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use alloc::vec::Vec;

/// Trait that allows appending bytes.
/// Used especially by the NestedEncode trait to output data.
///
/// In principle it can be anything, but in practice
/// we only keep 1 implementation, which is Vec<u8>.
/// This is to avoid code duplication by monomorphization.
pub trait NestedEncodeOutput {
	/// Write to the output.
	fn write(&mut self, bytes: &[u8]);

	/// Write a single byte to the output.
	fn push_byte(&mut self, byte: u8) {
		self.write(&[byte]);
	}
}

impl NestedEncodeOutput for Vec<u8> {
	fn write(&mut self, bytes: &[u8]) {
		self.extend_from_slice(bytes)
	}
}