com.google.javascript.jscomp.parsing.parser

Class FeatureSet

java.lang.Object

com.google.javascript.jscomp.parsing.parser.FeatureSet

All Implemented Interfaces:

Serializable

public final class FeatureSet
extends Object
implements Serializable

Represents various aspects of language version and support.

This is somewhat redundant with LanguageMode, but is separate for two reasons: (1) it's used for parsing, which cannot depend on LanguageMode, and (2) it's concerned with slightly different nuances: implemented features and modules rather than strictness.

In the long term, it would be good to disentangle all these concerns and pull out a single LanguageSyntax enum with a separate strict mode flag, and then these could possibly be unified.

Instances of this class are immutable.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FeatureSet.Feature Specific features that can be included in a FeatureSet.

Field Summary

Fields

Modifier and Type	Field and Description
static FeatureSet	BARE_MINIMUM The bare minimum set of features.
static FeatureSet	ES3 Features from ES3.
static FeatureSet	ES5 Features from ES5 only.
static FeatureSet	ES6 The full set of ES6 features, not including modules.
static FeatureSet	ES6_MODULES All ES6 features, including modules.
static FeatureSet	ES7
static FeatureSet	ES7_MODULES
static FeatureSet	ES8
static FeatureSet	ES8_MODULES
static FeatureSet	TYPESCRIPT

Method Summary

Modifier and Type	Method and Description
boolean	contains(FeatureSet other) Does this FeatureSet contain all of the features of other?
boolean	equals(Object other)
boolean	has(FeatureSet.Feature feature) Does this FeatureSet include feature?
int	hashCode()
static FeatureSet	latest()
String	toString()
FeatureSet	union(FeatureSet other) Returns a new FeatureSet including all features of both this and other.
static FeatureSet	valueOf(String name) Parses known strings into feature sets.
String	version() Returns a string representation suitable for encoding in depgraph and deps.js files.
FeatureSet	with(FeatureSet.Feature... newFeatures) Returns a feature set combining all the features from this and newFeatures.
FeatureSet	with(Set<FeatureSet.Feature> newFeatures) Returns a feature set combining all the features from this and newFeatures.
FeatureSet	without(FeatureSet.Feature feature)
FeatureSet	withoutTypes()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

BARE_MINIMUM

public static final FeatureSet BARE_MINIMUM

The bare minimum set of features.

ES3

public static final FeatureSet ES3

Features from ES3.

ES5

public static final FeatureSet ES5

Features from ES5 only.

ES6_MODULES

public static final FeatureSet ES6_MODULES

All ES6 features, including modules.

ES6

public static final FeatureSet ES6

The full set of ES6 features, not including modules.

ES7_MODULES

public static final FeatureSet ES7_MODULES

ES7

public static final FeatureSet ES7

ES8_MODULES

public static final FeatureSet ES8_MODULES

ES8

public static final FeatureSet ES8

TYPESCRIPT

public static final FeatureSet TYPESCRIPT

Method Detail

version

public String version()

Returns a string representation suitable for encoding in depgraph and deps.js files.

without

public FeatureSet without(FeatureSet.Feature feature)

withoutTypes

public FeatureSet withoutTypes()

union

public FeatureSet union(FeatureSet other)

Returns a new FeatureSet including all features of both this and other.

contains

public boolean contains(FeatureSet other)

Does this FeatureSet contain all of the features of other?

with

public FeatureSet with(FeatureSet.Feature... newFeatures)

Returns a feature set combining all the features from this and newFeatures.

with

public FeatureSet with(Set<FeatureSet.Feature> newFeatures)

Returns a feature set combining all the features from this and newFeatures.

has

public boolean has(FeatureSet.Feature feature)

Does this FeatureSet include feature?

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

valueOf

public static FeatureSet valueOf(String name)

Parses known strings into feature sets.

latest

public static FeatureSet latest()