//! Writer trait.

#[cfg(feature = "pem")]

pub(crate) mod pem;

pub(crate) mod slice;

use crate::Result;

#[cfg(feature = "std")]

use std::io;

/// Writer trait which outputs encoded DER.

pub trait Writer {

    /// Write the given DER-encoded bytes as output.

    ///

    /// # Errors

    /// If the write operation failed.

    fn write(&mut self, slice: &[u8]) -> Result<()>;

    /// Write a single byte.

    ///

    /// # Errors

    /// If the write operation failed.

    fn write_byte(&mut self, byte: u8) -> Result<()> {

        self.write(&[byte])

    }

}

#[cfg(feature = "std")]

impl<W: io::Write> Writer for W {

    fn write(&mut self, slice: &[u8]) -> Result<()> {

        <Self as io::Write>::write(self, slice)?;

        Ok(())

    }

}