Trait wasmtime_environ::__core::prelude::rust_2018::IntoIterator
1.0.0 · source · [−]pub trait IntoIterator {
type Item;
type IntoIter: Iterator
where
<Self::IntoIter as Iterator>::Item == Self::Item;
fn into_iter(self) -> Self::IntoIter;
}
Expand description
Conversion into an Iterator
.
By implementing IntoIterator
for a type, you define how it will be
converted to an iterator. This is common for types which describe a
collection of some kind.
One benefit of implementing IntoIterator
is that your type will work
with Rust’s for
loop syntax.
See also: FromIterator
.
Examples
Basic usage:
let v = [1, 2, 3];
let mut iter = v.into_iter();
assert_eq!(Some(1), iter.next());
assert_eq!(Some(2), iter.next());
assert_eq!(Some(3), iter.next());
assert_eq!(None, iter.next());
Implementing IntoIterator
for your type:
// A sample collection, that's just a wrapper over Vec<T>
#[derive(Debug)]
struct MyCollection(Vec<i32>);
// Let's give it some methods so we can create one and add things
// to it.
impl MyCollection {
fn new() -> MyCollection {
MyCollection(Vec::new())
}
fn add(&mut self, elem: i32) {
self.0.push(elem);
}
}
// and we'll implement IntoIterator
impl IntoIterator for MyCollection {
type Item = i32;
type IntoIter = std::vec::IntoIter<Self::Item>;
fn into_iter(self) -> Self::IntoIter {
self.0.into_iter()
}
}
// Now we can make a new collection...
let mut c = MyCollection::new();
// ... add some stuff to it ...
c.add(0);
c.add(1);
c.add(2);
// ... and then turn it into an Iterator:
for (i, n) in c.into_iter().enumerate() {
assert_eq!(i as i32, n);
}
It is common to use IntoIterator
as a trait bound. This allows
the input collection type to change, so long as it is still an
iterator. Additional bounds can be specified by restricting on
Item
:
fn collect_as_strings<T>(collection: T) -> Vec<String>
where
T: IntoIterator,
T::Item: std::fmt::Debug,
{
collection
.into_iter()
.map(|item| format!("{item:?}"))
.collect()
}
Associated Types
Required methods
Creates an iterator from a value.
See the module-level documentation for more.
Examples
Basic usage:
let v = [1, 2, 3];
let mut iter = v.into_iter();
assert_eq!(Some(1), iter.next());
assert_eq!(Some(2), iter.next());
assert_eq!(Some(3), iter.next());
assert_eq!(None, iter.next());
Implementations on Foreign Types
1.1.0 · sourceimpl<T> IntoIterator for Receiver<T>
impl<T> IntoIterator for Receiver<T>
sourceimpl<'a, K, V, S> IntoIterator for &'a HashMap<K, V, S>
impl<'a, K, V, S> IntoIterator for &'a HashMap<K, V, S>
sourceimpl<K, V, S> IntoIterator for HashMap<K, V, S>
impl<K, V, S> IntoIterator for HashMap<K, V, S>
sourcefn into_iter(self) -> IntoIter<K, V>ⓘNotable traits for IntoIter<K, V>impl<K, V> Iterator for IntoIter<K, V> type Item = (K, V);
fn into_iter(self) -> IntoIter<K, V>ⓘNotable traits for IntoIter<K, V>impl<K, V> Iterator for IntoIter<K, V> type Item = (K, V);
Creates a consuming iterator, that is, one that moves each key-value pair out of the map in arbitrary order. The map cannot be used after calling this.
