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* [Bug c++/105236] New: failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context @ 2022-04-12 6:01 cooky.ykooc922 at gmail dot com 2022-04-12 7:59 ` [Bug c++/105236] " jakub at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: cooky.ykooc922 at gmail dot com @ 2022-04-12 6:01 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105236 Bug ID: 105236 Summary: failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: cooky.ykooc922 at gmail dot com Target Milestone: --- Code: /// test_alias template <typename F> using test_alias = decltype([]{ return F{}; }()); /// test_temp template <typename F> struct test_temp { using type = decltype([]{ return F{}; }()); }; struct Custom {}; /// test template <typename F> void test() { // does not produce error in 'test_alias<Custom>' using return_type = test_alias<F>; return_type result; // compiles fine with: // 'test_alias<F> result;' } Expected Behavior: this should compile with no compilation error same as other compilers such as Clang, and MSVC Compilation Error Message: <source>: In function 'void test()': <source>:L:C: error: 'return_type' was not declared in this scope 18 | return_type result; Other workaround (with no compilation error): template <typename F> void test0() { using return_type = test_temp<F>::type; return_type result; } GCC Version: 12 (trunk) Additional Command Line: -std=c++20 Compiler Explorer Link: https://godbolt.org/z/TKWxfKjnY ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/105236] failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context 2022-04-12 6:01 [Bug c++/105236] New: failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context cooky.ykooc922 at gmail dot com @ 2022-04-12 7:59 ` jakub at gcc dot gnu.org 2022-11-08 23:20 ` pinskia at gcc dot gnu.org 2024-04-13 8:05 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: jakub at gcc dot gnu.org @ 2022-04-12 7:59 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105236 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2022-04-12 Status|UNCONFIRMED |NEW CC| |jakub at gcc dot gnu.org, | |ppalka at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- This is rejected this way since r9-4045-g0c1e0d63fe0ceabbd04384070f3b59f8bf50de09 when P0315R4 has been implemented (before it emitted more errors). ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/105236] failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context 2022-04-12 6:01 [Bug c++/105236] New: failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context cooky.ykooc922 at gmail dot com 2022-04-12 7:59 ` [Bug c++/105236] " jakub at gcc dot gnu.org @ 2022-11-08 23:20 ` pinskia at gcc dot gnu.org 2024-04-13 8:05 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-11-08 23:20 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105236 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |107430 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This might be a dup of another one of the lambda inside a decltype with an alias issue. There are definitely many bugs have been filed with a similar symptom. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107430 [Bug 107430] [meta-bug] lambda in decltype ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/105236] failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context 2022-04-12 6:01 [Bug c++/105236] New: failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context cooky.ykooc922 at gmail dot com 2022-04-12 7:59 ` [Bug c++/105236] " jakub at gcc dot gnu.org 2022-11-08 23:20 ` pinskia at gcc dot gnu.org @ 2024-04-13 8:05 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-04-13 8:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105236 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|NEW |RESOLVED Target Milestone|--- |14.0 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Fixed on the trunk for GCC 14 by the recent lambda template patches. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-04-13 8:06 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-04-12 6:01 [Bug c++/105236] New: failed lookup of alias with alias template of dependent template parameter containing lambda in unevaluated context cooky.ykooc922 at gmail dot com 2022-04-12 7:59 ` [Bug c++/105236] " jakub at gcc dot gnu.org 2022-11-08 23:20 ` pinskia at gcc dot gnu.org 2024-04-13 8:05 ` pinskia at gcc dot gnu.org
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