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Added source file and line to static assert reports.

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pull/275/head
Florian Fleissner 7 years ago
parent ae93c18728
commit e9759ee64a
1 changed files with 30 additions and 9 deletions
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37
src/macro_helpers.h
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@ -27,9 +27,15 @@
#define __NN__
// Some auxiliary macros
//
#define __STRINGIZE(S) #S
#define STRINGIZE(S) __STRINGIZE(S)
// Allow for the creation of verbose messages in static_asserts
//
#define VEROSE_STATIC_ASSERT_HEADER \
__NL__ "\n" \
__NL__ "\n***************************************************************" \
__NL__ "\n******************** READ THIS CAREFULLY! *********************" \
__NL__ "\n***************************************************************" \
@ -39,7 +45,14 @@ __NL__ "\n"
__NL__ "\n" \
__NL__ "\n***************************************************************" \
__NL__ "\n***************************************************************" \
__NL__ "\n***************************************************************"
__NL__ "\n***************************************************************" \
__NL__ "\n"
#define VERBOSE_FILE_INFO \
__NL__ "\nFile: " __FILE__
#define VERBOSE_LINE_INFO \
__NL__ "\nLine: " STRINGIZE(__LINE__)
// The macro function RESTRICT_ARGS_COUNT can be used to generate more
// verbose error messages when users supply an insuitable number of arguments
@ -79,24 +92,32 @@ __NN__ finally evaluates to. \
__NN__ Please not that passing B through this macro is a must \
__NN__ as we need it for the comma operator to work. \
__NN__ */ \
__NN__ static_assert(sizeof(const char) == sizeof(/*(const char*[]){*/ #__VA_ARGS__ /*}*/), \
__NN__ /* sizeof((int[]){ __VA_ARGS__ }) evaluates to \
__NN__ non-zero if __VA_ARGS__ is non-empty and zero otherwise. \
__NN__ static_assert(sizeof(const char) == sizeof(#__VA_ARGS__ ), \
__NN__ /* sizeof(const char) == sizeof(#__VA_ARGS__ ) checks the quoted \
__NN__ list of additional arguments. If there are none, then the \
__NN__ length of #__VA_ARGS__ is a single char as it contains '\0'. \
__NN__ This check is not able to find the corner case of a single \
__NN__ superfluous comma at the end of the macro arguments as this \
__NN__ causes #__VA_ARGS__ being empty (only '\0'). \
__NN__ */ \
__NN__ VEROSE_STATIC_ASSERT_HEADER \
__NN__ \
__NL__ "\nStrange arguments encountered in call to " #ORIGINAL_MACRO "." \
__NN__ VERBOSE_FILE_INFO \
__NN__ VERBOSE_LINE_INFO \
__NL__ "\n" \
__NL__ "\nStrange arguments encountered in invocation of " #ORIGINAL_MACRO "." \
__NL__ "\n" \
__NL__ "\nPlease make sure to pass exactly " #NUM_EXPECTED_ARGS \
__NN__ " macro arguments to" \
__NL__ "\n" #ORIGINAL_MACRO ". Also make sure that there are no dangling" \
__NL__ "\ncommas at the end of the argument list. This is the superfluous" \
__NL__ "\npart at the end of the macro arguments list." \
__NL__ "\ncommas at the end of the argument list." \
__NL__ "\n" \
__NL__ "\n\'" #__VA_ARGS__ "\'" \
__NL__ "\nThis is the superfluous part at the end of the macro" \
__NL__ "\narguments list: \'" #__VA_ARGS__ "\'" \
__NN__ \
__NN__ VERBOSE_STATIC_ASSERT_FOOTER \
__NL__ ); \
__NL__ \
__NL__ }, /* End of dummy lambda, the comma operator's A operand. */ \
__NL__ B /* The overall ASSERT_ARGS_COUNT evaluates to B. */ \
__NL__ )

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