https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113219
Bug ID: 113219
Summary: Overloaded ref-qualified conversion operator triggers
bogus -Wconversion
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: m.cencora at gmail dot com
Target Milestone: ---
Following code when compiled on any gcc version (checked all available on
godbolt since gcc-7) triggers conversion warnings.
I consider it bogus because it tells user that it has chosen a better overload
(which is good thing, right?).
Clang doesn't print any related warning even with -Weverything
g++ -std=c++17 -Wconversion
template <typename T>
struct wrapper
{
operator T() const&;
operator T&&() &&;
};
wrapper<int> createInt();
int test()
{
return createInt();
}
Output is:
<source>:13:21: warning: choosing 'wrapper<T>::operator T&&() && [with T =
int]' over 'wrapper<T>::operator T() const & [with T = int]' [-Wconversion]
13 | return createInt();
| ~~~~~~~~~^~
<source>:13:21: warning: for conversion from 'wrapper<int>' to 'int'
[-Wconversion]
<source>:13:21: note: because conversion sequence for the argument is better
