Module io.jenetics.ext

Package io.jenetics.ext.internal.parser

Class TokenParser<V>

java.lang.Object

io.jenetics.ext.internal.parser.Parser<Token<V>>

io.jenetics.ext.internal.parser.TokenParser<V>

Type Parameters:

V - the token value type

public class TokenParser<V>
extends Parser<Token<V>>

Parser implementation for parsing explicit Token sequences.

Since:

7.1

Version:

7.1

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
int	LA(int index)	Return the token type code for the given lookahead index.
Token<V>	match(Token.Type type)	Try to match and consume the next token of the given type.

Methods inherited from class io.jenetics.ext.internal.parser.Parser

consume, LT, match

Methods inherited from class java.lang.Object

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

Constructor Details

TokenParser

public TokenParser(Tokenizer<Token<V>> 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

LA

public int LA(int index)

Return the token type code for the given lookahead index.

Parameters:

index - lookahead index

Returns:

the token type code for the given lookahead index

match

public Token<V> match(Token.Type type)

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:

type - the token type to match

Returns:

the matched token

Throws:

NullPointerException - if the given token type is null

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