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added warning on unused Result return value and a way to supress this warning

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This commit is contained in:
Timerix 2025-11-08 22:18:33 +05:00
parent dbe8924466
commit ee2b88a412
2 changed files with 13 additions and 2 deletions
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9
include/tlibc/errors.h
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@ -38,8 +38,13 @@ typedef struct Result_ {
};
} Result_;
#define Result(T) Result_
///Use this macro only to specify function return type.
/// To declare variable, use ResultVar().
/// Warning can be suppressed by IGNORE_RESULT
#define Result(T) Result_ ATTRIBUTE_WARN_UNUSED_RESULT
#define ResultVar(T) Result_
///USAGE: IGNORE_RESULT trySomething();
#define IGNORE_RESULT Result_ __ignored_##__LINE__ ATTRIBUTE_UNUSED =
#define RESULT_ERROR(MSG, IS_MSG_ON_HEAP) (Result_){ .error = Error_create(MSG, IS_MSG_ON_HEAP, ErrorCallPos_here()) }
#define RESULT_ERROR_FMT(FORMAT, ARGS...) RESULT_ERROR(sprintf_malloc(4096, FORMAT ,##ARGS), true)

6
include/tlibc/std.h
View File

@ -73,6 +73,12 @@ typedef const char* cstr;
#define ATTRIBUTE_NORETURN \
__attribute__ ((__noreturn__))
#define ATTRIBUTE_WARN_UNUSED_RESULT \
__attribute__((warn_unused_result))
#define ATTRIBUTE_UNUSED \
__attribute__ ((unused))
///@brief https://gcc.gnu.org/onlinedocs/gcc-15.2.0/gcc/Common-Function-Attributes.html#index-format-function-attribute
///@param FMT_ARG_INDEX Index of format literal argument. First argument is 1.
///@param VARIADIC_ARGS_INDEX Index of variadic arguments.