rust: rustlazyancestors.__contains__ This changeset provides a Rust implementation of the iteration performed by lazyancestor.__contains__ It has the advantage over the Python iteration to use the 'seen' set encapsuled into the dedicated iterator (self._containsiter), rather than storing emitted items in another set (self._containsseen), and hence should reduce the memory footprint. Also, there's no need to convert intermediate emitted revisions back into Python integers. At this point, it would be tempting to implement the whole lazyancestor object in Rust, but that would lead to more C wrapping code (two objects) for little expected benefits.

// Copyright 2018 Georges Racinet <gracinet@anybox.fr>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.

//! Bindings for CPython extension code
//!
//! This exposes methods to build and use a `rustlazyancestors` iterator
//! from C code, using an index and its parents function that are passed
//! from the caller at instantiation.

extern crate hg;
extern crate libc;

mod ancestors;
pub use ancestors::{
    rustlazyancestors_contains, rustlazyancestors_drop,
    rustlazyancestors_init, rustlazyancestors_next,
};