Implicit index signatures

src/compiler/diagnosticMessages.json

@@ -1699,6 +1699,10 @@
         "category": "Error",
         "code": 2529
     },
+    "Property '{0}' is incompatible with index signature.": {
+        "category": "Error",
+        "code": 2530
+    },
     "JSX element attributes type '{0}' may not be a union type.": {
         "category": "Error",
         "code": 2600

tests/baselines/reference/augmentedTypeAssignmentCompatIndexSignature.errors.txt

@@ -1,10 +1,8 @@
-tests/cases/conformance/types/members/augmentedTypeAssignmentCompatIndexSignature.ts(15,5): error TS2322: Type '{}' is not assignable to type '{ [n: number]: Foo; }'.
-  Index signature is missing in type '{}'.
 tests/cases/conformance/types/members/augmentedTypeAssignmentCompatIndexSignature.ts(19,5): error TS2322: Type '() => void' is not assignable to type '{ [n: number]: Bar; }'.
   Index signature is missing in type '() => void'.
 
 
-==== tests/cases/conformance/types/members/augmentedTypeAssignmentCompatIndexSignature.ts (2 errors) ====
+==== tests/cases/conformance/types/members/augmentedTypeAssignmentCompatIndexSignature.ts (1 errors) ====
     interface Foo { a }
     interface Bar { b }
 
@@ -20,9 +18,6 @@ tests/cases/conformance/types/members/augmentedTypeAssignmentCompatIndexSignatur
     var f = () => { };
 
     var v1: {
-        ~~
-!!! error TS2322: Type '{}' is not assignable to type '{ [n: number]: Foo; }'.
-!!! error TS2322:   Index signature is missing in type '{}'.
         [n: number]: Foo
     } = o; // Should be allowed
 

tests/baselines/reference/badOverloadError.types

@@ -6,6 +6,6 @@ function method() {
 >dictionary : { [index: string]: string; }
 ><{ [index: string]: string; }>{} : { [index: string]: string; }
 >index : string
->{} : { [x: string]: undefined; }
+>{} : {}
 }
 

tests/baselines/reference/bestCommonTypeWithContextualTyping.types

@@ -36,7 +36,7 @@ var obj: { [s: string]: Contextual } = { s: e }; // { s: Ellement; [s: string]:
 >obj : { [s: string]: Contextual; }
 >s : string
 >Contextual : Contextual
->{ s: e } : { [x: string]: Ellement; s: Ellement; }
+>{ s: e } : { s: Ellement; }
 >s : Ellement
 >e : Ellement
 

tests/baselines/reference/compoundAdditionAssignmentLHSCanBeAssigned.types

@@ -98,7 +98,7 @@ x2 += E.a;
 x2 += {};
 >x2 += {} : string
 >x2 : string
->{} : { [x: number]: undefined; }
+>{} : {}
 
 x2 += null;
 >x2 += null : string

tests/baselines/reference/computedPropertyNames10_ES5.types

@@ -9,8 +9,8 @@ var a: any;
 >a : any
 
 var v = {
->v : { [0](): void; [""](): void; }
->{    [s]() { },    [n]() { },    [s + s]() { },    [s + n]() { },    [+s]() { },    [""]() { },    [0]() { },    [a]() { },    [<any>true]() { },    [`hello bye`]() { },    [`hello ${a} bye`]() { }} : { [0](): void; [""](): void; }
+>v : { [x: string]: () => void; [x: number]: () => void; [0](): void; [""](): void; }
+>{    [s]() { },    [n]() { },    [s + s]() { },    [s + n]() { },    [+s]() { },    [""]() { },    [0]() { },    [a]() { },    [<any>true]() { },    [`hello bye`]() { },    [`hello ${a} bye`]() { }} : { [x: string]: () => void; [x: number]: () => void; [0](): void; [""](): void; }
 
     [s]() { },
 >s : string

tests/baselines/reference/computedPropertyNames10_ES6.types

@@ -9,8 +9,8 @@ var a: any;
 >a : any
 
 var v = {
->v : { [0](): void; [""](): void; }
->{    [s]() { },    [n]() { },    [s + s]() { },    [s + n]() { },    [+s]() { },    [""]() { },    [0]() { },    [a]() { },    [<any>true]() { },    [`hello bye`]() { },    [`hello ${a} bye`]() { }} : { [0](): void; [""](): void; }
+>v : { [x: string]: () => void; [x: number]: () => void; [0](): void; [""](): void; }
+>{    [s]() { },    [n]() { },    [s + s]() { },    [s + n]() { },    [+s]() { },    [""]() { },    [0]() { },    [a]() { },    [<any>true]() { },    [`hello bye`]() { },    [`hello ${a} bye`]() { }} : { [x: string]: () => void; [x: number]: () => void; [0](): void; [""](): void; }
 
