tokit 0.0.0

Blazing fast parser combinators: parse-while-lexing (zero-copy), deterministic LALR-style parsing, no backtracking. Flexible emitters for fail-fast runtime or greedy compiler diagnostics
Documentation 
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#![allow(single_use_lifetimes)]

mod sealed {
  pub trait Sealed<T: ?Sized> {}

  impl<T, O> Sealed<O> for &T where T: Sealed<O> + ?Sized {}
}

/// A trait for converting to an equivalent type.
///
/// e.g. `&[u8]` is equivalent to [`bytes::Bytes`](https://docs.rs/bytes/latest/bytes/struct.Bytes.html)
pub trait ToEquivalent<T>: sealed::Sealed<T> {
  /// Converts this element to an equivalent type `T`.
  fn to_equivalent(&self) -> T;
}

impl<T, O> ToEquivalent<O> for &T
where
  T: ToEquivalent<O> + ?Sized,
{
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn to_equivalent(&self) -> O {
    T::to_equivalent(self)
  }
}

impl sealed::Sealed<str> for str {}
impl<'de: 'a, 'a> sealed::Sealed<&'a str> for &'de str {}

impl sealed::Sealed<[u8]> for [u8] {}
impl<'de: 'a, 'a> sealed::Sealed<&'a [u8]> for &'de [u8] {}

impl<'de: 'a, 'a> ToEquivalent<&'a str> for &'de str {
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn to_equivalent(&self) -> &'a str {
    self
  }
}

impl<'de: 'a, 'a> ToEquivalent<&'a [u8]> for &'de [u8] {
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn to_equivalent(&self) -> &'a [u8] {
    self
  }
}

/// A trait for converting into an equivalent type.
///
/// e.g. `&[u8]` is equivalent to [`bytes::Bytes`](https://docs.rs/bytes/latest/bytes/struct.Bytes.html)
///
/// ## Example
///
/// ```rust
/// use tokit::utils::IntoEquivalent;
///
/// let bytes: &[u8] = b"hello";
/// let str_ref: &str = "world";
///
/// // Identity conversions (consuming)
/// let _: &[u8] = bytes.into_equivalent();
/// let _: &str = str_ref.into_equivalent();
/// ```
pub trait IntoEquivalent<T>: sealed::Sealed<T> {
  /// Consumes this element and converts it into an equivalent type `T`.
  ///
  /// ## Example
  ///
  /// ```rust
  /// use tokit::utils::IntoEquivalent;
  ///
  /// let data: &[u8] = b"test";
  /// let result: &[u8] = data.into_equivalent();
  /// assert_eq!(result, b"test");
  /// ```
  fn into_equivalent(self) -> T;
}

impl<'de: 'a, 'a> IntoEquivalent<&'a str> for &'de str {
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn into_equivalent(self) -> &'a str {
    self
  }
}

impl<'de: 'a, 'a> IntoEquivalent<&'a [u8]> for &'de [u8] {
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn into_equivalent(self) -> &'a [u8] {
    self
  }
}

#[cfg(feature = "bytes")]
const _: () = {
  use bytes::Bytes;
  use sealed::Sealed;

  impl Sealed<Bytes> for [u8] {}

  impl ToEquivalent<Bytes> for [u8] {
    #[cfg_attr(test, inline)]
    #[cfg_attr(not(test), inline(always))]
    fn to_equivalent(&self) -> Bytes {
      Bytes::copy_from_slice(self)
    }
  }

  impl IntoEquivalent<Bytes> for &[u8] {
    #[cfg_attr(test, inline)]
    #[cfg_attr(not(test), inline(always))]
    fn into_equivalent(self) -> Bytes {
      Bytes::copy_from_slice(self)
    }
  }

  fn __assert_bytes_to_equivalent_impl() {
    fn _assert<T: ToEquivalent<Bytes> + ?Sized>() {}

    _assert::<[u8]>();
    _assert::<&[u8]>();
  }

  fn __assert_bytes_into_equivalent_impl() {
    fn _assert<T: IntoEquivalent<Bytes> + ?Sized>() {}

    _assert::<&[u8]>();
  }
};

#[cfg(feature = "hipstr")]
const _: () = {
  use hipstr::{HipByt, HipStr};
  use sealed::Sealed;

  impl Sealed<HipStr<'_>> for str {}

  impl<'a> ToEquivalent<HipStr<'a>> for str {
    #[cfg_attr(test, inline)]
    #[cfg_attr(not(test), inline(always))]
    fn to_equivalent(&self) -> HipStr<'a> {
      HipStr::from(self)
    }
  }

  impl<'a> IntoEquivalent<HipStr<'a>> for &str {
    #[cfg_attr(test, inline)]
    #[cfg_attr(not(test), inline(always))]
    fn into_equivalent(self) -> HipStr<'a> {
      HipStr::from(self)
    }
  }

  impl Sealed<HipByt<'_>> for [u8] {}

  impl<'a> ToEquivalent<HipByt<'a>> for [u8] {
    #[cfg_attr(test, inline)]
    #[cfg_attr(not(test), inline(always))]
    fn to_equivalent(&self) -> HipByt<'a> {
      HipByt::from(self)
    }
  }

  impl<'a> IntoEquivalent<HipByt<'a>> for &[u8] {
    #[cfg_attr(test, inline)]
    #[cfg_attr(not(test), inline(always))]
    fn into_equivalent(self) -> HipByt<'a> {
      HipByt::from(self)
    }
  }
};