https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93107
Bug ID: 93107
Summary: unable to deduce initializer_list<auto> from function
template
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: barry.revzin at gmail dot com
Target Milestone: ---
Reduced from StackOverflow:
#include <initializer_list>
template<typename T>
void Task() {}
auto a = &Task<int>;
auto b = { &Task<int> };
std::initializer_list<void(*)()> c = { &Task<int> };
auto d = { static_cast<void(*)()>(&Task<int>) };
The declarations for 'a', 'c', and 'd' all compile. But the declaration for 'b'
is rejected with:
<source>:7:23: error: unable to deduce 'std::initializer_list<auto>' from '{(&
Task<int>)}'
7 | auto b = { &Task<int> };
| ^
<source>:7:23: note: couldn't deduce template parameter 'auto'
Compiler returned: 1
All four compile on clang.
