=== tests/cases/compiler/restParameters.ts ===
function f18(a?:string, ...b:number[]){}
>f18 : (a?: string, ...b: number[]) => void, Symbol(f18, Decl(restParameters.ts, 0, 0))
>a : string, Symbol(a, Decl(restParameters.ts, 0, 13))
>b : number[], Symbol(b, Decl(restParameters.ts, 0, 23))
 
function f19(a?:string, b?:number, ...c:number[]){}
>f19 : (a?: string, b?: number, ...c: number[]) => void, Symbol(f19, Decl(restParameters.ts, 0, 40))
>a : string, Symbol(a, Decl(restParameters.ts, 2, 13))
>b : number, Symbol(b, Decl(restParameters.ts, 2, 23))
>c : number[], Symbol(c, Decl(restParameters.ts, 2, 34))
 
function f20(a:string, b?:string, ...c:number[]){}
>f20 : (a: string, b?: string, ...c: number[]) => void, Symbol(f20, Decl(restParameters.ts, 2, 51))
>a : string, Symbol(a, Decl(restParameters.ts, 4, 13))
>b : string, Symbol(b, Decl(restParameters.ts, 4, 22))
>c : number[], Symbol(c, Decl(restParameters.ts, 4, 33))
 
function f21(a:string, b?:string, c?:number, ...d:number[]){}
>f21 : (a: string, b?: string, c?: number, ...d: number[]) => void, Symbol(f21, Decl(restParameters.ts, 4, 50))
>a : string, Symbol(a, Decl(restParameters.ts, 6, 13))
>b : string, Symbol(b, Decl(restParameters.ts, 6, 22))
>c : number, Symbol(c, Decl(restParameters.ts, 6, 33))
>d : number[], Symbol(d, Decl(restParameters.ts, 6, 44))