# Struct cargo::util::rustc::Cache

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    struct Cache {
        cache_location: Option<PathBuf>,
        dirty: bool,
        data: CacheData,
    }

Expand description

It is a well known fact that `rustc` is not the fastest compiler in the world. What is less known is that even `rustc --version --verbose` takes about a hundred milliseconds! Because we need compiler version info even for no-op builds, we cache it here, based on compiler’s mtime and rustup’s current toolchain.

https://github.com/rust-lang/cargo/issues/5315 https://github.com/rust-lang/rust/issues/49761

## Fields§

§`cache_location: Option<PathBuf>`§`dirty: bool`§`data: CacheData`

## Implementations§

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### impl Cache

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#### fn load( wrapper: Option<&Path>, workspace_wrapper: Option<&Path>, rustc: &Path, rustup_rustc: &Path, cache_location: Option<PathBuf>, config: &Config ) -> Cache

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#### fn cached_output( &mut self, cmd: &ProcessBuilder, extra_fingerprint: u64 ) -> CargoResult<(String, String)>

## Trait Implementations§

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### impl Debug for Cache

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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 Drop for Cache

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#### fn drop(&mut self)

Executes the destructor for this type. Read more

## Auto Trait Implementations§

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### impl RefUnwindSafe for Cache

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### impl Send for Cache

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### impl Sync for Cache

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### impl Unpin for Cache

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### impl UnwindSafe for Cache

## 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> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [`Span`], returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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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> Same for T

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#### type Output = T

Should always be `Self`
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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.
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### impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 136 bytes