From 077827189d358f788d062a1f504c99412a9de8fb Mon Sep 17 00:00:00 2001
From: Kriang Lerdsuwanakij <lerdsuwa@users.sourceforge.net>
Date: Sun, 19 May 2002 10:11:50 +0000
Subject: [PATCH] PR c++/186, DR 259

	PR c++/186, DR 259
	* pt.c (do_decl_instantiation): Don't complain explicit
	instantiation after explicit specialization.
	(do_type_instantiation): Likewise.

From-SVN: r53621
---
 gcc/cp/ChangeLog                              |  7 +++++
 gcc/cp/pt.c                                   | 31 +++++++++++--------
 .../g++.old-deja/g++.pt/explicit70.C          |  8 ++---
 gcc/testsuite/g++.old-deja/g++.pt/spec19.C    |  4 +--
 4 files changed, 31 insertions(+), 19 deletions(-)

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 56f76633e99..edf3b81a2f6 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,10 @@
+2002-05-19  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
+
+	PR c++/186, DR 259
+	* pt.c (do_decl_instantiation): Don't complain explicit
+	instantiation after explicit specialization.
+	(do_type_instantiation): Likewise.
+
 2002-05-19  Alexandre Oliva  <aoliva@redhat.com>
 
 	* cp-tree.h (complete_type_or_diagnostic): Changed prototype,
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 58fe3c57369..e54ab8e3ebc 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -9524,12 +9524,16 @@ do_decl_instantiation (declspecs, declarator, storage)
 
   if (DECL_TEMPLATE_SPECIALIZATION (result))
     {
-      /* [temp.spec]
+      /* DR 259 [temp.spec].
+
+	 Both an explicit instantiation and a declaration of an explicit
+	 specialization shall not appear in a program unless the explicit
+	 instantiation follows a declaration of the explicit specialization.
 
-	 No program shall both explicitly instantiate and explicitly
-	 specialize a template.  */
-      pedwarn ("explicit instantiation of `%#D' after", result);
-      cp_pedwarn_at ("explicit specialization here", result);
+	 For a given set of template parameters, if an explicit
+	 instantiation of a template appears after a declaration of an
+	 explicit specialization for that template, the explicit
+	 instantiation has no effect.  */
       return;
     }
   else if (DECL_EXPLICIT_INSTANTIATION (result))
@@ -9659,15 +9663,16 @@ do_type_instantiation (t, storage, complain)
 
   if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t))
     {
-      /* [temp.spec]
+      /* DR 259 [temp.spec].
 
-	 No program shall both explicitly instantiate and explicitly
-	 specialize a template.  */
-      if (complain & tf_error)
-	{
-	  error ("explicit instantiation of `%#T' after", t);
-	  cp_error_at ("explicit specialization here", t);
-	}
+	 Both an explicit instantiation and a declaration of an explicit
+	 specialization shall not appear in a program unless the explicit
+	 instantiation follows a declaration of the explicit specialization.
+
+	 For a given set of template parameters, if an explicit
+	 instantiation of a template appears after a declaration of an
+	 explicit specialization for that template, the explicit
+	 instantiation has no effect.  */
       return;
     }
   else if (CLASSTYPE_EXPLICIT_INSTANTIATION (t))
diff --git a/gcc/testsuite/g++.old-deja/g++.pt/explicit70.C b/gcc/testsuite/g++.old-deja/g++.pt/explicit70.C
index ade83fdc443..544faf7bdb2 100644
--- a/gcc/testsuite/g++.old-deja/g++.pt/explicit70.C
+++ b/gcc/testsuite/g++.old-deja/g++.pt/explicit70.C
@@ -28,14 +28,14 @@ template class S<void*>; // OK - explicit instantiation of partial
                          // specialization
 
 template <>
-struct S<long double> {};  // ERROR - explicit specialization
+struct S<long double> {};
 
-template class S<long double>; // ERROR - explicit instantiation after
+template class S<long double>; // OK - explicit instantiation after
 
 template <>
-void f(long double) {}        // ERROR - explicit specialization
+void f(long double) {}
 
-template void f(long double); // ERROR - explicit instantiation after
+template void f(long double); // OK - explicit instantiation after
 
 template <class T>
 void g(T);
diff --git a/gcc/testsuite/g++.old-deja/g++.pt/spec19.C b/gcc/testsuite/g++.old-deja/g++.pt/spec19.C
index f9b601125b4..911c6933da4 100644
--- a/gcc/testsuite/g++.old-deja/g++.pt/spec19.C
+++ b/gcc/testsuite/g++.old-deja/g++.pt/spec19.C
@@ -1,5 +1,5 @@
 // Build don't link:
 
 template<class T> T f(T o) { return o; }
-template<> int f(int o)    { return o; } // ERROR - after specialization
-template int f(int);  // ERROR - explicit instantiation
+template<> int f(int o)    { return o; }
+template int f(int);
-- 
2.30.2