diff options
Diffstat (limited to 'vendor/generic-array-0.12.4/src')
| -rw-r--r-- | vendor/generic-array-0.12.4/src/arr.rs | 126 | ||||
| -rw-r--r-- | vendor/generic-array-0.12.4/src/functional.rs | 94 | ||||
| -rw-r--r-- | vendor/generic-array-0.12.4/src/hex.rs | 102 | ||||
| -rw-r--r-- | vendor/generic-array-0.12.4/src/impl_serde.rs | 108 | ||||
| -rw-r--r-- | vendor/generic-array-0.12.4/src/impls.rs | 182 | ||||
| -rw-r--r-- | vendor/generic-array-0.12.4/src/iter.rs | 190 | ||||
| -rw-r--r-- | vendor/generic-array-0.12.4/src/lib.rs | 632 | ||||
| -rw-r--r-- | vendor/generic-array-0.12.4/src/sequence.rs | 320 |
8 files changed, 0 insertions, 1754 deletions
diff --git a/vendor/generic-array-0.12.4/src/arr.rs b/vendor/generic-array-0.12.4/src/arr.rs deleted file mode 100644 index ebe687500..000000000 --- a/vendor/generic-array-0.12.4/src/arr.rs +++ /dev/null @@ -1,126 +0,0 @@ -//! Implementation for `arr!` macro. - -use super::ArrayLength; -use core::ops::Add; -use typenum::U1; - -/// Helper trait for `arr!` macro -pub trait AddLength<T, N: ArrayLength<T>>: ArrayLength<T> { - /// Resulting length - type Output: ArrayLength<T>; -} - -impl<T, N1, N2> AddLength<T, N2> for N1 -where - N1: ArrayLength<T> + Add<N2>, - N2: ArrayLength<T>, - <N1 as Add<N2>>::Output: ArrayLength<T>, -{ - type Output = <N1 as Add<N2>>::Output; -} - -/// Helper type for `arr!` macro -pub type Inc<T, U> = <U as AddLength<T, U1>>::Output; - -#[doc(hidden)] -#[macro_export] -macro_rules! arr_impl { - (@replace_expr $e:expr)=>{ - 1 - }; - ($T:ty; $N:ty, [$($x:expr),*], []) => ({ - const __ARR_LENGTH:usize=0 $(+ $crate::arr_impl!(@replace_expr $x) )*; - fn __do_transmute<'a, T, N: $crate::ArrayLength<T>>(arr: [T; __ARR_LENGTH]) -> $crate::GenericArray<T, N> { - unsafe { $crate::transmute(arr) } - } - - let _:[();<$N as $crate::typenum::Unsigned>::USIZE]=[();__ARR_LENGTH]; - - __do_transmute::<$T,$N>([$($x),*]) - }); - ($T:ty; $N:ty, [], [$x1:expr]) => ( - $crate::arr_impl!($T; $crate::arr::Inc<$T, $N>, [$x1], []) - ); - ($T:ty; $N:ty, [], [$x1:expr, $($x:expr),+]) => ( - $crate::arr_impl!($T; $crate::arr::Inc<$T, $N>, [$x1], [$($x),+]) - ); - ($T:ty; $N:ty, [$($y:expr),+], [$x1:expr]) => ( - $crate::arr_impl!($T; $crate::arr::Inc<$T, $N>, [$($y),+, $x1], []) - ); - ($T:ty; $N:ty, [$($y:expr),+], [$x1:expr, $($x:expr),+]) => ( - $crate::arr_impl!($T; $crate::arr::Inc<$T, $N>, [$($y),+, $x1], [$($x),+]) - ); -} - -/// Macro allowing for easy generation of Generic Arrays. -/// Example: `let test = arr![u32; 1, 2, 3];` -#[macro_export] -macro_rules! arr { - ($T:ty; $(,)*) => ({ - unsafe { $crate::transmute::<[$T; 0], $crate::GenericArray<$T, $crate::typenum::U0>>([]) } - }); - ($T:ty; $($x:expr),* $(,)*) => ( - arr_impl!($T; $crate::typenum::U0, [], [$($x),*]) - ); - ($($x:expr,)+) => (arr![$($x),*]); - () => ("""Macro requires a type, e.g. `let array = arr![u32; 1, 2, 3];`") -} - - -mod doctests_only{ - /// - /// # With ellision - /// - /// Testing that lifetimes aren't transmuted when they're ellided. - /// - /// ```compile_fail - /// #[macro_use] extern crate generic_array; - /// fn main() { - /// fn unsound_lifetime_extension<'a, A>(a: &'a A) -> &'static A { - /// arr![&A; a][0] - /// } - /// } - /// ``` - /// - /// ```rust - /// #[macro_use] extern crate generic_array; - /// fn main() { - /// fn unsound_lifetime_extension<'a, A>(a: &'a A) -> &'a A { - /// arr![&A; a][0] - /// } - /// } - /// ``` - /// - /// # Without ellision - /// - /// Testing that lifetimes aren't transmuted when they're specified explicitly. - /// - /// ```compile_fail - /// #[macro_use] extern crate generic_array; - /// fn main() { - /// fn unsound_lifetime_extension<'a, A>(a: &'a A) -> &'static A { - /// arr![&'a A; a][0] - /// } - /// } - /// ``` - /// - /// ```compile_fail - /// #[macro_use] extern crate generic_array; - /// fn main() { - /// fn unsound_lifetime_extension<'a, A>(a: &'a A) -> &'static A { - /// arr![&'static A; a][0] - /// } - /// } - /// ``` - /// - /// ```rust - /// #[macro_use] extern crate generic_array; - /// fn main() { - /// fn unsound_lifetime_extension<'a, A>(a: &'a A) -> &'a A { - /// arr![&'a A; a][0] - /// } - /// } - /// ``` - #[allow(dead_code)] - pub enum DocTests{} -} diff --git a/vendor/generic-array-0.12.4/src/functional.rs b/vendor/generic-array-0.12.4/src/functional.rs deleted file mode 100644 index 50f4a71b8..000000000 --- a/vendor/generic-array-0.12.4/src/functional.rs +++ /dev/null @@ -1,94 +0,0 @@ -//! Functional programming with generic sequences -//! -//! Please see `tests/generics.rs` for examples of how to best use these in your generic functions. - -use super::ArrayLength; -use core::iter::FromIterator; -use sequence::*; - -/// Defines the relationship between one generic sequence and another, -/// for operations such as `map` and `zip`. -pub unsafe trait MappedGenericSequence<T, U>: GenericSequence<T> -where - Self::Length: ArrayLength<U>, -{ - /// Mapped sequence type - type Mapped: GenericSequence<U, Length = Self::Length>; -} - -unsafe impl<'a, T, U, S: MappedGenericSequence<T, U>> MappedGenericSequence<T, U> for &'a S -where - &'a S: GenericSequence<T>, - S: GenericSequence<T, Length = <&'a S as GenericSequence<T>>::Length>, - <S as GenericSequence<T>>::Length: ArrayLength<U>, -{ - type Mapped = <S as MappedGenericSequence<T, U>>::Mapped; -} - -unsafe impl<'a, T, U, S: MappedGenericSequence<T, U>> MappedGenericSequence<T, U> for &'a mut S -where - &'a mut S: GenericSequence<T>, - S: GenericSequence<T, Length = <&'a mut S as GenericSequence<T>>::Length>, - <S as GenericSequence<T>>::Length: ArrayLength<U>, -{ - type Mapped = <S as MappedGenericSequence<T, U>>::Mapped; -} - -/// Accessor type for a mapped