https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49251
LogicStuff <logicstuffs at gmail dot com> changed:
What |Removed |Added
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CC| |logicstuffs at gmail dot com
--- Comment #6 from LogicStuff <logicstuffs at gmail dot com> ---
#include <tuple>
template< std::size_t... Indices >
struct indices {};
template< class... Args >
void sink( Args&&... ) {}
template< class Tuple, std::size_t... Indices >
void unpack_test( Tuple t, indices<Indices...> ) {
sink( std::get<Indices>(t)... );
}
int main() {
unpack_test( std::tuple<>(), indices<>() );
}
------------------------
With the small change in the signature (notice passing `t` by value), is this
warning acceptable?
bug.cc: In instantiation of 'void unpack_test(Tuple, indices<Indices ...>)
[with Tuple = std::tuple<>; long unsigned int ...Indices = {}]':
bug.cc:15:44: required from here
bug.cc:10:25: warning: parameter 't' set but not used
[-Wunused-but-set-parameter]
void unpack_test( Tuple t, indices<Indices...> ) {
^
Observed with various versions from 4.4.7 to 9.0.0 201810. Not observed with
Clang.
