mirror of
https://github.com/fluencelabs/marine-rs-sdk-test
synced 2025-04-24 23:12:13 +00:00
78 lines
1.9 KiB
Rust
78 lines
1.9 KiB
Rust
/*
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* Copyright 2018 Fluence Labs Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//! Contains definitions for memory errors.
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use core::alloc::LayoutErr;
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use std::alloc::AllocErr;
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use std::error::Error;
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use std::fmt::{self, Display};
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use std::io;
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#[derive(Debug, Clone)]
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pub struct MemError(String);
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impl Display for MemError {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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write!(f, "MemError({:?})", self)
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}
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}
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impl Error for MemError {}
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impl MemError {
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pub fn new(message: &str) -> Self {
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MemError(message.to_string())
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}
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pub fn from_err<E: Error + Display>(err: &E) -> Self {
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MemError::new(&err.to_string())
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}
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}
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/// Creates `From` instance for MemError for each specified error types.
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///
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/// Example:
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///
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/// ```
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/// // usage of macro:
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///
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/// mem_error_from![io::Error]
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///
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/// // code will be generated:
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///
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/// impl From<io::Error> for MemError {
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/// fn from(err: io::Error) -> Self {
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/// MemError::from_err(err)
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/// }
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/// }
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///
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/// ```
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// TODO: move this macro to utils or use 'quick-error' or 'error-chain' crates
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macro_rules! mem_error_from {
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( $( $x:ty );* ) => {
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$(
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impl From<$x> for MemError {
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fn from(err: $x) -> Self {
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MemError::from_err(&err)
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}
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}
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)*
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}
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}
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mem_error_from! [LayoutErr; AllocErr; io::Error];
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