typeck.c (build_x_unary_op): Handle pointer-to-member.

cp/
	* typeck.c (build_x_unary_op): Handle pointer-to-member.

testsuite/
	* g++.dg/README (Subdirectories): Document new subdir expr.
	* g++.dg/expr/pmf-1.C: New test.

From-SVN: r56082

gcc/cp/ChangeLog

@@ -1,3 +1,7 @@
+2002-08-06  Gabriel Dos Reis  <gdr@nerim.net>
+
+	* typeck.c (build_x_unary_op): Handle pointer-to-member.
+
 2002-08-05  Geoffrey Keating  <geoffk@redhat.com>
 
 	* class.c: Don't include obstack.h.

gcc/cp/typeck.c

@@ -3794,6 +3794,25 @@ build_x_unary_op (code, xarg)
     }
   if (code == ADDR_EXPR)
     {
+      /*  A pointer to member-function can be formed only by saying
+	  &X::mf.  */
+      if (!flag_ms_extensions && TREE_CODE (TREE_TYPE (xarg)) == METHOD_TYPE
+	  && (TREE_CODE (xarg) != OFFSET_REF || !PTRMEM_OK_P (xarg)))
+	{
+	  if (TREE_CODE (xarg) != OFFSET_REF)
+	    {
+	      error ("invalid use of '%E' to form a pointer-to-member-function.  Use a qualified-id.",
+		     xarg);
+	      return error_mark_node;
+	    }
+	  else
+	    {
+	      error ("parenthesis around '%E' cannot be used to form a pointer-to-member-function",
+		     xarg);
+	      PTRMEM_OK_P (xarg) = 1;
+	    }
+	}
+      
       if (TREE_CODE (xarg) == OFFSET_REF)
         {
           ptrmem = PTRMEM_OK_P (xarg);

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2002-08-07  Gabriel Dos Reis  <gdr@nerim.net>
+
+	* g++.dg/README (Subdirectories): Document new subdir expr.
+	* g++.dg/expr/pmf-1.C: New test.
+
 2002-08-06  Neil Booth  <neil@daikokuya.co.uk>
 
 	* gcc.dg/cpp/vararg3.c, gcc.dg/cpp/vararg4.c: New tests.

gcc/testsuite/g++.dg/README

@@ -2,6 +2,7 @@ Subdirectories:
 
 abi	 Tests for ABI compatibility -- mangling, object layout, etc.
 eh	 Tests for exception handling.
+expr     Tests for expressions.
 ext	 Tests for GNU language extensions.
 inherit	 Tests for inheritance -- virtual functions, multiple inheritance, etc.
 init	 Tests for initialization semantics, constructors/destructors, etc.

gcc/testsuite/g++.dg/expr/pmf-1.C

@@ -0,0 +1,19 @@
+// C++ PR/2521
+// Copyright (C) 2002 Free Software Foundation
+// Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net>
+
+// { dg-do compile }
+
+struct A 
+{
+  void f();
+  void foo(void (A::*)(int));       // { dg-error "candidate" "" }
+  template<typename T>
+    void g(T);
+  void h()
+  {
+    void (A::*p)() = &A::f;
+    void (A::*q)() = &(A::f);       // { dg-error "parenthesis" "" }
+    foo(&g<int>);                   // { dg-error "" "" }
+  }
+};