re PR c++/29731 (ICE with statement expression as template parameter)

2006-12-31  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/29731
	* parser.c (cp_parser_primary_expression): Return error_mark_node when
	a statement-expression is found outside of a function body.

From-SVN: r120299

gcc/cp/ChangeLog

+2006-12-31  Simon Martin  <simartin@users.sourceforge.net>
+
+	PR c++/29731
+	* parser.c (cp_parser_primary_expression): Return error_mark_node when
+	a statement-expression is found outside of a function body.
+
 2006-12-28  Kazu Hirata  <kazu@codesourcery.com>
 
 	* cp-tree.h (TYPE_NAMESPACE_SCOPE_P, TYPE_FUNCTION_SCOPE_P):

gcc/cp/parser.c

@@ -3024,13 +3024,20 @@ cp_parser_primary_expression (cp_parser *parser,
 
 	       at class or namespace scope.  */
 	    if (!parser->in_function_body)
-	      error ("statement-expressions are allowed only inside functions");
-	    /* Start the statement-expression.  */
-	    expr = begin_stmt_expr ();
-	    /* Parse the compound-statement.  */
-	    cp_parser_compound_statement (parser, expr, false);
-	    /* Finish up.  */
-	    expr = finish_stmt_expr (expr, false);
+	      {
+		error ("statement-expressions are allowed only inside functions");
+		cp_parser_skip_to_end_of_block_or_statement (parser);
+		expr = error_mark_node;
+	      }
+	    else
+	      {
+		/* Start the statement-expression.  */
+		expr = begin_stmt_expr ();
+		/* Parse the compound-statement.  */
+		cp_parser_compound_statement (parser, expr, false);
+		/* Finish up.  */
+		expr = finish_stmt_expr (expr, false);
+	      }
 	  }
 	else
 	  {

gcc/testsuite/ChangeLog

+2006-12-31  Simon Martin  <simartin@users.sourceforge.net>
+
+	PR c++/29731
+	* g++.dg/parse/template22.C: New test.
+
 2006-12-31  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/30338

gcc/testsuite/g++.dg/parse/template22.C

+/* PR c++/29731. This used to ICE in uses_template_parms. */
+
+template<int> struct A {};
+
+A<({})> a; /* { dg-error "forbids braced-groups within expressions|statement-expressions|template argument 1 is invalid|invalid type" } */