pt.c (determine_specialization): Give helpful error about missing "template<>".

	* pt.c (determine_specialization): Give helpful error about missing
	"template<>".

From-SVN: r154518

gcc/cp/ChangeLog

+2009-11-24  Jason Merrill  <jason@redhat.com>
+
+	* pt.c (determine_specialization): Give helpful error about missing
+	"template<>".
+
 2009-11-23  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/42095

gcc/cp/pt.c

@@ -1945,6 +1945,10 @@ determine_specialization (tree template_id,
     {
       error ("template-id %qD for %q+D does not match any template "
 	     "declaration", template_id, decl);
+      if (header_count && header_count != template_count + 1)
+	inform (input_location, "saw %d %<template<>%>, need %d for "
+		"specializing a member function template",
+		header_count, template_count + 1);
       return error_mark_node;
     }
   else if ((templates && TREE_CHAIN (templates))

gcc/testsuite/ChangeLog

+2009-11-23  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/template/spec15.C: Check for helpful message.
+
 2009-11-24  Janis Johnson  <janis187@us.ibm.com>
 
 	* gcc.target/powerpc/altivec-32.c: Don't use -m64.

gcc/testsuite/g++.dg/template/spec15.C

@@ -19,6 +19,7 @@ struct A<float> {
 };
 
 template <> void A<int>::f (int);                    // { dg-error "" }
+// { dg-message "need 2" "" { target *-*-* } 21 }
 template <> template <> void A<int>::f (int);
 
 template <> void A<int>::f2 (int);