# Struct cargo::core::compiler::BuildScriptOutputs

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    pub struct BuildScriptOutputs {
        outputs: HashMap<Metadata, BuildOutput>,
    }

Expand description

Map of packages to build script output.

This initially starts out as empty. Overridden build scripts get inserted during `build_map`. The rest of the entries are added immediately after each build script runs.

The `Metadata` is the unique metadata hash for the RunCustomBuild Unit of the package. It needs a unique key, since the build script can be run multiple times with different profiles or features. We can’t embed a `Unit` because this structure needs to be shareable between threads.

## Fields§

§`outputs: HashMap<Metadata, BuildOutput>`

## Implementations§

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### impl BuildScriptOutputs

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#### fn insert( &mut self, pkg_id: PackageId, metadata: Metadata, parsed_output: BuildOutput )

Inserts a new entry into the map.

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#### fn contains_key(&self, metadata: Metadata) -> bool

Returns `true` if the given key already exists.

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#### pub fn get(&self, meta: Metadata) -> Option<&BuildOutput>

Gets the build output for the given key.

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#### pub fn iter(&self) -> impl Iterator<Item = (&Metadata, &BuildOutput)>

Returns an iterator over all entries.

## Trait Implementations§

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### impl Default for BuildScriptOutputs

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#### fn default() -> BuildScriptOutputs

Returns the “default value” for a type. Read more

## Auto Trait Implementations§

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### impl RefUnwindSafe for BuildScriptOutputs

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### impl Send for BuildScriptOutputs

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### impl Sync for BuildScriptOutputs

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### impl Unpin for BuildScriptOutputs

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### impl UnwindSafe for BuildScriptOutputs

## 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> Same<T> 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

## 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:48 bytes