lparser.h
上传用户:dzyhzl
上传日期:2019-04-29
资源大小:56270k
文件大小:2k
- /*
- ** $Id: lparser.h,v 1.26 2000/10/09 13:47:46 roberto Exp $
- ** 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;
- /* 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 jlt; /* list of jumps to `lasttarget' */
- short stacklevel; /* number of values on activation register */
- short nactloc; /* number of active local variables */
- short nupvalues; /* number of upvalues */
- int lastline; /* line where last `lineinfo' was generated */
- struct Breaklabel *bl; /* chain of breakable blocks */
- expdesc upvalues[MAXUPVALUES]; /* upvalues */
- int actloc[MAXLOCALS]; /* local-variable stack (indices to locvars) */
- } FuncState;
- Proto *luaY_parser (lua_State *L, ZIO *z);
- #endif