rust/chg/src/lib.rs

rust-matchers: improve `Matcher` trait ergonomics

`VisitChildrenSet` has no need to own the set, this will save allocations.

The `file_set` return type change is motivated by both ergonomics and... being
able to compile code.
The `AlwaysMatcher` does not store a `file_set`, which requires it to return an
owned `HashSet`, which in turn would change our return type to `Cow<&HgPath>`
(lifetimes omitted). This is both un-ergonomic and troublesome for more
complex lifetime issues (especially with the upcoming `FileMatcher` in the
following patch).

Differential Revision: https://phab.mercurial-scm.org/D7525

// Copyright 2018 Yuya Nishihara <[e-mail]>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.

extern crate bytes;
#[macro_use]
extern crate futures;
extern crate libc;
extern crate tokio;
extern crate tokio_hglib;
extern crate tokio_process;

mod attachio;
mod clientext;
pub mod locator;
pub mod message;
pub mod procutil;
mod runcommand;
mod uihandler;

pub use clientext::ChgClientExt;
pub use uihandler::{ChgUiHandler, SystemHandler};