How can I d开发者_开发技巧elete a metatable foo
created with luaL_newmetatable( L, "foo" );
, so that luaL_getmetatable( L, "foo" );
will push a NIL value again?
Whatever the reason you may have to delete the metatable, it is possible. luaL_newmetatable(L, "foo")
creates a table, which is stored in the Lua registry with the key "foo"
.
To delete the table, just set the field "foo"
in the registry to nil
. The code in C:
lua_pushnil(L);
lua_setfield(L, LUA_REGISTRYINDEX, "foo");
Equivalent code in Lua:
debug.getregistry()["foo"] = nil
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