https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122630
Bug ID: 122630
Summary: Function parameter conversion is broken when
dereferencing a function/pointer-to-function
Product: gcc
Version: 15.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jengelh at inai dot de
Target Milestone: ---
== Input ==
#include <span>
extern void f();
extern void g1(std::span<const int>);
extern void (*g2)(std::span<const int>);
void f()
{
int num[] = {2, 17, 18, 19};
g1(num);
(*g1)(num);
(*g2)(num);
}
== Observed output ==
The line with (*g1) and (*g2) fail to compile.
$ g++-15 -std=c++20 -c 2.cpp
2.cpp: In function ‘void f()’:
2.cpp:9:15: error: could not convert ‘(int*)(& num)’ from ‘int*’ to
‘std::span<const int>’
9 | (*g1)(num);
| ^~~
2.cpp:10:15: error: could not convert ‘(int*)(& num)’ from ‘int*’ to
‘std::span<const int>’
10 | (*g2)(num);
| ^~~
== Expected output ==
Do not fail. clang++-16/19/21-with-gnustdlibc++ succeed.
