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Docs.rs

Script

StructScript 

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pub struct Script {/* private fields */ }
Expand description

ECMAScript’sScript Record.

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implScript

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pub fnrealm(&self) -> &Realm

Gets the realm of this script.

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pub fnhost_defined(&self) -> &HostDefined

Returns theECMAScript specification defined\[\[HostDefined\]\] field of theModule.

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pub fnparse<R:ReadChar>( src:Source<'_, R>, realm:Option<Realm>, context: &mutContext,) ->JsResult<Self>

Abstract operationParseScript ( sourceText, realm, hostDefined ).

Parses the providedsrc as an ECMAScript script, returning an error if parsing fails.

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pub fncodeblock(&self, context: &mutContext) ->JsResult<Gc<CodeBlock>>

Compiles the codeblock of this script.

This is a no-op if this has been called previously.

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pub fnevaluate(&self, context: &mutContext) ->JsResult<JsValue>

Evaluates this script and returns its result.

Note that this won’t run any scheduled promise jobs; you need to callContext::run_jobson the context orJobExecutor::run_jobs on the provided queue to run them.

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pub async fnevaluate_async(&self, context: &mutContext) ->JsResult<JsValue>

Evaluates this script and returns its result, periodically yielding to the executorin order to avoid blocking the current thread.

This uses an implementation defined amount of “clock cycles” that need to pass beforeexecution is suspended. SeeScript::evaluate_async_with_budget if you want to alsocustomize this parameter.

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pub async fnevaluate_async_with_budget( &self, context: &mutContext, budget:u32,) ->JsResult<JsValue>

Evaluates this script and returns its result, yielding to the executor each timebudgetnumber of “clock cycles” pass.

Note that “clock cycle” is in quotation marks because we can’t determine exactly how manyCPU clock cycles a VM instruction will take, but all instructions have a “cost” associatedwith them that depends on their individual complexity. We’d recommend benchmarking withdifferent budget sizes in order to find the ideal yielding time for your application.

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implClone forScript

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fnclone(&self) ->Script

Returns a duplicate of the value.Read more
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fnclone_from(&mut self, source: &Self)

Performs copy-assignment fromsource.Read more
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implDebug forScript

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fnfmt(&self, f: &mutFormatter<'_>) ->Result

Formats the value using the given formatter.Read more
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implDrop forScript

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fndrop(&mut self)

Executes the destructor for this type.Read more
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implFinalize forScript

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fnfinalize(&self)

Cleanup logic for a type.
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implTrace forScript

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unsafe fntrace(&self, tracer: &mut Tracer)

Marks all containedGcs.Read more
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unsafe fntrace_non_roots(&self)

Trace handles located in GC heap, and mark them as non root.Read more
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fnrun_finalizer(&self)

RunsFinalize::finalize on this object and allcontained subobjects.

Auto Trait Implementations§

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implFreeze forScript

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impl !RefUnwindSafe forScript

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impl !Send forScript

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impl !Sync forScript

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implUnpin forScript

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impl !UnwindSafe forScript

Blanket Implementations§

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

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fntype_id(&self) ->TypeId

Gets theTypeId ofself.Read more
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impl<T>Borrow<T> for T
where T: ?Sized,

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fnborrow(&self) ->&T

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

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fnborrow_mut(&mut self) ->&mut T

Mutably borrows from an owned value.Read more
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impl<T>CloneToUninit for T
where T:Clone,

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unsafe fnclone_to_uninit(&self, dest:*mutu8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment fromself todest.Read more
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impl<T>Conv for T

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fnconv<T>(self) -> T
where Self:Into<T>,

Convertsself intoT usingInto<T>.Read more
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impl<T>From<T> for T

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fnfrom(t: T) -> T

Returns the argument unchanged.

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

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fninto(self) -> U

CallsU::from(self).

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

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impl<T>IntoEither for T

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fninto_either(self, into_left:bool) ->Either<Self, Self>

Convertsself into aLeft variant ofEither<Self, Self>ifinto_left istrue.Convertsself into aRight variant ofEither<Self, Self>otherwise.Read more
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fninto_either_with<F>(self, into_left: F) ->Either<Self, Self>
where F:FnOnce(&Self) ->bool,

Convertsself into aLeft variant ofEither<Self, Self>ifinto_left(&self) returnstrue.Convertsself into aRight variant ofEither<Self, Self>otherwise.Read more
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impl<T>Pipe for T
where T: ?Sized,

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fnpipe<R>(self, func: implFnOnce(Self) -> R) -> R
where Self:Sized,

