Struct poem::http::header::OccupiedEntry [−][src]
pub struct OccupiedEntry<'a, T> { /* fields omitted */ }
Expand description
A view into a single occupied location in a HeaderMap
.
This struct is returned as part of the Entry
enum.
Implementations
Returns a reference to the entry’s key.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "world".parse().unwrap());
if let Entry::Occupied(e) = map.entry("host") {
assert_eq!("host", e.key());
}
Get a reference to the first value in the entry.
Values are stored in insertion order.
Panics
get
panics if there are no values associated with the entry.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "hello.world".parse().unwrap());
if let Entry::Occupied(mut e) = map.entry("host") {
assert_eq!(e.get(), &"hello.world");
e.append("hello.earth".parse().unwrap());
assert_eq!(e.get(), &"hello.world");
}
Get a mutable reference to the first value in the entry.
Values are stored in insertion order.
Panics
get_mut
panics if there are no values associated with the entry.
Examples
let mut map = HeaderMap::default();
map.insert(HOST, "hello.world".to_string());
if let Entry::Occupied(mut e) = map.entry("host") {
e.get_mut().push_str("-2");
assert_eq!(e.get(), &"hello.world-2");
}
Converts the OccupiedEntry
into a mutable reference to the first
value.
The lifetime of the returned reference is bound to the original map.
Panics
into_mut
panics if there are no values associated with the entry.
Examples
let mut map = HeaderMap::default();
map.insert(HOST, "hello.world".to_string());
map.append(HOST, "hello.earth".to_string());
if let Entry::Occupied(e) = map.entry("host") {
e.into_mut().push_str("-2");
}
assert_eq!("hello.world-2", map["host"]);
Sets the value of the entry.
All previous values associated with the entry are removed and the first
one is returned. See insert_mult
for an API that returns all values.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "hello.world".parse().unwrap());
if let Entry::Occupied(mut e) = map.entry("host") {
let mut prev = e.insert("earth".parse().unwrap());
assert_eq!("hello.world", prev);
}
assert_eq!("earth", map["host"]);
pub fn insert_mult(&mut self, value: T) -> ValueDrain<'_, T>ⓘNotable traits for ValueDrain<'a, T>impl<'a, T> Iterator for ValueDrain<'a, T> type Item = T;
pub fn insert_mult(&mut self, value: T) -> ValueDrain<'_, T>ⓘNotable traits for ValueDrain<'a, T>impl<'a, T> Iterator for ValueDrain<'a, T> type Item = T;
impl<'a, T> Iterator for ValueDrain<'a, T> type Item = T;
Sets the value of the entry.
This function does the same as insert
except it returns an iterator
that yields all values previously associated with the key.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "world".parse().unwrap());
map.append(HOST, "world2".parse().unwrap());
if let Entry::Occupied(mut e) = map.entry("host") {
let mut prev = e.insert_mult("earth".parse().unwrap());
assert_eq!("world", prev.next().unwrap());
assert_eq!("world2", prev.next().unwrap());
assert!(prev.next().is_none());
}
assert_eq!("earth", map["host"]);
Insert the value into the entry.
The new value is appended to the end of the entry’s value list. All previous values associated with the entry are retained.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "world".parse().unwrap());
if let Entry::Occupied(mut e) = map.entry("host") {
e.append("earth".parse().unwrap());
}
let values = map.get_all("host");
let mut i = values.iter();
assert_eq!("world", *i.next().unwrap());
assert_eq!("earth", *i.next().unwrap());
Remove the entry from the map.
All values associated with the entry are removed and the first one is
returned. See remove_entry_mult
for an API that returns all values.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "world".parse().unwrap());
if let Entry::Occupied(e) = map.entry("host") {
let mut prev = e.remove();
assert_eq!("world", prev);
}
assert!(!map.contains_key("host"));
Remove the entry from the map.