Examples
use std::collections::HashMap;
let map = HashMap::from([
("a", 1),
("b", 2),
("c", 3),
]);
// Not possible with .iter()
let vec: Vec<(&str, i32)> = map.into_iter().collect();
type Item = (K, V)
type IntoIter = IntoIter<K, V>
1.10.0 · sourceimpl<'a> IntoIterator for &'a UnixListener
impl<'a> IntoIterator for &'a UnixListener
1.6.0 · sourceimpl<'a> IntoIterator for &'a Path
impl<'a> IntoIterator for &'a Path
sourceimpl<'a, K, V, S> IntoIterator for &'a mut HashMap<K, V, S>
impl<'a, K, V, S> IntoIterator for &'a mut HashMap<K, V, S>
1.6.0 · sourceimpl<'a> IntoIterator for &'a PathBuf
impl<'a> IntoIterator for &'a PathBuf
sourceimpl<T, S> IntoIterator for HashSet<T, S>
impl<T, S> IntoIterator for HashSet<T, S>
sourcefn into_iter(self) -> IntoIter<T>ⓘNotable traits for IntoIter<K>impl<K> Iterator for IntoIter<K> type Item = K;
fn into_iter(self) -> IntoIter<T>ⓘNotable traits for IntoIter<K>impl<K> Iterator for IntoIter<K> type Item = K;
Creates a consuming iterator, that is, one that moves each value out of the set in arbitrary order. The set cannot be used after calling this.
Examples
use std::collections::HashSet;
let mut set = HashSet::new();
set.insert("a".to_string());
set.insert("b".to_string());
// Not possible to collect to a Vec<String> with a regular `.iter()`.
let v: Vec<String> = set.into_iter().collect();
// Will print in an arbitrary order.
for x in &v {
println!("{x}");
}
type Item = T
type IntoIter = IntoIter<T>
sourceimpl<'a, T, S> IntoIterator for &'a HashSet<T, S>
impl<'a, T, S> IntoIterator for &'a HashSet<T, S>
1.1.0 · sourceimpl<'a, T> IntoIterator for &'a Receiver<T>
impl<'a, T> IntoIterator for &'a Receiver<T>
sourceimpl<'a, T, const N: usize> IntoIterator for &'a mut [T; N]
impl<'a, T, const N: usize> IntoIterator for &'a mut [T; N]
sourceimpl<'a, T> IntoIterator for &'a [T]
impl<'a, T> IntoIterator for &'a [T]
sourceimpl<'a, T> IntoIterator for &'a mut [T]
impl<'a, T> IntoIterator for &'a mut [T]
1.53.0 · sourceimpl<T, const N: usize> IntoIterator for [T; N]
impl<T, const N: usize> IntoIterator for [T; N]
sourcefn into_iter(self) -> <[T; N] as IntoIterator>::IntoIter
fn into_iter(self) -> <[T; N] as IntoIterator>::IntoIter
Creates a consuming iterator, that is, one that moves each value out of
the array (from start to end). The array cannot be used after calling
this unless T
implements Copy
, so the whole array is copied.
Arrays have special behavior when calling .into_iter()
prior to the
2021 edition – see the array Editions section for more information.
type Item = T
type IntoIter = IntoIter<T, N>
sourceimpl<'a, T, const N: usize> IntoIterator for &'a [T; N]
impl<'a, T, const N: usize> IntoIterator for &'a [T; N]
sourceimpl<'a, T, A> IntoIterator for &'a Vec<T, A> where
A: Allocator,
impl<'a, T, A> IntoIterator for &'a Vec<T, A> where
A: Allocator,
sourceimpl<T> IntoIterator for LinkedList<T>
impl<T> IntoIterator for LinkedList<T>
sourceimpl<'a, T, A> IntoIterator for &'a mut Vec<T, A> where
A: Allocator,
impl<'a, T, A> IntoIterator for &'a mut Vec<T, A> where
A: Allocator,
sourceimpl<T> IntoIterator for BinaryHeap<T>
impl<T> IntoIterator for BinaryHeap<T>
sourcefn into_iter(self) -> IntoIter<T>ⓘNotable traits for IntoIter<T>impl<T> Iterator for IntoIter<T> type Item = T;
fn into_iter(self) -> IntoIter<T>ⓘNotable traits for IntoIter<T>impl<T> Iterator for IntoIter<T> type Item = T;
Creates a consuming iterator, that is, one that moves each value out of the binary heap in arbitrary order. The binary heap cannot be used after calling this.
