[PATCH] c++: Template keyword following :: [PR96082]

[Marek Polacek via Gcc-patches]

In r9-4235 I tried to make sure that the template keyword follows
a nested-name-specifier.  :: is a valid nested-name-specifier, so
I also have to check 'globalscope' before giving the error.

Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk/10/9?

gcc/cp/ChangeLog:

        PR c++/96082
        * parser.c (cp_parser_elaborated_type_specifier): Allow
        'template' following ::.

gcc/testsuite/ChangeLog:

        PR c++/96082
        * g++.dg/template/template-keyword3.C: New test.
---
 gcc/cp/parser.c                                   |  2 +-
 gcc/testsuite/g++.dg/template/template-keyword3.C | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/template/template-keyword3.C

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index ab088874ba7..3782edd429e 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -18826,7 +18826,7 @@ cp_parser_elaborated_type_specifier (cp_parser* parser,
       if (!template_p)
        cp_parser_parse_tentatively (parser);
       /* The `template' keyword must follow a nested-name-specifier.  */
-      else if (!nested_name_specifier)
+      else if (!nested_name_specifier && !globalscope)
        {
          cp_parser_error (parser, "%<template%> must follow a nested-"
                           "name-specifier");
diff --git a/gcc/testsuite/g++.dg/template/template-keyword3.C 
b/gcc/testsuite/g++.dg/template/template-keyword3.C
new file mode 100644
index 00000000000..91af2b3dc02
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/template-keyword3.C
@@ -0,0 +1,11 @@
+// PR c++/96082
+// { dg-do compile { target c++11 } }
+
+template <class> class A {};
+
+void
+f ()
+{ 
+  typename::template A <int> a;
+  ::template A <int> a2;
+}

base-commit: 7bd72dd5a385dfa6d49cfe640cefc9ed187361d3
-- 
2.26.2