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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/.
//
//! FailableBool Filter implementation, so we can insert this in filter construction
//!
//! Will be automatically included when including `filter::Filter`, so importing this module
//! shouldn't be necessary.
//!
use failable::filter::FailableFilter;
#[must_use = "filters are lazy and do nothing unless consumed"]
#[derive(Clone)]
pub struct FailableBool(bool);
impl FailableBool {
pub fn new(b: bool) -> FailableBool {
FailableBool(b)
}
}
impl From<bool> for FailableBool {
fn from(b: bool) -> FailableBool {
FailableBool::new(b)
}
}
impl<N> FailableFilter<N> for FailableBool {
type Error = ();
fn filter(&self, _: &N) -> Result<bool, Self::Error> {
Ok(self.0)
}
}
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