generic sequence -pub type MappedSequence<S, T, U> = - <<S as MappedGenericSequence<T, U>>::Mapped as GenericSequence<U>>::Sequence; - -/// Defines functional programming methods for generic sequences -pub unsafe trait FunctionalSequence<T>: GenericSequence<T> { - /// Maps a `GenericSequence` to another `GenericSequence`. - /// - /// If the mapping function panics, any already initialized elements in the new sequence - /// will be dropped, AND any unused elements in the source sequence will also be dropped. - fn map<U, F>(self, f: F) -> MappedSequence<Self, T, U> - where - Self: MappedGenericSequence<T, U>, - Self::Length: ArrayLength<U>, - F: FnMut(Self::Item) -> U, - { - FromIterator::from_iter(self.into_iter().map(f)) - } - - /// Combines two `GenericSequence` instances and iterates through both of them, - /// initializing a new `GenericSequence` with the result of the zipped mapping function. - /// - /// If the mapping function panics, any already initialized elements in the new sequence - /// will be dropped, AND any unused elements in the source sequences will also be dropped. - #[inline] - fn zip<B, Rhs, U, F>(self, rhs: Rhs, f: F) -> MappedSequence<Self, T, U> - where - Self: MappedGenericSequence<T, U>, - Rhs: MappedGenericSequence<B, U, Mapped = MappedSequence<Self, T, U>>, - Self::Length: ArrayLength<B> + ArrayLength<U>, - Rhs: GenericSequence<B, Length = Self::Length>, - F: FnMut(Self::Item, Rhs::Item) -> U, - { - rhs.inverted_zip2(self, f) - } - - /// Folds (or reduces) a sequence of data into a single value. - /// - /// If the fold function panics, any unused elements will be dropped. - fn fold<U, F>(self, init: U, f: F) -> U - where - F: FnMut(U, Self::Item) -> U, - { - self.into_iter().fold(init, f) - } -} - -unsafe impl<'a, T, S: GenericSequence<T>> FunctionalSequence<T> for &'a S -where - &'a S: GenericSequence<T>, -{ -} - -unsafe impl<'a, T, S: GenericSequence<T>> FunctionalSequence<T> for &'a mut S -where - &'a mut S: GenericSequence<T>, -{ -} diff --git a/vendor/generic-array-0.12.4/src/hex.rs b/vendor/generic-array-0.12.4/src/hex.rs deleted file mode 100644 index 3ef92b1b9..000000000 --- a/vendor/generic-array-0.12.4/src/hex.rs +++ /dev/null @@ -1,102 +0,0 @@ -//! Generic array are commonly used as a return value for hash digests, so -//! it's a good idea to allow to hexlify them easily. This module implements -//! `std::fmt::LowerHex` and `std::fmt::UpperHex` traits. -//! -//! Example: -//! -//! ```rust -//! # #[macro_use] -//! # extern crate generic_array; -//! # extern crate typenum; -//! # fn main() { -//! let array = arr![u8; 10, 20, 30]; -//! assert_eq!(format!("{:x}", array), "0a141e"); -//! # } -//! ``` -//! - -use {ArrayLength, GenericArray}; -use core::cmp::min; -use core::fmt; -use core::ops::Add; -use core::str; -use typenum::*; - -static LOWER_CHARS: &'static [u8] = b"0123456789abcdef"; -static UPPER_CHARS: &'static [u8] = b"0123456789ABCDEF"; - -impl<T: ArrayLength<u8>> fmt::LowerHex for GenericArray<u8, T> -where - T: Add<T>, - <T as Add<T>>::Output: ArrayLength<u8>, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let max_digits = f.precision().unwrap_or_else(|| self.len() * 2); - let max_hex = (max_digits >> 1) + (max_digits & 1); - - if T::to_usize() < 1024 { - // For small arrays use a stack allocated - // buffer of 2x number of bytes - let mut res = GenericArray::<u8, Sum<T, T>>::default(); - - for (i, c) in self.iter().take(max_hex).enumerate() { - res[i * 2] = LOWER_CHARS[(c >> 4) as usize]; - res[i * 2 + 1] = LOWER_CHARS[(c & 0xF) as usize]; - } - f.write_str(unsafe { str::from_utf8_unchecked(&res[..max_digits]) })?; - } else { - // For large array use chunks of up to 1024 bytes (2048 hex chars) - let mut buf = [0u8; 2048]; - let mut digits_left = max_digits; - - for chunk in self[..max_hex].chunks(1024) { - for (i, c) in chunk.iter().enumerate() { - buf[i * 2] = LOWER_CHARS[(c >> 4) as usize]; - buf[i * 2 + 1] = LOWER_CHARS[(c & 0xF) as usize]; - } - let n = min(chunk.len() * 2, digits_left); - f.write_str(unsafe { str::from_utf8_unchecked(&buf[..n]) })?; - digits_left -= n; - } - } - Ok(()) - } -} - -impl<T: ArrayLength<u8>> fmt::UpperHex for GenericArray<u8, T> -where - T: Add<T>, - <T as Add<T>>::Output: ArrayLength<u8>, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let max_digits = f.precision().unwrap_or_else(|| self.len() * 2); - let max_hex = (max_digits >> 1) + (max_digits & 1); - - if T::to_usize() < 1024 { - // For small arrays use a stack allocated - // buffer of 2x number of bytes - let mut res = GenericArray::<u8, Sum<T, T>>::default(); - - for (i, c) in self.iter().take(max_hex).enumerate() { - res[i * 2] = UPPER_CHARS[(c >> 4) as usize]; - res[i * 2 + 1] = UPPER_CHARS[(c & 0xF) as usize]; - } - f.write_str(unsafe { str::from_utf8_unchecked(&res[..max_digits]) })?; - } else { - // For large array use chunks of up to 1024 bytes (2048 hex chars) - let mut buf = [0u8; 2048]; - let mut digits_left = max_digits; - - for chunk in self[..max_hex].chunks(1024) { - for (i, c) in chunk.iter().enumerate() { - buf[i * 2] = UPPER_CHARS[(c >> 4) as usize]; - buf[i * 2 + 1] = UPPER_CHARS[(c & 0xF) as usize]; - } - let n = min(chunk.len() * 2, digits_left); - f.write_str(unsafe { str::from_utf8_unchecked(&buf[..n]) })?; - digits_left -= n; - } - } - Ok(()) - } -} diff --git a/vendor/generic-array-0.12.4/src/impl_serde.rs b/vendor/generic-array-0.12.4/src/impl_serde.rs deleted file mode 100644 index da1df2fc0..000000000 --- a/vendor/generic-array-0.12.4/src/impl_serde.rs +++ /dev/null @@ -1,108 +0,0 @@ -//! Serde serialization/deserialization implementation - -use core::fmt; -use core::marker::PhantomData; -use serde::de::{self, SeqAccess, Visitor}; -use