c++ - Does returning by const value affect return value optimization? -


this question has answer here:

consider function

const std::string f() {     return "hello"; }

and call

std::string x = f();

regardless of whether value return types should const or not, fact return value const, prevent compiler performing return value optimization?

my understanding of rvo returned object constructed directly variable outside function. however, if return type const t, isn't same t, rvo prevented?


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