Tuple conformance

tests/baselines/reference/assignmentCompatBetweenTupleAndArray.errors.txt

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+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatBetweenTupleAndArray.ts(17,1): error TS2322: Type '[number, string]' is not assignable to type 'number[]':
+  Types of property 'pop' are incompatible:
+    Type '() => {}' is not assignable to type '() => number':
+      Type '{}' is not assignable to type 'number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatBetweenTupleAndArray.ts(18,1): error TS2322: Type '{}[]' is not assignable to type '[{}]':
+  Property '0' is missing in type '{}[]'.
+
+
+==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatBetweenTupleAndArray.ts (2 errors) ====
+    var numStrTuple: [number, string];
+    var numNumTuple: [number, number];
+    var numEmptyObjTuple: [number, {}];
+    var emptyObjTuple: [{}];
+
+    var numArray: number[];
+    var emptyObjArray: {}[];
+
+    // no error
+    numArray = numNumTuple;
+    emptyObjArray = emptyObjTuple;
+    emptyObjArray = numStrTuple;
+    emptyObjArray = numNumTuple;
+    emptyObjArray = numEmptyObjTuple;
+
+    // error
+    numArray = numStrTuple;
+    ~~~~~~~~
+!!! error TS2322: Type '[number, string]' is not assignable to type 'number[]':
+!!! error TS2322:   Types of property 'pop' are incompatible:
+!!! error TS2322:     Type '() => {}' is not assignable to type '() => number':
+!!! error TS2322:       Type '{}' is not assignable to type 'number'.
+    emptyObjTuple = emptyObjArray;
+    ~~~~~~~~~~~~~
+!!! error TS2322: Type '{}[]' is not assignable to type '[{}]':
+!!! error TS2322:   Property '0' is missing in type '{}[]'.
+

tests/baselines/reference/assignmentCompatBetweenTupleAndArray.js

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+//// [assignmentCompatBetweenTupleAndArray.ts]
+var numStrTuple: [number, string];
+var numNumTuple: [number, number];
+var numEmptyObjTuple: [number, {}];
+var emptyObjTuple: [{}];
+
+var numArray: number[];
+var emptyObjArray: {}[];
+
+// no error
+numArray = numNumTuple;
+emptyObjArray = emptyObjTuple;
+emptyObjArray = numStrTuple;
+emptyObjArray = numNumTuple;
+emptyObjArray = numEmptyObjTuple;
+
+// error
+numArray = numStrTuple;
+emptyObjTuple = emptyObjArray;
+
+
+//// [assignmentCompatBetweenTupleAndArray.js]
+var numStrTuple;
+var numNumTuple;
+var numEmptyObjTuple;
+var emptyObjTuple;
+var numArray;
+var emptyObjArray;
+// no error
+numArray = numNumTuple;
+emptyObjArray = emptyObjTuple;
+emptyObjArray = numStrTuple;
+emptyObjArray = numNumTuple;
+emptyObjArray = numEmptyObjTuple;
+// error
+numArray = numStrTuple;
+emptyObjTuple = emptyObjArray;

tests/baselines/reference/bestCommonTypeOfTuple.js

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+//// [bestCommonTypeOfTuple.ts]
+function f1(x: number): string { return "foo"; }
+
+function f2(x: number): number { return 10; }
+
+function f3(x: number): boolean { return true; }
+
+enum E1 { one }
+
+enum E2 { two }
+
+
+var t1: [(x: number) => string, (x: number) => number];
+var t2: [E1, E2];
+var t3: [number, any];
+var t4: [E1, E2, number];
+
+// no error
+t1 = [f1, f2];
+t2 = [E1.one, E2.two];
+t3 = [5, undefined];
+t4 = [E1.one, E2.two, 20];
+var e1 = t1[2];  // {}
+var e2 = t2[2];  // {}
+var e3 = t3[2];  // any
+var e4 = t4[3];  // number
+
+//// [bestCommonTypeOfTuple.js]
+function f1(x) {
+    return "foo";
+}
+function f2(x) {
+    return 10;
+}
+function f3(x) {
+    return true;
+}
+var E1;
+(function (E1) {
+    E1[E1["one"] = 0] = "one";
+})(E1 || (E1 = {}));
+var E2;
+(function (E2) {
+    E2[E2["two"] = 0] = "two";
+})(E2 || (E2 = {}));
+var t1;
+var t2;
+var t3;
+var t4;
+// no error
+t1 = [f1, f2];
+t2 = [0 /* one */, 0 /* two */];
+t3 = [5, undefined];
+t4 = [0 /* one */, 0 /* two */, 20];
+var e1 = t1[2]; // {}
+var e2 = t2[2]; // {}
+var e3 = t3[2]; // any
+var e4 = t4[3]; // number

