Final by default?

[Rikki Cattermole]

On Friday, 14 March 2014 at 10:30:47 UTC, Rikki Cattermole wrote:
> Another option is using pure functions and static if's.
>
> const bool ProgrammingSections = getProgrammingSections;
> const bool PasteBinFullSection = getPasteBinFullSection;
>
> pure bool getProgrammingSections() {
> 	if (CompleteSite) {
> 		return true;
> 	} else {
> 		return false;
> 	}
> }
>
> pure bool getPasteBinFullSection() {
> 	if (CompleteSite || ProgrammingSections) {
> 		return true;
> 	} else {
> 		return false;
> 	}
> }
>
> static if (ProgrammingSections) {
>     // yay programming
> }
>
>
> static if (PasteBinFullSection) {
>     // Ooo pastebin!
> }
>
>
> Also works rather well through different modules.

Or for more advanced usage that could be quite useful in phobos:

pure bool isVersionDefinedAnd(ARGS...)() {
	foreach(name; ARGS) {
		mixin("version(" ~ name ~ ") {} else return false;");
	}
	return true;	
}

enum isLinux1And = isVersionDefinedAnd!("linux");
enum isLinux2And = isVersionDefinedAnd!("linux", "Posix");

pragma(msg, isLinux1And);
pragma(msg, isLinux2And);


pure bool isVersionDefinedOr(ARGS...)() {
	foreach(name; ARGS) {
		mixin("version(" ~ name ~ ") return true;");
	}
	return false;	
}

enum isMainPlatform = isVersionDefinedOr!("linux", "Windows", 
"Posix", "Android", "OSX");

pragma(msg, isMainPlatform);