https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109936
Bug ID: 109936
Summary: error: extended character ≠ is not valid in an
identifier
Product: gcc
Version: 11.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: adam at wozniakconsulting dot com
Target Milestone: ---
Created attachment 55138
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55138&action=edit
cpp file that demonstrates bug
#define X(x)
X(🤔) // emojis work
X(≠) // this "not equal" does NOT work!
///////////////////////////////////////////
#if 0
compile with "g++ -c bad.cpp" gives:
bad.cpp:3:3: error: extended character ≠ is not valid in an identifier
3 | X(≠)
| ^
compile with "g++ -c -fextended-identifiers bad.cpp" gives the same error.
g++ --version says:
g++ (Ubuntu 11.3.0-1ubuntu1~22.04.1) 11.3.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
/lib/cpp --version says:
cpp (Ubuntu 11.3.0-1ubuntu1~22.04.1) 11.3.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
manual for both gcc and cpp says:
-fextended-identifiers
Accept universal character names and extended characters in
identifiers. This option is enabled by default for C99 (and later
C standard versions) and C++.
BTW, i get similar error with the following unicode code points. while some
may have reasonable explanations, many do not.
0080 - 00a7
00a9
00ab - 00ac
00ae
00b0 - 00b1
00b6
00bb
00bf
00d7
00f7
0300 - 036f
1680
180e
1dc0 - 1dff
2000 - 200a
200e - 2029
202f - 203e
2041 - 2053
2055 - 205f
20d0 - 20ff
2190 - 245f
2500 - 2775
2794 - 2bff
2e00 - 2e7f
3000 - 3003
3008 - 3020
3030
e000 - f8ff
fdd0 - fdef
fe20 - fe2f
fe45 - fe46
#endif
