Re: 5.2 feature list?

[Rici Lake <lua@...>]

On 2-Oct-06, at 1:35 PM, Rici Lake wrote:

> I don't think that's really necessary. It can easily be written 
> (although the following code has not actually been tested):

Oops

> /* If possible, pushes onto the stack the string coercion of the object
>    at stack or pseudo index obj, and returns a pointer to the C string.
>    If plen is not NULL, stores the length of the returned string in 
> plen.
>
>    If the indicated object cannot be coerced to a string, returns
>    NULL, does not alter plen, and does not alter the stack.
>  */
> const char *my_pushstringvalue (luaState *L, int obj, size_t *plen) {
>   switch (lua_type(L, obj)) {
>     case LUA_TSTRING:
>     case LUA_TNUMBER:
>       lua_pushvalue(L, obj);
        break;
>     default: {
>       if (0 == luaL_callmeta(L, obj, "__string"))
>         return NULL;
>     }
>   }
>   return lua_tolstring(L, -1, plen);
> }
>
> /* If the object at stack or pseudo index obj is a string, returns
>    a pointer to the C string and, if plen is not NULL, stores the
>    length of the string in plen. Otherwise, returns NULL and does
>    not alter plen.
>  */
> const char *my_rawtostring (lua_State *L, int obj, size_t *plen) {
>   if (lua_type(L, obj) == LUA_TSTRING)
>     return lua_tolstring(L, obj, plen);
>   else
>     return NULL;
> }