Function lua_isnumber

third-party/lua-5.1.5/src/lapi.c:260–264

LUA_API int lua_isnumber (lua_State *L, int idx) {
  TValue n;
  const TValue *o = index2adr(L, idx);
  return tonumber(o, &n);
}


LUA_API int lua_isstring (lua_State *L, int idx) {