Examples
Basic usage:
use std::collections::BinaryHeap;
let heap = BinaryHeap::from([1, 2, 3, 4]);
// Print 1, 2, 3, 4 in arbitrary order
for x in heap.into_iter() {
// x has type i32, not &i32
println!("{x}");
}
type Item = T
type IntoIter = IntoIter<T>
sourceimpl<T, A> IntoIterator for VecDeque<T, A> where
A: Allocator,
impl<T, A> IntoIterator for VecDeque<T, A> where
A: Allocator,
sourceimpl<K, V> IntoIterator for BTreeMap<K, V>
impl<K, V> IntoIterator for BTreeMap<K, V>
sourceimpl<'a, T> IntoIterator for &'a BinaryHeap<T>
impl<'a, T> IntoIterator for &'a BinaryHeap<T>
sourceimpl<T> IntoIterator for BTreeSet<T>
impl<T> IntoIterator for BTreeSet<T>
sourcefn into_iter(self) -> IntoIter<T>ⓘNotable traits for IntoIter<T>impl<T> Iterator for IntoIter<T> type Item = T;
fn into_iter(self) -> IntoIter<T>ⓘNotable traits for IntoIter<T>impl<T> Iterator for IntoIter<T> type Item = T;
Gets an iterator for moving out the BTreeSet
’s contents.
Examples
use std::collections::BTreeSet;
let set = BTreeSet::from([1, 2, 3, 4]);
let v: Vec<_> = set.into_iter().collect();
assert_eq!(v, [1, 2, 3, 4]);
type Item = T
type IntoIter = IntoIter<T>
sourceimpl<'a, T> IntoIterator for &'a BTreeSet<T>
impl<'a, T> IntoIterator for &'a BTreeSet<T>
sourceimpl<'a, K, V> IntoIterator for &'a BTreeMap<K, V>
impl<'a, K, V> IntoIterator for &'a BTreeMap<K, V>
sourceimpl<'a, T, A> IntoIterator for &'a VecDeque<T, A> where
A: Allocator,
impl<'a, T, A> IntoIterator for &'a VecDeque<T, A> where
A: Allocator,
sourceimpl<'a, T> IntoIterator for &'a LinkedList<T>
impl<'a, T> IntoIterator for &'a LinkedList<T>
sourceimpl<'a, K, V> IntoIterator for &'a mut BTreeMap<K, V>
impl<'a, K, V> IntoIterator for &'a mut BTreeMap<K, V>
sourceimpl<T, A> IntoIterator for Vec<T, A> where
A: Allocator,
impl<T, A> IntoIterator for Vec<T, A> where
A: Allocator,
sourcefn into_iter(self) -> IntoIter<T, A>ⓘNotable traits for IntoIter<T, A>impl<T, A> Iterator for IntoIter<T, A> where
A: Allocator, type Item = T;
fn into_iter(self) -> IntoIter<T, A>ⓘNotable traits for IntoIter<T, A>impl<T, A> Iterator for IntoIter<T, A> where
A: Allocator, type Item = T;
A: Allocator, type Item = T;
Creates a consuming iterator, that is, one that moves each value out of the vector (from start to end). The vector cannot be used after calling this.
