John Maddock writes:
Sorry, but why do you need it for that? the only choices for int_fast_t are:
int
or
some type wider than int that happens to be "faster" on the platform in question.
May be you right. An example of converting slow char to fast int attracted my attention and I posted a reference. Enums are out of scope of int_fast_t but even if they were, they are usually as fast as int (except for special cases like -fshort-enums flag on g++).
Still trying to understand what this ones for... John.
Well, if it's not performance then it's a size of application ;) If some function template treats enumerations as numeric then converting all enums to promoted types reduces number of instantiated functions. Typical example is integer to string conversion. BTW, why promotions exist in C/C++? -- Alexander Nasonov