gotype: support for more tests, added one new test

also: minor fix to parser

Note: gotest won't run the gotype test yet until
it permits TestXXX functions where XXX is empty.

R=r
CC=golang-dev
https://golang.org/cl/4300053

src/cmd/gotype/gotype_test.go

@@ -20,21 +20,41 @@ func testImporter(importPath string) (string, *ast.Scope, os.Error) {
 }
 
 
-func testDir(t *testing.T, dir, pkg string) {
+func runTest(t *testing.T, path, pkg string) {
 	exitCode = 0
 	*pkgName = pkg
 	*recursive = false
 	importer = testImporter
-	processDirectory(dir)
+
+	if pkg == "" {
+		processFiles([]string{path}, true)
+	} else {
+		processDirectory(path)
+	}
+
 	if exitCode != 0 {
-		t.Errorf("processing %s failed: exitCode = %d", dir, exitCode)
+		t.Errorf("processing %s failed: exitCode = %d", path, exitCode)
 	}
 }
 
 
+var tests = []struct {
+	path string
+	pkg  string
+}{
+	// individual files
+	{"testdata/test1.go", ""},
+
+	// directories
+	{filepath.Join(runtime.GOROOT(), "src/pkg/go/ast"), "ast"},
+	{filepath.Join(runtime.GOROOT(), "src/pkg/go/token"), "scanner"},
+	{filepath.Join(runtime.GOROOT(), "src/pkg/go/scanner"), "scanner"},
+	{filepath.Join(runtime.GOROOT(), "src/pkg/go/parser"), "parser"},
+}
+
+
 func Test(t *testing.T) {
-	testDir(t, filepath.Join(runtime.GOROOT(), "src/pkg/go/ast"), "ast")
-	testDir(t, filepath.Join(runtime.GOROOT(), "src/pkg/go/token"), "scanner")
-	testDir(t, filepath.Join(runtime.GOROOT(), "src/pkg/go/scanner"), "scanner")
-	testDir(t, filepath.Join(runtime.GOROOT(), "src/pkg/go/parser"), "parser")
+	for _, test := range tests {
+		runTest(t, test.path, test.pkg)
+	}
 }

src/cmd/gotype/testdata/test1.go

+package p
+
+func _() {
+	// the scope of a local type declaration starts immediately after the type name
+	type T struct{ _ *T }
+}

src/pkg/go/parser/parser.go

@@ -332,7 +332,7 @@ func (p *parser) next() {
 		var endline int
 
 		if p.file.Line(p.pos) == line {
-			// The comment is on same line as previous token; it
+			// The comment is on same line as the previous token; it
 			// cannot be a lead comment but may be a line comment.
 			comment, endline = p.consumeCommentGroup()
 			if p.file.Line(p.pos) != endline {
@@ -2021,11 +2021,12 @@ func parseTypeSpec(p *parser, doc *ast.CommentGroup, _ int) ast.Spec {
 	// at the identifier in the TypeSpec and ends at the end of the innermost
 	// containing block.
 	// (Global identifiers are resolved in a separate phase after parsing.)
-	spec := &ast.TypeSpec{doc, ident, nil, p.lineComment}
+	spec := &ast.TypeSpec{doc, ident, nil, nil}
 	p.declare(spec, p.topScope, ast.Typ, ident)
 
 	spec.Type = p.parseType()
 	p.expectSemi() // call before accessing p.linecomment
+	spec.Comment = p.lineComment
 
 	return spec
 }