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use iter_columns_derive::IterColumns;
#[cfg(not(feature = "no_array"))]
use iter_columns_derive::IterColumnsArray;
pub struct ColumnsIntoIterVec<T> {
arr: Vec<Vec<T>>,
len: usize,
index: usize,
}
impl<T: Default> Iterator for ColumnsIntoIterVec<T> {
type Item = Vec<T>;
fn next(&mut self) -> Option<Self::Item> {
if self.index == self.len {
return None;
}
let index = self.index;
let column = self
.arr
.iter_mut()
.filter_map(move |row| {
if row.get(index).is_some() {
Some(std::mem::take(&mut row[index]))
} else {
None
}
})
.collect();
self.index += 1;
Some(column)
}
}
pub trait ColExtIntoIterVec<T>: Iterator<Item = Vec<T>> {
fn columns(self) -> ColumnsIntoIterVec<T>
where
Self: Sized,
{
let arr: Vec<Vec<T>> = self.collect();
let len = arr.iter().map(|row| row.len()).max().unwrap_or(0);
ColumnsIntoIterVec { arr, len, index: 0 }
}
fn columns_options(self) -> ColumnsOptionsIntoIterVec<T>
where
Self: Sized,
{
let arr: Vec<Vec<T>> = self.collect();
let len = arr.iter().map(|row| row.len()).max().unwrap_or(0);
ColumnsOptionsIntoIterVec { arr, len, index: 0 }
}
}
impl<T, I: Iterator<Item = Vec<T>>> ColExtIntoIterVec<T> for I {}
pub struct ColumnsOptionsIntoIterVec<T> {
arr: Vec<Vec<T>>,
len: usize,
index: usize,
}
impl<T: Default> Iterator for ColumnsOptionsIntoIterVec<T> {
type Item = Vec<Option<T>>;
fn next(&mut self) -> Option<Self::Item> {
if self.index == self.len {
return None;
}
let index = self.index;
let column = self
.arr
.iter_mut()
.map(move |row| {
if row.get(index).is_some() {
Some(std::mem::take(&mut row[index]))
} else {
None
}
})
.collect();
self.index += 1;
Some(column)
}
}
#[cfg(not(feature = "no_array"))]
pub struct ColumnsIntoIterArray<T, const N: usize> {
arr: Vec<[T; N]>,
len: usize,
index: usize,
}
#[cfg(not(feature = "no_array"))]
impl<T: Default, const N: usize> Iterator for ColumnsIntoIterArray<T, N> {
type Item = Vec<T>;
fn next(&mut self) -> Option<Self::Item> {
if self.index == self.len {
return None;
}
let index = self.index;
let column = self
.arr
.iter_mut()
.filter_map(move |row| {
if row.as_ref().get(index).is_some() {
Some(std::mem::take(&mut row[index]))
} else {
None
}
})
.collect();
self.index += 1;
Some(column)
}
}
#[cfg(not(feature = "no_array"))]
pub trait ColExtIntoIterArray<T, const N: usize>: Iterator<Item = [T; N]> {
fn columns(self) -> ColumnsIntoIterArray<T, N>
where
Self: Sized,
{
let arr: Vec<[T; N]> = self.collect();
let len = N;
ColumnsIntoIterArray { arr, len, index: 0 }
}
}
#[cfg(not(feature = "no_array"))]
impl<T, I: Iterator<Item = [T; N]>, const N: usize> ColExtIntoIterArray<T, N> for I {}
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed1<'a, T>(&'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed2<'a, T>(&'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed3<'a, T>(&'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed4<'a, T>(&'a &'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed5<'a, T>(&'a &'a &'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed6<'a, T>(&'a &'a &'a &'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed7<'a, T>(&'a &'a &'a &'a &'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed8<'a, T>(&'a &'a &'a &'a &'a &'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed9<'a, T>(&'a &'a &'a &'a &'a &'a &'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsVecBorrowed10<'a, T>(&'a &'a &'a &'a &'a &'a &'a &'a &'a &'a Vec<T>);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed1<'a, T>(&'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed2<'a, T>(&'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed3<'a, T>(&'a &'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed4<'a, T>(&'a &'a &'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed5<'a, T>(&'a &'a &'a &'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed6<'a, T>(&'a &'a &'a &'a &'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed7<'a, T>(&'a &'a &'a &'a &'a &'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed8<'a, T>(&'a &'a &'a &'a &'a &'a &'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed9<'a, T>(&'a &'a &'a &'a &'a &'a &'a &'a &'a [T]);
#[allow(dead_code)]
#[derive(IterColumns)]
struct IterColumnsSliceBorrowed10<'a, T>(&'a &'a &'a &'a &'a &'a &'a &'a &'a &'a [T]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed1<'a, T, const N: usize>(&'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed2<'a, T, const N: usize>(&'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed3<'a, T, const N: usize>(&'a &'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed4<'a, T, const N: usize>(&'a &'a &'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed5<'a, T, const N: usize>(&'a &'a &'a &'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed6<'a, T, const N: usize>(&'a &'a &'a &'a &'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed7<'a, T, const N: usize>(&'a &'a &'a &'a &'a &'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed8<'a, T, const N: usize>(&'a &'a &'a &'a &'a &'a &'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed9<'a, T, const N: usize>(&'a &'a &'a &'a &'a &'a &'a &'a &'a [T; N]);
#[allow(dead_code)]
#[cfg(not(feature = "no_array"))]
#[derive(IterColumnsArray)]
struct IterColumnsArrayBorrowed10<'a, T, const N: usize>(&'a &'a &'a &'a &'a &'a &'a &'a &'a &'a [T; N]);