     [s]() { },
 >s : string

tests/baselines/reference/computedPropertyNames11_ES5.types

@@ -9,8 +9,8 @@ var a: any;
 >a : any
 
 var v = {
->v : { readonly [0]: number; [""]: any; }
->{    get [s]() { return 0; },    set [n](v) { },    get [s + s]() { return 0; },    set [s + n](v) { },    get [+s]() { return 0; },    set [""](v) { },    get [0]() { return 0; },    set [a](v) { },    get [<any>true]() { return 0; },    set [`hello bye`](v) { },    get [`hello ${a} bye`]() { return 0; }} : { readonly [0]: number; [""]: any; }
+>v : { [x: string]: any; [x: number]: any; readonly [0]: number; [""]: any; }
+>{    get [s]() { return 0; },    set [n](v) { },    get [s + s]() { return 0; },    set [s + n](v) { },    get [+s]() { return 0; },    set [""](v) { },    get [0]() { return 0; },    set [a](v) { },    get [<any>true]() { return 0; },    set [`hello bye`](v) { },    get [`hello ${a} bye`]() { return 0; }} : { [x: string]: any; [x: number]: any; readonly [0]: number; [""]: any; }
 
     get [s]() { return 0; },
 >s : string

tests/baselines/reference/computedPropertyNames11_ES6.types

@@ -9,8 +9,8 @@ var a: any;
 >a : any
 
 var v = {
->v : { readonly [0]: number; [""]: any; }
->{    get [s]() { return 0; },    set [n](v) { },    get [s + s]() { return 0; },    set [s + n](v) { },    get [+s]() { return 0; },    set [""](v) { },    get [0]() { return 0; },    set [a](v) { },    get [<any>true]() { return 0; },    set [`hello bye`](v) { },    get [`hello ${a} bye`]() { return 0; }} : { readonly [0]: number; [""]: any; }
+>v : { [x: string]: any; [x: number]: any; readonly [0]: number; [""]: any; }
+>{    get [s]() { return 0; },    set [n](v) { },    get [s + s]() { return 0; },    set [s + n](v) { },    get [+s]() { return 0; },    set [""](v) { },    get [0]() { return 0; },    set [a](v) { },    get [<any>true]() { return 0; },    set [`hello bye`](v) { },    get [`hello ${a} bye`]() { return 0; }} : { [x: string]: any; [x: number]: any; readonly [0]: number; [""]: any; }
 
     get [s]() { return 0; },
 >s : string

tests/baselines/reference/computedPropertyNames18_ES5.types

@@ -3,8 +3,8 @@ function foo() {
 >foo : () => void
 
     var obj = {
->obj : {}
->{        [this.bar]: 0    } : {}
+>obj : { [x: number]: number; }
+>{        [this.bar]: 0    } : { [x: number]: number; }
 
         [this.bar]: 0
 >this.bar : any

tests/baselines/reference/computedPropertyNames18_ES6.types

@@ -3,8 +3,8 @@ function foo() {
 >foo : () => void
 
     var obj = {
->obj : {}
->{        [this.bar]: 0    } : {}
+>obj : { [x: number]: number; }
+>{        [this.bar]: 0    } : { [x: number]: number; }
 
