invalid conversion from TDesC8 * to HBufC8 *

[hako84]

Hello

I am new to Symbian C++, any help is greatly appreciated,

I have defined a function as follows

TDesC8* CsomeClass:: get _HBufC8_Ptr ()
{
Return i_hbufc8_ptr;
}

When i use :

HBufC8* hbufcPtr = someObject-> get _HBufC8_Ptr();

I get the error : invalid conversion from TDesC8* to HBufC8*

Any ideas why ?

Many thanks !

[vaibhavjain]

Welcome to forum nokia Dibo.

Since C++ is a statically typed language so the compiler cannot directly convert an object to its subtype. You have upcasted an HBufC8* to TDesC* , so downcasting will require a static or reinterpret cast (dynamic casting isnt available with sdk compilers). Please change to code below:

HBufC8* hbufcPtr = STATIC_CAST(HBufC8*,someObject-> get _HBufC8_Ptr());

or

HBufC8* hbufcPtr = (HBufC8*)(someObject-> get _HBufC8_Ptr());


Hope that helps,
VJ

[hotcheese]

There is no need to use casts with descriptors, in fact they should always be avoided.

If you are returning a HBufC8* from a class and transferring ownership of that class then you should make the function return type a HBUfC8* also.