Examples
let v = vec!["a".to_string(), "b".to_string()];
for s in v.into_iter() {
// s has type String, not &String
println!("{s}");
}
type Item = T
type IntoIter = IntoIter<T, A>
sourceimpl<'a, T> IntoIterator for &'a mut LinkedList<T>
impl<'a, T> IntoIterator for &'a mut LinkedList<T>
sourceimpl<'a, T, A> IntoIterator for &'a mut VecDeque<T, A> where
A: Allocator,
impl<'a, T, A> IntoIterator for &'a mut VecDeque<T, A> where
A: Allocator,
sourceimpl<K, V, S> IntoIterator for IndexMap<K, V, S>
impl<K, V, S> IntoIterator for IndexMap<K, V, S>
sourceimpl<'a, K, V, S> IntoIterator for &'a IndexMap<K, V, S>
impl<'a, K, V, S> IntoIterator for &'a IndexMap<K, V, S>
sourceimpl<'a, K, V, S> IntoIterator for &'a mut IndexMap<K, V, S>
impl<'a, K, V, S> IntoIterator for &'a mut IndexMap<K, V, S>
sourceimpl<'a, T, S> IntoIterator for &'a IndexSet<T, S>
impl<'a, T, S> IntoIterator for &'a IndexSet<T, S>
sourceimpl<T, S> IntoIterator for IndexSet<T, S>
impl<T, S> IntoIterator for IndexSet<T, S>
sourceimpl<'a, K, V, S, A> IntoIterator for &'a mut HashMap<K, V, S, A> where
A: Allocator + Clone,
impl<'a, K, V, S, A> IntoIterator for &'a mut HashMap<K, V, S, A> where
A: Allocator + Clone,
sourceimpl<T, S, A> IntoIterator for HashSet<T, S, A> where
A: Allocator + Clone,
impl<T, S, A> IntoIterator for HashSet<T, S, A> where
A: Allocator + Clone,
sourcefn into_iter(self) -> IntoIter<T, A>ⓘNotable traits for IntoIter<K, A>impl<K, A> Iterator for IntoIter<K, A> where
A: Allocator + Clone, type Item = K;
fn into_iter(self) -> IntoIter<T, A>ⓘNotable traits for IntoIter<K, A>impl<K, A> Iterator for IntoIter<K, A> where
A: Allocator + Clone, type Item = K;
A: Allocator + Clone, type Item = K;
Creates a consuming iterator, that is, one that moves each value out of the set in arbitrary order. The set cannot be used after calling this.
Examples
use hashbrown::HashSet;
let mut set = HashSet::new();
set.insert("a".to_string());
set.insert("b".to_string());
// Not possible to collect to a Vec<String> with a regular `.iter()`.
let v: Vec<String> = set.into_iter().collect();
// Will print in an arbitrary order.
for x in &v {
println!("{}", x);
}
type Item = T
type IntoIter = IntoIter<T, A>
sourceimpl<'a, K, V, S, A> IntoIterator for &'a HashMap<K, V, S, A> where
A: Allocator + Clone,
impl<'a, K, V, S, A> IntoIterator for &'a HashMap<K, V, S, A> where
A: Allocator + Clone,
sourceimpl<'a, T, S, A> IntoIterator for &'a HashSet<T, S, A> where
A: Allocator + Clone,
impl<'a, T, S, A> IntoIterator for &'a HashSet<T, S, A> where
A: Allocator + Clone,
sourceimpl<T, A> IntoIterator for RawTable<T, A> where
A: Allocator + Clone,
impl<T, A> IntoIterator for RawTable<T, A> where
A: Allocator + Clone,
type Item = T
type IntoIter = RawIntoIter<T, A>
fn into_iter(self) -> RawIntoIter<T, A>ⓘNotable traits for RawIntoIter<T, A>impl<T, A> Iterator for RawIntoIter<T, A> where
A: Allocator + Clone, type Item = T;
A: Allocator + Clone, type Item = T;
sourceimpl<K, V, S, A> IntoIterator for HashMap<K, V, S, A> where
A: Allocator + Clone,
impl<K, V, S, A> IntoIterator for HashMap<K, V, S, A> where
A: Allocator + Clone,
sourcefn into_iter(self) -> IntoIter<K, V, A>ⓘNotable traits for IntoIter<K, V, A>impl<K, V, A> Iterator for IntoIter<K, V, A> where
A: Allocator + Clone, type Item = (K, V);
fn into_iter(self) -> IntoIter<K, V, A>ⓘNotable traits for IntoIter<K, V, A>impl<K, V, A> Iterator for IntoIter<K, V, A> where
A: Allocator + Clone, type Item = (K, V);
A: Allocator + Clone, type Item = (K, V);
Creates a consuming iterator, that is, one that moves each key-value pair out of the map in arbitrary order. The map cannot be used after calling this.
