https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109871
Bug ID: 109871
Summary: error: call of overloaded ... ambiguous (std::vector
vs designated initializers)
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gnu.ojxq8 at dralias dot com
Target Milestone: ---
When calling an overloaded function or constructor that takes a std::vector, as
well as a struct that allows designated initializers, the code is incorrectly
rejected by all versions of GCC, but accepted by Clang.
Example:
----------------
#include <vector>
struct S {};
struct Options {
int opt{};
};
void A(std::vector<S>) {}
void A(Options) {}
int main() { A({.opt = 1}); }
----------------
Error:
----------------
<source>: In function 'int main()':
<source>:8:15: error: call of overloaded 'A(<brace-enclosed initializer list>)'
is ambiguous
8 | int main() { A({.opt = 1}); }
| ~^~~~~~~~~~~~
<source>:6:6: note: candidate: 'void A(std::vector<S>)'
6 | void A(std::vector<S>) {}
| ^
<source>:7:6: note: candidate: 'void A(Options)'
7 | void A(Options) {}
| ^
Compiler returned: 1
----------------
There is PR 59389 and PR 86997, but they seem unrelated because they are not
about designated initializers.