The key and all values associated with the entry are removed and the
first one is returned. See remove_entry_mult
for an API that returns
all values.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "world".parse().unwrap());
if let Entry::Occupied(e) = map.entry("host") {
let (key, mut prev) = e.remove_entry();
assert_eq!("host", key.as_str());
assert_eq!("world", prev);
}
assert!(!map.contains_key("host"));
Remove the entry from the map.
The key and all values associated with the entry are removed and returned.
Returns an iterator visiting all values associated with the entry.
Values are iterated in insertion order.
Examples
let mut map = HeaderMap::new();
map.insert(HOST, "world".parse().unwrap());
map.append(HOST, "earth".parse().unwrap());
if let Entry::Occupied(e) = map.entry("host") {
let mut iter = e.iter();
assert_eq!(&"world", iter.next().unwrap());
assert_eq!(&"earth", iter.next().unwrap());
assert!(iter.next().is_none());
}
pub fn iter_mut(&mut self) -> ValueIterMut<'_, T>ⓘNotable traits for ValueIterMut<'a, T>impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
pub fn iter_mut(&mut self) -> ValueIterMut<'_, T>ⓘNotable traits for ValueIterMut<'a, T>impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
Returns an iterator mutably visiting all values associated with the entry.
Values are iterated in insertion order.
Examples
let mut map = HeaderMap::default();
map.insert(HOST, "world".to_string());
map.append(HOST, "earth".to_string());
if let Entry::Occupied(mut e) = map.entry("host") {
for e in e.iter_mut() {
e.push_str("-boop");
}
}
let mut values = map.get_all("host");
let mut i = values.iter();
assert_eq!(&"world-boop", i.next().unwrap());
assert_eq!(&"earth-boop", i.next().unwrap());
Trait Implementations
type IntoIter = ValueIterMut<'a, T>
type IntoIter = ValueIterMut<'a, T>
Which kind of iterator are we turning this into?
pub fn into_iter(self) -> ValueIterMut<'a, T>ⓘNotable traits for ValueIterMut<'a, T>impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
pub fn into_iter(self) -> ValueIterMut<'a, T>ⓘNotable traits for ValueIterMut<'a, T>impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
Creates an iterator from a value. Read more
type IntoIter = ValueIterMut<'a, T>
type IntoIter = ValueIterMut<'a, T>
Which kind of iterator are we turning this into?
pub fn into_iter(self) -> ValueIterMut<'a, T>ⓘNotable traits for ValueIterMut<'a, T>impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
pub fn into_iter(self) -> ValueIterMut<'a, T>ⓘNotable traits for ValueIterMut<'a, T>impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
impl<'a, T> Iterator for ValueIterMut<'a, T> where
T: 'a, type Item = &'a mut T;
Creates an iterator from a value. Read more
Auto Trait Implementations
impl<'a, T> RefUnwindSafe for OccupiedEntry<'a, T> where
T: RefUnwindSafe,
impl<'a, T> Send for OccupiedEntry<'a, T> where
T: Send,
impl<'a, T> Sync for OccupiedEntry<'a, T> where
T: Sync,
impl<'a, T> Unpin for OccupiedEntry<'a, T>
impl<'a, T> !UnwindSafe for OccupiedEntry<'a, T>
Blanket Implementations
Mutably borrows from an owned value. Read more
fn fmt_binary(self) -> FmtBinary<Self> where
Self: Binary,
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Self: Binary,
Causes self
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Self: Display,
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Self: Display,
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Self: LowerExp,
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Self: LowerExp,
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fn fmt_lower_hex(self) -> FmtLowerHex<Self> where
Self: LowerHex,
fn fmt_lower_hex(self) -> FmtLowerHex<Self> where
Self: LowerHex,
Causes self
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Debug
-formatted. Read more
Causes self
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Self: Pointer,
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Self: UpperHex,
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Debug
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) -> R where
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&'a mut self,
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) -> R where
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func: impl FnOnce(&'a mut T) -> R
) -> R where
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func: impl FnOnce(&'a mut T) -> R
) -> R where
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) -> R where
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&'a mut self,
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) -> R where
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Pipes a mutable dereference into a function that cannot normally be called in suffix position. Read more
Pipes a reference into a function that cannot ordinarily be called in suffix position. Read more
fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self where
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self where
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self where
Self: AsMut<R>,
R: ?Sized,
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Calls .tap()
only in debug builds, and is erased in release builds.
fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self
fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self
Calls .tap_mut()
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self where
Self: Borrow<B>,
B: ?Sized,
fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self where
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B: ?Sized,
Calls .tap_borrow()
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self where
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B: ?Sized,
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B: ?Sized,
Calls .tap_borrow_mut()
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self where
Self: AsRef<R>,
R: ?Sized,
fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self where
Self: AsRef<R>,
R: ?Sized,
Calls .tap_ref()
only in debug builds, and is erased in release
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self where
Self: AsMut<R>,
R: ?Sized,
fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self where
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R: ?Sized,
Calls .tap_ref_mut()
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Provides immutable access for inspection. Read more
Calls tap
in debug builds, and does nothing in release builds.
Provides mutable access for modification. Read more
fn tap_mut_dbg<F, R>(self, func: F) -> Self where
F: FnOnce(&mut Self) -> R,
fn tap_mut_dbg<F, R>(self, func: F) -> Self where
F: FnOnce(&mut Self) -> R,
Calls tap_mut
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impl<T, U> TapAsRef<U> for T where
U: ?Sized,
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U: ?Sized,
Provides immutable access to the reference for inspection.
fn tap_ref_dbg<F, R>(self, func: F) -> Self where
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F: FnOnce(&T) -> R,
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F: FnOnce(&T) -> R,
Calls tap_ref
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fn tap_ref_mut<F, R>(self, func: F) -> Self where
Self: AsMut<T>,
F: FnOnce(&mut T) -> R,
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F: FnOnce(&mut T) -> R,
Provides mutable access to the reference for modification.
fn tap_ref_mut_dbg<F, R>(self, func: F) -> Self where
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F: FnOnce(&mut T) -> R,
fn tap_ref_mut_dbg<F, R>(self, func: F) -> Self where
Self: AsMut<T>,
F: FnOnce(&mut T) -> R,
Calls tap_ref_mut
in debug builds, and does nothing in release builds.
impl<T, U> TapBorrow<U> for T where
U: ?Sized,
impl<T, U> TapBorrow<U> for T where
U: ?Sized,
fn tap_borrow<F, R>(self, func: F) -> Self where
Self: Borrow<T>,
F: FnOnce(&T) -> R,
fn tap_borrow<F, R>(self, func: F) -> Self where
Self: Borrow<T>,
F: FnOnce(&T) -> R,
Provides immutable access to the borrow for inspection. Read more
fn tap_borrow_dbg<F, R>(self, func: F) -> Self where
Self: Borrow<T>,
F: FnOnce(&T) -> R,
fn tap_borrow_dbg<F, R>(self, func: F) -> Self where
Self: Borrow<T>,
F: FnOnce(&T) -> R,
Calls tap_borrow
in debug builds, and does nothing in release builds.
fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
Provides mutable access to the borrow for modification.
fn tap_borrow_mut_dbg<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
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F: FnOnce(&mut T) -> R,
Calls tap_borrow_mut
in debug builds, and does nothing in release
builds. Read more
Immutably dereferences self
for inspection.
fn tap_deref_dbg<F, R>(self, func: F) -> Self where
Self: Deref,
F: FnOnce(&Self::Target) -> R,
fn tap_deref_dbg<F, R>(self, func: F) -> Self where
Self: Deref,
F: FnOnce(&Self::Target) -> R,
Calls tap_deref
in debug builds, and does nothing in release builds.
fn tap_deref_mut<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
fn tap_deref_mut<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
Mutably dereferences self
for modification.
fn tap_deref_mut_dbg<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
fn tap_deref_mut_dbg<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
Calls tap_deref_mut
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pub fn vzip(self) -> V
Attaches the provided Subscriber
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