[Bug c/112101] feature request: typeof_arg for extracting the type of a function's (or function pointer's) arguments

[malekwryyy at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112101

--- Comment #1 from Abdulmalek Almkainzi <malekwryyy at gmail dot com> ---
correction for the gurantee_type macro:

#define gurantee_type(exp, type) \
_Generic(exp, type: exp, default: (type){0})