Pipes by value. This is generally the method you want to use.Read more
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fnpipe_ref<'a, R>(&'a self, func: implFnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrowsself and passes that borrow into the pipe function.Read more
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fnpipe_ref_mut<'a, R>(&'a mut self, func: implFnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrowsself and passes that borrow into the pipe function.Read more
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fnpipe_borrow<'a, B, R>(&'a self, func: implFnOnce(&'a B) -> R) -> R
where Self:Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrowsself, then passesself.borrow() into the pipe function.Read more
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fnpipe_borrow_mut<'a, B, R>( &'a mut self, func: implFnOnce(&'a mut B) -> R,) -> R
where Self:BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrowsself, then passesself.borrow_mut() into the pipefunction.Read more
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fnpipe_as_ref<'a, U, R>(&'a self, func: implFnOnce(&'a U) -> R) -> R
where Self:AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrowsself, then passesself.as_ref() into the pipe function.
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fnpipe_as_mut<'a, U, R>(&'a mut self, func: implFnOnce(&'a mut U) -> R) -> R
where Self:AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrowsself, then passesself.as_mut() into the pipefunction.
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fnpipe_deref<'a, T, R>(&'a self, func: implFnOnce(&'a T) -> R) -> R
where Self:Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrowsself, then passesself.deref() into the pipe function.
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fnpipe_deref_mut<'a, T, R>( &'a mut self, func: implFnOnce(&'a mut T) -> R,) -> R
where Self:DerefMut<Target = T> +Deref, T: 'a + ?Sized, R: 'a,

Mutably borrowsself, then passesself.deref_mut() into the pipefunction.
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impl<T>Tap for T

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fntap(self, func: implFnOnce(&Self)) -> Self

Immutable access to a value.Read more
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fntap_mut(self, func: implFnOnce(&mut Self)) -> Self

Mutable access to a value.Read more
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fntap_borrow<B>(self, func: implFnOnce(&B)) -> Self
where Self:Borrow<B>, B: ?Sized,

Immutable access to theBorrow<B> of a value.Read more
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fntap_borrow_mut<B>(self, func: implFnOnce(&mut B)) -> Self
where Self:BorrowMut<B>, B: ?Sized,

Mutable access to theBorrowMut<B> of a value.Read more
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fntap_ref<R>(self, func: implFnOnce(&R)) -> Self
where Self:AsRef<R>, R: ?Sized,

Immutable access to theAsRef<R> view of a value.Read more
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fntap_ref_mut<R>(self, func: implFnOnce(&mut R)) -> Self
where Self:AsMut<R>, R: ?Sized,

Mutable access to theAsMut<R> view of a value.Read more
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fntap_deref<T>(self, func: implFnOnce(&T)) -> Self
where Self:Deref<Target = T>, T: ?Sized,

Immutable access to theDeref::Target of a value.Read more
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fntap_deref_mut<T>(self, func: implFnOnce(&mut T)) -> Self
where Self:DerefMut<Target = T> +Deref, T: ?Sized,

Mutable access to theDeref::Target of a value.Read more
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fntap_dbg(self, func: implFnOnce(&Self)) -> Self

Calls.tap() only in debug builds, and is erased in release builds.
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fntap_mut_dbg(self, func: implFnOnce(&mut Self)) -> Self

Calls.tap_mut() only in debug builds, and is erased in releasebuilds.
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fntap_borrow_dbg<B>(self, func: implFnOnce(&B)) -> Self
where Self:Borrow<B>, B: ?Sized,

Calls.tap_borrow() only in debug builds, and is erased in releasebuilds.
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fntap_borrow_mut_dbg<B>(self, func: implFnOnce(&mut B)) -> Self
where Self:BorrowMut<B>, B: ?Sized,

Calls.tap_borrow_mut() only in debug builds, and is erased in releasebuilds.
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fntap_ref_dbg<R>(self, func: implFnOnce(&R)) -> Self
where Self:AsRef<R>, R: ?Sized,

Calls.tap_ref() only in debug builds, and is erased in releasebuilds.
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fntap_ref_mut_dbg<R>(self, func: implFnOnce(&mut R)) -> Self
where Self:AsMut<R>, R: ?Sized,

Calls.tap_ref_mut() only in debug builds, and is erased in releasebuilds.
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fntap_deref_dbg<T>(self, func: implFnOnce(&T)) -> Self
where Self:Deref<Target = T>, T: ?Sized,

Calls.tap_deref() only in debug builds, and is erased in releasebuilds.
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fntap_deref_mut_dbg<T>(self, func: implFnOnce(&mut T)) -> Self
where Self:DerefMut<Target = T> +Deref, T: ?Sized,

Calls.tap_deref_mut() only in debug builds, and is erased in releasebuilds.
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impl<T>ToOwned for T
where T:Clone,

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typeOwned = T

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

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

Uses borrowed data to replace owned data, usually by cloning.Read more
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impl<T>TryConv for T

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fntry_conv<T>(self) ->Result<T, Self::Error>
where Self:TryInto<T>,

Attempts to convertself intoT usingTryInto<T>.Read more
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impl<T, U>TryFrom<U> for T
where U:Into<T>,

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typeError =Infallible

The type returned in the event of a conversion error.
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fntry_from(value: U) ->Result<T, <T asTryFrom<U>>::Error>

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

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typeError = <U asTryFrom<T>>::Error

The type returned in the event of a conversion error.
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fntry_into(self) ->Result<U, <U asTryFrom<T>>::Error>

Performs the conversion.
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impl<V, T>VZip<V> for T
where V:MultiLane<T>,

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fnvzip(self) -> V

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impl<T>ErasedDestructor for T
where T: 'static,


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