serde::{ser::SerializeTuple, Deserialize, Deserializer, Serialize, Serializer}; -use {ArrayLength, GenericArray}; - -impl<T, N> Serialize for GenericArray<T, N> -where - T: Serialize, - N: ArrayLength<T>, -{ - #[inline] - fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> - where - S: Serializer, - { - let mut tup = serializer.serialize_tuple(N::to_usize())?; - for el in self { - tup.serialize_element(el)?; - } - - tup.end() - } -} - -struct GAVisitor<T, N> { - _t: PhantomData<T>, - _n: PhantomData<N>, -} - -impl<'de, T, N> Visitor<'de> for GAVisitor<T, N> -where - T: Deserialize<'de> + Default, - N: ArrayLength<T>, -{ - type Value = GenericArray<T, N>; - - fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - formatter.write_str("struct GenericArray") - } - - fn visit_seq<A>(self, mut seq: A) -> Result<GenericArray<T, N>, A::Error> - where - A: SeqAccess<'de>, - { - let mut result = GenericArray::default(); - for i in 0..N::to_usize() { - result[i] = seq - .next_element()? - .ok_or_else(|| de::Error::invalid_length(i, &self))?; - } - Ok(result) - } -} - -impl<'de, T, N> Deserialize<'de> for GenericArray<T, N> -where - T: Deserialize<'de> + Default, - N: ArrayLength<T>, -{ - fn deserialize<D>(deserializer: D) -> Result<GenericArray<T, N>, D::Error> - where - D: Deserializer<'de>, - { - let visitor = GAVisitor { - _t: PhantomData, - _n: PhantomData, - }; - deserializer.deserialize_tuple(N::to_usize(), visitor) - } -} - -#[cfg(test)] -mod tests { - use super::*; - use bincode; - use typenum; - - #[test] - fn test_serialize() { - let array = GenericArray::<u8, typenum::U2>::default(); - let serialized = bincode::serialize(&array); - assert!(serialized.is_ok()); - } - - #[test] - fn test_deserialize() { - let mut array = GenericArray::<u8, typenum::U2>::default(); - array[0] = 1; - array[1] = 2; - let serialized = bincode::serialize(&array).unwrap(); - let deserialized = bincode::deserialize::<GenericArray<u8, typenum::U2>>(&array); - assert!(deserialized.is_ok()); - let array = deserialized.unwrap(); - assert_eq!(array[0], 1); - assert_eq!(array[1], 2); - } - - #[test] - fn test_serialized_size() { - let array = GenericArray::<u8, typenum::U1>::default(); - let size = bincode::serialized_size(&array).unwrap(); - assert_eq!(size, 1); - } - -} diff --git a/vendor/generic-array-0.12.4/src/impls.rs b/vendor/generic-array-0.12.4/src/impls.rs deleted file mode 100644 index ea5a3c4c9..000000000 --- a/vendor/generic-array-0.12.4/src/impls.rs +++ /dev/null @@ -1,182 +0,0 @@ -use super::{ArrayLength, GenericArray}; -use core::borrow::{Borrow, BorrowMut}; -use core::cmp::Ordering; -use core::fmt::{self, Debug}; -use core::hash::{Hash, Hasher}; -use functional::*; -use sequence::*; - -impl<T: Default, N> Default for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - #[inline] - fn default() -> Self { - Self::generate(|_| T::default()) - } -} - -impl<T: Clone, N> Clone for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - fn clone(&self) -> GenericArray<T, N> { - self.map(Clone::clone) - } -} - -impl<T: Copy, N> Copy for GenericArray<T, N> -where - N: ArrayLength<T>, - N::ArrayType: Copy, -{ -} - -impl<T: PartialEq, N> PartialEq for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - fn eq(&self, other: &Self) -> bool { - **self == **other - } -} -impl<T: Eq, N> Eq for GenericArray<T, N> -where - N: ArrayLength<T>, -{ -} - -impl<T: PartialOrd, N> PartialOrd for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - fn partial_cmp(&self, other: &GenericArray<T, N>) -> Option<Ordering> { - PartialOrd::partial_cmp(self.as_slice(), other.as_slice()) - } -} - -impl<T: Ord, N> Ord for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - fn cmp(&self, other: &GenericArray<T, N>) -> Ordering { - Ord::cmp(self.as_slice(), other.as_slice()) - } -} - -impl<T: Debug, N> Debug for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { - self[..].fmt(fmt) - } -} - -impl<T, N> Borrow<[T]> for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - #[inline(always)] - fn borrow(&self) -> &[T] { - &self[..] - } -} - -impl<T, N> BorrowMut<[T]> for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - #[inline(always)] - fn borrow_mut(&mut self) -> &mut [T] { - &mut self[..] - } -} - -impl<T, N> AsRef<[T]> for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - #[inline(always)] - fn as_ref(&self) -> &[T] { - &self[..] - } -} - -impl<T, N> AsMut<[T]> for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - #[inline(always)] - fn as_mut(&mut self) -> &mut [T] { - &mut self[..] - } -} - -impl<T: Hash, N> Hash for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - fn hash<H>(&self, state: &mut H) - where - H: Hasher, - { - Hash::hash(&self[..], state) - } -} - -macro_rules! impl_from { - ($($n: expr => $ty: ty),*) => { - $( - impl<T> From<[T; $n]> for GenericArray<T, $ty> { - #[inline(always)] - fn from(arr: [T; $n]) -> Self { - unsafe { $crate::transmute(arr) } - } - } - - impl<T> Into<[T; $n]> for GenericArray<T, $ty> { - #[inline(always)] - fn into(self) -> [T; $n] { - unsafe { $crate::transmute(self) } - } - } - )* - - } -} - -impl_from! { - 1 => ::typenum::U1, - 2 => ::typenum::U2, - 3 => ::typenum::U3, - 4 => ::typenum::U4, - 5 => ::typenum::U5, - 6 => ::typenum::U6, - 7 => ::typenum::U7, - 8 => ::typenum::U8, - 9 => ::typenum::U9, - 10 => ::typenum::U10, - 11 => ::typenum::U11, - 12 => ::typenum::U12, - 13 => ::typenum::U13, - 14 => ::typenum::U14, - 15 => ::typenum::U15, - 16 => ::typenum::U16, - 17 => ::typenum::U17, - 18 => ::typenum::U18, - 19 => ::typenum::U19, - 20 => ::typenum::U20, - 21 => ::typenum::U21, - 22 => ::typenum::U22, - 23 => ::typenum::U23, - 24 => ::typenum::U24, - 25 => ::typenum::U25, - 