[PATCH] vbscript: Implemented IsNumeric

[Shuai Meng]

2014-07-17 11:11 GMT+08:00 Dmitry Timoshkov <dmitry at baikal.ru>:

> Shuai Meng <mengshuaicalendr at gmail.com> wrote:
>
> > +        switch(V_VT(arg)) {
> > +        case VT_UI1:
> > +        case VT_I2:
> > +        case VT_I4:
> > +        case VT_I8:
> > +        case VT_R4:
> > +        case VT_R8:
> > +        case VT_BOOL:
> > +        case VT_EMPTY:
> > +        case VT_CY:
> > +            V_BOOL(res) = VARIANT_TRUE;
> > +            break;
>
> This list is far from being complete. It seems that it should also
> contain at least VT_UI2, VT_UI4, VT_UI8, VT_I1, VT_INT, VT_UINT.
> VT_VECTOR, VT_ARRAY and VT_BYREF modifers probably also should be
> taken into account.
>
> --
> Dmitry.
>
Hi, I think over it again. Let's face the fact: what are all the possible
results of  switch(V_VT(arg)) ? Will VT_UI2, VT_UI4, VT_UI8, VT_I1, VT_INT,
VT_UINT and so on exist? My answer is no. arg comes from users' input,
which means it only belongs to the  subtypes of variant, see here:
http://msdn.microsoft.com/en-us/library/9e7a57cf(v=vs.84).aspx
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