A look at C++14, part 1

It didn't provide particularly nice syntax: it just provided a way to chain functions onto the stdin, stdout and stderr (optionally combined) of fork()/exec()ed subprocesses, so it looked like execl() with extra arguments jammed on the start to signify the stdin / stdout / stderr functions (if any: if none, /dev/null got attached to that fd instead). No pretty pipelining unless you invoked the function again in the stdout or stderr functions. But, obviously, the thing was parallelized: it was just pipes under the surface, after all.

This proposal is definitely better than what I hacked up. :)