https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118381
Bug ID: 118381
Summary: GCC ignores missing 'noexcept' specifier for friend
declaration
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: wangbopku15 at gmail dot com
Target Milestone: ---
GCC does not generate errors on the following code:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
struct S
{
void f()
noexcept{}
};
class C
{
friend void S::f();
};
int main()
{
C ci;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
As a comparison, clang rejects it with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<source>:10:18: error: 'f' is missing exception specification 'noexcept'
10 | friend void S::f();
| ^
| noexcept
<source>:3:8: note: previous declaration is here
3 | void f()
| ^
1 error generated.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
EDG with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"<source>", line 10: error: allowing all exceptions is incompatible with
previous function "S::f" (declared at line 3)
friend void S::f();
^
"<source>", line 16: warning: variable "ci" was declared but never referenced
C ci;
^
1 error detected in the compilation of "<source>".
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
See https://godbolt.org/z/T9q7Pfa9q
