• =?UTF-8?B?Tm9yZGzDtnc=?= (5/5) Apr 15 2016 Why does the build system Reggae use mixins everywhere in the D
• =?UTF-8?B?Tm9yZGzDtnc=?= (4/7) Apr 16 2016 Correction, it can do stuff either at CT or run-time as show here:
• Atila Neves (22/31) Apr 16 2016 Mixins are used so a D build description can be written at

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

Why does the build system Reggae use mixins everywhere in the D 
examples?

Doesn't this severly limit what the build rules are capable of in 
terms of run-time flexibility?

https://github.com/atilaneves/reggae

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

On Friday, 15 April 2016 at 13:18:46 UTC, Nordlöw wrote:
 Why does the build system Reggae use mixins everywhere in the D 
 examples?

 https://github.com/atilaneves/reggae

Correction, it can do stuff either at CT or run-time as show here:

https://github.com/atilaneves/reggae/blob/master/doc/basics.md

Could somebody highlight when either is adviced?

Atila Neves <atila.neves gmail.com> writes:

On Saturday, 16 April 2016 at 13:04:24 UTC, Nordlöw wrote:
 On Friday, 15 April 2016 at 13:18:46 UTC, Nordlöw wrote:
 Why does the build system Reggae use mixins everywhere in the 
 D examples?

 https://github.com/atilaneves/reggae

 Correction, it can do stuff either at CT or run-time as show 
 here:

 https://github.com/atilaneves/reggae/blob/master/doc/basics.md

 Could somebody highlight when either is adviced?

Mixins are used so a D build description can be written at 
module-scope, thereby looking like a scripting language. The only 
reason this is important is to enable builds that have run-time 
logic, which is pretty much all of the high-level rules (since 
they have to read the file system).
the build template mixin doesn't have to be used, the only thing 
reggae wants from a build description written in D is that there 
be one and exactly one function with the signature:

Build func();

That's the function that gets called to generate the build. Since 
I'm lazy I created a template mixin to write the function for me, 
which again means that all definitions can be at module-scope.
Basically it's so that the file looks like:

alias exe = executable!(...);
mixin build!(exe);

Instead of:

Build myBuild() {
     auto exe = executable(...);
     return Build(exe);
}


Atila