https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66421
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Version|unknown |4.9.2
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
template<typename... T> struct tuple { };
template<typename... T> tuple<T...> make_tuple(T&&...) { return {}; }
template <typename... Params>
void foo(Params... params) {
auto t = make_tuple((int)params...);
}
template <typename... Params>
void bar(Params... params) {
tuple<decltype((int)params)...> t = make_tuple((int)params...);
}
int main() {
foo(1,2,3); // Fails, clang++ compiles it
bar(1,2,3); // Compiles correctly
}
t.cc: In instantiation of ‘void foo(Params ...) [with Params = {int, int,
int}]’:
t.cc:16:14: required from here
t.cc:7:39: error: conversion from ‘tuple<int, int, int>’ to non-scalar type
‘tuple<int>’ requested
auto t = make_tuple((int)params...);
^
