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Parle\RLexer::push

(PECL parle >= 0.5.1)

Parle\RLexer::pushAdd a lexer rule

Description

public void Parle\RLexer::push ( string $regex , integer $id )
public void Parle\RLexer::push ( string $state , string $regex , integer $id , string $newState )
public void Parle\RLexer::push ( string $state , string $regex , string $newState )

Push a pattern for lexeme recognition.

Parameters

regex

Regular expression used for token matching.

id

Token id. If the lexer instance is meant to be used standalone, this can be an arbitrary number. If the lexer instance is going to be passed to the parser, it has to be an id returned by Parle\RParser::tokenid().

state

State name.

newState

New state name, after the rule was applied.

Return Values

No value is returned.

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