xcsp3-rust 0.1.0

xcsp3-rust is a library that help constraint programming solvers implemented by Rust to read XCSP3 files.
Documentation 
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/*=============================================================================
* parser for CSP instances represented in XCSP3 Format
*
* Copyright (c) 2023 xcsp.org (contact @ xcsp.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*=============================================================================
*/

/*
* <p>@project_name: xcsp3-rust
* </p>
* <p>@author: luhan zhen
* </p>
* <p>@date:  2023/7/15 13:23
* </p>
* <p>@email: zhenlh20@mails.jlu.edu.cn
* </p>
* <p>@version: 1.0
* </p>
 * <p>@description: 1.0
* </p>
 */

use std::fmt::{Display, Formatter};

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ParseVariableError {
    pub msg: String,
    pub r#type: VariableError,
}

impl Display for ParseVariableError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        write!(f, "{:?}: {}", self.r#type, self.msg)
    }
}

impl ParseVariableError {
    pub(crate) fn get_not_found_error(s: &str) -> ParseVariableError {
        const WEBSITE: &str = " please visit http://xcsp.org/specifications/variables/integer/";
        ParseVariableError {
            msg: (s.to_owned() + WEBSITE),
            r#type: VariableError::NotFoundAsVariable,
        }
    }
    pub(crate) fn get_size_invalid_error(s: &str) -> ParseVariableError {
        const WEBSITE: &str = " please visit http://xcsp.org/specifications/variables";
        ParseVariableError {
            msg: (s.to_owned() + WEBSITE),
            r#type: VariableError::SizeInvalid,
        }
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub enum VariableError {
    NotFoundAsVariable,
    SizeInvalid,
}