Merge pull request #822 from Microsoft/tupleConformance

Tuple conformance
This commit is contained in:
Yui 2014-10-06 11:14:23 -07:00
commit 85fd141be2
24 changed files with 1137 additions and 0 deletions

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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 '{}[]'.

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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;

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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

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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]

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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]; // {}

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=== tests/cases/conformance/types/typeRelationships/bestCommonType/bestCommonTypeOfTuple2.ts ===
interface base { }
>base : base
interface base1 { i }
>base1 : base1
>i : any
class C implements base { c }
>C : C
>base : base
>c : any
class D implements base { d }
>D : D
>base : base
>d : any
class E implements base { e }
>E : E
>base : base
>e : any
class F extends C { f }
>F : F
>C : C
>f : any
class C1 implements base1 { i = "foo"; c }
>C1 : C1
>base1 : base1
>i : string
>c : any
class D1 extends C1 { i = "bar"; d }
>D1 : D1
>C1 : C1
>i : string
>d : any
var t1: [C, base];
>t1 : [C, base]
>C : C
>base : base
var t2: [C, D];
>t2 : [C, D]
>C : C
>D : D
var t3: [C1, D1];
>t3 : [C1, D1]
>C1 : C1
>D1 : D1
var t4: [base1, C1];
>t4 : [base1, C1]
>base1 : base1
>C1 : C1
var t5: [C1, F]
>t5 : [C1, F]
>C1 : C1
>F : F
var e11 = t1[4]; // base
>e11 : base
>t1[4] : base
>t1 : [C, base]
var e21 = t2[4]; // {}
>e21 : {}
>t2[4] : {}
>t2 : [C, D]
var e31 = t3[4]; // C1
>e31 : C1
>t3[4] : C1
>t3 : [C1, D1]
var e41 = t4[2]; // base1
>e41 : base1
>t4[2] : base1
>t4 : [base1, C1]
var e51 = t5[2]; // {}
>e51 : {}
>t5[2] : {}
>t5 : [C1, F]

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tests/cases/conformance/types/tuple/castingTuple.ts(24,10): error TS2353: Neither type '[number, string]' nor type '[number, number]' is assignable to the other:
Types of property '1' are incompatible:
Type 'string' is not assignable to type 'number'.
tests/cases/conformance/types/tuple/castingTuple.ts(25,10): error TS2353: Neither type '[C, D]' nor type '[A, I]' is assignable to the other:
Types of property '0' are incompatible:
Type 'C' is not assignable to type 'A':
Property 'a' is missing in type 'C'.
tests/cases/conformance/types/tuple/castingTuple.ts(26,5): error TS2403: Subsequent variable declarations must have the same type. Variable 'array1' must be of type '{}[]', but here has type 'number[]'.
tests/cases/conformance/types/tuple/castingTuple.ts(26,14): error TS2353: Neither type '[number, string]' nor type 'number[]' is assignable to the other:
Types of property 'pop' are incompatible:
Type '() => {}' is not assignable to type '() => number':
Type '{}' is not assignable to type 'number'.
tests/cases/conformance/types/tuple/castingTuple.ts(27,1): error TS2304: Cannot find name 't4'.
==== tests/cases/conformance/types/tuple/castingTuple.ts (5 errors) ====
interface I { }
class A { a = 10; }
class C implements I { c };
class D implements I { d };
class E extends A { e };
class F extends A { f };
enum E1 { one }
enum E2 { one }
// no error
var numStrTuple: [number, string] = [5, "foo"];
var emptyObjTuple = <[{}, {}]>numStrTuple;
var numStrBoolTuple = <[number, string, boolean]>numStrTuple;
var classCDTuple: [C, D] = [new C(), new D()];
var interfaceIITuple = <[I, I]>classCDTuple;
var classCDATuple = <[C, D, A]>classCDTuple;
var eleFromCDA1 = classCDATuple[2]; // A
var eleFromCDA2 = classCDATuple[5]; // {}
var t10: [E1, E2] = [E1.one, E2.one];
var t11 = <[number, number]>t10;
var array1 = <{}[]>emptyObjTuple;
// error
var t3 = <[number, number]>numStrTuple;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! error TS2353: Neither type '[number, string]' nor type '[number, number]' is assignable to the other:
!!! error TS2353: Types of property '1' are incompatible:
!!! error TS2353: Type 'string' is not assignable to type 'number'.
var t9 = <[A, I]>classCDTuple;
~~~~~~~~~~~~~~~~~~~~
!!! error TS2353: Neither type '[C, D]' nor type '[A, I]' is assignable to the other:
!!! error TS2353: Types of property '0' are incompatible:
!!! error TS2353: Type 'C' is not assignable to type 'A':
!!! error TS2353: Property 'a' is missing in type 'C'.
var array1 = <number[]>numStrTuple;
~~~~~~
!!! error TS2403: Subsequent variable declarations must have the same type. Variable 'array1' must be of type '{}[]', but here has type 'number[]'.
