public void matchRange(int a, int b) throws MismatchedRangeException {
if (input.LA(1) < a || input.LA(1) > b) {
if (state.backtracking > 0) {
state.failed = true;
return;
}
MismatchedRangeException mre = new MismatchedRangeException(a, b, input);
recover(mre);
throw mre;
}
input.consume();
state.failed = false;
}
/** Return a token from this source; i.e., match a token on the char stream. */
public Token nextToken() {
while (true) {
state.token = null;
state.channel = Token.DEFAULT_CHANNEL;
state.tokenStartCharIndex = input.index();
state.tokenStartCharPositionInLine = input.getCharPositionInLine();
state.tokenStartLine = input.getLine();
state.text = null;
if (input.LA(1) == CharStream.EOF) {
Token eof =
new CommonToken(
(CharStream) input, Token.EOF, Token.DEFAULT_CHANNEL, input.index(), input.index());
eof.setLine(getLine());
eof.setCharPositionInLine(getCharPositionInLine());
return eof;
}
try {
mTokens();
if (state.token == null) {
emit();
} else if (state.token == Token.SKIP_TOKEN) {
continue;
}
return state.token;
} catch (NoViableAltException nva) {
reportError(nva);
recover(nva); // throw out current char and try again
} catch (RecognitionException re) {
reportError(re);
// match() routine has already called recover()
}
}
}
public void match(int c) throws MismatchedTokenException {
if (input.LA(1) != c) {
if (state.backtracking > 0) {
state.failed = true;
return;
}
MismatchedTokenException mte = new MismatchedTokenException(c, input);
recover(mte); // don't really recover; just consume in lexer
throw mte;
}
input.consume();
state.failed = false;
}
public void match(String s) throws MismatchedTokenException {
int i = 0;
while (i < s.length()) {
if (input.LA(1) != s.charAt(i)) {
if (state.backtracking > 0) {
state.failed = true;
return;
}
MismatchedTokenException mte = new MismatchedTokenException(s.charAt(i), input);
recover(mte);
throw mte;
}
i++;
input.consume();
state.failed = false;
}
}
