RNA Transcription example.

lib.rs

use std::fmt;

pub struct RibonucleicAcid {
    strand: String
}

pub struct DeoxyribonucleicAcid {
    strand: String
}

pub trait NucleicAcid {
    fn new(strand: &str) -> Self;
}

impl NucleicAcid for RibonucleicAcid {
   fn new(strand: &str) -> RibonucleicAcid {
        RibonucleicAcid {
            strand: strand.to_string()
        }
    }
}

impl NucleicAcid for DeoxyribonucleicAcid {
   fn new(strand: &str) -> DeoxyribonucleicAcid {
        DeoxyribonucleicAcid {
            strand: strand.to_string()
        }
    }
}

impl RibonucleicAcid {
    fn pair_of(base: char) -> char {
        match base {
            'C' => 'G',
            'G' => 'C',
            'A' => 'U',
            'T' => 'A',
            _ => base
        }
    }
}

impl DeoxyribonucleicAcid {
   pub fn to_rna(&self) -> RibonucleicAcid {
       let x: String = self.strand.chars().map(RibonucleicAcid::pair_of).collect();
       RibonucleicAcid::new(&x)
   }
}

impl PartialEq for RibonucleicAcid {
    fn eq(&self, other: &RibonucleicAcid) -> bool {
        self.strand == other.strand
    }
}

impl fmt::Debug for RibonucleicAcid {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "RibonucleicAcid {{ strand: {} }}", self.strand)
    }
}