[−][src]Struct abi_stable::std_types::arc::RArc
Ffi-safe version of ::std::sync::Arc<_>
Example
Using an RArc<RMutex<RVec<u32>>>
to get a list populated from multiple threads.
use abi_stable::{ external_types::RMutex, std_types::{RArc,RVec}, }; use std::thread; let arc=RArc::new(RMutex::new(RVec::new())); { let arc2=RArc::clone(&arc); assert!( std::ptr::eq(&*arc,&*arc2) ); } let mut guards=Vec::new(); for i in 0..10_u64 { let arc=RArc::clone(&arc); guards.push(thread::spawn(move||{ for j in 0..100_u64{ arc.lock().push(i*100+j); } })); } for guard in guards{ guard.join().unwrap(); } let mut vec=RArc::try_unwrap(arc) .ok() .expect("All the threads were joined,so this must be the only RArc") .into_inner(); vec.sort(); assert_eq!( vec, (0..1000).collect::<RVec<_>>() );
Methods
impl<T> RArc<T>
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pub fn new(this: T) -> Self
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pub fn into_arc(this: Self) -> Arc<T> where
T: Clone,
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T: Clone,
Converts this into an Arc<T>
Allocators
The reason RArc<T>
cannot always be converted to an Arc<T>
is
because their allocators might be different.
When is T cloned
T
is cloned if the current dynamic_library/executable is
not the one that created the RArc<T>
,
and the strong count is greater than 1.
Example
use abi_stable::std_types::RArc; use std::sync::Arc; let arc=RArc::new(100); assert_eq!( RArc::into_arc(arc), Arc::new(100) );
pub fn try_unwrap(this: Self) -> Result<T, Self>
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Attempts to unwrap this RArc<T>
into a T
,
returns Err(self) if the RArc<T>
s strong count is greater than 1.
Example
use abi_stable::std_types::RArc; let arc0=RArc::new(100); assert_eq!( RArc::try_unwrap(arc0), Ok(100) ); let arc1=RArc::new(100); let arc1_clone=RArc::clone(&arc1); assert_eq!( RArc::try_unwrap(arc1), Err(arc1_clone.clone()) );
pub fn get_mut(this: &mut Self) -> Option<&mut T>
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Attempts to create a mutable reference to T
,
failing if RArc<T>
s strong count is greater than 1.
Example
use abi_stable::std_types::RArc; let mut arc0=RArc::new(100); *RArc::get_mut(&mut arc0).unwrap()+=400; assert_eq!( *arc0, 500 ); let mut arc1=RArc::new(100); let _arc1_clone=RArc::clone(&arc1); assert_eq!( RArc::get_mut(&mut arc1), None );
pub fn make_mut<'a>(this: &'a mut Self) -> &'a mut T where
T: Clone,
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T: Clone,
Makes a mutable reference to T
,
if there are other RArc<T>
s pointing to the same value,
then T
is cloned to ensure unique ownership of the value.
Postconditions
After this call, the strong count of this
will be 1,
because either it was 1 before the call,
or because a new RArc<T>
was created to ensure unique ownership of T
.
Example
use abi_stable::std_types::RArc; let mut arc0=RArc::new(100); *RArc::make_mut(&mut arc0)+=400; assert_eq!( *arc0, 500 ); let mut arc1=RArc::new(100); let arc1_clone=RArc::clone(&arc1); *RArc::make_mut(&mut arc1)+=400; assert_eq!( *arc1, 500 ); assert_eq!( *arc1_clone, 100 );
pub fn strong_count(this: &Self) -> usize
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Gets the number of RArc that point to the value.
Example
use abi_stable::std_types::RArc; let arc=RArc::new(0); assert_eq!( RArc::strong_count(&arc), 1 ); let clone=RArc::clone(&arc); assert_eq!( RArc::strong_count(&arc), 2 );
pub fn weak_count(this: &Self) -> usize
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Gets the number of std::sync::Weak that point to the value.
Example
use abi_stable::std_types::RArc; use std::sync::Arc; let rustarc=Arc::new(0); let arc=RArc::from(rustarc.clone()); assert_eq!( RArc::weak_count(&arc), 0 ); let weak_0=Arc::downgrade(&rustarc); assert_eq!( RArc::weak_count(&arc), 1 ); let weak_1=Arc::downgrade(&rustarc); assert_eq!( RArc::weak_count(&arc), 2 );
Trait Implementations
impl<T> IntoReprRust for RArc<T> where
T: Clone + StableAbi,
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T: Clone + StableAbi,
impl<T> GetStaticEquivalent_ for RArc<T> where
T: __StableAbi,
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T: __StableAbi,
type StaticEquivalent = _static_RArc<__GetStaticEquivalent<T>>
impl<T> SharedStableAbi for RArc<T> where
T: __StableAbi,
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T: __StableAbi,
type IsNonZeroType = False
Whether this type has a single invalid bit-pattern. Read more
type Kind = __ValueKind
The kind of abi stability of this type,there are 2: Read more
const S_LAYOUT: &'static TypeLayout
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const S_ABI_CONSTS: AbiConsts
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impl<T> GetPointerKind for RArc<T>
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type Kind = PK_SmartPointer
const KIND: PointerKind
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impl<T, O> CanTransmuteElement<O> for RArc<T>
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type TransmutedPtr = RArc<O>
The type of the pointer after it's element type has been changed.
