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PR c++/85305 - pack in lambda init-capture. 

* parser.c (cp_parser_initializer): Add subexpression_p parm; don't
	check_for_bare_parameter_packs in a subexpression.
	(cp_parser_lambda_introducer): Use it.

From-SVN: r259779
This commit is contained in:
Jason Merrill 2018-04-30 17:21:25 -04:00 committed by Jason Merrill
parent d6df811e5d
commit f026530a85
3 changed files with 17 additions and 4 deletions
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5
gcc/cp/ChangeLog
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@ -1,5 +1,10 @@
2018-04-30 Jason Merrill <jason@redhat.com> 2018-04-30 Jason Merrill <jason@redhat.com>
PR c++/85305 - pack in lambda init-capture.
* parser.c (cp_parser_initializer): Add subexpression_p parm; don't
check_for_bare_parameter_packs in a subexpression.
(cp_parser_lambda_introducer): Use it.
PR c++/61982 - dead stores to destroyed objects. PR c++/61982 - dead stores to destroyed objects.
* call.c (build_trivial_dtor_call): New, assigns a clobber. * call.c (build_trivial_dtor_call): New, assigns a clobber.
(build_over_call, build_special_member_call): Use it. (build_over_call, build_special_member_call): Use it.

8
gcc/cp/parser.c
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@ -2243,7 +2243,7 @@ static tree cp_parser_default_argument
static void cp_parser_function_body static void cp_parser_function_body
(cp_parser *, bool); (cp_parser *, bool);
static tree cp_parser_initializer static tree cp_parser_initializer
(cp_parser *, bool *, bool *); (cp_parser *, bool *, bool *, bool = false);
static cp_expr cp_parser_initializer_clause static cp_expr cp_parser_initializer_clause
(cp_parser *, bool *); (cp_parser *, bool *);
static cp_expr cp_parser_braced_list static cp_expr cp_parser_braced_list
@ -10358,7 +10358,7 @@ cp_parser_lambda_introducer (cp_parser* parser, tree lambda_expr)
"lambda capture initializers " "lambda capture initializers "
"only available with -std=c++14 or -std=gnu++14"); "only available with -std=c++14 or -std=gnu++14");
capture_init_expr = cp_parser_initializer (parser, &direct, capture_init_expr = cp_parser_initializer (parser, &direct,
&non_constant); &non_constant, true);
explicit_init_p = true; explicit_init_p = true;
if (capture_init_expr == NULL_TREE) if (capture_init_expr == NULL_TREE)
{ {
@ -21860,7 +21860,7 @@ cp_parser_ctor_initializer_opt_and_function_body (cp_parser *parser,
static tree static tree
cp_parser_initializer (cp_parser* parser, bool* is_direct_init, cp_parser_initializer (cp_parser* parser, bool* is_direct_init,
bool* non_constant_p) bool* non_constant_p, bool subexpression_p)
{ {
cp_token *token; cp_token *token;
tree init; tree init;
@ -21907,7 +21907,7 @@ cp_parser_initializer (cp_parser* parser, bool* is_direct_init,
init = error_mark_node; init = error_mark_node;
} }
if (check_for_bare_parameter_packs (init)) if (!subexpression_p && check_for_bare_parameter_packs (init))
init = error_mark_node; init = error_mark_node;
return init; return init;

8
gcc/testsuite/g++.dg/cpp1z/fold-lambda2.C Normal file
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@ -0,0 +1,8 @@
// PR c++/85305
// { dg-additional-options -std=c++17 }
template <int... Is>
void foo()
{
([i = Is]{}(), ...);
}