Re: [PATCH 2/4] vbscript: Implemented VarType(try 3)

[Piotr Caban]

On 06/25/14 15:34, Shuai Meng wrote:
> 2014-06-25 17:32 GMT+08:00 Piotr Caban <[e-mail]
> >:
> On 06/25/14 04:19, Shuai Meng wrote:
>
>        static HRESULT Global_VarType(vbdisp_t *This, VARIANT *arg,
>     unsigned args_cnt, VARIANT *res)
>        {
>     -    FIXME("\n");
>     -    return E_NOTIMPL;
>     +    TRACE("(%s)\n", debugstr_variant(arg));
>     +
>     +    assert(args_cnt == 1);
>     +
>     +    if(V_VT(arg) & ~VT_TYPEMASK) {
>     +        FIXME("not supported %s\n", debugstr_variant(arg));
>     +        return E_NOTIMPL;
>     +    }
>     +
>     +    if(!res)
>     +        return DISP_E_BADVARTYPE;
>
> This function should not return error if res is NULL.
>
> But it returned error when res was NULL in CInt and other conversion
> functions. Will you please explain this?

You need to implement it in the same way as on windows. A test for this 
behavior may be following:
Call VarType(Empty)
because the function is not returning error the script is executed 
successfully.

In general functions are supposed to behave in the same way no matter if 
return value is used or not. Unfortunately there are some functions that 
behave differently.