re PR c++/50080 ([DR 468] error: 'template' (as a disambiguator) is only allowed within templates)

/cp
2012-10-15  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/50080
	* parser.c (cp_parser_optional_template_keyword): Implement
	Core/468, allow outside template.

/testsuite
2012-10-15  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/50080
	* g++.dg/parse/tmpl-outside2.C: New.
	* g++.dg/parse/tmpl-outside1.C: Adjust.
	* g++.dg/template/qualttp18.C: Likewise.
	* g++.old-deja/g++.pt/memtemp87.C: Likewise.
	* g++.old-deja/g++.pt/overload13.C: Likewise.

From-SVN: r192465

gcc/cp/ChangeLog

+2012-10-15  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/50080
+	* parser.c (cp_parser_optional_template_keyword): Implement
+	Core/468, allow outside template.
+
 2012-10-14  Jason Merrill  <jason@redhat.com>
 	    Ville Voutilainen  <ville.voutilainen@gmail.com>
 

gcc/cp/parser.c

@@ -23252,29 +23252,10 @@ cp_parser_optional_template_keyword (cp_parser *parser)
 {
   if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
     {
-      /* The `template' keyword can only be used within templates;
-	 outside templates the parser can always figure out what is a
-	 template and what is not.  */
-      if (!processing_template_decl)
-	{
-	  cp_token *token = cp_lexer_peek_token (parser->lexer);
-	  error_at (token->location,
-		    "%<template%> (as a disambiguator) is only allowed "
-		    "within templates");
-	  /* If this part of the token stream is rescanned, the same
-	     error message would be generated.  So, we purge the token
-	     from the stream.  */
-	  cp_lexer_purge_token (parser->lexer);
-	  return false;
-	}
-      else
-	{
-	  /* Consume the `template' keyword.  */
-	  cp_lexer_consume_token (parser->lexer);
-	  return true;
-	}
+      /* Consume the `template' keyword.  */
+      cp_lexer_consume_token (parser->lexer);
+      return true;
     }
-
   return false;
 }
 

gcc/testsuite/ChangeLog

+2012-10-15  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/50080
+	* g++.dg/parse/tmpl-outside2.C: New.
+	* g++.dg/parse/tmpl-outside1.C: Adjust.
+	* g++.dg/template/qualttp18.C: Likewise.
+	* g++.old-deja/g++.pt/memtemp87.C: Likewise.
+	* g++.old-deja/g++.pt/overload13.C: Likewise.
+
 2012-10-15  Marc Glisse  <marc.glisse@inria.fr>
 
 	PR tree-optimization/54915

gcc/testsuite/g++.dg/parse/tmpl-outside1.C

@@ -7,4 +7,4 @@ struct X
    template <int i> struct Y {};
 };
 
-typedef X::template Y<0> y; // { dg-error "template|invalid" }
+typedef X::template Y<0> y;

gcc/testsuite/g++.dg/parse/tmpl-outside2.C

+// PR c++/50080
+
+template <typename T>
+struct A
+{
+  template <typename U>
+  struct B {};
+};
+
+template <typename T>
+void test()
+{
+  typename A<T>::template B<int> b;
+}
+
+int main()
+{
+  typename A<double>::template B<int> b;
+}

gcc/testsuite/g++.dg/template/qualttp18.C

@@ -14,7 +14,7 @@ template <template <class> class TT> struct X
 
 struct C
 {
-	X<A::template B> x; // { dg-error "" }
+	X<A::template B> x;
 };
 
 int main()

gcc/testsuite/g++.old-deja/g++.pt/memtemp87.C

@@ -12,5 +12,4 @@ public:
 template<template<class> class>
 class Y {
 };
-Q::template X<int> x; // { dg-error "" } template syntax
-
+Q::template X<int> x;

gcc/testsuite/g++.old-deja/g++.pt/overload13.C

@@ -7,5 +7,5 @@ struct A {
 int main ()
 {
   A a;
-  return a.template f (0); // { dg-error "" } 
+  return a.template f (0);
 }