gam-problem 0.3.125

Neutral solver/criterion contract types for the gam penalized-likelihood engine
Documentation 
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macro_rules! impl_reason_error_boilerplate {
    ($type:ident { $($variant:ident),+ $(,)? }) => {
        impl ::std::fmt::Display for $type {
            fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
                match self {
                    $(Self::$variant { reason })|+ => f.write_str(reason),
                }
            }
        }

        impl ::std::error::Error for $type {}

        impl From<$type> for String {
            fn from(err: $type) -> String {
                err.to_string()
            }
        }
    };
}