Trace the parser operation

# Parle\RParser::trace

(PECL parle >= 0.7.0)

Parle\RParser::trace — Trace the parser operation

### Descrierea

public Parle\RParser::trace ( void ) : string

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

### Parametri

Această funcție nu are parametri.

### Valorile întoarse

Returns a string with the trace information.