t010lexer.html - Android社区 - https://www.androidos.net.cn/

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<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<title>t010lexer</title>

<!-- ANTLR includes -->
<script type="text/javascript" src="../../lib/antlr3-all.js"></script>
<script type="text/javascript" src="t010lexer.js"></script>

<!-- JsUnit include -->
<script type="text/javascript" src="../jsunit/app/jsUnitCore.js"></script>

<!-- Test Code -->
<script type="text/javascript">
    function TLexer() {
        TLexer.superclass.constructor.apply(this, arguments);
    }
    org.antlr.lang.extend(TLexer, t010lexer, {
        reportError: function(re) {
            /* don't recover, just crash */
            throw re;
        }
    });

    function testValid() {
        var stream = new org.antlr.runtime.ANTLRStringStream("foobar _Ab98 \n A12sdf"),

            lexer = new TLexer(stream),
            token;

        token = lexer.nextToken();
        assertEquals(token.getType(), lexer.IDENTIFIER);
        assertEquals(token.getStartIndex(), 0);
        assertEquals(token.getStopIndex(), 5);
        assertEquals(token.getText(), "foobar");

        token = lexer.nextToken();
        assertEquals(token.getType(), lexer.WS);
        assertEquals(token.getStartIndex(), 6);
        assertEquals(token.getStopIndex(), 6);
        assertEquals(token.getText(), ' ');

        token = lexer.nextToken();
        assertEquals(token.getType(), lexer.IDENTIFIER);
        assertEquals(token.getStartIndex(), 7);
        assertEquals(token.getStopIndex(), 11);
        assertEquals(token.getText(), '_Ab98');

        token = lexer.nextToken();
        assertEquals(token.getType(), lexer.WS);
        assertEquals(token.getStartIndex(), 12);
        assertEquals(token.getStopIndex(), 14);
        assertEquals(token.getText(), " \n ");

        token = lexer.nextToken();
        assertEquals(token.getType(), lexer.IDENTIFIER);
        assertEquals(token.getStartIndex(), 15);
        assertEquals(token.getStopIndex(), 20);
        assertEquals(token.getText(), 'A12sdf');

        token = lexer.nextToken();
        assertEquals(token.getType(), lexer.EOF);
    }

    function testMalformedInput() {
        var stream = new org.antlr.runtime.ANTLRStringStream('a-b'),
            lexer = new TLexer(stream),
            token;

        lexer.nextToken();
        try {
            token = lexer.nextToken();
            fail("nextToken should have thrown error on invalid input");
        } catch (e) {
            assert(e instanceof org.antlr.runtime.NoViableAltException);
            assertEquals(e.getUnexpectedType(), '-');
            assertEquals(e.charPositionInLine, 1);
            assertEquals(e.line, 1);
        }
    }
</script>

</head>
<body>
    <h1>t010lexer</h1>
</body>