Delphi - Inline object declaration and assigning properties in a function call

Question

I was just wondering if a construct like the following c# function call is possible in Delphi:

C# code:

MyFunction(Param1, new MyClass() {property1 = "value1", property2 = true, property3 = 100}, Param3);

As for now in Delphi I should do the following to get that result:

Delphi code:

var
  aMyClass: TMyClass;
begin
  aMyClass:= TMyClass.Create;
  aMyClass.property1:= 'value1';
  aMyClass.property2:= True;
  aMyClass.property3:= 100;
  MyFunction(Param1, aMyClass, Param3);
end;

Much more verbose.

Help appreciate.

And be sure that you pass the aMyClass by reference

Alberto Miola
– Alberto Miola

2017-01-14 11:28:25 +00:00
Commented Jan 14, 2017 at 11:28 — Alberto Miola
– Alberto Miola, Commented Jan 14, 2017 at 11:28

David Heffernan · Accepted Answer · 2017-01-14 09:55:33Z

2

In Delphi the only way to achieve similar brevity is to define a constructor with parameters to receive the property values.

answered Jan 14, 2017 at 9:55

David Heffernan

616k46 gold badges1.1k silver badges1.5k bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Deltics Over a year ago

@Marco Carboni For what it's worth, although it doesn't help with any Delphi work, this is only a limitation of the Delphi implementation of Pascal. The Oxygene implementation supports this directly using inline initialisers. You can simply add property assignments in any ctor call so if there is only a default, parameterless ctor then in this case something similar to: MyFunction(param1, new MyClass( property1 := 'value', property2 := true), param3). Oxygene also supports dynamic objects, which you may also come across in C# code.

Collectives™ on Stack Overflow

Delphi - Inline object declaration and assigning properties in a function call

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related