https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105996
Bug ID: 105996
Summary: reinterpret_cast in constexpr failure creating a pair
with a function pointer of class parent
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jdapena at igalia dot com
Target Milestone: ---
Created attachment 53150
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53150&action=edit
Test case
When creating an std::pair with a parameter that is a function pointer of the
parent class (but declared as function pointer of the same class), libstdc++
implementation will try to forward the pointer, even if it is the same type
(see the attached example).
This code is valid in Clang and MSVC, and was valid in GCC 5.x-7.x.
This has been detected through Chromium development with errors to compile
https://chromium.googlesource.com/chromium/src.git/+/refs/tags/105.0.5123.1/pdf/pdf_view_web_plugin.cc#879
