Note from ide when adding a object in a TFPGObjectlist

[JohnKuiper]

Wat is this message mean:

note: call to subroutine "function TFPGObjectlist<objkeurmeesteruitslag.TRasPerkeurmeester>.Add(const item : TRasPerKeuster) longint;" marked as inline is not inlined

And why is the function using a const in the parameter?
Isn't an object aleady a pointer or wil it copied the pointer reference to a local parameter when not using 'const' ?

[TRon]

Wat is this message mean:

note: call to subroutine "function TFPGObjectlist<objkeurmeesteruitslag.TRasPerkeurmeester>.Add(const item : TRasPerKeuster) longint;" marked as inline is not inlined

See also reference manual inline. The compiler indicates that it was unable to follow the hint to inline the code during compilation.

And why is the function using a const in the parameter?
Isn't an object aleady a pointer or wil it copied the pointer reference to a local parameter when not using 'const' ?

See also reference manual constant parameters. It is an agreement that the called routine will not change the contents of the parameter. If the called routine disobeys then the compiler will complain about it.

edit: example

Code: Pascal  [Select][+][-]

1. program test;
2.  
3. {$mode objfpc}
4.  
5. procedure Hitme(const x: pointer);
6. begin
7.   x := nil;
8. end;
9.  
10. begin
11.   HitMe(@Hitme);
12. end.
13.  

the compiler barfs:

Code: [Select]

Free Pascal Compiler version 3.2.2 [2021/05/16] for x86_64
Copyright (c) 1993-2021 by Florian Klaempfl and others
Target OS: Linux for x86-64
Compiling test.pas
test.pas(7,3) Error: Can't assign values to const variable
test.pas(12,4) Fatal: There were 1 errors compiling module, stopping
Fatal: Compilation aborted


[Thaddy]

const generates more optimal code if it adheres to the the rule that the parameter will not be changed inside the procedure or function. This is especially the case with parameters of a managed type:strings, classes, advanced records etc. because the compiler knows it can skip reference counting code. But it can also be beneficial with simple types: depending on the complexity of the code it can save a register and/or a copy