https://github.com/evelez7 created https://github.com/llvm/llvm-project/pull/94674
Require a template argument list after a name prefixed by the template keyword in nested name specifiers. Addresses [CWG 96](https://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#96) which was superseded by [P1787](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p1787r6.html). Followup to #80801. >From 9eadf89be9550547ccaa16ebd61307e602466118 Mon Sep 17 00:00:00 2001 From: Erick Velez <erickvel...@gmail.com> Date: Tue, 4 Jun 2024 11:39:39 -0700 Subject: [PATCH] [clang] require arg list in type specifiers using template kw --- clang/lib/Parse/Parser.cpp | 12 +++++++++++- clang/test/Parser/cxx2a-concepts-requires-expr.cpp | 2 +- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp index 6d0cf7b174e50..71b87147e9a5f 100644 --- a/clang/lib/Parse/Parser.cpp +++ b/clang/lib/Parse/Parser.cpp @@ -2060,9 +2060,19 @@ bool Parser::TryAnnotateTypeOrScopeToken( return true; } + bool TemplateKWPresent = false; + if (Tok.is(tok::kw_template)) { + ConsumeToken(); + TemplateKWPresent = true; + } + TypeResult Ty; if (Tok.is(tok::identifier)) { - // FIXME: check whether the next token is '<', first! + if (TemplateKWPresent && NextToken().isNot(tok::less)) { + Diag(Tok.getLocation(), + diag::missing_template_arg_list_after_template_kw); + return true; + } Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS, *Tok.getIdentifierInfo(), Tok.getLocation()); diff --git a/clang/test/Parser/cxx2a-concepts-requires-expr.cpp b/clang/test/Parser/cxx2a-concepts-requires-expr.cpp index 971591afb08db..5755844a323d2 100644 --- a/clang/test/Parser/cxx2a-concepts-requires-expr.cpp +++ b/clang/test/Parser/cxx2a-concepts-requires-expr.cpp @@ -83,7 +83,7 @@ bool r23 = requires { typename identity<T>::temp<T>; }; template<typename T> bool r24 = requires { typename identity<T>::template temp<T>; - typename identity<T>::template temp; // expected-error{{expected an identifier or template-id after '::'}} + typename identity<T>::template temp; // expected-error{{template argument list is expected after a name prefixed by the template keyword}} }; bool r25 = requires { ; }; _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
