[Bug c++/106784] Add __is_convertible built-in
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Mon Sep 26 16:42:25 GMT 2022
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106784
--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Marek Polacek <mpolacek@gcc.gnu.org>:
https://gcc.gnu.org/g:be4b32b9ef69b86b662cb7511b48cd1048a55403
commit r13-2879-gbe4b32b9ef69b86b662cb7511b48cd1048a55403
Author: Marek Polacek <polacek@redhat.com>
Date: Mon Sep 26 10:21:38 2022 -0400
c++: Instantiate less when evaluating __is_convertible
Jon reported that evaluating __is_convertible in a test led to
instantiating something ill-formed and so we failed to compile the test.
__is_convertible doesn't and shouldn't need to instantiate so much, so
let's limit it with a cp_unevaluated guard. Use a helper function to
implement both built-ins.
PR c++/106784
gcc/cp/ChangeLog:
* method.cc (is_convertible_helper): New.
(is_convertible): Use it.
(is_nothrow_convertible): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/is_convertible3.C: New test.
* g++.dg/ext/is_nothrow_convertible3.C: New test.
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