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[headers] Unclear status for floating-point classification/comparison functions LWG4488 #8579
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This needs a library issue. We need to separate the C++ spec from the limitations of C that requires using macros for overloading.
Reacted by A. Jiang- changed the title
[-][headers] Unclear status for floating-point classification/comparison functions[/-][+][headers] Unclear status for floating-point classification/comparison functions LWG4488[/+]on Dec 20, 2025
[headers]/5 especially mentions "names which are defined as macros in C", which include floating-point classification/comparison functions (
fpclassify,isless, etc.).So, is
<cmath>disallowed to declare them in the global namespace as they seem to be excluded from "these names"?Also, [headers]/6 states
Does this mean that despite being functions, these names also need to be defined as macros in C++?
I think both answers are "no". Not sure whether this needs an LWG issue.