Proposing 4 New Ideas - #4 Standard Compiler Methods
lazarus / 64-FPC development

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IndigoBoy83 · 2019-03-22 12:38

PAGE #4 - Introducing Standard Compiler Methods

We now demonstrate the ease of using, what I call, "standard compiler
methods".

I suggest that every standard compiler method starts with the numeral
sign: "#".

For example, I suggest that every object/class should come endowed
with two standard write methods, one for Write(*) and the other for
Writeln(*).

When one writes an object/class this standard write method is
invoked. 

It should be made virtual so that the programmer can override it as he
wishes.

Consider the following code as example of the use of a standard write
method.

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i Program
Example_Of_Standard_Write_Method; interface uses  Classes; type   
some_object_type = object      Procedure #Write; virtual;     
Procedure #Writeln; virtual;    end; implementation Procedure
some_object_type.#Write;begin  write( 'Now you can write an object!'
);end; Procedure some_object_type.#Writeln;begin  #Write; 
writeln;end; var   some_object : some_object_type; begin  New(
some_object );   some_object.#Writeln;  // Outputs: "Now you can write
an object!"  writeln( 'My object writes: "', some_object, '" !' );  //
Outputs: "My object writes: "Now you can write an object!" !"  
Dispose( some_object );end;
Output for previous code:

Now you can write an object!
My object writes: "Now you can write an object!" !

Observe that in the line
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i writeln(
'My object write: "', some_object, '" !' );the writeln function
accesses some_object.#Write; if this standard compiler method is not
implemented within the object/class, then we should always have some
default method to be used.

So now we can send any general class/object to the write or writeln
functions.  Other standard compiler methods should be made as needed
(perhaps #read, #readln, ..).

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marcov · 2019-03-22 13:01

Well, there is tobject.tostring virtual method already !??!?