7c335e8764
* misc: bump license header to 2019 * misc: remove_duplicate_empty_lines.sh * misc: run license header script * commit cargo lock
71 lines
2.0 KiB
Rust
71 lines
2.0 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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//! Error utils
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use std::fmt;
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#[derive(Debug, PartialEq, Eq, Clone, Copy)]
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/// Error indicating an expected value was not found.
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pub struct Mismatch<T> {
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/// Value expected.
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pub expected: T,
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/// Value found.
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pub found: T,
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}
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impl<T: fmt::Display> fmt::Display for Mismatch<T> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.write_fmt(format_args!("Expected {}, found {}", self.expected, self.found))
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}
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}
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#[derive(Debug, PartialEq, Eq, Clone, Copy)]
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/// Error indicating value found is outside of a valid range.
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pub struct OutOfBounds<T> {
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/// Minimum allowed value.
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pub min: Option<T>,
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/// Maximum allowed value.
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pub max: Option<T>,
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/// Value found.
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pub found: T,
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}
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impl<T> OutOfBounds<T> {
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pub fn map<F, U>(self, map: F) -> OutOfBounds<U>
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where F: Fn(T) -> U
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{
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OutOfBounds {
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min: self.min.map(&map),
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max: self.max.map(&map),
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found: map(self.found),
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}
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}
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}
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impl<T: fmt::Display> fmt::Display for OutOfBounds<T> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let msg = match (self.min.as_ref(), self.max.as_ref()) {
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(Some(min), Some(max)) => format!("Min={}, Max={}", min, max),
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(Some(min), _) => format!("Min={}", min),
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(_, Some(max)) => format!("Max={}", max),
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(None, None) => "".into(),
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};
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f.write_fmt(format_args!("Value {} out of bounds. {}", self.found, msg))
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}
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}
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