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=== tests/cases/conformance/es6/destructuring/optionalBindingParameters1.ts ===
function foo([x,y,z]?: [string, number, boolean]) {
>foo : ([x, y, z]?: [string, number, boolean]) => void
>x : string
>y : number
>z : boolean
}
foo(["", 0, false]);
>foo(["", 0, false]) : void
>foo : ([x, y, z]?: [string, number, boolean]) => void
>["", 0, false] : [string, number, false]
>"" : ""
>0 : 0
>false : false
foo([false, 0, ""]);
>foo([false, 0, ""]) : void
>foo : ([x, y, z]?: [string, number, boolean]) => void
>[false, 0, ""] : [boolean, number, string]
>false : false
>0 : 0
>"" : ""
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