Yes, I also finally realized that a big source file is not necessarily a bad
thing. It is a question of attitude. A good editor and IDE helps browse and
maintain the code.
Include files seem to be useful with FPC/Lazarus. With Delphi they are not so
useful.
The problem discussed here is not about OOP. It's about units (modules) and how compiler and linker use them.
The general question is: For what reason should I split my program in units at
all? The only reasons I can think of are:
1.) Modularity: You use a unit written by someone else. Then of course this
code is in a separate unit. Since Turbo Pascal you can get this (compiled) unit
without having the source code.
2.) Compile speed: If you have code in a separate unit which you do not change
(any longer), then the compiler does not need to compile all the
functions/classes within this unit on each build of the program. In the past
that has been a large speed up but I am not sure whether this is still an issue
on fast machines today (maybe only for very large projects).
Any other known reasons? In the past there were other limitations that forced
people to split programs into units (like 64 segment barriers) but I don't know
about such things today.
Include files only make sense if you include such a file in multiple source files.
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