void replace (const char* const to_replace, const char* const with, char* to_change)

 

char* replace (const char* const, const char* const)

May I ask what's the point of sending an email literally consisting of two function signatures, with absolutely zero explanations attached?

https://isocpp.org/std/submit-a-proposal

"Post an initial brief description of your feature on the std-proposals mailing list, including especially the problem it solves and alternatives considered"

My 2 c,
-- 
Giuseppe D'Angelo