Hello,

I'm trying to work with UCS4Char (for this:
https://github.com/ik5/fp-msgpack), but I can't figure out how to do it.
For example, if do the following:

-------------------------------
{$H+}
uses cwstring;
var
 ch : UCS4Char;
begin
  ch := #$233B4;
  writeln(ch);
end.
-------------------------------

I get the following error:
ppcx64 test.pas
Free Pascal Compiler version 2.6.0 [2012/05/17] for x86_64 Copyright (c) 1993-2011 by Florian Klaempfl and others Target OS: Linux for x86-64
Compiling test.pas
test.pas(8,9) Error: Illegal char constant
test.pas(8,9) Error: Incompatible types: got "Constant String" expected "UCS4Char"
test.pas(11) Fatal: There were 2 errors compiling module, stopping Fatal: Compilation aborted

And if I do it without the hash, then it's just a number

So how can I use it ?

Thanks,
Ido

ik wrote

And if I do it without the hash, then it's just a number

UCS4Char is in fact just a number, and UCS4String is just a dynamic array of cardinal. UCS4 is not implemented as a complete string type in FPC (or Delphi, for that matter).

Jonas

Cardinal is a bit problematic type, you mean longword. :)

Thanks

Why do you see cardinal as a "problematic type"? At least for FPC it is a simple alias to longword (and it has actually existed even before longword in FPC).

Tomas

At least with Delphi it has unclear what exactly the size of it. And the following code:
https://github.com/ik5/fp-msgpack/blob/master/src/msgpack.pas#L528

Used to be with Cardinal (the only difference), and It never acted as expected. The only thing I changed was from cardinal to longword, and it acts as expected.

With Delphi or with FPC? As already mentioned, FPC defines cardinal as an alias to longword (and UInt32 mentioned in your reference as an alias to cardinal) so there should be no difference between cardinal, longword and UInt32 (and in the past, cardinal was even the primary type in FPC directly known by the compiler).

With Delphi, I believe that very old Delphi versions defined cardinal as a 31-bit type (i.e. simply the non-negative part of the longint range), but I also believe (while not using Delphi at all myself) that all currently relevant Delphi versions (i.e. not considering things like Delphi 1.0 and Delphi 2.0 which probably didn't support longword anyway) define cardinal as equal to longword.

Tomas

With FPC. The value was saved wrong.
The only thing that I changed in my code was moving from Cardinal to LongWord.

I do not own Delphi or Windows copy for many years now :)

ik wrote

On Fri, Nov 9, 2012 at 6:56 PM, Tomas Hajny wrote: > On Fri, November 9, 2012 17:38, ik wrote: >> On Fri, Nov 9, 2012 at 6:12 PM, Tomas Hajny wrote: >>> On Fri, November 9, 2012 17:01, ik wrote:

.
.

.
.

With FPC. The value was saved wrong. The only thing that I changed in my code was moving from Cardinal to LongWord.

.
.

Sorry, but I cannot imagine how this could happen considering that one of them is alias to the other and thus they cannot be treated differently by the compiler (you can even interchange them for actual parameters and the compiler wouldn't notice it). If you have a short test showing otherwise, please post a bug report.

Tomas