type
  TFunc1 = function: integer;
  TFunc2 = function(i: integer): integer;
  TFunc3 = function(var i: integer): integer;
  TFunc4 = function(params a: array of integer): integer;
  TFunc5 = function(const i: integer): integer;
  TProc1 = procedure;
  TProc2 = procedure(i: integer);
  TProc3 = procedure(params a: array of integer);

function Func1: integer;
begin
end;

function Func2(i: integer): integer;
begin
end;

function Func3(var i: integer): integer;
begin
end;

function Func4(params a: array of integer): integer;
begin
end;

function Func5(const i: integer): integer;
begin
end;

procedure Proc1;
begin
end;

procedure Proc2(i: integer);
begin
end;

procedure Proc3(params arr: array of integer);
begin
end;

procedure Test1(f: TFunc1);
begin
  f;
end;

procedure Test2(f: TFunc2);
begin
  f(2);
end;

procedure Test3(f: TFunc3);
begin
  var i := 1;
  f(i);
end;

procedure Test4(f: TFunc5);
begin
  var i := 0;
  f(i);
end;

var
  f1: TFunc1;
  f2: TFunc2;
  f3: TFunc3;
  f4: TFunc4;
  f5: TFunc5;
  i: integer;
  p1: TProc1;
  p2: TProc2;
  p3: TProc3;

begin
  f1 := Func1;
  f2 := Func2;
  f3 := Func3;
  f4 := Func4;
  f5 := Func5;
  f1;
  f2(2);
  f3(i);
  f4(1, 2, 3);
  f5(i);
  p1 := Proc1;
  p2 := Proc2;
  p3 := Proc3;
  p1;
  p2(2);
  p3(1, 2);
  Test1(Func1);
  Test2(Func2);
  Test3(Func3);
  Test4(Func5);
  
end.