selectors support for hash

lexer/lexer.go

@@ -107,6 +107,8 @@ func (l *Lexer) NextToken() token.Token {
 		tok = newToken(token.SEMICOLON, l.ch)
 	case ',':
 		tok = newToken(token.COMMA, l.ch)
+	case '.':
+		tok = newToken(token.DOT, l.ch)
 	case '(':
 		tok = newToken(token.LPAREN, l.ch)
 	case ')':

lexer/lexer_test.go

@@ -32,7 +32,7 @@ func TestNextToken(t *testing.T) {
 				"foo bar"
 				[1, 2];
 				{"foo": "bar"}
-				"foo \"bar\""
+				d.foo
 			`
 
 	tests := []struct {
@@ -138,7 +138,9 @@ func TestNextToken(t *testing.T) {
 		{token.COLON, ":"},
 		{token.STRING, "bar"},
 		{token.RBRACE, "}"},
-		{token.STRING, "foo \"bar\""},
+		{token.IDENT, "d"},
+		{token.DOT, "."},
+		{token.IDENT, "foo"},
 		{token.EOF, ""},
 	}