \
_found = true; \