~~~~~~~~~~~~~~~~~~~~~
!!! error TS2353: Neither type '[number, string]' nor type 'number[]' is assignable to the other:
!!! error TS2353: Types of property 'pop' are incompatible:
!!! error TS2353: Type '() => {}' is not assignable to type '() => number':
!!! error TS2353: Type '{}' is not assignable to type 'number'.
t4[2] = 10;
~~
!!! error TS2304: Cannot find name 't4'.

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//// [castingTuple.ts]
interface I { }
class A { a = 10; }
class C implements I { c };
class D implements I { d };
class E extends A { e };
class F extends A { f };
enum E1 { one }
enum E2 { one }
// no error
var numStrTuple: [number, string] = [5, "foo"];
var emptyObjTuple = <[{}, {}]>numStrTuple;
var numStrBoolTuple = <[number, string, boolean]>numStrTuple;
var classCDTuple: [C, D] = [new C(), new D()];
var interfaceIITuple = <[I, I]>classCDTuple;
var classCDATuple = <[C, D, A]>classCDTuple;
var eleFromCDA1 = classCDATuple[2]; // A
var eleFromCDA2 = classCDATuple[5]; // {}
var t10: [E1, E2] = [E1.one, E2.one];
var t11 = <[number, number]>t10;
var array1 = <{}[]>emptyObjTuple;
// error
var t3 = <[number, number]>numStrTuple;
var t9 = <[A, I]>classCDTuple;
var array1 = <number[]>numStrTuple;
t4[2] = 10;
//// [castingTuple.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 A = (function () {
function A() {
this.a = 10;
}
return A;
})();
var C = (function () {
function C() {
}
return C;
})();
;
var D = (function () {
function D() {
}
return D;
})();
;
var E = (function (_super) {
__extends(E, _super);
function E() {
_super.apply(this, arguments);
}
return E;
})(A);
;
var F = (function (_super) {
__extends(F, _super);
function F() {
_super.apply(this, arguments);
}
return F;
})(A);
;
var E1;
(function (E1) {
E1[E1["one"] = 0] = "one";
})(E1 || (E1 = {}));
var E2;
(function (E2) {
E2[E2["one"] = 0] = "one";
})(E2 || (E2 = {}));
// no error
var numStrTuple = [5, "foo"];
var emptyObjTuple = numStrTuple;
var numStrBoolTuple = numStrTuple;
var classCDTuple = [new C(), new D()];
var interfaceIITuple = classCDTuple;
var classCDATuple = classCDTuple;
var eleFromCDA1 = classCDATuple[2]; // A
var eleFromCDA2 = classCDATuple[5]; // {}
var t10 = [0 /* one */, 0 /* one */];
var t11 = t10;
var array1 = emptyObjTuple;
// error
var t3 = numStrTuple;
var t9 = classCDTuple;
var array1 = numStrTuple;
t4[2] = 10;

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tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(11,1): error TS2322: Type '[{}, number]' is not assignable to type '[{ a: string; }, number]':
Types of property '0' are incompatible:
Type '{}' is not assignable to type '{ a: string; }':
Property 'a' is missing in type '{}'.
tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(12,1): error TS2322: Type '[number, string]' is not assignable to type '[number, string, boolean]':
Property '2' is missing in type '[number, string]'.
tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(13,5): error TS2322: Type '[string, string, number]' is not assignable to type '[string, string]':
Types of property 'pop' are incompatible:
Type '() => {}' is not assignable to type '() => string':
Type '{}' is not assignable to type 'string'.
==== tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts (3 errors) ====
// no error
var numStrTuple: [number, string] = [5, "hello"];
var numStrTuple2: [number, string] = [5, "foo", true];
var numStrBoolTuple: [number, string, boolean] = [5, "foo", true];
var objNumTuple: [{ a: string }, number] = [{ a: "world" }, 5];
var strTupleTuple: [string, [number, {}]] = ["bar", [5, { x: 1, y: 1 }]];
numStrTuple = numStrTuple2;
numStrTuple = numStrBoolTuple;
// error
objNumTuple = [ {}, 5];
~~~~~~~~~~~
!!! error TS2322: Type '[{}, number]' is not assignable to type '[{ a: string; }, number]':
!!! error TS2322: Types of property '0' are incompatible:
!!! error TS2322: Type '{}' is not assignable to type '{ a: string; }':
!!! error TS2322: Property 'a' is missing in type '{}'.
numStrBoolTuple = numStrTuple;
~~~~~~~~~~~~~~~
!!! error TS2322: Type '[number, string]' is not assignable to type '[number, string, boolean]':
!!! error TS2322: Property '2' is missing in type '[number, string]'.
var strStrTuple: [string, string] = ["foo", "bar", 5];
~~~~~~~~~~~
!!! error TS2322: Type '[string, string, number]' is not assignable to type '[string, string]':
!!! error TS2322: Types of property 'pop' are incompatible:
!!! error TS2322: Type '() => {}' is not assignable to type '() => string':
!!! error TS2322: Type '{}' is not assignable to type 'string'.

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//// [contextualTypeWithTuple.ts]
// no error
var numStrTuple: [number, string] = [5, "hello"];
var numStrTuple2: [number, string] = [5, "foo", true];
var numStrBoolTuple: [number, string, boolean] = [5, "foo", true];
var objNumTuple: [{ a: string }, number] = [{ a: "world" }, 5];
var strTupleTuple: [string, [number, {}]] = ["bar", [5, { x: 1, y: 1 }]];
numStrTuple = numStrTuple2;
numStrTuple = numStrBoolTuple;
// error
objNumTuple = [ {}, 5];
numStrBoolTuple = numStrTuple;
var strStrTuple: [string, string] = ["foo", "bar", 5];
//// [contextualTypeWithTuple.js]
// no error
var numStrTuple = [5, "hello"];
var numStrTuple2 = [5, "foo", true];
var numStrBoolTuple = [5, "foo", true];
var objNumTuple = [{ a: "world" }, 5];
var strTupleTuple = ["bar", [5, { x: 1, y: 1 }]];
numStrTuple = numStrTuple2;
numStrTuple = numStrBoolTuple;
// error
objNumTuple = [{}, 5];
numStrBoolTuple = numStrTuple;
var strStrTuple = ["foo", "bar", 5];

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tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(22,1): error TS2322: Type '[number, string]' is not assignable to type '[string, number]':
Types of property '0' are incompatible:
Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(23,1): error TS2322: Type '[{}, {}]' is not assignable to type '[string, number]':
Types of property '0' are incompatible:
Type '{}' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(24,1): error TS2322: Type '[{}]' is not assignable to type '[{}, {}]':
Property '1' is missing in type '[{}]'.
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts (3 errors) ====
interface I<T, U> {
tuple1: [T, U];
}
var i1: I<string, number>;
var i2: I<{}, {}>;
// no error
i1.tuple1 = ["foo", 5];
var e1 = i1.tuple1[0]; // string
var e2 = i1.tuple1[1]; // number
i1.tuple1 = ["foo", 5, false, true];
var e3 = i1.tuple1[2]; // {}
i1.tuple1[3] = { a: "string" };
var e4 = i1.tuple1[3]; // {}
i2.tuple1 = ["foo", 5];
i2.tuple1 = ["foo", "bar"];
i2.tuple1 = [5, "bar"];
i2.tuple1 = [{}, {}];
// error
i1.tuple1 = [5, "foo"];
~~~~~~~~~
!!! error TS2322: Type '[number, string]' is not assignable to type '[string, number]':
!!! error TS2322: Types of property '0' are incompatible:
!!! error TS2322: Type 'number' is not assignable to type 'string'.
i1.tuple1 = [{}, {}];
~~~~~~~~~
!!! error TS2322: Type '[{}, {}]' is not assignable to type '[string, number]':
!!! error TS2322: Types of property '0' are incompatible:
!!! error TS2322: Type '{}' is not assignable to type 'string'.
i2.tuple1 = [{}];
~~~~~~~~~
!!! error TS2322: Type '[{}]' is not assignable to type '[{}, {}]':
!!! error TS2322: Property '1' is missing in type '[{}]'.

