From: Nathan Sidwell <nathan@acm.org>
Date: Thu, 12 Jan 2017 12:40:28 +0000 (+0000)
Subject: re PR c++/77812 (incorrectly rejects valid C++ code that uses enum in template instan... 
X-Git-Tag: releases/gcc-5.5.0~591
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=35995667c3eefd0332fdfc57b0c69dd31b89a0b3;p=thirdparty%2Fgcc.git

re PR c++/77812 (incorrectly rejects valid C++ code that uses enum in template instantiation)

	cp/
	PR c++/77812
	* name-lookup.c (set_namespace_binding_1): An overload of 1 decl
	is a new overload.

	testsuite/
	PR c++/77812
	* g++.dg/pr77812.C: New.

From-SVN: r244351
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 0fbbe2118bae..8a89f21051b0 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2017-01-12  Nathan Sidwell  <nathan@acm.org>
+
+	PR c++/77812
+	* name-lookup.c (set_namespace_binding_1): An overload of 1 decl
+	is a new overload.
+
 2016-12-08  Nathan Sidwell  <nathan@acm.org>
 
 	PR c++/78551
diff --git a/gcc/cp/name-lookup.c b/gcc/cp/name-lookup.c
index 9e4e0e3adf57..5c8d189e4ff2 100644
--- a/gcc/cp/name-lookup.c
+++ b/gcc/cp/name-lookup.c
@@ -3477,7 +3477,12 @@ set_namespace_binding_1 (tree name, tree scope, tree val)
   if (scope == NULL_TREE)
     scope = global_namespace;
   b = binding_for_name (NAMESPACE_LEVEL (scope), name);
-  if (!b->value || TREE_CODE (val) == OVERLOAD || val == error_mark_node)
+  if (!b->value
+      /* For templates and using we create a single element OVERLOAD.
+	 Look for the chain to know whether this is really augmenting
+	 an existing overload.  */
+      || (TREE_CODE (val) == OVERLOAD && OVL_CHAIN (val))
+      || val == error_mark_node)
     b->value = val;
   else
     supplement_binding (b, val);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d400de17da82..0b7c3da7d5ab 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-01-12  Nathan Sidwell  <nathan@acm.org>
+
+	PR c++/77812
+	* g++.dg/pr77812.C: New.
+
 2017-01-11  Andre Vieira <andre.simoesdiasvieira@arm.com>
 
 	Backport from mainline
diff --git a/gcc/testsuite/g++.dg/pr77812.C b/gcc/testsuite/g++.dg/pr77812.C
new file mode 100644
index 000000000000..94f17402a4e1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr77812.C
@@ -0,0 +1,18 @@
+// PR77812
+// struct-stat hack failure when first overload is a template
+
+enum f {};
+
+template <typename>
+void f ()
+{
+}
+enum f F;
+
+struct g {};
+
+template <typename>
+void g ()
+{
+}
+struct g G;