Examples
use hashbrown::HashMap;
let mut map = HashMap::new();
map.insert("a", 1);
map.insert("b", 2);
map.insert("c", 3);
// Not possible with .iter()
let vec: Vec<(&str, i32)> = map.into_iter().collect();
type Item = (K, V)
type IntoIter = IntoIter<K, V, A>
Implementors
sourceimpl<'a> IntoIterator for AliasSectionReader<'a>
impl<'a> IntoIterator for AliasSectionReader<'a>
type Item = Result<Alias<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<AliasSectionReader<'a>>
sourceimpl<'a> IntoIterator for CodeSectionReader<'a>
impl<'a> IntoIterator for CodeSectionReader<'a>
type Item = Result<FunctionBody<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<CodeSectionReader<'a>>
sourceimpl<'a> IntoIterator for ComponentAliasSectionReader<'a>
impl<'a> IntoIterator for ComponentAliasSectionReader<'a>
type Item = Result<ComponentAlias<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ComponentAliasSectionReader<'a>>
sourceimpl<'a> IntoIterator for ComponentCanonicalSectionReader<'a>
impl<'a> IntoIterator for ComponentCanonicalSectionReader<'a>
sourceimpl<'a> IntoIterator for ComponentExportSectionReader<'a>
impl<'a> IntoIterator for ComponentExportSectionReader<'a>
type Item = Result<ComponentExport<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ComponentExportSectionReader<'a>>
sourceimpl<'a> IntoIterator for ComponentImportSectionReader<'a>
impl<'a> IntoIterator for ComponentImportSectionReader<'a>
type Item = Result<ComponentImport<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ComponentImportSectionReader<'a>>
sourceimpl<'a> IntoIterator for ComponentInstanceSectionReader<'a>
impl<'a> IntoIterator for ComponentInstanceSectionReader<'a>
type Item = Result<ComponentInstance<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ComponentInstanceSectionReader<'a>>
sourceimpl<'a> IntoIterator for ComponentTypeSectionReader<'a>
impl<'a> IntoIterator for ComponentTypeSectionReader<'a>
type Item = Result<ComponentType<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ComponentTypeSectionReader<'a>>
sourceimpl<'a> IntoIterator for CoreTypeSectionReader<'a>
impl<'a> IntoIterator for CoreTypeSectionReader<'a>
type Item = Result<CoreType<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<CoreTypeSectionReader<'a>>
sourceimpl<'a> IntoIterator for DataSectionReader<'a>
impl<'a> IntoIterator for DataSectionReader<'a>
type Item = Result<Data<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<DataSectionReader<'a>>
sourceimpl<'a> IntoIterator for ElementItemsReader<'a>
impl<'a> IntoIterator for ElementItemsReader<'a>
type Item = Result<ElementItem<'a>, BinaryReaderError>
type IntoIter = ElementItemsIterator<'a>
sourceimpl<'a> IntoIterator for ElementSectionReader<'a>
impl<'a> IntoIterator for ElementSectionReader<'a>
type Item = Result<Element<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ElementSectionReader<'a>>
sourceimpl<'a> IntoIterator for ExportSectionReader<'a>
impl<'a> IntoIterator for ExportSectionReader<'a>
type Item = Result<Export<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ExportSectionReader<'a>>
sourceimpl<'a> IntoIterator for FunctionSectionReader<'a>
impl<'a> IntoIterator for FunctionSectionReader<'a>
type Item = Result<u32, BinaryReaderError>
type IntoIter = SectionIteratorLimited<FunctionSectionReader<'a>>
sourceimpl<'a> IntoIterator for GlobalSectionReader<'a>
impl<'a> IntoIterator for GlobalSectionReader<'a>
