rlm@1: /*
rlm@1: ** $Id: lparser.h,v 1.57.1.1 2007/12/27 13:02:25 roberto Exp $
rlm@1: ** Lua Parser
rlm@1: ** See Copyright Notice in lua.h
rlm@1: */
rlm@1: 
rlm@1: #ifndef lparser_h
rlm@1: #define lparser_h
rlm@1: 
rlm@1: #include "llimits.h"
rlm@1: #include "lobject.h"
rlm@1: #include "lzio.h"
rlm@1: 
rlm@1: 
rlm@1: /*
rlm@1: ** Expression descriptor
rlm@1: */
rlm@1: 
rlm@1: typedef enum {
rlm@1:   VVOID,	/* no value */
rlm@1:   VNIL,
rlm@1:   VTRUE,
rlm@1:   VFALSE,
rlm@1:   VK,		/* info = index of constant in `k' */
rlm@1:   VKNUM,	/* nval = numerical value */
rlm@1:   VLOCAL,	/* info = local register */
rlm@1:   VUPVAL,       /* info = index of upvalue in `upvalues' */
rlm@1:   VGLOBAL,	/* info = index of table; aux = index of global name in `k' */
rlm@1:   VINDEXED,	/* info = table register; aux = index register (or `k') */
rlm@1:   VJMP,		/* info = instruction pc */
rlm@1:   VRELOCABLE,	/* info = instruction pc */
rlm@1:   VNONRELOC,	/* info = result register */
rlm@1:   VCALL,	/* info = instruction pc */
rlm@1:   VVARARG	/* info = instruction pc */
rlm@1: } expkind;
rlm@1: 
rlm@1: typedef struct expdesc {
rlm@1:   expkind k;
rlm@1:   union {
rlm@1:     struct { int info, aux; } s;
rlm@1:     lua_Number nval;
rlm@1:   } u;
rlm@1:   int t;  /* patch list of `exit when true' */
rlm@1:   int f;  /* patch list of `exit when false' */
rlm@1: } expdesc;
rlm@1: 
rlm@1: 
rlm@1: typedef struct upvaldesc {
rlm@1:   lu_byte k;
rlm@1:   lu_byte info;
rlm@1: } upvaldesc;
rlm@1: 
rlm@1: 
rlm@1: struct BlockCnt;  /* defined in lparser.c */
rlm@1: 
rlm@1: 
rlm@1: /* state needed to generate code for a given function */
rlm@1: typedef struct FuncState {
rlm@1:   Proto *f;  /* current function header */
rlm@1:   Table *h;  /* table to find (and reuse) elements in `k' */
rlm@1:   struct FuncState *prev;  /* enclosing function */
rlm@1:   struct LexState *ls;  /* lexical state */
rlm@1:   struct lua_State *L;  /* copy of the Lua state */
rlm@1:   struct BlockCnt *bl;  /* chain of current blocks */
rlm@1:   int pc;  /* next position to code (equivalent to `ncode') */
rlm@1:   int lasttarget;   /* `pc' of last `jump target' */
rlm@1:   int jpc;  /* list of pending jumps to `pc' */
rlm@1:   int freereg;  /* first free register */
rlm@1:   int nk;  /* number of elements in `k' */
rlm@1:   int np;  /* number of elements in `p' */
rlm@1:   short nlocvars;  /* number of elements in `locvars' */
rlm@1:   lu_byte nactvar;  /* number of active local variables */
rlm@1:   upvaldesc upvalues[LUAI_MAXUPVALUES];  /* upvalues */
rlm@1:   unsigned short actvar[LUAI_MAXVARS];  /* declared-variable stack */
rlm@1: } FuncState;
rlm@1: 
rlm@1: 
rlm@1: LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
rlm@1:                                             const char *name);
rlm@1: 
rlm@1: 
rlm@1: #endif