fera-graph 0.2.0

Graph data structures and algorithms.
Documentation 
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#[derive(PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
pub enum Control {
    Continue,
    Break,
}

impl From<()> for Control {
    fn from(_: ()) -> Self {
        Control::Continue
    }
}

pub fn continue_if(cond: bool) -> Control {
    if cond {
        Control::Continue
    } else {
        Control::Break
    }
}

pub fn break_if(cond: bool) -> Control {
    if cond {
        Control::Break
    } else {
        Control::Continue
    }
}

macro_rules! return_unless {
    ($e:expr) => {
        if $e == Control::Break {
            return Control::Break;
        }
    };
}

macro_rules! break_unless {
    ($e:expr) => {
        if $e == Control::Break {
            break;
        }
    };
}