[fpc-devel] Compiler message colour scheme

J. Gareth Moreton gareth at moreton-family.com
Mon Nov 23 01:59:53 CET 2020

I'm getting there.  I keep getting distracted or lost though! Hardware 
failures don't help!

I'm trying a different approach this time and writing a whitepaper like 
I've done with my more major changes for Free Pascal, so I can describe 
its uses and how it works etc.  It can be updated of course, but it 
means I have something to refer to if I lose my way, and others can 
better add to the concept.

In the case of that PrintColor example, I don't think it could be 
inlined, for example, due to the call to IntToStr, among other things 
(like if you call PrintColor with a non-constant actual parameter), but 
if IntToStr were a pure function as well (and there's no reason why it 
can't), then logically GenerateColorCode could easily be pure.

I'm glad there's still interest in pure functions.  It may be a while 
though, and I'm being tempted with a bounty and Patreon pledges to 
implement "static single assignment" into the Free Pascal Compiler.  
That will take some research to see if it's even possible and not prone 
to completely breaking things!

First things first though, I've got a bug to fix in AArch64, and on the 
same platform, I'm almost finshed implementing the optimisation that 
turns division by a constant into a multiplication and shift.

Gareth aka. Kit

On 22/11/2020 21:37, Ryan Joseph via fpc-devel wrote:
>> On Nov 22, 2020, at 10:09 AM, J. Gareth Moreton via fpc-devel <fpc-devel at lists.freepascal.org> wrote:
>> Personally I'd write the function as something like "function GenerateColorCode(codes: array of Byte): ansistring;", mostly in anticipation of pure functions, because then the compiler can just replace the call with the relevant string at compile time, but that's a long way off!
> That would great. Hopefully this gets finished some day.
> Regards,
> 	Ryan Joseph
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