mirror of
https://github.com/lua/lua
synced 2024-11-27 07:09:36 +03:00
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/*
|
|
** $Id: lparser.h,v 1.13 2000/03/13 20:37:16 roberto Exp roberto $
|
|
** LL(1) Parser and code generator for Lua
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
#ifndef lparser_h
|
|
#define lparser_h
|
|
|
|
#include "lobject.h"
|
|
#include "lzio.h"
|
|
|
|
|
|
/*
|
|
** Expression descriptor
|
|
*/
|
|
|
|
typedef enum {
|
|
VGLOBAL,
|
|
VLOCAL,
|
|
VINDEXED,
|
|
VEXP
|
|
} expkind;
|
|
|
|
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;
|
|
|
|
|
|
#define NO_JUMP (-1) /* marks end of patch list */
|
|
|
|
|
|
/* state needed to generate code for a given function */
|
|
typedef struct FuncState {
|
|
Proto *f; /* current function header */
|
|
struct FuncState *prev; /* enclosing function */
|
|
struct LexState *ls; /* lexical state */
|
|
struct lua_State *L; /* copy of the Lua state */
|
|
int pc; /* next position to code */
|
|
int lasttarget; /* `pc' of last `jump target' */
|
|
int stacksize; /* number of values on activation register */
|
|
int nlocalvar; /* number of active local variables */
|
|
int nupvalues; /* number of upvalues */
|
|
int nvars; /* number of entries in f->locvars (-1 if no debug information) */
|
|
int lastsetline; /* line where last SETLINE was issued */
|
|
expdesc upvalues[MAXUPVALUES]; /* upvalues */
|
|
TString *localvar[MAXLOCALS]; /* store local variable names */
|
|
} FuncState;
|
|
|
|
|
|
Proto *luaY_parser (lua_State *L, ZIO *z);
|
|
|
|
|
|
#endif
|