csvsql 0.1.4

SQL like engine that works on CSV file.
Documentation 
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use std::{
    fmt::{Debug, Display},
    hash::Hash,
};

pub enum SmartReference<'a, T> {
    Borrowed(&'a T),
    Owned(T),
}

impl<T> std::ops::Deref for SmartReference<'_, T> {
    type Target = T;

    fn deref(&self) -> &T {
        match self {
            Self::Borrowed(v) => v,
            Self::Owned(v) => v,
        }
    }
}

impl<T> std::convert::AsRef<T> for SmartReference<'_, T> {
    fn as_ref(&self) -> &T {
        self
    }
}
impl<T> From<T> for SmartReference<'_, T> {
    fn from(value: T) -> Self {
        Self::Owned(value)
    }
}
impl<'a, T> From<&'a T> for SmartReference<'a, T> {
    fn from(value: &'a T) -> Self {
        Self::Borrowed(value)
    }
}
impl<'a, T> SmartReference<'a, T> {
    pub fn duplicate(&'a self) -> Self {
        match self {
            Self::Borrowed(v) => Self::Borrowed(v),
            Self::Owned(v) => Self::Borrowed(v),
        }
    }
}
impl<T: PartialEq> PartialEq for SmartReference<'_, T> {
    fn eq(&self, other: &Self) -> bool {
        match (self, other) {
            (Self::Borrowed(me), Self::Borrowed(other)) => me.eq(other),
            (Self::Borrowed(me), Self::Owned(other)) => me.eq(&other),
            (Self::Owned(me), Self::Borrowed(other)) => me.eq(other),
            (Self::Owned(me), Self::Owned(other)) => me.eq(other),
        }
    }
}
impl<T: PartialEq> Eq for SmartReference<'_, T> {}

impl<T: Hash> Hash for SmartReference<'_, T> {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        match self {
            Self::Borrowed(v) => v.hash(state),
            Self::Owned(v) => v.hash(state),
        }
    }
}

impl<T: Debug> Debug for SmartReference<'_, T> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Borrowed(b) => b.fmt(f),
            Self::Owned(b) => b.fmt(f),
        }
    }
}
impl<T: Display> Display for SmartReference<'_, T> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Borrowed(b) => b.fmt(f),
            Self::Owned(b) => b.fmt(f),
        }
    }
}
impl<T: Clone> SmartReference<'_, T> {
    pub fn extract(self) -> T {
        match self {
            SmartReference::Owned(t) => t,
            SmartReference::Borrowed(t) => t.clone(),
        }
    }
}