libutils_log/
iterators.rs

1//^
2//^ HEAD
3//^
4
5//> HEAD -> SUPER
6use super::Log;
7
8//> HEAD -> CORE
9use core::{
10    slice::Iter,
11    mem::ManuallyDrop,
12    alloc::{
13        Layout,
14        Allocator
15    }
16};
17
18//> HEAD -> POINTER
19use libutils_pointer::Pointer;
20
21//> HEAD -> ALLOC
22use alloc::alloc::Global;
23
24
25//^
26//^ ITERATORS
27//^
28
29//> ITERABLE
30pub struct Iterable<Type> {
31    pointer: Pointer<Type>,
32    length: usize,
33    index: usize,
34    layout: Layout
35} impl<Type> Iterator for Iterable<Type> {
36    type Item = Type;
37    #[inline]
38    fn next(&mut self) -> Option<Self::Item> {
39        let value = if self.index < self.length {
40            Some(unsafe {self.pointer.add(self.index).read()?})
41        } else {None};
42        self.index += 1;
43        return value;
44    }
45} impl<Type> Drop for Iterable<Type> {
46    fn drop(&mut self) {
47        while let Some(_) = self.next() {}
48        if let Some(pointer) = self.pointer.take() {
49            unsafe {Global.deallocate(pointer.cast(), self.layout)}
50        }
51    }
52}
53
54//> ITERATORS -> FROM
55impl<Type> FromIterator<Type> for Log<Type> {
56    fn from_iter<T: IntoIterator<Item = Type>>(iter: T) -> Self {
57        let mut log = Log::new();
58        log.extend(iter);
59        return log;
60    }
61}
62
63//> ITERATORS -> INTO ITERATOR
64const impl<Type> IntoIterator for Log<Type> {
65    type Item = Type;
66    type IntoIter = Iterable<Type>;
67    fn into_iter(self) -> Self::IntoIter {
68        let instance = ManuallyDrop::new(self);
69        return Iterable {
70            pointer: instance.pointer,
71            length: instance.length,
72            index: 0,
73            layout: unsafe {Layout::from_size_align(instance.capacity * size_of::<Type>(), align_of::<Type>()).unwrap_unchecked()}
74        }
75    }
76}
77
78//> ITERATORS -> BORROWED
79const impl<'valid, Type> IntoIterator for &'valid Log<Type> {
80    type Item = &'valid Type;
81    type IntoIter = Iter<'valid, Type>;
82    fn into_iter(self) -> Self::IntoIter {self.iter()}
83}
libutils_log/iterators.rs

libutils_log/
iterators.rs
