CPtr
Converts a pointer expression to a specified data type pointer
CPtr( PointerDataType, expression )
Converts expression to PointerDataType.
PointerDataType must be a Pointer type (e.g. a DataType Ptr or an Any Ptr), or a Type (Alias) to one.
expression may have a different pointer type or be an Integer.
Note: Currently, FB does not actually enforce that PointerDataType must be a pointer. This will likely change in future versions though. Currently, it will display a warning if you try to convert to a non-pointer, if you compile with the -w pedantic compiler switch.
Syntax
CPtr( PointerDataType, expression )
Description
Converts expression to PointerDataType.
PointerDataType must be a Pointer type (e.g. a DataType Ptr or an Any Ptr), or a Type (Alias) to one.
expression may have a different pointer type or be an Integer.
Note: Currently, FB does not actually enforce that PointerDataType must be a pointer. This will likely change in future versions though. Currently, it will display a warning if you try to convert to a non-pointer, if you compile with the -w pedantic compiler switch.
Example
Dim intval As Integer
Dim intptr As Integer Ptr
intval = &h0080
intptr = @intval
'' will print -128 and 128, as the first expression will be "seen" as an signed byte
Print *CPtr( Byte Ptr, intptr ), *intptr
Dim intptr As Integer Ptr
intval = &h0080
intptr = @intval
'' will print -128 and 128, as the first expression will be "seen" as an signed byte
Print *CPtr( Byte Ptr, intptr ), *intptr
Dialect Differences
- Not available in the -lang qb dialect unless referenced with the alias __Cptr.
Differences from QB
- New to FreeBASIC
See also