pub struct Transparent<T> { /* private fields */ }
Expand description

A type that transparently implements PartialEq and Hash, to be used in structs that carry additional data that should not be relevant in comparisons.

It additionally supports creating dummy values and they will also compare equal to all other and hash identically.

Implementations§

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impl<T> Transparent<T>

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pub fn unwrap(self) -> T

Assert that the value was not forged and get its contents.

Panics

fails if self was obtainedy by Transparent::forge().

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pub fn forge() -> Self

Create a dummy value.

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impl<T> Transparent<T>

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pub fn from(inner: T) -> Self

Wrap in a transparent.

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impl Transparent<Span>

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pub fn join(self, other: Self) -> Option<Self>

Map join to the inner spans

Trait Implementations§

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impl<T: Clone> Clone for Transparent<T>

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fn clone(&self) -> Transparent<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Debug> Debug for Transparent<T>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<T: Display> Display for Transparent<T>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<T> Hash for Transparent<T>

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fn hash<H: Hasher>(&self, _: &mut H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<T> PartialEq for Transparent<T>

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fn eq(&self, _: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: TrySpan> TrySpan for Transparent<T>

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fn try_span(&self) -> Option<Span>

Sp always has a span, so TrySpan is guaranteed to succeed.

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impl<T: Copy> Copy for Transparent<T>

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impl<T> Eq for Transparent<T>

Auto Trait Implementations§

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impl<T> RefUnwindSafe for Transparent<T>where T: RefUnwindSafe,

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impl<T> Send for Transparent<T>where T: Send,

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impl<T> Sync for Transparent<T>where T: Sync,

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impl<T> Unpin for Transparent<T>where T: Unpin,

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impl<T> UnwindSafe for Transparent<T>where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.