Hi all,
Is there a way to enable a mode switches from fpc command line? Thank you.
Regards,
~Bee

Mr Bee wrote

Hi all, Is there a way to enable a mode switches from fpc command line?

Yes, using -M<x>, however these are discarded as soon as a $Mode directive is read (just like any $Mode directive resets any $Modeswitch directive).

Regards,
Sven

As mention in the email title, what I meant is {$modeswitch} not {$mode} as explain here: https://www.freepascal.org/docs-html/prog/progsu105.html

For example, if I want to use extended record in objfpc mode, then I have to define {$mode objfpc}{$modeswitch advancedrecords}
in every single file that using the feature. I prefer to put it in a config file or call it from command line, as default setting, so my code is cleaner from such things.

Is it possible?
Thank you.
Regards,

–Mr Bee

Pada Selasa, 4 Februari 2020 13.42.10 WIB, Sven Barth via fpc-pascal menulis:

Mr Bee wrote

Hi all, Is there a way to enable a mode switches from fpc command line?

Yes, using -M<x>, however these are discarded as soon as a $Mode directive is read (just like any $Mode directive resets any $Modeswitch directive).

Regards,
Sven

I personally find it very convenient to have a global include file for such features.
E.g. we have a global.inc with {$mode objfpc}{$modeswitch advancedrecords} and include it {$include global.inc} in every file of our project. This way we can easily modify a lot of compiler directives / macros that would affect all the units.

On Tue, Feb 4, 2020 at 10:41 AM Mr Bee via fpc-pascal <

As Sven explained a $mode resets all modeswitches. What you need is a switch to alter modeswitch of a mode. And there is currently no such switch.

For example a syntax could be:
-MObjFPC+AdvancedRecords+AnsiStrings-NestedComments

Mattias

$ cat tt.pp
program x;

{{test }

type
  tr = record
    procedure test;
  end;
  procedure tr.test;
    begin
    end;
begin
  writeln(sizeof(string));
end.

$ fpc -MObjFPC -Madvancedrecords -Mansistrings -Mnestedcomments- tt Free Pascal Compiler version 3.0.4 [2018/09/30] for x86_64 Copyright (c) 1993-2017 by Florian Klaempfl and others Target OS: Darwin for x86_64
Compiling tt.pp
Assembling (pipe) tt.s
Linking tt
16 lines compiled, 0.1 sec

$ ./tt
8

Setting a different mode resets all modeswitches to the default for that mode (since that's one of the main points of a mode). Setting a different modeswitch does not reset anything.

Jonas

It’s a great info, Jonas. Thank you.
I didn’t know FPC has -M option for $modeswitch. Based on the official document¹, the -M option is to select language modes, not language features. I know changing language mode would reset mode switches. It’s no problem for me because I wrote the code and I stick to ObjFPC mode for all the code, no exception. But I want to use advanced record feature as well. By setting the language mode and language features in the global config, I don’t need to write them in every single file.

–Mr Bee
_____¹ A Alphabetical listing of command line options

|
|
| |
A Alphabetical listing of command line options

|

|

|

Pada Rabu, 5 Februari 2020 02.30.04 WIB, Jonas Maebe menulis:

$ cat tt.pp
program x;

{{test }

type
  tr = record
    procedure test;
  end;
  procedure tr.test;
    begin
    end;
begin
  writeln(sizeof(string));
end.

$ fpc -MObjFPC -Madvancedrecords -Mansistrings -Mnestedcomments- tt Free Pascal Compiler version 3.0.4 [2018/09/30] for x86_64 Copyright (c) 1993-2017 by Florian Klaempfl and others Target OS: Darwin for x86_64
Compiling tt.pp
Assembling (pipe) tt.s
Linking tt
16 lines compiled, 0.1 sec

$ ./tt
8

Setting a different mode resets all modeswitches to the default for that mode (since that's one of the main points of a mode). Setting a different modeswitch does not reset anything.

Jonas

Mr Bee wrote

It’s a great info, Jonas. Thank you. I didn’t know FPC has -M option for $modeswitch.

Sven mentioned earlier that it does:
https://lists.freepascal.org/pipermail/fpc-pascal/2020-February/057337.html

Based on the official document¹, the -M option is to select language modes, not language features.

It will be fixed.

Jonas

Jonas Maebe wrote

> Based on the official > document¹, the -M option is to select language modes, not language features. It will be fixed.

Tomas already added it to the output of fpc -h in trunk in the mean time.

Jonas