26 => ::typenum::U26, - 27 => ::typenum::U27, - 28 => ::typenum::U28, - 29 => ::typenum::U29, - 30 => ::typenum::U30, - 31 => ::typenum::U31, - 32 => ::typenum::U32 -} diff --git a/vendor/generic-array-0.12.4/src/iter.rs b/vendor/generic-array-0.12.4/src/iter.rs deleted file mode 100644 index a2d67fc67..000000000 --- a/vendor/generic-array-0.12.4/src/iter.rs +++ /dev/null @@ -1,190 +0,0 @@ -//! `GenericArray` iterator implementation. - -use super::{ArrayLength, GenericArray}; -use core::{cmp, ptr, fmt, mem}; -use core::mem::ManuallyDrop; - -/// An iterator that moves out of a `GenericArray` -pub struct GenericArrayIter<T, N: ArrayLength<T>> { - // Invariants: index <= index_back <= N - // Only values in array[index..index_back] are alive at any given time. - // Values from array[..index] and array[index_back..] are already moved/dropped. - array: ManuallyDrop<GenericArray<T, N>>, - index: usize, - index_back: usize, -} - -#[cfg(test)] -mod test { - use super::*; - - fn send<I: Send>(_iter: I) {} - - #[test] - fn test_send_iter() { - send(GenericArray::from([1, 2, 3, 4]).into_iter()); - } -} - -impl<T, N> GenericArrayIter<T, N> -where - N: ArrayLength<T>, -{ - /// Returns the remaining items of this iterator as a slice - #[inline] - pub fn as_slice(&self) -> &[T] { - &self.array.as_slice()[self.index..self.index_back] - } - - /// Returns the remaining items of this iterator as a mutable slice - #[inline] - pub fn as_mut_slice(&mut self) -> &mut [T] { - &mut self.array.as_mut_slice()[self.index..self.index_back] - } -} - -impl<T, N> IntoIterator for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - type Item = T; - type IntoIter = GenericArrayIter<T, N>; - - fn into_iter(self) -> Self::IntoIter { - GenericArrayIter { - array: ManuallyDrop::new(self), - index: 0, - index_back: N::to_usize(), - } - } -} - -// Based on work in rust-lang/rust#49000 -impl<T: fmt::Debug, N> fmt::Debug for GenericArrayIter<T, N> -where - N: ArrayLength<T>, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.debug_tuple("GenericArrayIter") - .field(&self.as_slice()) - .finish() - } -} - -impl<T, N> Drop for GenericArrayIter<T, N> -where - N: ArrayLength<T>, -{ - #[inline] - fn drop(&mut self) { - // Drop values that are still alive. - for p in self.as_mut_slice() { - unsafe { - ptr::drop_in_place(p); - } - } - } -} - -// Based on work in rust-lang/rust#49000 -impl<T: Clone, N> Clone for GenericArrayIter<T, N> -where - N: ArrayLength<T>, -{ - fn clone(&self) -> Self { - // This places all cloned elements at the start of the new array iterator, - // not at their original indices. - unsafe { - let mut iter = GenericArrayIter { - array: ManuallyDrop::new(mem::uninitialized()), - index: 0, - index_back: 0, - }; - - for (dst, src) in iter.array.iter_mut().zip(self.as_slice()) { - ptr::write(dst, src.clone()); - - iter.index_back += 1; - } - - iter - } - } -} - -impl<T, N> Iterator for GenericArrayIter<T, N> -where - N: ArrayLength<T>, -{ - type Item = T; - - #[inline] - fn next(&mut self) -> Option<T> { - if self.index < self.index_back { - let p = unsafe { Some(ptr::read(self.array.get_unchecked(self.index))) }; - - self.index += 1; - - p - } else { - None - } - } - - #[inline] - fn size_hint(&self) -> (usize, Option<usize>) { - let len = self.len(); - (len, Some(len)) - } - - #[inline] - fn count(self) -> usize { - self.len() - } - - fn nth(&mut self, n: usize) -> Option<T> { - // First consume values prior to the nth. - let ndrop = cmp::min(n, self.len()); - - for p in &mut self.array[self.index..self.index + ndrop] { - self.index += 1; - - unsafe { - ptr::drop_in_place(p); - } - } - - self.next() - } - - fn last(mut self) -> Option<T> { - // Note, everything else will correctly drop first as `self` leaves scope. - self.next_back() - } -} - -impl<T, N> DoubleEndedIterator for GenericArrayIter<T, N> -where - N: ArrayLength<T>, -{ - fn next_back(&mut self) -> Option<T> { - if self.index < self.index_back { - self.index_back -= 1; - - unsafe { Some(ptr::read(self.array.get_unchecked(self.index_back))) } - } else { - None - } - } -} - -impl<T, N> ExactSizeIterator for GenericArrayIter<T, N> -where - N: ArrayLength<T>, -{ - fn len(&self) -> usize { - self.index_back - self.index - } -} - -// TODO: Implement `FusedIterator` and `TrustedLen` when stabilized
\ No newline at end of file diff --git a/vendor/generic-array-0.12.4/src/lib.rs b/vendor/generic-array-0.12.4/src/lib.rs deleted file mode 100644 index e98e8fd58..000000000 --- a/vendor/generic-array-0.12.4/src/lib.rs +++ /dev/null @@ -1,632 +0,0 @@ -//! This crate implements a structure that can be used as a generic array type.use -//! Core Rust array types `[T; N]` can't be used generically with -//! respect to `N`, so for example this: -//! -//! ```{should_fail} -//! struct Foo<T, N> { -//! data: [T; N] -//! } -//! ``` -//! -//! won't work. -//! -//! **generic-array** exports a `GenericArray<T,N>` type, which lets -//! the above be implemented as: -//! -//! ``` -//! # use generic_array::{ArrayLength, GenericArray}; -//! struct Foo<T, N: ArrayLength<T>> { -//! data: GenericArray<T,N> -//! } -//! ``` -//! -//! The `ArrayLength<T>` trait is implemented by default for -//! [unsigned integer types](../typenum/uint/index.html) from -//! [typenum](../typenum/index.html). -//! -//! For ease of use, an `arr!` macro is provided - example below: -//! -//! ``` -//! # #[macro_use] -//! # extern crate generic_array; -//! # extern crate typenum; -//! # fn main() { -//! let array = arr![u32; 1, 2, 3]; -//! assert_eq!