fera_graph/traverse/
control.rs

1// This Source Code Form is subject to the terms of the Mozilla Public
2// License, v. 2.0. If a copy of the MPL was not distributed with this
3// file, You can obtain one at http://mozilla.org/MPL/2.0/.
4
5#[derive(PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
6pub enum Control {
7    Continue,
8    Break,
9}
10
11impl From<()> for Control {
12    fn from(_: ()) -> Self {
13        Control::Continue
14    }
15}
16
17pub fn continue_if(cond: bool) -> Control {
18    if cond {
19        Control::Continue
20    } else {
21        Control::Break
22    }
23}
24
25pub fn break_if(cond: bool) -> Control {
26    if cond {
27        Control::Break
28    } else {
29        Control::Continue
30    }
31}
32
33macro_rules! return_unless {
34    ($e:expr) => {
35        if $e == Control::Break {
36            return Control::Break;
37        }
38    };
39}
40
41macro_rules! break_unless {
42    ($e:expr) => {
43        if $e == Control::Break {
44            break;
45        }
46    };
47}
fera_graph/traverse/control.rs

fera_graph/traverse/
control.rs
