C++ PATCH for c++/48935 (ICE with invalid enum scope)

[Jason Merrill <jason@redhat.com>]

[-- Attachment #1: Type: text/plain, Size: 316 bytes --]

Checking constructor_name_p doesn't work for an enum, and there's no 
reason to check it for non-classes anyway.  The change to 
cp_parser_invalid_type_name is to avoid saying that a scoped enum is a 
class; now it will print the actual tag used in defining the type.

Tested x86_64-pc-linux-gnu, applying to trunk.

[-- Attachment #2: 48935.patch --]
[-- Type: text/x-patch, Size: 3680 bytes --]

commit bef993e717fdccbde6acd7bde7aed2770cc1a95f
Author: Jason Merrill <jason@redhat.com>
Date:   Wed May 25 01:44:53 2011 -0400

    	PR c++/48935
    	* parser.c (cp_parser_constructor_declarator_p): Don't check
    	constructor_name_p for enums.
    	(cp_parser_diagnose_invalid_type_name): Correct error message.

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 3493e44..db2cb96 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -2534,7 +2534,7 @@ cp_parser_diagnose_invalid_type_name (cp_parser *parser,
 		  "%qT is a dependent scope",
 		  parser->scope, id, parser->scope);
       else if (TYPE_P (parser->scope))
-	error_at (location, "%qE in class %qT does not name a type",
+	error_at (location, "%qE in %q#T does not name a type",
 		  id, parser->scope);
       else
 	gcc_unreachable ();
@@ -19589,7 +19589,7 @@ cp_parser_constructor_declarator_p (cp_parser *parser, bool friend_p)
   /* If we have a class scope, this is easy; DR 147 says that S::S always
      names the constructor, and no other qualified name could.  */
   if (constructor_p && nested_name_specifier
-      && TYPE_P (nested_name_specifier))
+      && CLASS_TYPE_P (nested_name_specifier))
     {
       tree id = cp_parser_unqualified_id (parser,
 					  /*template_keyword_p=*/false,
diff --git a/gcc/testsuite/g++.dg/cpp0x/enum16.C b/gcc/testsuite/g++.dg/cpp0x/enum16.C
new file mode 100644
index 0000000..ebb4868
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/enum16.C
@@ -0,0 +1,6 @@
+// PR c++/48935
+// { dg-options -std=c++0x }
+
+enum class ENUM { a };
+
+ENUM::Type func() { return ENUM::a; } // { dg-error "does not name a type" }
diff --git a/gcc/testsuite/g++.dg/parse/error15.C b/gcc/testsuite/g++.dg/parse/error15.C
index 2352193..607a1db 100644
--- a/gcc/testsuite/g++.dg/parse/error15.C
+++ b/gcc/testsuite/g++.dg/parse/error15.C
@@ -12,7 +12,7 @@ namespace N
 
 N::A f2;              // { dg-error "1:invalid use of template-name 'N::A' without an argument list" }
 N::INVALID f3;        // { dg-error "1:'INVALID' in namespace 'N' does not name a type" }
-N::C::INVALID f4;     // { dg-error "1:'INVALID' in class 'N::C' does not name a type" }
+N::C::INVALID f4;     // { dg-error "1:'INVALID' in 'struct N::C' does not name a type" }
 N::K f6;              // { dg-error "1:'K' in namespace 'N' does not name a type" }
 typename N::A f7;
 // { dg-error "13:invalid use of template-name 'N::A' without an argument list" "13" { target *-*-* } 17 }
@@ -22,7 +22,7 @@ struct B
 {
   N::A f2;            // { dg-error "3:invalid use of template-name 'N::A' without an argument list" }
   N::INVALID f3;      // { dg-error "3:'INVALID' in namespace 'N' does not name a type" }
-  N::C::INVALID f4;   // { dg-error "3:'INVALID' in class 'N::C' does not name a type" }
+  N::C::INVALID f4;   // { dg-error "3:'INVALID' in 'struct N::C' does not name a type" }
   N::K f6;            // { dg-error "3:'K' in namespace 'N' does not name a type" }
   typename N::A f7;
 // { dg-error "15:invalid use of template-name 'N::A' without an argument list" "15" { target *-*-* } 27 }
@@ -33,7 +33,7 @@ struct C
 {
   N::A f2;            // { dg-error "3:invalid use of template-name 'N::A' without an argument list" }
   N::INVALID f3;      // { dg-error "3:'INVALID' in namespace 'N' does not name a type" }
-  N::C::INVALID f4;   // { dg-error "3:'INVALID' in class 'N::C' does not name a type" }
+  N::C::INVALID f4;   // { dg-error "3:'INVALID' in 'struct N::C' does not name a type" }
   N::K f6;            // { dg-error "3:'K' in namespace 'N' does not name a type" }
   typename N::A f7;   // { dg-error "15:invalid use of template-name 'N::A' without an argument list" }
 };