https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108717
Bug ID: 108717
Summary: pasting """_" and "µm" does not give a valid
preprocessing token in user-defined literal operator
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pacoarjonilla at yahoo dot es
Target Milestone: ---
The following code is accepted by clang and MSVC, but not GCC:
$ g++-13 --std=c++2b
'''
int operator""_µm(long double magnitude) noexcept // Micro sign, unicode 0x00b5
{
return magnitude;
}
'''
But character 'µ' is unicode XID_Start, so it should be accepted.
Compiler output:
<source>:1:16: error: expected initializer before '\U000000b5m'
1 | int operator""_µm(long double magnitude) noexcept \
| ^~
Compiler returned: 1
