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PR c++/88538 - braced-init-list in template-argument-list.

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* parser.c (cp_parser_template_argument): Handle braced-init-list when
	in C++20.

	* g++.dg/cpp2a/nontype-class11.C: New test.

From-SVN: r267741
This commit is contained in:
Marek Polacek 2019-01-08 22:33:04 +00:00 committed by Marek Polacek
parent 7e55f2d868
commit 96e768c3fe
4 changed files with 38 additions and 0 deletions
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4
gcc/cp/ChangeLog
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@ -1,5 +1,9 @@
2019-01-08 Marek Polacek <polacek@redhat.com>
PR c++/88538 - braced-init-list in template-argument-list.
* parser.c (cp_parser_template_argument): Handle braced-init-list when
in C++20.
PR c++/88548 - this accepted in static member functions.
* parser.c (cp_debug_parser): Adjust printing of
local_variables_forbidden_p.

8
gcc/cp/parser.c
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@ -17026,6 +17026,14 @@ cp_parser_template_argument (cp_parser* parser)
argument = cp_parser_constant_expression (parser);
else
{
/* In C++20, we can encounter a braced-init-list. */
if (cxx_dialect >= cxx2a
&& cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
{
bool expr_non_constant_p;
return cp_parser_braced_list (parser, &expr_non_constant_p);
}
/* With C++17 generalized non-type template arguments we need to handle
lvalue constant expressions, too. */
argument = cp_parser_assignment_expression (parser);

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2019-01-08 Marek Polacek <polacek@redhat.com>
PR c++/88538 - braced-init-list in template-argument-list.
* g++.dg/cpp2a/nontype-class11.C: New test.
2019-01-08 Jakub Jelinek <jakub@redhat.com>
PR target/88457

21
gcc/testsuite/g++.dg/cpp2a/nontype-class11.C Normal file
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@ -0,0 +1,21 @@
// PR c++/88538
// { dg-do compile { target c++2a } }
struct S {
unsigned a;
unsigned b;
constexpr S(unsigned _a, unsigned _b) noexcept: a{_a}, b{_b} { }
};
template <S p>
void fnc()
{
}
template<S s> struct X { };
void f()
{
fnc<{10,20}>();
X<{1, 2}> x;
}