com.google.javascript.rhino.jstype
Class NumberType

java.lang.Object
  com.google.javascript.rhino.jstype.JSType
      com.google.javascript.rhino.jstype.NumberType

All Implemented Interfaces:

Serializable

public class NumberType
extends JSType

Number type.

See Also:

Serialized Form

isNullable

public boolean isNullable()

Description copied from class: JSType

Tests whether this type is nullable.

Overrides:

isNullable in class JSType

testForEquality

public TernaryValue testForEquality(JSType that)

Description copied from class: JSType

Compares this and that.

Overrides:

testForEquality in class JSType

Returns:

• TernaryValue.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 values

isNumberValueType

public boolean isNumberValueType()

Overrides:

isNumberValueType in class JSType

matchesNumberContext

public boolean matchesNumberContext()

Description copied from class: JSType

This predicate is used to test whether a given type can appear in a numeric context, such as an operand of a multiply operator.

Overrides:

matchesNumberContext in class JSType

matchesStringContext

public boolean matchesStringContext()

Description copied from class: JSType

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. 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.

Overrides:

matchesStringContext in class JSType

matchesObjectContext

public boolean matchesObjectContext()

Description copied from class: JSType

This predicate is used to test whether a given type can appear in an Object 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.

Overrides:

matchesObjectContext in class JSType

getDisplayName

public String getDisplayName()

Description copied from class: JSType

Returns a user meaningful label for the JSType instance. For example, Functions and Enums will return their declaration name (if they have one). Some types will not have a meaningful display name. Calls to hasDisplayName() will return true IFF getDisplayName() will return null or a zero length string.

Overrides:

getDisplayName in class JSType

Returns:

the display name of the type, or null if one is not available

getPossibleToBooleanOutcomes

public BooleanLiteralSet getPossibleToBooleanOutcomes()

Description copied from class: JSType

Computes the set of possible outcomes of the ToBoolean predicate for this type. The ToBoolean predicate is defined by the ECMA-262 standard, 3^rd 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}

Specified by:

getPossibleToBooleanOutcomes in class JSType

Returns:

the set of boolean literals for this type

visit

public <T> T visit(Visitor<T> visitor)

Description copied from class: JSType

Visit this type with the given visitor.

Specified by:

visit in class JSType

Returns:

the value returned by the visitor

See Also:

Visitor

autoboxesTo

public JSType autoboxesTo()

Description copied from class: JSType

Gets the type to which this type auto-boxes.

Overrides:

autoboxesTo in class JSType

Returns:

the auto-boxed type or null if this type does not auto-box

hasDisplayName

public boolean hasDisplayName()

Overrides:

hasDisplayName in class JSType

Returns:

true if the JSType has a user meaningful label.

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