Foo[] foo = ...;

foreach(f; foo) { f.bar.baz.quux; }

and the computation is parallelisable then you can write

import std.parallelism; foreach(f; parallel(foo)) { f.bar.baz.quux; }

and it will parallelised across threads.

I guess std.parallelism's parallel might be more analogous to an "instance" of an executor.

std::sort(par,a.begin(),a.end());

to call a parallel implementation of sort on `a`.