Parle\RParser::trace

(PECL parle >= 0.7.0)

Parle\RParser::trace — Trace the parser operation

说明

public Parle\RParser::trace(): string

Retrieve the current parser operation description. This can be especially useful to study the parser and to optimize the grammar.

参数

此函数没有参数。

返回值

Returns a string with the trace information.