typhoon-context-macro 0.1.0-alpha.2

TODO
Documentation 
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use syn::{
    parse::{Parse, ParseStream},
    Expr, Token,
};

#[derive(Clone)]
pub struct ConstraintBump(pub Option<Expr>);

impl Parse for ConstraintBump {
    fn parse(input: ParseStream) -> syn::Result<Self> {
        if input.peek(Token![=]) {
            input.parse::<Token![=]>()?;
            let bump = input.parse()?;

            Ok(ConstraintBump(Some(bump)))
        } else {
            Ok(ConstraintBump(None))
        }
    }
}