mirror of
https://github.com/lua/lua
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81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/*
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** $Id: ltm.h,v 1.21 2001/01/24 16:20:54 roberto Exp roberto $
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** Tag methods
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** See Copyright Notice in lua.h
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*/
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#ifndef ltm_h
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#define ltm_h
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#include "lobject.h"
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#include "lstate.h"
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/*
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* WARNING: if you change the order of this enumeration,
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* grep "ORDER TM"
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*/
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typedef enum {
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TM_GETTABLE = 0,
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TM_SETTABLE,
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TM_INDEX,
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TM_GETGLOBAL,
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TM_SETGLOBAL,
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TM_ADD,
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TM_SUB,
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TM_MUL,
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TM_DIV,
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TM_POW,
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TM_UNM,
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TM_LT,
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TM_CONCAT,
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TM_GC,
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TM_FUNCTION,
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TM_N /* number of elements in the enum */
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} TMS;
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/*
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** masks for allowable tag methods
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** (see `luaT_validevents')
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*/
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#define HAS_TM_GETGLOBAL(L,t) (1<<(t) & ((1<<LUA_TUSERDATA) | \
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(1<<LUA_TTABLE) | \
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(1<<LUA_TNIL)))
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#define HAS_TM_SETGLOBAL(L,t) (1<<(t) & ((1<<LUA_TUSERDATA) | \
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(1<<LUA_TTABLE) | \
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(1<<LUA_TNIL) | \
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(1<<LUA_TFUNCTION)))
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struct TM {
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Closure *method[TM_N];
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TString *collected; /* list of garbage-collected udata with this tag */
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TString *name; /* type name */
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int basictype;
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};
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#define luaT_gettm(G,tag,event) (G->TMtable[tag].method[event])
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#define luaT_gettmbyObj(G,o,e) (luaT_gettm((G),luaT_tag(o),(e)))
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#define basictypename(G, t) (G->TMtable[t].name->str)
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#define validtag(G,t) (NUM_TAGS <= (t) && (t) < G->ntag)
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extern const char *const luaT_eventname[];
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void luaT_init (lua_State *L);
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int luaT_newtag (lua_State *L, const char *name, int basictype);
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const char *luaT_typename (global_State *G, const TObject *o);
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int luaT_tag (const TObject *o);
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int luaT_validevent (int t, int e); /* used by compatibility module */
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#endif
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