Function definition

Syntax

FunctionDefinition :
function FunctionName TypeParameters_opt FunctionCommon^allowIn

Function name

Syntax

FunctionName :
IdentifierName
get [no line break] IdentifierName
set [no line break] IdentifierName

FunctionName is used inside FunctionDefinition.

function f(): void {}
function get x(): Number (impl.x)
function set x(v: Number): void { impl.x = v }

TypeParameters may not appear in a function definition defining a getter, setter or constructor.

Function body

Syntax

function f():Number 10

function f():void {
    // code
}

FunctionCommon^β :
FunctionSignature
FunctionSignature [lookahead ∉ { { }] [inline, or in a greater indentation, or lookahead = **(**] AssignmentExpression^β
FunctionSignature Block

Function signature

Syntax

FunctionSignature :
( Parameters ) ResultType

ResultType :
«empty»
: TypeExpression

Parameter list

Syntax

Parameters :
«empty»
NonemptyParameters

NonemptyParameters :
Parameter
Parameter , NonemptyParameters
RestParameter

Parameter :
TypedPattern
TypedPattern = AssignmentExpression^allowIn

RestParameter :
... TypedPattern