(array[2], 3); -//! # } -//! ``` - -#![deny(missing_docs)] -#![no_std] - -#[cfg(feature = "serde")] -extern crate serde; - -#[cfg(test)] -extern crate bincode; - -pub extern crate typenum; - -mod hex; -mod impls; - -#[cfg(feature = "serde")] -pub mod impl_serde; - -use core::iter::FromIterator; -use core::marker::PhantomData; -use core::mem::ManuallyDrop; -use core::ops::{Deref, DerefMut}; -use core::{mem, ptr, slice}; -use typenum::bit::{B0, B1}; -use typenum::uint::{UInt, UTerm, Unsigned}; - -#[cfg_attr(test, macro_use)] -pub mod arr; -pub mod functional; -pub mod iter; -pub mod sequence; - -use functional::*; -pub use iter::GenericArrayIter; -use sequence::*; - -/// Trait making `GenericArray` work, marking types to be used as length of an array -pub unsafe trait ArrayLength<T>: Unsigned { - /// Associated type representing the array type for the number - type ArrayType; -} - -unsafe impl<T> ArrayLength<T> for UTerm { - #[doc(hidden)] - type ArrayType = (); -} - -/// Internal type used to generate a struct of appropriate size -#[allow(dead_code)] -#[repr(C)] -#[doc(hidden)] -pub struct GenericArrayImplEven<T, U> { - parent1: U, - parent2: U, - _marker: PhantomData<T>, -} - -impl<T: Clone, U: Clone> Clone for GenericArrayImplEven<T, U> { - fn clone(&self) -> GenericArrayImplEven<T, U> { - GenericArrayImplEven { - parent1: self.parent1.clone(), - parent2: self.parent2.clone(), - _marker: PhantomData, - } - } -} - -impl<T: Copy, U: Copy> Copy for GenericArrayImplEven<T, U> {} - -/// Internal type used to generate a struct of appropriate size -#[allow(dead_code)] -#[repr(C)] -#[doc(hidden)] -pub struct GenericArrayImplOdd<T, U> { - parent1: U, - parent2: U, - data: T, -} - -impl<T: Clone, U: Clone> Clone for GenericArrayImplOdd<T, U> { - fn clone(&self) -> GenericArrayImplOdd<T, U> { - GenericArrayImplOdd { - parent1: self.parent1.clone(), - parent2: self.parent2.clone(), - data: self.data.clone(), - } - } -} - -impl<T: Copy, U: Copy> Copy for GenericArrayImplOdd<T, U> {} - -unsafe impl<T, N: ArrayLength<T>> ArrayLength<T> for UInt<N, B0> { - #[doc(hidden)] - type ArrayType = GenericArrayImplEven<T, N::ArrayType>; -} - -unsafe impl<T, N: ArrayLength<T>> ArrayLength<T> for UInt<N, B1> { - #[doc(hidden)] - type ArrayType = GenericArrayImplOdd<T, N::ArrayType>; -} - -/// Struct representing a generic array - `GenericArray<T, N>` works like [T; N] -#[allow(dead_code)] -pub struct GenericArray<T, U: ArrayLength<T>> { - data: U::ArrayType, -} - -unsafe impl<T: Send, N: ArrayLength<T>> Send for GenericArray<T, N> {} -unsafe impl<T: Sync, N: ArrayLength<T>> Sync for GenericArray<T, N> {} - -impl<T, N> Deref for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - type Target = [T]; - - #[inline(always)] - fn deref(&self) -> &[T] { - unsafe { slice::from_raw_parts(self as *const Self as *const T, N::to_usize()) } - } -} - -impl<T, N> DerefMut for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - #[inline(always)] - fn deref_mut(&mut self) -> &mut [T] { - unsafe { slice::from_raw_parts_mut(self as *mut Self as *mut T, N::to_usize()) } - } -} - -/// Creates an array one element at a time using a mutable iterator -/// you can write to with `ptr::write`. -/// -/// Incremenent the position while iterating to mark off created elements, -/// which will be dropped if `into_inner` is not called. -#[doc(hidden)] -pub struct ArrayBuilder<T, N: ArrayLength<T>> { - array: ManuallyDrop<GenericArray<T, N>>, - position: usize, -} - -impl<T, N: ArrayLength<T>> ArrayBuilder<T, N> { - #[doc(hidden)] - #[inline] - pub unsafe fn new() -> ArrayBuilder<T, N> { - ArrayBuilder { - array: ManuallyDrop::new(mem::uninitialized()), - position: 0, - } - } - - /// Creates a mutable iterator for writing to the array using `ptr::write`. - /// - /// Increment the position value given as a mutable reference as you iterate - /// to mark how many elements have been created. - #[doc(hidden)] - #[inline] - pub unsafe fn iter_position(&mut self) -> (slice::IterMut<T>, &mut usize) { - (self.array.iter_mut(), &mut self.position) - } - - /// When done writing (assuming all elements have been written to), - /// get the inner array. - #[doc(hidden)] - #[inline] - pub unsafe fn into_inner(self) -> GenericArray<T, N> { - let array = ptr::read(&self.array); - - mem::forget(self); - - ManuallyDrop::into_inner(array) - } -} - -impl<T, N: ArrayLength<T>> Drop for ArrayBuilder<T, N> { - fn drop(&mut self) { - for value in &mut self.array[..self.position] { - unsafe { - ptr::drop_in_place(value); - } - } - } -} - -/// Consumes an array. -/// -/// Increment the position while iterating and any leftover elements -/// will be dropped if position does not go to N -#[doc(hidden)] -pub struct ArrayConsumer<T, N: ArrayLength<T>> { - array: ManuallyDrop<GenericArray<T, N>>, - position: usize, -} - -impl<T, N: ArrayLength<T>> ArrayConsumer<T, N> { - #[doc(hidden)] - #[inline] - pub unsafe fn new(array: GenericArray<T, N>) -> ArrayConsumer<T, N> { - ArrayConsumer { - array: ManuallyDrop::new(array), - position: 0, - } - } - - /// Creates an iterator and mutable reference to the internal position - /// to keep track of consumed elements. - /// - /// Increment the position as you iterate to mark off consumed elements - #[doc(hidden)] - #[inline] - pub unsafe fn iter_position(&mut self) -> (slice::Iter<T>, &mut usize) { - (self.array.iter(), &mut self.position) - } -} - -impl<T, N: ArrayLength<T>> Drop for ArrayConsumer<T, N> { - fn drop(&mut self) { - for value in &mut self.array[self.position..N::to_usize()] { - unsafe { - ptr::drop_in_place(value); - } - } - } -} - -impl<'a, T: 'a, N> IntoIterator for &'a GenericArray<T, N> -where - N: ArrayLength<T>, -{ - type IntoIter = slice::Iter<'a, T>; - type Item = &'a T; - - fn into_iter(self: &'a GenericArray<T, N>) -> Self::IntoIter { - self.as_slice().iter() - } -} - -impl<'a, T: 