- ast.FilterExports: filter non-exported anonymous fields

- fixed typo in parser.go
- removed test w/ syntax errors from gofmt test script

R=rsc
DELTA=25  (21 added, 0 deleted, 4 changed)
OCL=31296
CL=31298

src/cmd/gofmt/test.sh

@@ -34,7 +34,7 @@ apply1() {
 	test_errors.go | calc.go | method1.go | selftest1.go | func3.go | const2.go | \
 	bug014.go | bug025.go | bug029.go | bug032.go | bug039.go | bug040.go | bug050.go |  bug068.go | \
 	bug088.go | bug083.go | bug106.go | bug121.go | bug125.go | bug126.go | bug132.go | bug133.go | \
-	bug134.go | bug160.go | bug166.go ) ;;
+	bug134.go | bug160.go | bug163.go | bug166.go ) ;;
 	* ) $1 $2; count $F;;
 	esac
 }

src/pkg/go/ast/filter.go

@@ -22,6 +22,23 @@ func filterIdentList(list []*Ident) []*Ident {
 }
 
 
+// isExportedType assumes that typ is a correct type.
+func isExportedType(typ Expr) bool {
+	switch t := typ.(type) {
+	case *Ident:
+		return t.IsExported();
+	case *ParenExpr:
+		return isExportedType(t.X);
+	case *SelectorExpr:
+		// assume t.X is a typename
+		return t.Sel.IsExported();
+	case *StarExpr:
+		return isExportedType(t.X);
+	}
+	return false;
+}
+
+
 func filterType(typ Expr)
 
 func filterFieldList(list []*Field) []*Field {
@@ -30,8 +47,12 @@ func filterFieldList(list []*Field) []*Field {
 		exported := false;
 		if len(f.Names) == 0 {
 			// anonymous field
-			// TODO(gri) check if the type is exported for anonymous field
+			// (Note that a non-exported anonymous field
-			exported = true;
+			// may still refer to a type with exported
+			// fields, so this is not absolutely correct.
+			// However, this cannot be done w/o complete
+			// type information.)
+			exported = isExportedType(f.Type);
 		} else {
 			f.Names = filterIdentList(f.Names);
 			exported = len(f.Names) > 0;

src/pkg/go/parser/parser.go

@@ -1094,7 +1094,7 @@ func (p *parser) parseCompositeLit(typ ast.Expr) ast.Expr {
 
 // TODO Consider different approach to checking syntax after parsing:
 //      Provide a arguments (set of flags) to parsing functions
-//      restricting what they are syupposed to accept depending
+//      restricting what they are supposed to accept depending
 //      on context.
 
 // checkExpr checks that x is an expression (and not a type).