[Bug c++/71985] narrowing in initializer lists is not ill-formed where required

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71985

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|DUPLICATE                   |---

--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
A simpler testcase:

#include <vector>
double d;
std::vector<int> v1 { d, 0.0, 0 };

prog.cc:3:33: warning: narrowing conversion of 'd' from 'double' to 'int'
inside { } [-Wnarrowing]
 std::vector<int> v1 { d, 0.0, 0 };
                                 ^
prog.cc:3:33: warning: narrowing conversion of 'd' from 'double' to 'int'
inside { } [-Wnarrowing]
prog.cc:3:33: error: narrowing conversion of '0.0' from 'double' to 'int'
inside { } [-Wnarrowing]


It doesn't make sense that we give a warning for 'd' if no value of 'd' would
ever give a warning.


This case is different from:

int i;
char c[] = { i, 0 };