https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71590
--- Comment #4 from gliu <markowitz73 at gmail dot com> ---
(In reply to Martin Sebor from comment #3)
> There is a (subtle) difference between the initialization in "std::string s
> = a;" and the assignment in "std::string s; s = a;" When valid, the
> initialization invokes a constructor (possibly two), while the assignment
> invokes the assignment operator. But since std::string doesn't have a
> constructor that takes just a char (or int) argument the initialization is
> invalid. (As mentioned, it does have an assignment operator that takes a
> char.)
>
> (For completeness' sake, in C++ 11, std::string has a constructor that takes
> a std::initializer_list, and so with G++ a string object can be constructed
> like so: "std::string s = { a };" But this is a G++ extension and not a
> valid C++ 11 construct so G++ will give a warning: narrowing conversion of
> ‘a’ from ‘int’ to ‘char’ inside { }.
understood, thanks for your reply.
