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Subject: [Bug c++/82980] [9/10/11 Regression] template keyword should not be
 required for captured decl of the "base" type since r6-6866-gff2faafcf689b6c2
Date: Thu, 12 May 2022 20:14:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D82980

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:

https://gcc.gnu.org/g:dc8739c2ab14f0108e4fabbd565fa0918e4425ee

commit r11-9986-gdc8739c2ab14f0108e4fabbd565fa0918e4425ee
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Apr 14 08:16:45 2022 -0400

    c++: lambda and the current instantiation [PR82980]

    When a captured variable is type-dependent, we've expressed the type of=
 the
    capture field and proxy with a decltype variant.  But if the type is "t=
he
    current instantiation", we need to be able to see that so that we can do
    lookup inside it just like we could with the captured variable itself.

    I also tried looking through lambda capture in
    cp_parser_postfix_dot_deref_expression, but this way seems cleaner.  I =
plan
    to treat more types as deducible in stage 1.

    I considered also using this in do_auto_deduction, but think that would=
 be
    wrong: [temp.dep.expr] says an id-expression is type-dependent if it is
    "associated by name lookup with a variable declared with a type that
    contains a placeholder type where the initializer is type-dependent".  =
That
    doesn't clearly exclude deducing a dependent type from the initializer,=
 but
    it seems like a barrier, and other implementations agree.

            PR c++/82980

    gcc/cp/ChangeLog:

            * lambda.c (type_deducible_expression_p): New.
            (lambda_capture_field_type): Check it.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp0x/lambda/lambda-current-inst1.C: New test.=