1997-09-16 23:33:21 +04:00
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/*
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2003-08-25 23:51:54 +04:00
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** $Id: lparser.h,v 1.49 2003/07/09 20:11:30 roberto Exp roberto $
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2001-08-11 00:53:03 +04:00
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** Lua Parser
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1997-09-16 23:33:21 +04:00
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** See Copyright Notice in lua.h
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*/
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#ifndef lparser_h
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#define lparser_h
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2001-09-07 21:39:10 +04:00
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#include "llimits.h"
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1997-09-16 23:33:21 +04:00
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#include "lobject.h"
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2001-08-27 19:16:28 +04:00
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#include "ltable.h"
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1997-09-16 23:33:21 +04:00
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#include "lzio.h"
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2000-02-22 16:31:43 +03:00
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/*
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2000-03-03 15:33:59 +03:00
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** Expression descriptor
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2000-02-22 16:31:43 +03:00
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*/
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2000-03-03 21:53:17 +03:00
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2000-02-22 16:31:43 +03:00
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typedef enum {
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2001-06-05 22:17:01 +04:00
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VVOID, /* no value */
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VNIL,
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2001-12-12 01:48:44 +03:00
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VTRUE,
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VFALSE,
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2001-06-05 22:17:01 +04:00
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VK, /* info = index of constant in `k' */
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VLOCAL, /* info = local register */
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2001-09-07 21:39:10 +04:00
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VUPVAL, /* info = index of upvalue in `upvalues' */
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2002-03-14 21:01:52 +03:00
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VGLOBAL, /* info = index of table; aux = index of global name in `k' */
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2001-06-05 22:17:01 +04:00
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VINDEXED, /* info = table register; aux = index register (or `k') */
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2002-05-09 22:00:38 +04:00
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VJMP, /* info = instruction pc */
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2001-06-05 22:17:01 +04:00
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VRELOCABLE, /* info = instruction pc */
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VNONRELOC, /* info = result register */
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VCALL /* info = result register */
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2000-03-03 15:33:59 +03:00
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} expkind;
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2000-02-22 16:31:43 +03:00
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2000-03-03 15:33:59 +03:00
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typedef struct expdesc {
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expkind k;
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2002-01-26 00:50:39 +03:00
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int info, aux;
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2001-06-05 22:17:01 +04:00
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int t; /* patch list of `exit when true' */
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int f; /* patch list of `exit when false' */
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2000-03-03 15:33:59 +03:00
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} expdesc;
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2000-02-22 16:31:43 +03:00
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2003-07-09 19:36:38 +04:00
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typedef struct upvaldesc {
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2003-07-10 00:11:30 +04:00
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lu_byte k;
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lu_byte info;
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2003-07-09 19:36:38 +04:00
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} upvaldesc;
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2002-03-14 21:01:52 +03:00
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struct BlockCnt; /* defined in lparser.c */
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2002-05-14 21:52:22 +04:00
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2000-02-22 16:31:43 +03:00
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/* state needed to generate code for a given function */
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typedef struct FuncState {
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2000-03-10 21:37:44 +03:00
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Proto *f; /* current function header */
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2002-02-09 01:42:41 +03:00
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Table *h; /* table to find (and reuse) elements in `k' */
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2000-02-22 16:31:43 +03:00
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struct FuncState *prev; /* enclosing function */
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2000-03-13 23:37:16 +03:00
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struct LexState *ls; /* lexical state */
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struct lua_State *L; /* copy of the Lua state */
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2002-03-14 21:01:52 +03:00
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struct BlockCnt *bl; /* chain of current blocks */
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2000-12-28 15:55:41 +03:00
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int pc; /* next position to code (equivalent to `ncode') */
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2000-03-04 23:18:15 +03:00
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int lasttarget; /* `pc' of last `jump target' */
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2002-05-14 21:52:22 +04:00
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int jpc; /* list of pending jumps to `pc' */
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2001-06-05 22:17:01 +04:00
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int freereg; /* first free register */
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int nk; /* number of elements in `k' */
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2001-06-28 18:57:17 +04:00
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int np; /* number of elements in `p' */
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2000-12-28 15:55:41 +03:00
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int nlocvars; /* number of elements in `locvars' */
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2003-07-09 19:36:38 +04:00
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lu_byte nactvar; /* number of active local variables */
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upvaldesc upvalues[MAXUPVALUES]; /* upvalues */
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2003-07-10 00:11:30 +04:00
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unsigned short actvar[MAXVARS]; /* declared-variable stack */
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2000-02-22 16:31:43 +03:00
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} FuncState;
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2003-08-25 23:51:54 +04:00
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Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, const char *name);
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1997-09-16 23:33:21 +04:00
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#endif
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