/** @return The position of the beginning of the current token. */
public int getPosition() {
return lexer.getPosition();
}
private void nextToken() throws ParseException, IOException {
token = lexer.yylex();
if (token == null) token = new Yytoken(Yytoken.TYPE_EOF, null);
}
/**
* Reset the parser to the initial state with a new character reader.
*
* @param in - The new character reader.
* @throws IOException
* @throws ParseException
*/
public void reset(Reader in) {
lexer.yyreset(in);
reset();
}
public void testYylex() throws Exception {
String s = "\"\\/\"";
System.out.println(s);
StringReader in = new StringReader(s);
Yylex lexer = new Yylex(in);
Yytoken token = lexer.yylex();
assertEquals(Yytoken.TYPE_VALUE, token.type);
assertEquals("/", token.value);
s = "\"abc\\/\\r\\b\\n\\t\\f\\\\\"";
System.out.println(s);
in = new StringReader(s);
lexer = new Yylex(in);
token = lexer.yylex();
assertEquals(Yytoken.TYPE_VALUE, token.type);
assertEquals("abc/\r\b\n\t\f\\", token.value);
s = "[\t \n\r\n{ \t \t\n\r}";
System.out.println(s);
in = new StringReader(s);
lexer = new Yylex(in);
token = lexer.yylex();
assertEquals(Yytoken.TYPE_LEFT_SQUARE, token.type);
token = lexer.yylex();
assertEquals(Yytoken.TYPE_LEFT_BRACE, token.type);
token = lexer.yylex();
assertEquals(Yytoken.TYPE_RIGHT_BRACE, token.type);
s = "\b\f{";
System.out.println(s);
in = new StringReader(s);
lexer = new Yylex(in);
ParseException err = null;
try {
token = lexer.yylex();
} catch (ParseException e) {
err = e;
System.out.println("error:" + err);
assertEquals(ParseException.ERROR_UNEXPECTED_CHAR, e.getErrorType());
assertEquals(0, e.getPosition());
assertEquals(new Character('\b'), e.getUnexpectedObject());
} catch (IOException ie) {
throw ie;
}
assertTrue(err != null);
s = "{a : b}";
System.out.println(s);
in = new StringReader(s);
lexer = new Yylex(in);
err = null;
try {
lexer.yylex();
token = lexer.yylex();
} catch (ParseException e) {
err = e;
System.out.println("error:" + err);
assertEquals(ParseException.ERROR_UNEXPECTED_CHAR, e.getErrorType());
assertEquals(new Character('a'), e.getUnexpectedObject());
assertEquals(1, e.getPosition());
} catch (IOException ie) {
throw ie;
}
assertTrue(err != null);
}