IDE Window: Extract Procedure
Abstract: "Extract Procedure" takes some selected pascal statements and creates a new procedure/method from this code. This tool is useful to split big procedures or to easily create a new procedure from some code.
procedure DoSomething; begin CallSomething; end;
Select the line "CallSomething;" and do Extract Proc. A dialog pop ups and you can select the type and name of the procedure to create. For example: procedure, "NewProc". Result:
procedure NewProc; begin CallSomething; end; procedure DoSomething; begin NewProc; end;
You can see, that the new procedure "NewProc" was created with the selection as body and the old code was replaced by a call.
Local Variables and Parameters:
"Extract Proc" scans for used variables and automatically creates the parameter list and local variables. Example:
procedure TForm1.DoSomething(var Erni, Bert: integer); var i: Integer; // Comment begin Erni:=Erni+Bert; for i:=Erni to 5 do begin | end; end;
Select the for loop and create a new Procedure "NewProc". The local variable i is only used in the selection, so it will be moved to the new procedure. Erni is also used in the remaining code, so it will become a parameter.
procedure NewProc(const Erni: integer); var i: Integer; // Comment begin for i:=Erni to 5 do begin | end; end; procedure TForm1.DoSomething(var Erni, Bert: integer); begin Erni:=Erni+Bert; NewProc(Erni); end;
You can see "i" was moved to the new procedure (Note: including its comment) and Erni.
Pascal is a very powerful language, so don't expect it will work with every code. Current limits/ToDos:
- check if selection bounds on statement bounds
- "with" statements