'a, N> IntoIterator for &'a mut GenericArray<T, N> -where - N: ArrayLength<T>, -{ - type IntoIter = slice::IterMut<'a, T>; - type Item = &'a mut T; - - fn into_iter(self: &'a mut GenericArray<T, N>) -> Self::IntoIter { - self.as_mut_slice().iter_mut() - } -} - -impl<T, N> FromIterator<T> for GenericArray<T, N> -where - N: ArrayLength<T>, -{ - fn from_iter<I>(iter: I) -> GenericArray<T, N> - where - I: IntoIterator<Item = T>, - { - unsafe { - let mut destination = ArrayBuilder::new(); - - { - let (destination_iter, position) = destination.iter_position(); - - for (src, dst) in iter.into_iter().zip(destination_iter) { - ptr::write(dst, src); - - *position += 1; - } - } - - if destination.position < N::to_usize() { - from_iter_length_fail(destination.position, N::to_usize()); - } - - destination.into_inner() - } - } -} - -#[inline(never)] -#[cold] -fn from_iter_length_fail(length: usize, expected: usize) -> ! { - panic!( - "GenericArray::from_iter received {} elements but expected {}", - length, expected - ); -} - -unsafe impl<T, N> GenericSequence<T> for GenericArray<T, N> -where - N: ArrayLength<T>, - Self: IntoIterator<Item = T>, -{ - type Length = N; - type Sequence = Self; - - fn generate<F>(mut f: F) -> GenericArray<T, N> - where - F: FnMut(usize) -> T, - { - unsafe { - let mut destination = ArrayBuilder::new(); - - { - let (destination_iter, position) = destination.iter_position(); - - for (i, dst) in destination_iter.enumerate() { - ptr::write(dst, f(i)); - - *position += 1; - } - } - - destination.into_inner() - } - } - - #[doc(hidden)] - fn inverted_zip<B, U, F>( - self, - lhs: GenericArray<B, Self::Length>, - mut f: F, - ) -> MappedSequence<GenericArray<B, Self::Length>, B, U> - where - GenericArray<B, Self::Length>: - GenericSequence<B, Length = Self::Length> + MappedGenericSequence<B, U>, - Self: MappedGenericSequence<T, U>, - Self::Length: ArrayLength<B> + ArrayLength<U>, - F: FnMut(B, Self::Item) -> U, - { - unsafe { - let mut left = ArrayConsumer::new(lhs); - let mut right = ArrayConsumer::new(self); - - let (left_array_iter, left_position) = left.iter_position(); - let (right_array_iter, right_position) = right.iter_position(); - - FromIterator::from_iter(left_array_iter.zip(right_array_iter).map(|(l, r)| { - let left_value = ptr::read(l); - let right_value = ptr::read(r); - - *left_position += 1; - *right_position += 1; - - f(left_value, right_value) - })) - } - } - - #[doc(hidden)] - fn inverted_zip2<B, Lhs, U, F>(self, lhs: Lhs, mut f: F) -> MappedSequence<Lhs, B, U> - where - Lhs: GenericSequence<B, Length = Self::Length> + MappedGenericSequence<B, U>, - Self: MappedGenericSequence<T, U>, - Self::Length: ArrayLength<B> + ArrayLength<U>, - F: FnMut(Lhs::Item, Self::Item) -> U, - { - unsafe { - let mut right = ArrayConsumer::new(self); - - let (right_array_iter, right_position) = right.iter_position(); - - FromIterator::from_iter( - lhs.into_iter() - .zip(right_array_iter) - .map(|(left_value, r)| { - let right_value = ptr::read(r); - - *right_position += 1; - - f(left_value, right_value) - }), - ) - } - } -} - -unsafe impl<T, U, N> MappedGenericSequence<T, U> for GenericArray<T, N> -where - N: ArrayLength<T> + ArrayLength<U>, - GenericArray<U, N>: GenericSequence<U, Length = N>, -{ - type Mapped = GenericArray<U, N>; -} - -unsafe impl<T, N> FunctionalSequence<T> for GenericArray<T, N> -where - N: ArrayLength<T>, - Self: GenericSequence<T, Item = T, Length = N>, -{ - fn map<U, F>(self, mut f: F) -> MappedSequence<Self, T, U> - where - Self::Length: ArrayLength<U>, - Self: MappedGenericSequence<T, U>, - F: FnMut(T) -> U, - { - unsafe { - let mut source = ArrayConsumer::new(self); - - let (array_iter, position) = source.iter_position(); - - FromIterator::from_iter(array_iter.map(|src| { - let value = ptr::read(src); - - *position += 1; - - f(value) - })) - } - } - - #[inline] - fn zip<B, Rhs, U, F>(self, rhs: Rhs, f: F) -> MappedSequence<Self, T, U> - where - Self: MappedGenericSequence<T, U>, - Rhs: MappedGenericSequence<B, U, Mapped = MappedSequence<Self, T, U>>, - Self::Length: ArrayLength<B> + ArrayLength<U>, - Rhs: GenericSequence<B, Length = Self::Length>, - F: FnMut(T, Rhs::Item) -> U, - { - rhs.inverted_zip(self, f) - } - - fn fold<U, F>(self, init: U, mut f: F) -> U - where - F: FnMut(U, T) -> U, - { - unsafe { - let mut source = ArrayConsumer::new(self); - - let (array_iter, position) = source.iter_position(); - - array_iter.fold(init, |acc, src| { - let value = ptr::read(src); - - *position += 1; - - f(acc, value) - }) - } - } -} - -impl<T, N> GenericArray<T, N> -where - N: ArrayLength<T>, -{ - /// Extracts a slice containing the entire array. - #[inline] - pub fn as_slice(&self) -> &[T] { - self.deref() - } - - /// Extracts a mutable slice containing the entire array. - #[inline] - pub fn as_mut_slice(&mut self) -> &mut [T] { - self.deref_mut() - } - - /// Converts slice to a generic array reference with inferred length; - /// - /// Length of the slice must be equal to the length of the array. - #[inline] - pub fn from_slice(slice: &[T]) -> &GenericArray<T, N> { - slice.into() - } - - /// Converts mutable slice to a mutable generic array reference - /// - /// Length of the slice must be equal to the length of the array. - #[inline] - pub fn from_mut_slice(slice: &mut [T]) -> &mut GenericArray<T, N> { - slice.into() - } -} - -impl<'a, T, N: ArrayLength<T>> From<&'a [T]> for &'a GenericArray<T, N> { - /// Converts slice to a generic array reference with inferred length; - /// - /// Length of the slice must be equal to the length of the array. - #[inline] - fn from(slice: &[T]) -> &GenericArray<T, N> { - assert_eq!