=== tests/cases/conformance/types/typeRelationships/bestCommonType/bestCommonTypeOfTuple.ts ===
function f1(x: number): string { return "foo"; }
>f1 : Symbol(f1, Decl(bestCommonTypeOfTuple.ts, 0, 0))
>x : Symbol(x, Decl(bestCommonTypeOfTuple.ts, 0, 12))

function f2(x: number): number { return 10; }
>f2 : Symbol(f2, Decl(bestCommonTypeOfTuple.ts, 0, 48))
>x : Symbol(x, Decl(bestCommonTypeOfTuple.ts, 2, 12))

function f3(x: number): boolean { return true; }
>f3 : Symbol(f3, Decl(bestCommonTypeOfTuple.ts, 2, 45))
>x : Symbol(x, Decl(bestCommonTypeOfTuple.ts, 4, 12))

enum E1 { one }
>E1 : Symbol(E1, Decl(bestCommonTypeOfTuple.ts, 4, 48))
>one : Symbol(E1.one, Decl(bestCommonTypeOfTuple.ts, 6, 9))

enum E2 { two }
>E2 : Symbol(E2, Decl(bestCommonTypeOfTuple.ts, 6, 15))
>two : Symbol(E2.two, Decl(bestCommonTypeOfTuple.ts, 8, 9))


var t1: [(x: number) => string, (x: number) => number];
>t1 : Symbol(t1, Decl(bestCommonTypeOfTuple.ts, 11, 3))
>x : Symbol(x, Decl(bestCommonTypeOfTuple.ts, 11, 10))
>x : Symbol(x, Decl(bestCommonTypeOfTuple.ts, 11, 33))

var t2: [E1, E2];
>t2 : Symbol(t2, Decl(bestCommonTypeOfTuple.ts, 12, 3))
>E1 : Symbol(E1, Decl(bestCommonTypeOfTuple.ts, 4, 48))
>E2 : Symbol(E2, Decl(bestCommonTypeOfTuple.ts, 6, 15))

var t3: [number, any];
>t3 : Symbol(t3, Decl(bestCommonTypeOfTuple.ts, 13, 3))

var t4: [E1, E2, number];
>t4 : Symbol(t4, Decl(bestCommonTypeOfTuple.ts, 14, 3))
>E1 : Symbol(E1, Decl(bestCommonTypeOfTuple.ts, 4, 48))
>E2 : Symbol(E2, Decl(bestCommonTypeOfTuple.ts, 6, 15))

// no error
t1 = [f1, f2];
>t1 : Symbol(t1, Decl(bestCommonTypeOfTuple.ts, 11, 3))
>f1 : Symbol(f1, Decl(bestCommonTypeOfTuple.ts, 0, 0))
>f2 : Symbol(f2, Decl(bestCommonTypeOfTuple.ts, 0, 48))

t2 = [E1.one, E2.two];
>t2 : Symbol(t2, Decl(bestCommonTypeOfTuple.ts, 12, 3))
>E1.one : Symbol(E1.one, Decl(bestCommonTypeOfTuple.ts, 6, 9))
>E1 : Symbol(E1, Decl(bestCommonTypeOfTuple.ts, 4, 48))
>one : Symbol(E1.one, Decl(bestCommonTypeOfTuple.ts, 6, 9))
>E2.two : Symbol(E2.two, Decl(bestCommonTypeOfTuple.ts, 8, 9))
>E2 : Symbol(E2, Decl(bestCommonTypeOfTuple.ts, 6, 15))
>two : Symbol(E2.two, Decl(bestCommonTypeOfTuple.ts, 8, 9))

t3 = [5, undefined];
>t3 : Symbol(t3, Decl(bestCommonTypeOfTuple.ts, 13, 3))
>undefined : Symbol(undefined)

t4 = [E1.one, E2.two, 20];
>t4 : Symbol(t4, Decl(bestCommonTypeOfTuple.ts, 14, 3))
>E1.one : Symbol(E1.one, Decl(bestCommonTypeOfTuple.ts, 6, 9))
>E1 : Symbol(E1, Decl(bestCommonTypeOfTuple.ts, 4, 48))
>one : Symbol(E1.one, Decl(bestCommonTypeOfTuple.ts, 6, 9))
>E2.two : Symbol(E2.two, Decl(bestCommonTypeOfTuple.ts, 8, 9))
>E2 : Symbol(E2, Decl(bestCommonTypeOfTuple.ts, 6, 15))
>two : Symbol(E2.two, Decl(bestCommonTypeOfTuple.ts, 8, 9))

var e1 = t1[2];  // {}
>e1 : Symbol(e1, Decl(bestCommonTypeOfTuple.ts, 21, 3))
>t1 : Symbol(t1, Decl(bestCommonTypeOfTuple.ts, 11, 3))

var e2 = t2[2];  // {}
>e2 : Symbol(e2, Decl(bestCommonTypeOfTuple.ts, 22, 3))
>t2 : Symbol(t2, Decl(bestCommonTypeOfTuple.ts, 12, 3))

var e3 = t3[2];  // any
>e3 : Symbol(e3, Decl(bestCommonTypeOfTuple.ts, 23, 3))
>t3 : Symbol(t3, Decl(bestCommonTypeOfTuple.ts, 13, 3))

var e4 = t4[3];  // number
>e4 : Symbol(e4, Decl(bestCommonTypeOfTuple.ts, 24, 3))
>t4 : Symbol(t4, Decl(bestCommonTypeOfTuple.ts, 14, 3))