Define token callback

# Parle\Lexer::callout

(PECL parle >= 0.7.2)

Parle\Lexer::callout — Define token callback

### 説明

public Parle\Lexer::callout ( int `$id` , callable `$callback` ) : void

Define a callback to be invoked once lexer encounters a particular token.

### パラメータ

`id`

  Token id.

`callback`

  Callable to be invoked. The callable doesn't receive any arguments and its return value is ignored.

### 返り値

値を返しません。