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//// [genericCallWithTupleType.ts]
interface I<T, U> {
tuple1: [T, U];
}
var i1: I<string, number>;
var i2: I<{}, {}>;
// no error
i1.tuple1 = ["foo", 5];
var e1 = i1.tuple1[0]; // string
var e2 = i1.tuple1[1]; // number
i1.tuple1 = ["foo", 5, false, true];
var e3 = i1.tuple1[2]; // {}
i1.tuple1[3] = { a: "string" };
var e4 = i1.tuple1[3]; // {}
i2.tuple1 = ["foo", 5];
i2.tuple1 = ["foo", "bar"];
i2.tuple1 = [5, "bar"];
i2.tuple1 = [{}, {}];
// error
i1.tuple1 = [5, "foo"];
i1.tuple1 = [{}, {}];
i2.tuple1 = [{}];
//// [genericCallWithTupleType.js]
var i1;
var i2;
// no error
i1.tuple1 = ["foo", 5];
var e1 = i1.tuple1[0]; // string
var e2 = i1.tuple1[1]; // number
i1.tuple1 = ["foo", 5, false, true];
var e3 = i1.tuple1[2]; // {}
i1.tuple1[3] = { a: "string" };
var e4 = i1.tuple1[3]; // {}
i2.tuple1 = ["foo", 5];
i2.tuple1 = ["foo", "bar"];
i2.tuple1 = [5, "bar"];
i2.tuple1 = [{}, {}];
// error
i1.tuple1 = [5, "foo"];
i1.tuple1 = [{}, {}];
i2.tuple1 = [{}];

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//// [indexerWithTuple.ts]
var strNumTuple: [string, number] = ["foo", 10];
var numTupleTuple: [number, [string, number]] = [10, ["bar", 20]];
// no error
var idx0 = 0;
var idx1 = 1;
var ele10 = strNumTuple[0]; // string
var ele11 = strNumTuple[1]; // number
var ele12 = strNumTuple[2]; // {}
var ele13 = strNumTuple[idx0]; // {}
var ele14 = strNumTuple[idx1]; // {}
var ele15 = strNumTuple["0"]; // string
var ele16 = strNumTuple["1"]; // number
var strNumTuple1 = numTupleTuple[1]; //[string, number];
var ele17 = numTupleTuple[2]; // {}
//// [indexerWithTuple.js]
var strNumTuple = ["foo", 10];
var numTupleTuple = [10, ["bar", 20]];
// no error
var idx0 = 0;
var idx1 = 1;
var ele10 = strNumTuple[0]; // string
var ele11 = strNumTuple[1]; // number
var ele12 = strNumTuple[2]; // {}
var ele13 = strNumTuple[idx0]; // {}
var ele14 = strNumTuple[idx1]; // {}
var ele15 = strNumTuple["0"]; // string
var ele16 = strNumTuple["1"]; // number
var strNumTuple1 = numTupleTuple[1]; //[string, number];
var ele17 = numTupleTuple[2]; // {}

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=== tests/cases/conformance/types/tuple/indexerWithTuple.ts ===
var strNumTuple: [string, number] = ["foo", 10];
>strNumTuple : [string, number]
>["foo", 10] : [string, number]
var numTupleTuple: [number, [string, number]] = [10, ["bar", 20]];
>numTupleTuple : [number, [string, number]]
>[10, ["bar", 20]] : [number, [string, number]]
>["bar", 20] : [string, number]
// no error
var idx0 = 0;
>idx0 : number
var idx1 = 1;
>idx1 : number
var ele10 = strNumTuple[0]; // string
>ele10 : string
>strNumTuple[0] : string
>strNumTuple : [string, number]
var ele11 = strNumTuple[1]; // number
>ele11 : number
>strNumTuple[1] : number
>strNumTuple : [string, number]
var ele12 = strNumTuple[2]; // {}
>ele12 : {}
>strNumTuple[2] : {}
>strNumTuple : [string, number]
var ele13 = strNumTuple[idx0]; // {}
>ele13 : {}
>strNumTuple[idx0] : {}
>strNumTuple : [string, number]
>idx0 : number
var ele14 = strNumTuple[idx1]; // {}
>ele14 : {}
>strNumTuple[idx1] : {}
>strNumTuple : [string, number]
>idx1 : number
var ele15 = strNumTuple["0"]; // string
>ele15 : string
>strNumTuple["0"] : string
>strNumTuple : [string, number]
var ele16 = strNumTuple["1"]; // number
>ele16 : number
>strNumTuple["1"] : number
>strNumTuple : [string, number]
var strNumTuple1 = numTupleTuple[1]; //[string, number];
>strNumTuple1 : [string, number]
>numTupleTuple[1] : [string, number]
>numTupleTuple : [number, [string, number]]
var ele17 = numTupleTuple[2]; // {}
>ele17 : {}
>numTupleTuple[2] : {}
>numTupleTuple : [number, [string, number]]

