lua/lparser.h

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/*
** $Id: lparser.h,v 1.21 2000/08/08 18:26:05 roberto Exp roberto $
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** LL(1) Parser and code generator for Lua
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** See Copyright Notice in lua.h
*/
#ifndef lparser_h
#define lparser_h
#include "lobject.h"
#include "lzio.h"
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/*
** Expression descriptor
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*/
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typedef enum {
VGLOBAL,
VLOCAL,
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VINDEXED,
VEXP
} expkind;
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typedef struct expdesc {
expkind k;
union {
int index; /* VGLOBAL: `kstr' index of global name; VLOCAL: stack index */
struct {
int t; /* patch list of `exit when true' */
int f; /* patch list of `exit when false' */
} l;
} u;
} expdesc;
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/* state needed to generate code for a given function */
typedef struct FuncState {
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Proto *f; /* current function header */
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struct FuncState *prev; /* enclosing function */
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struct LexState *ls; /* lexical state */
struct lua_State *L; /* copy of the Lua state */
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int pc; /* next position to code */
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int lasttarget; /* `pc' of last `jump target' */
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int jlt; /* list of jumps to `lasttarged' */
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int stacklevel; /* number of values on activation register */
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int nlocalvar; /* number of active local variables */
int nupvalues; /* number of upvalues */
int nvars; /* number of entries in f->locvars */
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int lastline; /* line where last `lineinfo' was generated */
int nlineinfo; /* index of next `lineinfo' to be generated */
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struct Breaklabel *bl; /* chain of breakable blocks */
expdesc upvalues[MAXUPVALUES]; /* upvalues */
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TString *localvar[MAXLOCALS]; /* store local variable names */
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} FuncState;
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Proto *luaY_parser (lua_State *L, ZIO *z);
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#endif