(slice.len(), N::to_usize()); - - unsafe { &*(slice.as_ptr() as *const GenericArray<T, N>) } - } -} - -impl<'a, T, N: ArrayLength<T>> From<&'a mut [T]> for &'a mut GenericArray<T, N> { - /// Converts mutable slice to a mutable generic array reference - /// - /// Length of the slice must be equal to the length of the array. - #[inline] - fn from(slice: &mut [T]) -> &mut GenericArray<T, N> { - assert_eq!(slice.len(), N::to_usize()); - - unsafe { &mut *(slice.as_mut_ptr() as *mut GenericArray<T, N>) } - } -} - -impl<T: Clone, N> GenericArray<T, N> -where - N: ArrayLength<T>, -{ - /// Construct a `GenericArray` from a slice by cloning its content - /// - /// Length of the slice must be equal to the length of the array - #[inline] - pub fn clone_from_slice(list: &[T]) -> GenericArray<T, N> { - Self::from_exact_iter(list.iter().cloned()) - .expect("Slice must be the same length as the array") - } -} - -impl<T, N> GenericArray<T, N> -where - N: ArrayLength<T>, -{ - /// Creates a new `GenericArray` instance from an iterator with a known exact size. - /// - /// Returns `None` if the size is not equal to the number of elements in the `GenericArray`. - pub fn from_exact_iter<I>(iter: I) -> Option<Self> - where - I: IntoIterator<Item = T>, - <I as IntoIterator>::IntoIter: ExactSizeIterator, - { - let iter = iter.into_iter(); - - if iter.len() == N::to_usize() { - unsafe { - let mut destination = ArrayBuilder::new(); - - { - let (destination_iter, position) = destination.iter_position(); - - for (dst, src) in destination_iter.zip(iter.into_iter()) { - ptr::write(dst, src); - - *position += 1; - } - } - - Some(destination.into_inner()) - } - } else { - None - } - } -} - -/// A reimplementation of the `transmute` function, avoiding problems -/// when the compiler can't prove equal sizes. -#[inline] -#[doc(hidden)] -pub unsafe fn transmute<A, B>(a: A) -> B { - let b = ::core::ptr::read(&a as *const A as *const B); - ::core::mem::forget(a); - b -} - -#[cfg(test)] -mod test { - // Compile with: - // cargo rustc --lib --profile test --release -- - // -C target-cpu=native -C opt-level=3 --emit asm - // and view the assembly to make sure test_assembly generates - // SIMD instructions instead of a niave loop. - - #[inline(never)] - pub fn black_box<T>(val: T) -> T { - use core::{mem, ptr}; - - let ret = unsafe { ptr::read_volatile(&val) }; - mem::forget(val); - ret - } - - #[test] - fn test_assembly() { - use functional::*; - - let a = black_box(arr![i32; 1, 3, 5, 7]); - let b = black_box(arr![i32; 2, 4, 6, 8]); - - let c = (&a).zip(b, |l, r| l + r); - - let d = a.fold(0, |a, x| a + x); - - assert_eq!(c, arr![i32; 3, 7, 11, 15]); - - assert_eq!(d, 16); - } -} diff --git a/vendor/generic-array-0.12.4/src/sequence.rs b/vendor/generic-array-0.12.4/src/sequence.rs deleted file mode 100644 index 7b928abda..000000000 --- a/vendor/generic-array-0.12.4/src/sequence.rs +++ /dev/null @@ -1,320 +0,0 @@ -//! Useful traits for manipulating sequences of data stored in `GenericArray`s - -use super::*; -use core::{mem, ptr}; -use core::ops::{Add, Sub}; -use typenum::operator_aliases::*; - -/// Defines some sequence with an associated length and iteration capabilities. -/// -/// This is useful for passing N-length generic arrays as generics. -pub unsafe trait GenericSequence<T>: Sized + IntoIterator { - /// `GenericArray` associated length - type Length: ArrayLength<T>; - - /// Concrete sequence type used in conjuction with reference implementations of `GenericSequence` - type Sequence: GenericSequence<T, Length = Self::Length> + FromIterator<T>; - - /// Initializes a new sequence instance using the given function. - /// - /// If the generator function panics while initializing the sequence, - /// any already initialized elements will be dropped. - fn generate<F>(f: F) -> Self::Sequence - where - F: FnMut(usize) -> T; - - #[doc(hidden)] - fn inverted_zip<B, U, F>( - self, - lhs: GenericArray<B, Self::Length>, - mut f: F, - ) -> MappedSequence<GenericArray<B, Self::Length>, B, U> - where - GenericArray<B, Self::Length>: GenericSequence<B, Length = Self::Length> - + MappedGenericSequence<B, U>, - Self: MappedGenericSequence<T, U>, - Self::Length: ArrayLength<B> + ArrayLength<U>, - F: FnMut(B, Self::Item) -> U, - { - unsafe { - let mut left = ArrayConsumer::new(lhs); - - let (left_array_iter, left_position) = left.iter_position(); - - FromIterator::from_iter( - left_array_iter - .zip(self.into_iter()) - .map(|(l, right_value)| { - let left_value = ptr::read(l); - - *left_position += 1; - - f(left_value, right_value) - }) - ) - } - } - - #[doc(hidden)] - fn inverted_zip2<B, Lhs, U, F>(self, lhs: Lhs, mut f: F) -> MappedSequence<Lhs, B, U> - where - Lhs: GenericSequence<B, Length = Self::Length> + MappedGenericSequence<B, U>, - Self: MappedGenericSequence<T, U>, - Self::Length: ArrayLength<B> + ArrayLength<U>, - F: FnMut(Lhs::Item, Self::Item) -> U, - { - FromIterator::from_iter(lhs.into_iter().zip(self.into_iter()).map(|(l, r)| f(l, r))) - } -} - -/// Accessor for `GenericSequence` item type, which is really `IntoIterator::Item` -/// -/// For deeply nested generic mapped sequence types, like shown in `tests/generics.rs`, -/// this can be useful for keeping things organized. -pub type SequenceItem<T> = <T as IntoIterator>::Item; - -unsafe impl<'a, T: 'a, S: GenericSequence<T>> GenericSequence<T> for &'a S -where - &'a S: IntoIterator, -{ - type Length = S::Length; - type Sequence = S::Sequence; - - #[inline] - fn generate<F>(f: F) -> Self::Sequence - where - F: FnMut(usize) -> T, - { - S::generate(f) - } -} - -unsafe impl<'a, T: 'a, S: GenericSequence<T>> GenericSequence<T> for &'a mut S -where - &'a mut S: IntoIterator, -{ - type Length = S::Length; - type Sequence = S::Sequence; - - #[inline] - fn generate<F>(f: F) -> Self::Sequence - where - F: FnMut(usize) -> T, - { - S::generate(f) - } -} - -/// Defines any `GenericSequence` which can be lengthened or extended by appending -/// or prepending an element to it. -/// -/// Any lengthened sequence can be shortened back to the original using `pop_front` or `pop_back` -pub unsafe trait Lengthen<T>: Sized + GenericSequence<T> { - /// `GenericSequence` that has one more element than `Self` - type Longer: Shorten<T, Shorter = Self>; - - /// Returns a new array with the given element appended to the end of it. - /// - /// Example: - /// - /// ```ignore - /// let a = arr![i32; 1, 2, 3]; - /// - /// let b = a.append(4); - /// - /// assert_eq!