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// License: see LICENSE file at root directory of `master` branch

//! # Error

use alloc::{
    borrow::Cow,
    fmt::{self, Display, Formatter},
};

#[cfg(feature="std")]
use std::io;

/// # Error
#[derive(Debug)]
pub struct Error<'a> {

    /// # Message
    msg: Cow<'a, str>,

}

impl<'a> Error<'a> {

    /// # Makes new instance
    pub fn new<S>(msg: S) -> Self where S: Into<Cow<'a, str>> {
        Self {
            msg: msg.into(),
        }
    }

    /// # Error message
    pub fn msg(&self) -> &str {
        &self.msg
    }

}

impl Display for Error<'_> {

    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
        f.write_str(&self.msg)
    }

}

#[cfg(feature="std")]
impl<'a> From<Error<'a>> for io::Error {

    fn from(err: Error<'a>) -> Self {
        io::Error::new(io::ErrorKind::Other, err.msg)
    }

}