From 0c8bfdbc0cf0ef6644da218eeb1e816f952f963f Mon Sep 17 00:00:00 2001
From: Mark Mitchell <mark@markmitchell.com>
Date: Tue, 1 Sep 1998 09:56:40 +0000
Subject: [PATCH] * decl2.c (arg_assoc): Handle template-id expressions as
 arguments.

From-SVN: r22156
---
 gcc/cp/ChangeLog                            |  4 ++
 gcc/cp/decl2.c                              | 68 +++++++++++++++++++--
 gcc/testsuite/g++.old-deja/g++.pt/crash24.C | 11 ++++
 3 files changed, 79 insertions(+), 4 deletions(-)
 create mode 100644 gcc/testsuite/g++.old-deja/g++.pt/crash24.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 4e17539b35b..37c16b3f6cf 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,7 @@
+1998-09-01  Mark Mitchell  <mark@markmitchell.com>
+
+	* decl2.c (arg_assoc): Handle template-id expressions as arguments.
+
 1998-08-31  Mark Mitchell  <mark@markmitchell.com>
 
 	* decl.c (finish_enum): Handle member enums of classes declared in
diff --git a/gcc/cp/decl2.c b/gcc/cp/decl2.c
index 04424bf147c..7d54deca6f6 100644
--- a/gcc/cp/decl2.c
+++ b/gcc/cp/decl2.c
@@ -4583,11 +4583,71 @@ arg_assoc (k, n)
   while (TREE_CODE (n) == TREE_LIST)
     n = TREE_VALUE (n);
 
-  my_friendly_assert (TREE_CODE (n) == OVERLOAD, 980715);
+  if (TREE_CODE (n) == TEMPLATE_ID_EXPR)
+    {
+      /* [basic.lookup.koenig]
 
-  for (; n; n = TREE_CHAIN (n))
-    if (arg_assoc (k, OVL_FUNCTION (n)))
-      return 1;
+	 If T is a template-id, its associated namespaces and classes
+	 are the namespace in which the template is defined; for
+	 member templates, the member template's class; the namespaces
+	 and classes associated with the types of the template
+	 arguments provided for template type parameters (excluding
+	 template template parameters); the namespaces in which any
+	 template template arguments are defined; and the classes in
+	 which any member templates used as template template
+	 arguments are defined.  [Note: non-type template arguments do
+	 not contribute to the set of associated namespaces.  ]   */
+      tree template = TREE_OPERAND (n, 0);
+      tree args = TREE_OPERAND (n, 1);
+      tree ctx;
+      tree arg;
+
+      /* First, the template.  There may actually be more than one if
+	 this is an overloaded function template.  But, in that case,
+	 we only need the first; all the functions will be in the same
+	 namespace.  */
+      template = OVL_CURRENT (template);
+
+      ctx = CP_DECL_CONTEXT (template);
+       
+      if (TREE_CODE (ctx) == NAMESPACE_DECL)
+	{
+	  if (arg_assoc_namespace (k, ctx) == 1)
+	    return 1;
+	}
+      /* It must be a member template.  */
+      else if (arg_assoc_class (k, ctx) == 1)
+	return 1;
+
+      /* Now the arguments.  */
+      for (arg = args; arg != NULL_TREE; arg = TREE_CHAIN (arg))
+	{
+	  tree t = TREE_VALUE (arg);
+
+	  if (TREE_CODE (t) == TEMPLATE_DECL)
+	    {
+	      ctx = CP_DECL_CONTEXT (t);
+	      if (TREE_CODE (ctx) == NAMESPACE_DECL)
+		{
+		  if (arg_assoc_namespace (k, ctx) == 1)
+		    return 1;
+		}
+	      else if (arg_assoc_class (k, ctx) == 1)
+		return 1;
+	    }
+	  else if (TREE_CODE_CLASS (TREE_CODE (t)) == 't'
+		   && arg_assoc_type (t) == 1)
+	    return 1;
+	}
+    }
+  else
+    {
+      my_friendly_assert (TREE_CODE (n) == OVERLOAD, 980715);
+      
+      for (; n; n = OVL_CHAIN (n))
+	if (arg_assoc (k, OVL_FUNCTION (n)))
+	  return 1;
+    }
 
   return 0;
 }
diff --git a/gcc/testsuite/g++.old-deja/g++.pt/crash24.C b/gcc/testsuite/g++.old-deja/g++.pt/crash24.C
new file mode 100644
index 00000000000..442ab59830c
--- /dev/null
+++ b/gcc/testsuite/g++.old-deja/g++.pt/crash24.C
@@ -0,0 +1,11 @@
+// Build don't link:
+
+template<typename T, template <class> class U> void template_fn (T);
+template<typename T, typename U> void callme ( void (*)(T));
+
+template<typename T> struct S1;
+
+int main()
+{
+  callme( template_fn<double, S1>); // ERROR - no matching function
+}