Phobos PR: `call` vs. `bindTo`

[Idan Arye via Digitalmars-d]

On Tuesday, 5 August 2014 at 21:10:25 UTC, Tofu Ninja wrote:
> Can you explain the utility of both of them? I am not big into 
> functional programming so I am not seeing it.

The purpose of `bindTo` is to emulate the `let` expressions found 
in many functional languages (see 
http://en.wikipedia.org/wiki/Let_expression). The idea is to bind 
a value to a name for the limited scope of a single expression.

Note that `bindTo` could be implemented as:

     alias bindTo = std.functional.unaryFun;

and I'll probably change the implementation to this if this PR 
will be chosen. The reason I think `bindTo` is needed even if 
it's just an alias to `unaryFun` is that `bindTo` conveys better 
that the you are binding a name to a value, not just 
overcomplicating the code.