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use crate::metadata::Metadata;
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use super::{Expression, Literal, Name};

            

        

            

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use serde::{Deserialize, Serialize};

            

        

            

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use uniplate::derive::Uniplate;

            

        

            

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/// An `Atom` is an indivisible expression, such as a literal or a reference.

            

        

            

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#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, Uniplate)]

            

        

            

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#[uniplate()]

            

        

            

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#[biplate(to=Name)]

            

        

            

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#[biplate(to=Literal)]

            

        

            

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#[biplate(to=Metadata)]

            

        

            

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#[biplate(to=Expression)]

            

        

            

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pub enum Atom {

            

        

            

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    Literal(Literal),

            

        

            

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    Reference(Name),

            

        

            

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}

            

        

            

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impl std::fmt::Display for Atom {

            

        

            

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    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {

            

        

            

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        match self {

            

        

            

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            Atom::Literal(x) => x.fmt(f),

            

        

            

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            Atom::Reference(x) => x.fmt(f),

            

        

            

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        }

            

        

            

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    }

            

        

            

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}

            

        

            

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impl From<Literal> for Atom {

            

        

            

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    fn from(value: Literal) -> Self {

            

        

            

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        Atom::Literal(value)

            

        

            

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    }

            

        

            

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}

            

        

            

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impl From<Name> for Atom {

            

        

            

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    fn from(value: Name) -> Self {

            

        

            

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        Atom::Reference(value)

            

        

            

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    }

            

        

            

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}