fungi-lang 0.1.52

Fungi: A typed, functional language for programs that name their cached dependency graphs
Documentation 
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fgi_mod!{
    // Optional natural numbers
    type OpNat = (+ Unit + Nat );
   
    let opnat_split:(
        Thk[0] 0 Op2Nat -> 0 F (x OpNat x OpNat)
    ) = {            
        ret thunk #xyo. match (xyo) {
            _u => {
                ret (inj1 (), inj1 ())
            }
            xy => {
                let (x,y) = { ret xy }
                ret (inj2 x, inj2 y)
            }}
    }
    
    let opnat_pair:(
        Thk[0] 0 (x OpNat x OpNat) -> 0 F (Op2Nat)
    ) = {
        ret thunk #xoyo. let (xo,yo) = { ret xoyo }
        match (xo) {
            _u => { ret inj1 () }
            x  => { match (yo) {
                _u => { ret inj1 () }
                y  => { ret inj2 (x,y) }
            }}
        }
    }    
}