https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125580
Bug ID: 125580
Summary: Misspelling the reflection operator as ^ ^ with a
space in between gives a confusing error message
Product: gcc
Version: 16.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: programmer00001h at gmail dot com
Target Milestone: ---
Created attachment 64611
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64611&action=edit
The problematic code
Code:
consteval{
^ ^3;
}
compiled with g++ -std=c++26 -freflection ice.cpp, GCC gives:
ice.cpp: In static member function ‘<lambda()> static’:
ice.cpp:2:5: error: reflection is only available in C++26 with ‘-freflection’
2 | ^ ^3;
| ^
ice.cpp:2:7: error: expected primary-expression before ‘^’ token
2 | ^ ^3;
| ^
The second error is expected, but GCC also forgot that -freflection was
enabled? somehow?
(While 3 is not a valid entity to reflect on, that is not relevant here; ^ ^int
also gives the same confusing error message. I chose to use a number here for
simplicity, because ^ ^int gives three errors instead of two.)
Output of gcc -v:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/16.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure
--enable-languages=ada,c,c++,d,fortran,go,lto,m2,objc,obj-c++,rust,cobol
--enable-bootstrap --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://gitlab.archlinux.org/archlinux/packaging/packages/gcc/-/issues
--with-build-config=bootstrap-lto --with-linker-hash-style=gnu
--with-system-zlib --enable-cet=auto --enable-checking=release
--enable-clocale=gnu --enable-default-pie --enable-default-ssp
--enable-gnu-indirect-function --enable-gnu-unique-object
--enable-libstdcxx-backtrace --enable-link-serialization=1
--enable-linker-build-id --enable-lto --enable-multilib --enable-plugin
--enable-shared --enable-threads=posix --disable-libssp --disable-libstdcxx-pch
--disable-werror --disable-fixincludes
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.1.1 20260430 (GCC)
