Am 15.02.2022 um 15:05 schrieb Ryan Joseph via fpc-pascal:

On Feb 15, 2022, at 8:26 PM, Sven Barth via fpc-pascal 
<fpc-pascal@lists.freepascal.org> wrote:

It's relatively "easy" to implement assigning a nested function to function 
references. However assigning a nested function variable to a function reference is much 
harder.
Assigning a function reference to a nested function variable is hard as well.

I'm getting lost with the terms now I think. If your function takes a function 
reference parameter and you assign it a nested function  pointer, this is 
difficult? I believe this was Michaels request in that code snippet.

=== code excerpt begin ===

// function/procedure/routine
function Foobar: LongInt; forward;

// function/procedure/routine variable
type
  TFoobarFunc = function: LongInt;

// method
  TFoo = class
    function Foobar: LongInt;
  end;

// method variable
  TFoobarMethod = function: LongInt of object;

// function/procedure/routine reference
  TFoobarFuncRef = reference to function: LongInt;

function Foobar: LongInt;

  // nested function/procedure/routine
  function FoobarSub: LongInt;
  begin
  end;

// nested function/procedure/routine variable
type
  TFoobarNested = function: LongInt is nested;

var
   f: TFoobarFuncRef;
begin
  // anonymous function/procedure/routine
  f := function: LongInt
        begin
        end;
end;

=== code excerpt end ===

Regards,
Sven
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