Class PredicateType

Represents a type predicate.

function isString(x: unknown): x is string {}
function assert(condition: boolean): asserts condition {}

Hierarchy (View Summary)

Constructors

constructor

Methods

estimatePrintWidth fromObject getTypeString needsParenthesis stringify toObject toString visit

Properties

asserts name type targetType?

Constructors

constructor

  • new PredicateType(
        name: string,
        asserts: boolean,
        targetType?: Models.SomeType,
    ): Models.PredicateType

    Create a new PredicateType instance.

    Parameters

    • name: string

      The identifier name which is tested by the predicate.

    • asserts: boolean

      True if the type is of the form asserts val is string, false if the type is of the form val is string

    • OptionaltargetType: Models.SomeType

      The type that the identifier is tested to be. May be undefined if the type is of the form asserts val. Will be defined if the type is of the form asserts val is string or val is string.

    Returns Models.PredicateType

Methods

estimatePrintWidth

fromObject

ProtectedgetTypeString

needsParenthesis

stringify

toObject

toString

visit

Properties

asserts

asserts: boolean

True if the type is of the form asserts val is string, false if the type is of the form val is string

name

name: string

The identifier name which is tested by the predicate.

Readonlytype

type: "predicate"

The type name identifier.

OptionaltargetType

targetType?: Models.SomeType

The type that the identifier is tested to be. May be undefined if the type is of the form asserts val. Will be defined if the type is of the form asserts val is string or val is string.

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