letter-sequence 2.1.0

A method to create sequence displayed as uppercase or lower letters, or digits
Documentation 
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use std::fmt;
use std::convert::From;
use crate::sequence::renderer;


#[derive(Builder, Clone, Debug, PartialEq, Eq)]
#[builder(derive(PartialEq, Eq))]
pub struct Element {
	inner: u64,
	renderer: renderer::SeqRenderer,
}

impl fmt::Display for Element {
	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
		write!(f, "{}", self.renderer.render( self.inner ).unwrap() )
	}
}

impl From<Element> for u64 {
	fn from(e: Element) -> u64 {
		e.inner
	}
}

#[cfg(test)]
mod test {
	use super::*;
	#[test]
	fn display() {
		let seqrender = renderer::SeqRendererBuilder::numeric().build().unwrap();
		let elem = ElementBuilder::default()
			.inner(42u64)
			.renderer(seqrender)
			.build()
			.unwrap();
		assert_eq!( elem.to_string(), "42" );
	}
}