swc_ecma_preset_env

Enum Feature

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pub enum Feature {
Show 50 variants TemplateLiterals, Literals, FunctionName, ArrowFunctions, BlockScopedFunctions, Classes, ObjectSuper, ShorthandProperties, DuplicateKeys, ComputedProperties, ForOf, StickyRegex, DotAllRegex, UnicodeRegex, Spread, Parameters, Destructuring, BlockScoping, TypeOfSymbol, NewTarget, Regenerator, ExponentiationOperator, AsyncToGenerator, AsyncGeneratorFunctions, ObjectRestSpread, UnicodePropertyRegex, JsonStrings, OptionalCatchBinding, NamedCapturingGroupsRegex, MemberExpressionLiterals, PropertyLiterals, ReservedWords, ExportNamespaceFrom, NullishCoalescing, LogicalAssignmentOperators, OptionalChaining, ClassProperties, NumericSeparator, PrivateMethods, ClassStaticBlock, PrivatePropertyInObject, UnicodeEscapes, BugfixAsyncArrowsInClass, BugfixEdgeDefaultParam, BugfixTaggedTemplateCaching, BugfixSafariIdDestructuringCollisionInFunctionExpression, BugfixTransformEdgeFunctionName, BugfixTransformSafariBlockShadowing, BugfixTransformSafariForShadowing, BugfixTransformV8SpreadParametersInOptionalChaining,
}

Variants§

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TemplateLiterals

transform-template-literals

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Literals

transform-literals

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FunctionName

transform-function-name

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ArrowFunctions

transform-arrow-functions

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BlockScopedFunctions

transform-block-scoped-functions

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Classes

transform-classes

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ObjectSuper

transform-object-super

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ShorthandProperties

transform-shorthand-properties

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DuplicateKeys

transform-duplicate-keys

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ComputedProperties

transform-computed-properties

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ForOf

transform-for-of

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StickyRegex

transform-sticky-regex

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DotAllRegex

transform-dotall-regex

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UnicodeRegex

transform-unicode-regex

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Spread

transform-spread

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Parameters

transform-parameters

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Destructuring

transform-destructuring

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BlockScoping

transform-block-scoping

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TypeOfSymbol

transform-typeof-symbol

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NewTarget

transform-new-target

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Regenerator

transform-regenerator

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ExponentiationOperator

transform-exponentiation-operator

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AsyncToGenerator

transform-async-to-generator

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AsyncGeneratorFunctions

transform-async-generator-functions

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ObjectRestSpread

transform-object-rest-spread

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UnicodePropertyRegex

transform-unicode-property-regex

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JsonStrings

transform-json-strings

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OptionalCatchBinding

transform-optional-catch-binding

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NamedCapturingGroupsRegex

transform-named-capturing-groups-regex

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MemberExpressionLiterals

transform-member-expression-literals

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PropertyLiterals

transform-property-literals

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ReservedWords

transform-reserved-words

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ExportNamespaceFrom

transform-export-namespace-from

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NullishCoalescing

transform-nullish-coalescing-operator

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LogicalAssignmentOperators

transform-logical-assignment-operators

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OptionalChaining

transform-optional-chaining

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ClassProperties

transform-class-properties

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NumericSeparator

transform-numeric-separator

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PrivateMethods

transform-private-methods

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ClassStaticBlock

transform-class-static-block

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PrivatePropertyInObject

transform-private-property-in-object

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UnicodeEscapes

transform-unicode-escapes

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BugfixAsyncArrowsInClass

bugfix/transform-async-arrows-in-class

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BugfixEdgeDefaultParam

bugfix/transform-edge-default-parameters

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BugfixTaggedTemplateCaching

bugfix/transform-tagged-template-caching

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BugfixSafariIdDestructuringCollisionInFunctionExpression

bugfix/transform-safari-id-destructuring-collision-in-function-expression

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BugfixTransformEdgeFunctionName

bugfix/transform-edge-function-name

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BugfixTransformSafariBlockShadowing

bugfix/transform-safari-block-shadowing

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BugfixTransformSafariForShadowing

bugfix/transform-safari-for-shadowing

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BugfixTransformV8SpreadParametersInOptionalChaining

bugfix/transform-v8-spread-parameters-in-optional-chaining

Implementations§

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impl Feature

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pub fn should_enable( self, target: Versions, bugfixes: bool, default: bool, ) -> bool

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impl Feature

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pub fn as_str(&self) -> &'static str

Trait Implementations§

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impl Clone for Feature

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fn clone(&self) -> Feature

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 Debug for Feature

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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<'de> Deserialize<'de> for Feature

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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Display for Feature

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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 From<Feature> for FeatureOrModule

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fn from(v: Feature) -> Self

Converts to this type from the input type.
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impl FromStr for Feature

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type Err = ()

The associated error which can be returned from parsing.
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fn from_str(s: &str) -> Result<Self, ()>

Parses a string s to return a value of this type. Read more
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impl Hash for Feature

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fn hash<__H: Hasher>(&self, state: &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 PartialEq for Feature

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fn eq(&self, other: &Feature) -> bool

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for Feature

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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Copy for Feature

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impl Eq for Feature

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impl StructuralPartialEq for Feature

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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> CallHasher for T
where T: Hash + ?Sized,

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fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64
where H: Hash + ?Sized, B: BuildHasher,

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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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 T
where 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> IntoEither for T

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

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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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> ToOwned for T
where 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 T
where 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 T
where 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 T
where 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<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
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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

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impl<T> MaybeSendSync for T