pm_lex_callback_t Struct Reference

When you are lexing through a file, the lexer needs all of the information that the parser additionally provides (for example, the local table). More...

#include <parser.h>

Data Fields
void *	data
	This opaque pointer is used to provide whatever information the user deemed necessary to the callback.
void(*	callback )(void *data, pm_parser_t *parser, pm_token_t *token)
	This is the callback that is called when a token is lexed.

Detailed Description

When you are lexing through a file, the lexer needs all of the information that the parser additionally provides (for example, the local table).

So if you want to properly lex Ruby, you need to actually lex it in the context of the parser. In order to provide this functionality, we optionally allow a struct to be attached to the parser that calls back out to a user-provided callback when each token is lexed.

Field Documentation

data

void* pm_lex_callback_t::data

This opaque pointer is used to provide whatever information the user deemed necessary to the callback.

In our case we use it to pass the array that the tokens get appended into.

callback

void(* pm_lex_callback_t::callback) (void *data, pm_parser_t *parser, pm_token_t *token)

This is the callback that is called when a token is lexed.

It is passed the opaque data pointer, the parser, and the token that was lexed.

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The documentation for this struct was generated from the following file:

• include/prism/parser.h