I see this in the standard C++ libraries for my system, as well as some of the headers in a library I’m using.
What are the semantics of these two definitions? Is there a good reference for #defines like this other than the source itself?
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I see this in the standard C++ libraries for my system, as well as some of the headers in a library I’m using.
What are the semantics of these two definitions? Is there a good reference for #defines like this other than the source itself?
__STDC_LIMIT_MACROSand__STDC_CONSTANT_MACROSare a workaround to allow C++ programs to usestdint.hmacros specified in the C99 standard that aren’t in the C++ standard. The macros, such asUINT8_MAX,INT64_MIN, andINT32_C()may be defined already in C++ applications in other ways. To allow the user to decide if they want the macros defined as C99 does, many implementations require that__STDC_LIMIT_MACROSand__STDC_CONSTANT_MACROSbe defined beforestdint.his included.This isn’t part of the C++ standard, but it has been adopted by more than one implementation.