public final class StringType extends ValueType
JSType.EqCache, JSType.ImplCache, JSType.MatchStatus, JSType.TypePair| Modifier and Type | Field and Description |
|---|---|
private static long |
serialVersionUID |
ALPHA, registry, templateTypeMap| Constructor and Description |
|---|
StringType(JSTypeRegistry registry) |
| Modifier and Type | Method and Description |
|---|---|
JSType |
autoboxesTo()
Turn a scalar type to the corresponding object type.
|
java.lang.String |
getDisplayName()
Returns a user meaningful label for the JSType instance.
|
BooleanLiteralSet |
getPossibleToBooleanOutcomes()
Computes the set of possible outcomes of the
ToBoolean predicate
for this type. |
boolean |
isStringValueType() |
boolean |
matchesNumberContext()
This predicate is used to test whether a given type can appear in a
numeric context, such as an operand of a multiply operator.
|
boolean |
matchesObjectContext()
This predicate is used to test whether a given type can appear in an
Object context, such as the expression in a with statement. |
boolean |
matchesStringContext()
This predicate is used to test whether a given type can appear in a
String context, such as an operand of a string concat (+) operator. |
TernaryValue |
testForEquality(JSType that)
Compares
this and that. |
(package private) java.lang.String |
toStringHelper(boolean forAnnotations) |
<T> T |
visit(Visitor<T> visitor)
Visit this type with the given visitor.
|
hasDisplayName, resolveInternal, visitautobox, canBeCalled, canCastTo, canTestForEqualityWith, canTestForShallowEqualityWith, checkEquivalenceHelper, checkEquivalenceHelper, collapseUnion, dereference, differsFrom, equals, extendTemplateTypeMap, filterNoResolvedType, findPropertyType, getGreatestSubtype, getGreatestSubtype, getJSDocInfo, getLeastSupertype, getLeastSupertype, getNativeType, getRestrictedTypeGivenToBooleanOutcome, getTemplateTypeMap, getTypesUnderEquality, getTypesUnderInequality, getTypesUnderShallowEquality, getTypesUnderShallowInequality, hasAnyTemplateTypes, hasAnyTemplateTypesInternal, hashCode, hasProperty, isAllType, isArrayType, isBooleanObjectType, isBooleanValueType, isBottom, isCheckedUnknownType, isConstructor, isDateType, isDict, isEmptyType, isEnumElementType, isEnumType, isEquivalent, isEquivalentTo, isEquivalentTo, isExemptFromTemplateTypeInvariance, isExplicitlyVoidable, isFunctionPrototypeType, isFunctionType, isGlobalThisType, isInstanceType, isInterface, isNamedType, isNominalConstructor, isNominalType, isNoObjectType, isNoResolvedType, isNoType, isNullable, isNullType, isNumber, isNumberObjectType, isNumberValueType, isObject, isOrdinaryFunction, isRecordType, isRegexpType, isResolved, isString, isStringObjectType, isStruct, isStructuralInterface, isStructuralType, isSubtype, isSubtype, isSubtypeHelper, isSubtypeOf, isSubtypeWithoutStructuralTyping, isTemplateType, isTemplatizedType, isTheObjectType, isUnionType, isUnknownType, isVoidable, isVoidType, matchConstraint, matchesInt32Context, matchesUint32Context, resolve, restrictByNotNullOrUndefined, safeResolve, setResolvedTypeInternal, setValidator, testForEqualityHelper, toAnnotationString, toDebugHashCodeString, toMaybeEnumElementType, toMaybeEnumType, toMaybeFunctionType, toMaybeFunctionType, toMaybeNamedType, toMaybeObjectType, toMaybeRecordType, toMaybeTemplateType, toMaybeTemplatizedType, toMaybeUnionType, toNonNullAnnotationString, toObjectType, toString, unboxesToprivate static final long serialVersionUID
StringType(JSTypeRegistry registry)
public TernaryValue testForEquality(JSType that)
JSTypethis and that.testForEquality in class JSTypeTernaryValue.TRUE if the comparison of values of
this type and that always succeed (such as
undefined compared to null)TernaryValue.FALSE if the comparison of values of
this type and that always fails (such as
undefined compared to number)TernaryValue.UNKNOWN if the comparison can succeed or
fail depending on the concrete valuespublic boolean isStringValueType()
isStringValueType in class JSTypepublic boolean matchesNumberContext()
JSTypematchesNumberContext in class JSTypepublic boolean matchesStringContext()
JSTypeString context, such as an operand of a string concat (+) operator.
All types have at least the potential for converting to String.
When we add externally defined types, such as a browser OM, we may choose
to add types that do not automatically convert to String.matchesStringContext in class JSTypepublic boolean matchesObjectContext()
JSTypeObject context, such as the expression in a with statement.
Most types we will encounter, except notably null, have at least
the potential for converting to Object. Host defined objects can
get peculiar.matchesObjectContext in class JSTypejava.lang.String toStringHelper(boolean forAnnotations)
toStringHelper in class JSTypeforAnnotations - Whether this is for use in code generator
annotations. Otherwise, it's for warnings.public java.lang.String getDisplayName()
JSTypegetDisplayName in class JSTypepublic JSType autoboxesTo()
JSTypeautoboxesTo in class JSTypenull if this type is not a scalar.public BooleanLiteralSet getPossibleToBooleanOutcomes()
JSTypeToBoolean predicate
for this type. The ToBoolean predicate is defined by the ECMA-262
standard, 3rd edition. Its behavior for simple types can be
summarized by the following table:
| type | result |
|---|---|
undefined | {false} |
null | {false} |
boolean | {true, false} |
number | {true, false} |
string | {true, false} |
Object | {true} |
getPossibleToBooleanOutcomes in class JSType