CPTR

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgCptr
• Last revised: 2019-07-04

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Converts a pointer expression to a specified data type pointer

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 ``PointerDataTypemust be a pointer. This will likely change in future versions though. Currently, it may display a warning if you try to convert to a non-pointer (for any conversion type if you compile with the -w pedantic compiler switch).

Examples

start GeSHi

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

end GeSHi

Dialect Differences

• Not available in the -lang qb dialect unless referenced with the alias __Cptr.

Differences from QB

• New to FreeBASIC

See also

• Ptr
• Cast
• Cbyte
• Cshort
• Cint
• Clngint
• Csng
• Cdbl

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