XPathFunctionItem class abstract

Base class for all function items (functions, maps, arrays) in XDM 3.1.

Implemented types

• XPathItem

Implementers

• XPathArray
• XPathFunction
• XPathMap

Constructors

XPathFunctionItem()

Creates a function item.

const

XPathFunctionItem.fn0(XmlName name, XPathFunction0 function, {XPathType? returnType})

Creates a function item with 0 arguments.

const

factory

XPathFunctionItem.fn1(XmlName name, XPathFunction1 function, {List<XPathType>? parameterTypes, XPathType? returnType})

Creates a function item with 1 argument.

const

factory

XPathFunctionItem.fn2(XmlName name, XPathFunction2 function, {List<XPathType>? parameterTypes, XPathType? returnType})

Creates a function item with 2 arguments.

const

factory

XPathFunctionItem.fn3(XmlName name, XPathFunction3 function, {List<XPathType>? parameterTypes, XPathType? returnType})

Creates a function item with 3 arguments.

const

factory

XPathFunctionItem.fnN(XmlName name, int arity, XPathFunctionN function, {List<XPathType>? parameterTypes, XPathType? returnType})

Creates a function item with arity arguments taking a list.

const

factory

XPathFunctionItem.function({required XmlName name, required int arity, required XPathFunctionN function, List<XPathType>? parameterTypes, XPathType? returnType})

Creates a general function item taking a list of arguments.

const

factory

XPathFunctionItem.overloaded(XmlName name, Map<int, XPathFunctionItem> byArity)

Creates an overloaded function item that dispatches across arities.

const

factory

XPathFunctionItem.variadic(XmlName name, int minArity, XPathFunctionN function, {List<XPathType>? parameterTypes, XPathType? returnType})

Creates a variadic function item with minimum arity minArity.

const

factory

Properties

arity → int

The arity (number of required arguments) of the function item.

no setter

effectiveBooleanValue → bool

The effective boolean value (EBV) of this item.

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

isVariadic → bool

Whether this function accepts variable arguments (at least arity).

no setter

name → XmlName

The name of the function, if named.

no setter

parameterTypes → List<XPathType>?

The parameter types of the function, if statically known.

no setter

returnType → XPathType?

The return type of the function, if statically known.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

stringValue → String

Canonical string representation of this item.

no setter, override

type → XPathType

The XDM type of this item.

no setter, override

Methods

atomize() → XPathAtomic

Atomizes this item into an XPathAtomic value.

override

call(XPathContext context, List<XPathSequence> arguments) → XPathSequence

Invokes the function item with the given arguments.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

toValue() → Object

Converts this item to a native Dart value.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited