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use core::pin::Pin;
use array_trait::Array;
use slice_ops::AsSlice;
use super::ArrayEnumerateMap;
#[const_trait]
pub trait ArrayEnumerate<T, const N: usize>: Array + AsSlice<Item = T>
{
/// Enumerates each element in the array.
///
/// # Examples
///
/// ```rust
/// use array__ops::ops::*;
///
/// let a = ["zero", "one", "two", "three", "four", "five"];
///
/// let ea = a.enumerate();
///
/// assert_eq!(ea, [(0, "zero"), (1, "one"), (2, "two"), (3, "three"), (4, "four"), (5, "five")]);
/// ```
fn enumerate(self) -> [(usize, T); N];
/// Enumerates each element in the array passed as reference.
///
/// # Examples
///
/// ```rust
/// use array__ops::ops::*;
///
/// let a = ["zero", "one", "two", "three", "four", "five"];
///
/// let ea = a.enumerate_ref();
///
/// assert_eq!(ea, [(0, &"zero"), (1, &"one"), (2, &"two"), (3, &"three"), (4, &"four"), (5, &"five")]);
/// ```
fn enumerate_ref(&self) -> [(usize, &T); N];
/// Enumerates each element in the array passed as mutable reference.
///
/// # Examples
///
/// ```rust
/// use array__ops::ops::*;
///
/// let mut a = ["zero", "one", "two", "three", "four", "five"];
///
/// let ea = a.enumerate_mut();
///
/// for (e, a) in ea
/// {
/// *a = e.to_string().leak();
/// }
///
/// assert_eq!(a, ["0", "1", "2", "3", "4", "5"]);
/// ```
fn enumerate_mut(&mut self) -> [(usize, &mut T); N];
/// Enumerates each element in the array passed as pinned reference.
///
/// # Examples
///
/// ```rust
/// use array__ops::ops::*;
///
/// use core::pin::Pin;
///
/// let a = Pin::new(&["zero", "one", "two", "three", "four", "five"]);
///
/// let ea = a.as_ref().enumerate_pin_ref();
///
/// assert_eq!(ea, [(0, Pin::new(&"zero")), (1, Pin::new(&"one")), (2, Pin::new(&"two")), (3, Pin::new(&"three")), (4, Pin::new(&"four")), (5, Pin::new(&"five"))]);
/// ```
fn enumerate_pin_ref(self: Pin<&Self>) -> [(usize, Pin<&T>); N];
/// Enumerates each element in the array passed as mutable pinned reference.
///
/// # Examples
///
/// ```rust
/// use array__ops::ops::*;
///
/// use core::pin::pin;
///
/// let mut a = pin!(["zero", "one", "two", "three", "four", "five"]);
///
/// let ea = a.as_mut().enumerate_pin_mut();
///
/// for (e, mut a) in ea
/// {
/// *a = e.to_string().leak();
/// }
///
/// assert_eq!(a, pin!(["0", "1", "2", "3", "4", "5"]));
/// ```
fn enumerate_pin_mut(self: Pin<&mut Self>) -> [(usize, Pin<&mut T>); N];
}
impl<T, const N: usize> ArrayEnumerate<T, N> for [T; N]
{
fn enumerate(self) -> [(usize, T); N]
{
self.enumerate_map(|i, x| (i, x))
}
fn enumerate_ref(&self) -> [(usize, &T); N]
{
self.enumerate_map_ref(|i, x| (i, x))
}
fn enumerate_mut(&mut self) -> [(usize, &mut T); N]
{
self.enumerate_map_mut(|i, x| (i, x))
}
fn enumerate_pin_ref(self: Pin<&Self>) -> [(usize, Pin<&T>); N]
{
self.enumerate_map_pin_ref(|i, x| (i, x))
}
fn enumerate_pin_mut(self: Pin<&mut Self>) -> [(usize, Pin<&mut T>); N]
{
self.enumerate_map_pin_mut(|i, x| (i, x))
}
}
#[cfg(test)]
mod test
{
use super::ArrayEnumerate;
#[test]
fn test()
{
use core::pin::pin;
let mut a = pin!(["zero", "one", "two", "three", "four", "five"]);
let ea = a.as_mut().enumerate_pin_mut();
for (e, mut a) in ea
{
*a = e.to_string().leak();
}
assert_eq!(a, pin!(["0", "1", "2", "3", "4", "5"]));
}
}