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* [Bug c++/109295] New: deducing brace-enclosed initializer list using import <initializer_list> fails to compile
@ 2023-03-27 10:03 matthewsatti at gmail dot com
2023-03-27 12:55 ` [Bug c++/109295] " ppalka at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: matthewsatti at gmail dot com @ 2023-03-27 10:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109295
Bug ID: 109295
Summary: deducing brace-enclosed initializer list using import
<initializer_list> fails to compile
Product: gcc
Version: 12.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: matthewsatti at gmail dot com
Target Milestone: ---
Created attachment 54765
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54765&action=edit
pre-processed file using -save-temps
Hello,
I've been experimenting with C++20 modules and came across the following issue.
Given the program:
import <initializer_list>;
int main() {
auto values = {1, 2, 3};
return 0;
}
and trying to compile with these commands:
g++ -std=c++20 -Wall -Wextra -fmodules-ts -x c++-system-header initializer_list
g++ -std=c++20 -Wall -Wextra -fmodules-ts main.cxx -o main
produces the compile error:
main.cxx: In function ‘int main()’:
main.cxx:4:31: error: deducing from brace-enclosed initializer list requires
‘#include <initializer_list>’
1 | import <initializer_list>;
+++ |+#include <initializer_list>
2 |
3 | int main() {
4 | auto values = {1, 2, 3};
| ^
My assumption is that import <initializer_list>; should have worked?
gcc -v output:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/12.2.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++,d --enable-bootstrap
--prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--with-build-config=bootstrap-lto --with-linker-hash-style=gnu
--with-system-zlib --enable-__cxa_atexit --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
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.2.1 20230201 (GCC)
I have also attached the pre-processed output
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/109295] deducing brace-enclosed initializer list using import <initializer_list> fails to compile
2023-03-27 10:03 [Bug c++/109295] New: deducing brace-enclosed initializer list using import <initializer_list> fails to compile matthewsatti at gmail dot com
@ 2023-03-27 12:55 ` ppalka at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: ppalka at gcc dot gnu.org @ 2023-03-27 12:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109295
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
CC| |ppalka at gcc dot gnu.org
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Thanks for the bug report. This appears to be a dup of PR102576 which has been
fixed for GCC 13.
*** This bug has been marked as a duplicate of bug 102576 ***
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-03-27 10:03 [Bug c++/109295] New: deducing brace-enclosed initializer list using import <initializer_list> fails to compile matthewsatti at gmail dot com
2023-03-27 12:55 ` [Bug c++/109295] " ppalka at gcc dot gnu.org
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