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//// [typeInferenceWithTupleType.ts]
function combine<T, U>(x: T, y: U): [T, U] {
return [x, y];
}
var combineResult = combine("string", 10);
var combineEle1 = combineResult[0]; // string
var combineEle2 = combineResult[1]; // number
function zip<T, U>(array1: T[], array2: U[]): [[T, U]] {
if (array1.length != array2.length) {
return [[undefined, undefined]];
}
var length = array1.length;
var zipResult: [[T, U]];
for (var i = 0; i < length; ++i) {
zipResult.push([array1[i], array2[i]]);
}
return zipResult;
}
var zipResult = zip(["foo", "bar"], [5, 6]);
var zipResultEle = zipResult[0]; // [string, number]
var zipResultEleEle = zipResult[0][0]; // string
//// [typeInferenceWithTupleType.js]
function combine(x, y) {
return [x, y];
}
var combineResult = combine("string", 10);
var combineEle1 = combineResult[0]; // string
var combineEle2 = combineResult[1]; // number
function zip(array1, array2) {
if (array1.length != array2.length) {
return [[undefined, undefined]];
}
var length = array1.length;
var zipResult;
for (var i = 0; i < length; ++i) {
zipResult.push([array1[i], array2[i]]);
}
return zipResult;
}
var zipResult = zip(["foo", "bar"], [5, 6]);
var zipResultEle = zipResult[0]; // [string, number]
var zipResultEleEle = zipResult[0][0]; // string

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=== tests/cases/conformance/types/tuple/typeInferenceWithTupleType.ts ===
function combine<T, U>(x: T, y: U): [T, U] {
>combine : <T, U>(x: T, y: U) => [T, U]
>T : T
>U : U
>x : T
>T : T
>y : U
>U : U
>T : T
>U : U
return [x, y];
>[x, y] : [T, U]
>x : T
>y : U
}
var combineResult = combine("string", 10);
>combineResult : [string, number]
>combine("string", 10) : [string, number]
>combine : <T, U>(x: T, y: U) => [T, U]
var combineEle1 = combineResult[0]; // string
>combineEle1 : string
>combineResult[0] : string
>combineResult : [string, number]
var combineEle2 = combineResult[1]; // number
>combineEle2 : number
>combineResult[1] : number
>combineResult : [string, number]
function zip<T, U>(array1: T[], array2: U[]): [[T, U]] {
>zip : <T, U>(array1: T[], array2: U[]) => [[T, U]]
>T : T
>U : U
>array1 : T[]
>T : T
>array2 : U[]
>U : U
>T : T
>U : U
if (array1.length != array2.length) {
>array1.length != array2.length : boolean
>array1.length : number
>array1 : T[]
>length : number
>array2.length : number
>array2 : U[]
>length : number
return [[undefined, undefined]];
>[[undefined, undefined]] : [[undefined, undefined]]
>[undefined, undefined] : [undefined, undefined]
>undefined : undefined
>undefined : undefined
}
var length = array1.length;
>length : number
>array1.length : number
>array1 : T[]
>length : number
var zipResult: [[T, U]];
>zipResult : [[T, U]]
>T : T
>U : U
for (var i = 0; i < length; ++i) {
>i : number
>i < length : boolean
>i : number
>length : number
>++i : number
>i : number
zipResult.push([array1[i], array2[i]]);
>zipResult.push([array1[i], array2[i]]) : number
>zipResult.push : (...items: [T, U][]) => number
>zipResult : [[T, U]]
>push : (...items: [T, U][]) => number
>[array1[i], array2[i]] : [T, U]
>array1[i] : T
>array1 : T[]
>i : number
>array2[i] : U
>array2 : U[]
>i : number
}
return zipResult;
>zipResult : [[T, U]]
}
var zipResult = zip(["foo", "bar"], [5, 6]);
>zipResult : [[string, number]]
>zip(["foo", "bar"], [5, 6]) : [[string, number]]
>zip : <T, U>(array1: T[], array2: U[]) => [[T, U]]
>["foo", "bar"] : string[]
>[5, 6] : number[]
var zipResultEle = zipResult[0]; // [string, number]
>zipResultEle : [string, number]
>zipResult[0] : [string, number]
>zipResult : [[string, number]]