(b, arr![i32; 1, 2, 3, 4]); - /// ``` - fn append(self, last: T) -> Self::Longer; - - /// Returns a new array with the given element prepended to the front of it. - /// - /// Example: - /// - /// ```ignore - /// let a = arr![i32; 1, 2, 3]; - /// - /// let b = a.prepend(4); - /// - /// assert_eq!(b, arr![i32; 4, 1, 2, 3]); - /// ``` - fn prepend(self, first: T) -> Self::Longer; -} - -/// Defines a `GenericSequence` which can be shortened by removing the first or last element from it. -/// -/// Additionally, any shortened sequence can be lengthened by -/// appending or prepending an element to it. -pub unsafe trait Shorten<T>: Sized + GenericSequence<T> { - /// `GenericSequence` that has one less element than `Self` - type Shorter: Lengthen<T, Longer = Self>; - - /// Returns a new array without the last element, and the last element. - /// - /// Example: - /// - /// ```ignore - /// let a = arr![i32; 1, 2, 3, 4]; - /// - /// let (init, last) = a.pop_back(); - /// - /// assert_eq!(init, arr![i32; 1, 2, 3]); - /// assert_eq!(last, 4); - /// ``` - fn pop_back(self) -> (Self::Shorter, T); - - /// Returns a new array without the first element, and the first element. - /// Example: - /// - /// ```ignore - /// let a = arr![i32; 1, 2, 3, 4]; - /// - /// let (head, tail) = a.pop_front(); - /// - /// assert_eq!(head, 1); - /// assert_eq!(tail, arr![i32; 2, 3, 4]); - /// ``` - fn pop_front(self) -> (T, Self::Shorter); -} - -unsafe impl<T, N: ArrayLength<T>> Lengthen<T> for GenericArray<T, N> -where - N: Add<B1>, - Add1<N>: ArrayLength<T>, - Add1<N>: Sub<B1, Output = N>, - Sub1<Add1<N>>: ArrayLength<T>, -{ - type Longer = GenericArray<T, Add1<N>>; - - fn append(self, last: T) -> Self::Longer { - let mut longer: Self::Longer = unsafe { mem::uninitialized() }; - - unsafe { - ptr::write(longer.as_mut_ptr() as *mut _, self); - ptr::write(&mut longer[N::to_usize()], last); - } - - longer - } - - fn prepend(self, first: T) -> Self::Longer { - let mut longer: Self::Longer = unsafe { mem::uninitialized() }; - - let longer_ptr = longer.as_mut_ptr(); - - unsafe { - ptr::write(longer_ptr as *mut _, first); - ptr::write(longer_ptr.offset(1) as *mut _, self); - } - - longer - } -} - -unsafe impl<T, N: ArrayLength<T>> Shorten<T> for GenericArray<T, N> -where - N: Sub<B1>, - Sub1<N>: ArrayLength<T>, - Sub1<N>: Add<B1, Output = N>, - Add1<Sub1<N>>: ArrayLength<T>, -{ - type Shorter = GenericArray<T, Sub1<N>>; - - fn pop_back(self) -> (Self::Shorter, T) { - let init_ptr = self.as_ptr(); - let last_ptr = unsafe { init_ptr.offset(Sub1::<N>::to_usize() as isize) }; - - let init = unsafe { ptr::read(init_ptr as _) }; - let last = unsafe { ptr::read(last_ptr as _) }; - - mem::forget(self); - - (init, last) - } - - fn pop_front(self) -> (T, Self::Shorter) { - let head_ptr = self.as_ptr(); - let tail_ptr = unsafe { head_ptr.offset(1) }; - - let head = unsafe { ptr::read(head_ptr as _) }; - let tail = unsafe { ptr::read(tail_ptr as _) }; - - mem::forget(self); - - (head, tail) - } -} - -/// Defines a `GenericSequence` that can be split into two parts at a given pivot index. -pub unsafe trait Split<T, K>: GenericSequence<T> -where - K: ArrayLength<T>, -{ - /// First part of the resulting split array - type First: GenericSequence<T>; - /// Second part of the resulting split array - type Second: GenericSequence<T>; - - /// Splits an array at the given index, returning the separate parts of the array. - fn split(self) -> (Self::First, Self::Second); -} - -unsafe impl<T, N, K> Split<T, K> for GenericArray<T, N> -where - N: ArrayLength<T>, - K: ArrayLength<T>, - N: Sub<K>, - Diff<N, K>: ArrayLength<T>, -{ - type First = GenericArray<T, K>; - type Second = GenericArray<T, Diff<N, K>>; - - fn split(self) -> (Self::First, Self::Second) { - let head_ptr = self.as_ptr(); - let tail_ptr = unsafe { head_ptr.offset(K::to_usize() as isize) }; - - let head = unsafe { ptr::read(head_ptr as _) }; - let tail = unsafe { ptr::read(tail_ptr as _) }; - - mem::forget(self); - - (head, tail) - } -} - -/// Defines `GenericSequence`s which can be joined together, forming a larger array. -pub unsafe trait Concat<T, M>: GenericSequence<T> -where - M: ArrayLength<T>, -{ - /// Sequence to be concatenated with `self` - type Rest: GenericSequence<T, Length = M>; - - /// Resulting sequence formed by the concatenation. - type Output: GenericSequence<T>; - - /// Concatenate, or join, two sequences. - fn concat(self, rest: Self::Rest) -> Self::Output; -} - -unsafe impl<T, N, M> Concat<T, M> for GenericArray<T, N> -where - N: ArrayLength<T> + Add<M>, - M: ArrayLength<T>, - Sum<N, M>: ArrayLength<T>, -{ - type Rest = GenericArray<T, M>; - type Output = GenericArray<T, Sum<N, M>>; - - fn concat(self, rest: Self::Rest) -> Self::Output { - let mut output: Self::Output = unsafe { mem::uninitialized() }; - - let output_ptr = output.as_mut_ptr(); - - unsafe { - ptr::write(output_ptr as *mut _, self); - ptr::write(output_ptr.offset(N::to_usize() as isize) as *mut _, rest); - } - - output - } -} |