Parle\Lexer::callout

(PECL parle >= 0.7.2)

Parle\Lexer::callout — Define token callback

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

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

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

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