Module io.jenetics.ext

Package io.jenetics.ext.internal.parser

Class Parser<T>

java.lang.Object

io.jenetics.ext.internal.parser.Parser<T>

Type Parameters:

T - the token type

Direct Known Subclasses:

TokenParser

public class Parser<T>
extends Object

Parser implementation for parsing a given token sequences.

Since:

7.1

Version:

7.1

Constructor Summary

Constructors

Constructor	Description
Parser(Tokenizer<T> tokenizer, int k)	Create a new parser object with the given tokenizer and lookahead count k.

Method Summary

Modifier and Type	Method	Description
void	consume()	Consumes the next token.
T	LT(int index)	Return the lookahead token with the given index.
T	match(Predicate<? super T> token)	Try to match and consume the next token of the given type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Parser

public Parser(Tokenizer<T> tokenizer,
 int k)

Create a new parser object with the given tokenizer and lookahead count k.

Parameters:

tokenizer - the token source this parser uses

k - the lookahead count

Method Details

LT

public T LT(int index)

Return the lookahead token with the given index. The index starts at 1. The returned token might be null.

Parameters:

index - lookahead index

Returns:

the token at the given index

match

public T match(Predicate<? super T> token)

Try to match and consume the next token of the given type. If the current token is not from the given type, a ParsingException is thrown.

Parameters:

token - the token type to match

Returns:

the matched token

Throws:

ParsingException - if the current token doesn't match the desired token

consume

public void consume()

Consumes the next token.