Importing version identifiers from another file?

[H. S. Teoh]

On Tue, Apr 12, 2022 at 10:07:15AM -0700, Ali Çehreli via Digitalmars-d-learn wrote:
> On 4/11/22 01:57, KytoDragon wrote:
> 
> > Is there any way to import version specifiers from a separate file?
> 
> Have you tried mixing in the versions? Have one file with the versions
> in it:
> 
>   // file: 'versions'
>   version = x;
> 
> Then mix it in:
> 
>   mixin (import ("versions"));
> 
>   version (x) { /* ... */ }
> 
> Seems to work for me.
[...]

If you need globally-defined versions, I'd just use the command-line
option `-version=MyVersionA -version=MyVersionB ...`.

Or, if you absolutely have to define versions in a source file, why not
just use enums + static if instead:

	// versions.d
	module versions;
	enum MyVersionA = true;
	enum MyVersionB = true;

	// program.d
	import versions;
	static if (MyVersionA) {
		...
	} else {
		...
	}

	// ... and so on


T

-- 
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