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* [Bug c++/83167] decltype((x)) inside lambda is considered odr-use if x is not a reference [not found] <bug-83167-4@http.gcc.gnu.org/bugzilla/> @ 2021-08-07 19:34 ` pinskia at gcc dot gnu.org 2022-10-27 5:23 ` pinskia at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-08-07 19:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83167 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=79620, | |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=94376 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- No compiler fully accepts this code. clang fails on the 2nd and 4th asserts ICC fails on the 2nd assert only MSVC fails on all 4 asserts. GCC fails on the first 2 asserts. GCC is the only one that fails on the 1st assert via not being captured. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/83167] decltype((x)) inside lambda is considered odr-use if x is not a reference [not found] <bug-83167-4@http.gcc.gnu.org/bugzilla/> 2021-08-07 19:34 ` [Bug c++/83167] decltype((x)) inside lambda is considered odr-use if x is not a reference pinskia at gcc dot gnu.org @ 2022-10-27 5:23 ` pinskia at gcc dot gnu.org 2023-12-08 21:57 ` cvs-commit at gcc dot gnu.org 2023-12-08 21:58 ` ppalka at gcc dot gnu.org 3 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-10-27 5:23 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83167 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- I might have seen a dup of this bug before. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/83167] decltype((x)) inside lambda is considered odr-use if x is not a reference [not found] <bug-83167-4@http.gcc.gnu.org/bugzilla/> 2021-08-07 19:34 ` [Bug c++/83167] decltype((x)) inside lambda is considered odr-use if x is not a reference pinskia at gcc dot gnu.org 2022-10-27 5:23 ` pinskia at gcc dot gnu.org @ 2023-12-08 21:57 ` cvs-commit at gcc dot gnu.org 2023-12-08 21:58 ` ppalka at gcc dot gnu.org 3 siblings, 0 replies; 4+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2023-12-08 21:57 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83167 --- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>: https://gcc.gnu.org/g:d9965fef40794d548021d2e34844e5fafeca4ce5 commit r14-6350-gd9965fef40794d548021d2e34844e5fafeca4ce5 Author: Patrick Palka <ppalka@redhat.com> Date: Fri Dec 8 16:57:13 2023 -0500 c++: decltype of (non-captured variable) [PR83167] For decltype((x)) within a lambda where x is not captured, we dubiously require that the lambda has a capture default, unlike for decltype(x). But according to [expr.prim.id.unqual]/3 we should just ignore the lambda in this case. This patch narrowly fixes this issue by disabling the capture_decltype handling and falling back to the ordinary handling when the innermost lambda has no capture-default. In fact, we can restrict the special handling to only by-copy lambdas since that's what [expr.prim.id.unqual]/3 is concerned with; for by-ref implicit captures both code paths should give the same result anyway. During review some other issues were discovered which are documented in a new FIXME. PR c++/83167 gcc/cp/ChangeLog: * semantics.cc (capture_decltype): Inline into its only caller ... (finish_decltype_type): ... here. Update nearby comment to refer to recent standard. Add FIXME. Restrict uncaptured variable type transformation to happen only for lambdas with a by-copy capture-default. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/lambda/lambda-decltype4.C: New test. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/83167] decltype((x)) inside lambda is considered odr-use if x is not a reference [not found] <bug-83167-4@http.gcc.gnu.org/bugzilla/> ` (2 preceding siblings ...) 2023-12-08 21:57 ` cvs-commit at gcc dot gnu.org @ 2023-12-08 21:58 ` ppalka at gcc dot gnu.org 3 siblings, 0 replies; 4+ messages in thread From: ppalka at gcc dot gnu.org @ 2023-12-08 21:58 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83167 Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |14.0 CC| |ppalka at gcc dot gnu.org Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org --- Comment #4 from Patrick Palka <ppalka at gcc dot gnu.org> --- Narrowly fixed for GCC 14, thanks for the bug report. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-12-08 21:58 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <bug-83167-4@http.gcc.gnu.org/bugzilla/> 2021-08-07 19:34 ` [Bug c++/83167] decltype((x)) inside lambda is considered odr-use if x is not a reference pinskia at gcc dot gnu.org 2022-10-27 5:23 ` pinskia at gcc dot gnu.org 2023-12-08 21:57 ` cvs-commit at gcc dot gnu.org 2023-12-08 21:58 ` ppalka at gcc dot gnu.org
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