type Item = Result<Global<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<GlobalSectionReader<'a>>
sourceimpl<'a> IntoIterator for ImportSectionReader<'a>
impl<'a> IntoIterator for ImportSectionReader<'a>
type Item = Result<Import<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ImportSectionReader<'a>>
sourceimpl<'a> IntoIterator for InstanceSectionReader<'a>
impl<'a> IntoIterator for InstanceSectionReader<'a>
type Item = Result<Instance<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<InstanceSectionReader<'a>>
sourceimpl<'a> IntoIterator for LinkingSectionReader<'a>
impl<'a> IntoIterator for LinkingSectionReader<'a>
type Item = Result<LinkingType, BinaryReaderError>
type IntoIter = SectionIteratorLimited<LinkingSectionReader<'a>>
sourceimpl<'a> IntoIterator for LocalsReader<'a>
impl<'a> IntoIterator for LocalsReader<'a>
type Item = Result<(u32, ValType), BinaryReaderError>
type IntoIter = LocalsIterator<'a>
sourceimpl<'a> IntoIterator for MemorySectionReader<'a>
impl<'a> IntoIterator for MemorySectionReader<'a>
type Item = Result<MemoryType, BinaryReaderError>
type IntoIter = SectionIteratorLimited<MemorySectionReader<'a>>
sourceimpl<'a> IntoIterator for NameSectionReader<'a>
impl<'a> IntoIterator for NameSectionReader<'a>
type Item = Result<Name<'a>, BinaryReaderError>
type IntoIter = SectionIterator<NameSectionReader<'a>>
sourceimpl<'a> IntoIterator for OperatorsReader<'a>
impl<'a> IntoIterator for OperatorsReader<'a>
type Item = Result<Operator<'a>, BinaryReaderError>
type IntoIter = OperatorsIterator<'a>
sourceimpl<'a> IntoIterator for ProducersFieldValuesReader<'a>
impl<'a> IntoIterator for ProducersFieldValuesReader<'a>
type Item = Result<ProducersFieldValue<'a>, BinaryReaderError>
type IntoIter = ProducersFieldValuesIterator<'a>
sourceimpl<'a> IntoIterator for ProducersSectionReader<'a>
impl<'a> IntoIterator for ProducersSectionReader<'a>
type Item = Result<ProducersField<'a>, BinaryReaderError>
type IntoIter = SectionIteratorLimited<ProducersSectionReader<'a>>
sourceimpl<'a> IntoIterator for RelocSectionReader<'a>
impl<'a> IntoIterator for RelocSectionReader<'a>
type Item = Result<Reloc, BinaryReaderError>
type IntoIter = SectionIteratorLimited<RelocSectionReader<'a>>
sourceimpl<'a> IntoIterator for TableSectionReader<'a>
impl<'a> IntoIterator for TableSectionReader<'a>
type Item = Result<TableType, BinaryReaderError>
type IntoIter = SectionIteratorLimited<TableSectionReader<'a>>
sourceimpl<'a> IntoIterator for TagSectionReader<'a>
impl<'a> IntoIterator for TagSectionReader<'a>
type Item = Result<TagType, BinaryReaderError>
type IntoIter = SectionIteratorLimited<TagSectionReader<'a>>
sourceimpl<'a> IntoIterator for TypeSectionReader<'a>
impl<'a> IntoIterator for TypeSectionReader<'a>
type Item = Result<Type, BinaryReaderError>
type IntoIter = SectionIteratorLimited<TypeSectionReader<'a>>
sourceimpl<'a, K, V> IntoIterator for &'a BoxedSlice<K, V> where
K: EntityRef,
impl<'a, K, V> IntoIterator for &'a BoxedSlice<K, V> where
K: EntityRef,
sourceimpl<'a, K, V> IntoIterator for &'a PrimaryMap<K, V> where
K: EntityRef,
impl<'a, K, V> IntoIterator for &'a PrimaryMap<K, V> where
K: EntityRef,
sourceimpl<'a, K, V> IntoIterator for &'a SparseMap<K, V> where
K: EntityRef,
V: SparseMapValue<K>,
impl<'a, K, V> IntoIterator for &'a SparseMap<K, V> where
K: EntityRef,
V: SparseMapValue<K>,
Iterating over the elements of a set.