tests/baselines/reference/bestCommonTypeOfTuple.types

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+=== tests/cases/conformance/types/typeRelationships/bestCommonType/bestCommonTypeOfTuple.ts ===
+function f1(x: number): string { return "foo"; }
+>f1 : (x: number) => string
+>x : number
+
+function f2(x: number): number { return 10; }
+>f2 : (x: number) => number
+>x : number
+
+function f3(x: number): boolean { return true; }
+>f3 : (x: number) => boolean
+>x : number
+
+enum E1 { one }
+>E1 : E1
+>one : E1
+
+enum E2 { two }
+>E2 : E2
+>two : E2
+
+
+var t1: [(x: number) => string, (x: number) => number];
+>t1 : [(x: number) => string, (x: number) => number]
+>x : number
+>x : number
+
+var t2: [E1, E2];
+>t2 : [E1, E2]
+>E1 : E1
+>E2 : E2
+
+var t3: [number, any];
+>t3 : [number, any]
+
+var t4: [E1, E2, number];
+>t4 : [E1, E2, number]
+>E1 : E1
+>E2 : E2
+
+// no error
+t1 = [f1, f2];
+>t1 = [f1, f2] : [(x: number) => string, (x: number) => number]
+>t1 : [(x: number) => string, (x: number) => number]
+>[f1, f2] : [(x: number) => string, (x: number) => number]
+>f1 : (x: number) => string
+>f2 : (x: number) => number
+
+t2 = [E1.one, E2.two];
+>t2 = [E1.one, E2.two] : [E1, E2]
+>t2 : [E1, E2]
+>[E1.one, E2.two] : [E1, E2]
+>E1.one : E1
+>E1 : typeof E1
+>one : E1
+>E2.two : E2
+>E2 : typeof E2
+>two : E2
+
+t3 = [5, undefined];
+>t3 = [5, undefined] : [number, undefined]
+>t3 : [number, any]
+>[5, undefined] : [number, undefined]
+>undefined : undefined
+
+t4 = [E1.one, E2.two, 20];
+>t4 = [E1.one, E2.two, 20] : [E1, E2, number]
+>t4 : [E1, E2, number]
+>[E1.one, E2.two, 20] : [E1, E2, number]
+>E1.one : E1
+>E1 : typeof E1
+>one : E1
+>E2.two : E2
+>E2 : typeof E2
+>two : E2
+
+var e1 = t1[2];  // {}
+>e1 : {}
+>t1[2] : {}
+>t1 : [(x: number) => string, (x: number) => number]
+
+var e2 = t2[2];  // {}
+>e2 : {}
+>t2[2] : {}
+>t2 : [E1, E2]
+
+var e3 = t3[2];  // any
+>e3 : any
+>t3[2] : any
+>t3 : [number, any]
+
+var e4 = t4[3];  // number
+>e4 : number
+>t4[3] : number
+>t4 : [E1, E2, number]
+

tests/baselines/reference/bestCommonTypeOfTuple2.js

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+//// [bestCommonTypeOfTuple2.ts]
+interface base { }
+interface base1 { i }
+class C implements base { c }
+class D implements base { d }
+class E implements base { e }
+class F extends C { f }
+
+class C1 implements base1 { i = "foo"; c }
+class D1 extends C1 { i = "bar"; d }
+
+var t1: [C, base];
+var t2: [C, D];
+var t3: [C1, D1];
+var t4: [base1, C1];
+var t5: [C1, F]
+
+var e11 = t1[4]; // base
+var e21 = t2[4]; // {}
+var e31 = t3[4]; // C1
+var e41 = t4[2]; // base1
+var e51 = t5[2]; // {}
+
+
+//// [bestCommonTypeOfTuple2.js]
+var __extends = this.__extends || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    __.prototype = b.prototype;
+    d.prototype = new __();
+};
+var C = (function () {
+    function C() {
+    }
+    return C;
+})();
+var D = (function () {
+    function D() {
+    }
+    return D;
+})();
+var E = (function () {
+    function E() {
+    }
+    return E;
+})();
+var F = (function (_super) {
+    __extends(F, _super);
+    function F() {
+        _super.apply(this, arguments);
+    }
+    return F;
+})(C);
+var C1 = (function () {
+    function C1() {
+        this.i = "foo";
+    }
+    return C1;
+})();
+var D1 = (function (_super) {
+    __extends(D1, _super);
+    function D1() {
+        _super.apply(this, arguments);
+        this.i = "bar";
+    }
+    return D1;
+})(C1);
+var t1;
+var t2;
+var t3;
+var t4;
+var t5;
+var e11 = t1[4]; // base
+var e21 = t2[4]; // {}
+var e31 = t3[4]; // C1
+var e41 = t4[2]; // base1
+var e51 = t5[2]; // {}