Unit's name collides with variable name, but not function name

[TCH]

teststufff.pas:

Code: Pascal  [Select][+][-]

1. unit teststufff;
2.  
3. interface
4.  
5. procedure teststufff;
6.  
7. implementation
8.  
9. procedure teststufff;
10. begin
11. end;
12.  
13. end.

fpc teststufff.pas:

Code: [Select]

Free Pascal Compiler version 3.2.2 [2021/07/09] for x86_64
Copyright (c) 1993-2021 by Florian Klaempfl and others
Target OS: Linux for x86-64
Compiling teststufff.pas
13 lines compiled, 0.0 secteststuffv.pas:

Code: Pascal  [Select][+][-]

1. unit teststuffv;
2.  
3. interface
4.  
5. var teststuffv: integer;
6.  
7. implementation
8.  
9. end.

fpc teststuffv.pas:

Code: [Select]

Free Pascal Compiler version 3.2.2 [2021/07/09] for x86_64
Copyright (c) 1993-2021 by Florian Klaempfl and others
Target OS: Linux for x86-64
Compiling teststuffv.pas
teststuffv.pas(5,15) Error: Duplicate identifier "teststuffv"
teststuffv.pas(7,1) Fatal: There were 1 errors compiling module, stopping
Fatal: Compilation aborted
Error: /usr/bin/ppcx64 returned an error exitcodeWhy does the name of a variable collide with the unit's name? If it is because of "identifier", then why does not the function's name colliding with it? I do not understand the logic.

Also, how can i prevent/avoid this collision? The names have to remain the same.

[Thaddy]

This is documented.
The unit name can't be used in the same unit.

The names have to remain the same.

can't be done.
You can escape a var with &, but you can't use the unit name inside that unit.
(I think it is actually a bug that it works for the procedure name, that should also fail.)

[ASerge]

can't be done.

Can. Even so:

Code: Pascal  [Select][+][-]

1. unit Unit1;
2.  
3. {$mode ObjFPC}{$H+}
4.  
5. interface
6.  
7. procedure Unit1;
8.  
9. implementation
10.  
11. procedure Unit1;
12.  
13.   procedure Unit1;
14.   begin
15.   end;
16.  
17. begin
18. end;
19.  
20. end.

Although it's unusual for me. Delphi 7 does not allow this.

[Thaddy]

Yes,
Unfortunately it does.
But it does not allow the variable as I explicitly pointed out! Grr.

[TCH]

This is documented.
The unit name can't be used in the same unit.

The names have to remain the same.

can't be done.
You can escape a var with &, but you can't use the unit name inside that unit.
(I think it is actually a bug that it works for the procedure name, that should also fail.)

It is intentional? Why is this so? The scope's name should not collide with the items'.  As a matter of fact, in case of functions, one can even use the scope:

Code: Pascal  [Select][+][-]

1. teststufff.teststufff;

And that works.