var zipResultEleEle = zipResult[0][0]; // string
>zipResultEleEle : string
>zipResult[0][0] : string
>zipResult[0] : [string, number]
>zipResult : [[string, number]]

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interface I { }
class A { a = 10; }
class C implements I { c };
class D implements I { d };
class E extends A { e };
class F extends A { f };
enum E1 { one }
enum E2 { one }
// no error
var numStrTuple: [number, string] = [5, "foo"];
var emptyObjTuple = <[{}, {}]>numStrTuple;
var numStrBoolTuple = <[number, string, boolean]>numStrTuple;
var classCDTuple: [C, D] = [new C(), new D()];
var interfaceIITuple = <[I, I]>classCDTuple;
var classCDATuple = <[C, D, A]>classCDTuple;
var eleFromCDA1 = classCDATuple[2]; // A
var eleFromCDA2 = classCDATuple[5]; // {}
var t10: [E1, E2] = [E1.one, E2.one];
var t11 = <[number, number]>t10;
var array1 = <{}[]>emptyObjTuple;
// error
var t3 = <[number, number]>numStrTuple;
var t9 = <[A, I]>classCDTuple;
var array1 = <number[]>numStrTuple;
t4[2] = 10;

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// no error
var numStrTuple: [number, string] = [5, "hello"];
var numStrTuple2: [number, string] = [5, "foo", true];
var numStrBoolTuple: [number, string, boolean] = [5, "foo", true];
var objNumTuple: [{ a: string }, number] = [{ a: "world" }, 5];
var strTupleTuple: [string, [number, {}]] = ["bar", [5, { x: 1, y: 1 }]];
numStrTuple = numStrTuple2;
numStrTuple = numStrBoolTuple;
// error
objNumTuple = [ {}, 5];
numStrBoolTuple = numStrTuple;
var strStrTuple: [string, string] = ["foo", "bar", 5];

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var strNumTuple: [string, number] = ["foo", 10];
var numTupleTuple: [number, [string, number]] = [10, ["bar", 20]];
// no error
var idx0 = 0;
var idx1 = 1;
var ele10 = strNumTuple[0]; // string
var ele11 = strNumTuple[1]; // number
var ele12 = strNumTuple[2]; // {}
var ele13 = strNumTuple[idx0]; // {}
var ele14 = strNumTuple[idx1]; // {}
var ele15 = strNumTuple["0"]; // string
var ele16 = strNumTuple["1"]; // number
var strNumTuple1 = numTupleTuple[1]; //[string, number];
var ele17 = numTupleTuple[2]; // {}

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function combine<T, U>(x: T, y: U): [T, U] {
return [x, y];
}
var combineResult = combine("string", 10);
var combineEle1 = combineResult[0]; // string
var combineEle2 = combineResult[1]; // number
function zip<T, U>(array1: T[], array2: U[]): [[T, U]] {
if (array1.length != array2.length) {
return [[undefined, undefined]];
}
var length = array1.length;
var zipResult: [[T, U]];
for (var i = 0; i < length; ++i) {
zipResult.push([array1[i], array2[i]]);
}
return zipResult;
}
var zipResult = zip(["foo", "bar"], [5, 6]);
var zipResultEle = zipResult[0]; // [string, number]
var zipResultEleEle = zipResult[0][0]; // string

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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;

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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

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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]; // {}

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interface I<T, U> {
tuple1: [T, U];
}
var i1: I<string, number>;
var i2: I<{}, {}>;
// no error
i1.tuple1 = ["foo", 5];
var e1 = i1.tuple1[0]; // string
var e2 = i1.tuple1[1]; // number
i1.tuple1 = ["foo", 5, false, true];
var e3 = i1.tuple1[2]; // {}
i1.tuple1[3] = { a: "string" };
var e4 = i1.tuple1[3]; // {}
i2.tuple1 = ["foo", 5];
i2.tuple1 = ["foo", "bar"];
i2.tuple1 = [5, "bar"];
i2.tuple1 = [{}, {}];
// error
i1.tuple1 = [5, "foo"];
i1.tuple1 = [{}, {}];
i2.tuple1 = [{}];