Optional parameter in function call [SOLVED]

[carl_caulkett]

* Mac Mini M1
* macOS 14.6.1
* Lazarus 3.99
* FPC 3.3.1

I'm planning to use a function with the signature...

Code: Pascal  [Select][+][-]

1. function CreateMidiClient(Errors: TStrings; MidiClient: longword = 0): Boolean;
2.  

I've got vague memories of a restriction in Delphi, whereby the optional parameter had to be at the end of the list of parameters. Can anyone tell me, am I imagining this, and if not, does the same restriction apply to FPC?

[dbannon]

Yes, optional has to be at the end. Otherwise, the function will not be able to tell which one you have left off .

Davo

[440bx]

You can read about it at https://wiki.freepascal.org/Default_parameter

The important addition is that there can be more than one default parameter and they all must be "trailing" parameters.

HTH.

[Thaddy]

And that if you set the right-most parameter, you have to set all other parameters with defaults  too.

[carl_caulkett]

Thanks everyone!