impl<T> Send for RArc<T> where
T: Send + Sync,
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T: Send + Sync,
impl<T> Sync for RArc<T> where
T: Send + Sync,
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T: Send + Sync,
impl<T> Drop for RArc<T>
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impl<T> AsRef<T> for RArc<T>
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impl<T> Into<Arc<T>> for RArc<T> where
T: Clone + StableAbi,
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T: Clone + StableAbi,
impl<T> From<Arc<T>> for RArc<T>
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impl<T> Clone for RArc<T>
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fn clone(&self) -> Self
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fn clone_from(&mut self, source: &Self)
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impl<T> Default for RArc<T> where
T: Default,
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T: Default,
impl<T> Eq for RArc<T> where
T: Eq,
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T: Eq,
impl<T> Ord for RArc<T> where
T: Ord,
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T: Ord,
fn cmp(&self, other: &Self) -> Ordering
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fn max(self, other: Self) -> Self
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fn min(self, other: Self) -> Self
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fn clamp(self, min: Self, max: Self) -> Self
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impl<T> PartialEq<RArc<T>> for RArc<T> where
T: PartialEq,
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T: PartialEq,
impl<T> PartialOrd<RArc<T>> for RArc<T> where
T: PartialOrd,
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T: PartialOrd,
fn partial_cmp(&self, other: &Self) -> Option<Ordering>
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#[must_use]
fn lt(&self, other: &Rhs) -> bool
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#[must_use]
fn le(&self, other: &Rhs) -> bool
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#[must_use]
fn gt(&self, other: &Rhs) -> bool
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#[must_use]
fn ge(&self, other: &Rhs) -> bool
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impl<T> Display for RArc<T> where
T: Display,
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T: Display,
impl<T> Debug for RArc<T> where
T: Debug,
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T: Debug,
impl<T> Deref for RArc<T>
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impl<T> Hash for RArc<T> where
T: Hash,
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T: Hash,
fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl<T> Borrow<T> for RArc<T>
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impl<'de, T> Deserialize<'de> for RArc<T> where
T: Deserialize<'de>,
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T: Deserialize<'de>,
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where
D: Deserializer<'de>,
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D: Deserializer<'de>,
impl<T> Serialize for RArc<T> where
T: Serialize,
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T: Serialize,
Auto Trait Implementations
impl<T> Unpin for RArc<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for RArc<T> where
T: RefUnwindSafe + UnwindSafe,
T: RefUnwindSafe + UnwindSafe,
impl<T> RefUnwindSafe for RArc<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
Blanket Implementations
impl<This> GetConstGenericVTable for This where
This: StableAbi + Eq + PartialEq<This> + Debug + Send + Sync,
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This: StableAbi + Eq + PartialEq<This> + Debug + Send + Sync,
const VTABLE: ConstGenericVTableFor<This>
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impl<This> StableAbi for This where
This: SharedStableAbi<Kind = ValueKind>,
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This: SharedStableAbi<Kind = ValueKind>,
const LAYOUT: &'static TypeLayout
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const ABI_CONSTS: AbiConsts
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impl<This> TransmuteElement for This where
This: ?Sized,
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This: ?Sized,
unsafe fn transmute_element<T>(self) -> Self::TransmutedPtr where
Self: CanTransmuteElement<T>,
Self::Target: Sized,
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Self: CanTransmuteElement<T>,
Self::Target: Sized,
impl<'a, T> BorrowOwned<'a> for T where
T: 'a + Clone,
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T: 'a + Clone,
type ROwned = T
type RBorrowed = &'a T
fn r_borrow(
&'a <T as BorrowOwned<'a>>::ROwned
) -> <T as BorrowOwned<'a>>::RBorrowed
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&'a <T as BorrowOwned<'a>>::ROwned
) -> <T as BorrowOwned<'a>>::RBorrowed
fn r_to_owned(
<T as BorrowOwned<'a>>::RBorrowed
) -> <T as BorrowOwned<'a>>::ROwned
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<T as BorrowOwned<'a>>::RBorrowed
) -> <T as BorrowOwned<'a>>::ROwned
fn deref_borrowed(&<T as BorrowOwned<'a>>::RBorrowed) -> &T
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fn deref_owned(&<T as BorrowOwned<'a>>::ROwned) -> &T
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fn from_cow_borrow(&'a T) -> <T as BorrowOwned<'a>>::RBorrowed
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fn from_cow_owned(<T as ToOwned>::Owned) -> <T as BorrowOwned<'a>>::ROwned
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fn into_cow_borrow(<T as BorrowOwned<'a>>::RBorrowed) -> &'a T
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fn into_cow_owned(<T as BorrowOwned<'a>>::ROwned) -> <T as ToOwned>::Owned
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> TypeIdentity for T where
T: ?Sized,
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T: ?Sized,
type Type = T
The same type as Self. Read more
fn into_type_val(self) -> Self::Type where
Self::Type: Sized,
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Self::Type: Sized,
fn into_type_ref(&self) -> &Self::Type
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fn into_type_mut(&mut self) -> &mut Self::Type
