/**
* Checks if the next token(s) in the parser matches this
* token sequence.
*
* @param parser the parser to check
*
* @return true if the next tokens are in the sequence, or
* false otherwise
*/
public bool IsNext(Parser parser) {
Token token;
int id;
for (int i = 0; i < tokens.Count; i++) {
id = (int) tokens[i];
token = parser.PeekToken(i);
if (token == null || token.Id != id) {
return false;
}
}
return true;
}
/**
* Checks if the next token(s) in the parser matches this
* token sequence.
*
* @param parser the parser to check
* @param length the maximum number of tokens to check
*
* @return true if the next tokens are in the sequence, or
* false otherwise
*/
public bool IsNext(Parser parser, int length) {
Token token;
int id;
if (length > tokens.Count) {
length = tokens.Count;
}
for (int i = 0; i < length; i++) {
id = (int) tokens[i];
token = parser.PeekToken(i);
if (token == null || token.Id != id) {
return false;
}
}
return true;
}
/**
* Checks if the next token(s) in the parser match any token
* sequence in this set.
*
* @param parser the parser to check
* @param length the maximum number of tokens to check
*
* @return true if the next tokens are in the set, or
* false otherwise
*/
public bool IsNext(Parser parser, int length) {
Sequence seq;
for (int i = 0; i < elements.Count; i++) {
seq = (Sequence) elements[i];
if (seq.IsNext(parser, length)) {
return true;
}
}
return false;
}