/*

** $Id: lpcode.h,v 1.8 2016/09/15 17:46:13 roberto Exp $

*/

#if !defined(lpcode_h)

#define lpcode_h

#include "lua.h"

#include "lptypes.h"

#include "lptree.h"

#include "lpvm.h"

int tocharset (TTree *tree, Charset *cs);

int checkaux (TTree *tree, int pred);

int fixedlen (TTree *tree);

int hascaptures (TTree *tree);

int lp_gc (lua_State *L);

Instruction *compile (lua_State *L, Pattern *p);

void realloccode (lua_State *L, Pattern *p, int nsize);

int sizei (const Instruction *i);

#define PEnullable      0

#define PEnofail        1

/*

** nofail(t) implies that 't' cannot fail with any input

*/

#define nofail(t)	checkaux(t, PEnofail)

/*

** (not nullable(t)) implies 't' cannot match without consuming

** something

*/

#define nullable(t)	checkaux(t, PEnullable)

#endif