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=== tests/cases/conformance/es6/defaultParameters/emitDefaultParametersFunctionExpression.ts ===
var lambda1 = (y = "hello") => { }
>lambda1 : (y?: string) => void
>(y = "hello") => { } : (y?: string) => void
>y : string
>"hello" : "hello"
var lambda2 = (x: number, y = "hello") => { }
>lambda2 : (x: number, y?: string) => void
>(x: number, y = "hello") => { } : (x: number, y?: string) => void
>x : number
>y : string
>"hello" : "hello"
var lambda3 = (x: number, y = "hello", ...rest) => { }
>lambda3 : (x: number, y?: string, ...rest: any[]) => void
>(x: number, y = "hello", ...rest) => { } : (x: number, y?: string, ...rest: any[]) => void
>x : number
>y : string
>"hello" : "hello"
>rest : any[]
var lambda4 = (y = "hello", ...rest) => { }
>lambda4 : (y?: string, ...rest: any[]) => void
>(y = "hello", ...rest) => { } : (y?: string, ...rest: any[]) => void
>y : string
>"hello" : "hello"
>rest : any[]
var x = function (str = "hello", ...rest) { }
>x : (str?: string, ...rest: any[]) => void
>function (str = "hello", ...rest) { } : (str?: string, ...rest: any[]) => void
>str : string
>"hello" : "hello"
>rest : any[]
var y = (function (num = 10, boo = false, ...rest) { })()
>y : void
>(function (num = 10, boo = false, ...rest) { })() : void
>(function (num = 10, boo = false, ...rest) { }) : (num?: number, boo?: boolean) => void
>function (num = 10, boo = false, ...rest) { } : (num?: number, boo?: boolean) => void
>num : number
>10 : 10
>boo : boolean
>false : false
>rest : []
var z = (function (num: number, boo = false, ...rest) { })(10)
>z : void
>(function (num: number, boo = false, ...rest) { })(10) : void
>(function (num: number, boo = false, ...rest) { }) : (num: number, boo?: boolean) => void
>function (num: number, boo = false, ...rest) { } : (num: number, boo?: boolean) => void
>num : number
>boo : boolean
>false : false
>rest : []
>10 : 10
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