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fn into_type_box(self: Box<Self>) -> Box<Self::Type>
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fn into_type_arc(this: Arc<Self>) -> Arc<Self::Type>
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fn into_type_rc(this: Rc<Self>) -> Rc<Self::Type>
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fn from_type_val(this: Self::Type) -> Self where
Self::Type: Sized,
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Self::Type: Sized,
fn from_type_ref(this: &Self::Type) -> &Self
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fn from_type_mut(this: &mut Self::Type) -> &mut Self
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fn from_type_box(this: Box<Self::Type>) -> Box<Self>
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fn from_type_arc(this: Arc<Self::Type>) -> Arc<Self>
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fn from_type_rc(this: Rc<Self::Type>) -> Rc<Self>
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impl<T> SelfOps for T where
T: ?Sized,
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T: ?Sized,
const T: PhantomData<fn() -> Self>
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const T_D: PhantomData<Self>
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fn assert_ty(self, _other: PhantomData<fn() -> Self>) -> Self
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fn assert_ty_ref(&self, _other: PhantomData<fn() -> Self>) -> &Self
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fn assert_ty_mut(&mut self, _other: PhantomData<fn() -> Self>) -> &mut Self
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fn ty_(&self) -> PhantomData<fn() -> Self>
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fn ty_d(&self) -> PhantomData<Self>
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fn ty_inv(&self) -> PhantomData<fn(Self) -> Self>
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fn ty_inv_ref(&self) -> PhantomData<Cell<&Self>>
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fn eq_id(&self, other: &Self) -> bool
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fn piped<F, U>(self, f: F) -> U where
F: FnOnce(Self) -> U,
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F: FnOnce(Self) -> U,
fn piped_ref<'a, F, U>(&'a self, f: F) -> U where
F: FnOnce(&'a Self) -> U,
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F: FnOnce(&'a Self) -> U,
fn piped_mut<'a, F, U>(&'a mut self, f: F) -> U where
F: FnOnce(&'a mut Self) -> U,
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F: FnOnce(&'a mut Self) -> U,
fn mutated<F>(self, f: F) -> Self where
F: FnOnce(&mut Self),
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F: FnOnce(&mut Self),
fn observe<F>(self, f: F) -> Self where
F: FnOnce(&Self),
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F: FnOnce(&Self),
fn into_<T>(self, PhantomData<fn() -> T>) -> T where
Self: Into<T>,
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Self: Into<T>,
fn as_ref_<T>(&self) -> &T where
Self: AsRef<T>,
T: ?Sized,
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Self: AsRef<T>,
T: ?Sized,
fn as_mut_<T>(&mut self) -> &mut T where
Self: AsMut<T>,
T: ?Sized,
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Self: AsMut<T>,
T: ?Sized,
fn drop_(self)
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impl<T> StringExt for T where
T: Borrow<str> + ?Sized,
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T: Borrow<str> + ?Sized,
fn previous_char_boundary(&self, index: usize) -> usize
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fn next_char_boundary(&self, index: usize) -> usize
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fn left_char_boundary(&self, index: usize) -> usize
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fn right_char_boundary(&self, index: usize) -> usize
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fn get_offset_inside_of(&self, parent: &str) -> Option<usize>
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fn offset_inside_of(&self, parent: &str) -> usize
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fn is_substring_of(&self, parent: &str) -> bool
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fn split_while<P, T>(&'a self, mapper: P) -> SplitWhile<'a, P, T> where
P: FnMut(char) -> T,
T: Eq + Clone,
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P: FnMut(char) -> T,
T: Eq + Clone,
fn rsplit_while<P, T>(&'a self, mapper: P) -> RSplitWhile<'a, P, T> where
P: FnMut(char) -> T,
T: Eq + Clone,
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P: FnMut(char) -> T,
T: Eq + Clone,
fn get_nth_char_index(&self, n: usize) -> Option<usize>
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fn nth_char_index(&self, n: usize) -> usize
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fn nth_char(&self, n: usize) -> Option<char>
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fn first_chars(&self, n: usize) -> &str
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fn last_chars(&self, n: usize) -> &str
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fn from_nth_char(&self, n: usize) -> &str
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fn calc_len_utf16(&self) -> usize
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fn get_char_at(&self, at_byte: usize) -> Option<char>
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fn char_indices_to(&self, to: usize) -> CharIndices
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fn char_indices_from(&self, from: usize) -> CharIndicesFrom
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fn left_pad(&self, how_much: usize) -> String
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fn left_padder(&'a self, how_much: usize) -> LeftPadder<'a>
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fn line_indentation(&self) -> usize
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fn min_indentation(&self) -> usize
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fn max_indentation(&self) -> usize
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The error type returned when the conversion fails.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> DeserializeOwned for T where
T: Deserialize<'de>,
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T: Deserialize<'de>,