         [this.bar]: 0
 >this.bar : any

tests/baselines/reference/computedPropertyNames1_ES5.types

@@ -1,7 +1,7 @@
 === tests/cases/conformance/es6/computedProperties/computedPropertyNames1_ES5.ts ===
 var v = {
->v : {}
->{    get [0 + 1]() { return 0 },    set [0 + 1](v: string) { } //No error} : {}
+>v : { [x: number]: number | string; }
+>{    get [0 + 1]() { return 0 },    set [0 + 1](v: string) { } //No error} : { [x: number]: number | string; }
 
     get [0 + 1]() { return 0 },
 >0 + 1 : number

tests/baselines/reference/computedPropertyNames1_ES6.types

@@ -1,7 +1,7 @@
 === tests/cases/conformance/es6/computedProperties/computedPropertyNames1_ES6.ts ===
 var v = {
->v : {}
->{    get [0 + 1]() { return 0 },    set [0 + 1](v: string) { } //No error} : {}
+>v : { [x: number]: number | string; }
+>{    get [0 + 1]() { return 0 },    set [0 + 1](v: string) { } //No error} : { [x: number]: number | string; }
 
     get [0 + 1]() { return 0 },
 >0 + 1 : number

tests/baselines/reference/computedPropertyNames20_ES5.types

@@ -1,7 +1,7 @@
 === tests/cases/conformance/es6/computedProperties/computedPropertyNames20_ES5.ts ===
 var obj = {
->obj : {}
->{    [this.bar]: 0} : {}
+>obj : { [x: number]: number; }
+>{    [this.bar]: 0} : { [x: number]: number; }
 
     [this.bar]: 0
 >this.bar : any

tests/baselines/reference/computedPropertyNames20_ES6.types

@@ -1,7 +1,7 @@
 === tests/cases/conformance/es6/computedProperties/computedPropertyNames20_ES6.ts ===
 var obj = {
->obj : {}
->{    [this.bar]: 0} : {}
+>obj : { [x: number]: number; }
+>{    [this.bar]: 0} : { [x: number]: number; }
 
     [this.bar]: 0
 >this.bar : any

tests/baselines/reference/computedPropertyNames22_ES5.types

@@ -6,8 +6,8 @@ class C {
 >bar : () => number
 
         var obj = {
->obj : {}
->{            [this.bar()]() { }        } : {}
+>obj : { [x: number]: () => void; }
+>{            [this.bar()]() { }        } : { [x: number]: () => void; }
 
             [this.bar()]() { }
 >this.bar() : number

tests/baselines/reference/computedPropertyNames22_ES6.types

@@ -6,8 +6,8 @@ class C {
 >bar : () => number
 
         var obj = {
->obj : {}
->{            [this.bar()]() { }        } : {}
+>obj : { [x: number]: () => void; }
+>{            [this.bar()]() { }        } : { [x: number]: () => void; }
 
             [this.bar()]() { }
 >this.bar() : number

tests/baselines/reference/computedPropertyNames25_ES5.types

@@ -17,8 +17,8 @@ class C extends Base {
 >foo : () => number
 
         var obj = {
->obj : {}
->{            [super.bar()]() { }        } : {}
+>obj : { [x: number]: () => void; }
+>{            [super.bar()]() { }        } : { [x: number]: () => void; }
 
             [super.bar()]() { }
 >super.bar() : number

tests/baselines/reference/computedPropertyNames25_ES6.types

@@ -17,8 +17,8 @@ class C extends Base {
 >foo : () => number
 
         var obj = {
->obj : {}
->{            [super.bar()]() { }        } : {}
+>obj : { [x: number]: () => void; }
+>{            [super.bar()]() { }        } : { [x: number]: () => void; }
 
             [super.bar()]() { }
 >super.bar() : number

tests/baselines/reference/computedPropertyNames28_ES5.types

@@ -12,8 +12,8 @@ class C extends Base {
 >super : typeof Base
 
         var obj = {
->obj : {}
->{            [(super(), "prop")]() { }        } : {}
+>obj : { [x: string]: () => void; }
+>{            [(super(), "prop")]() { }        } : { [x: string]: () => void; }
 
             [(super(), "prop")]() { }
 >(super(), "prop") : string

tests/baselines/reference/computedPropertyNames28_ES6.types

@@ -12,8 +12,8 @@ class C extends Base {
 >super : typeof Base
 
         var obj = {
->obj : {}
->{            [(super(), "prop")]() { }        } : {}
+>obj : { [x: string]: () => void; }
+>{            [(super(), "prop")]() { }        } : { [x: string]: () => void; }
 
             [(super(), "prop")]() { }
 >(super(), "prop") : string

tests/baselines/reference/computedPropertyNames29_ES5.types

@@ -9,8 +9,8 @@ class C {
 >() => {            var obj = {                [this.bar()]() { } // needs capture            };        } : () => void
 
             var obj = {
->obj : {}
->{                [this.bar()]() { } // needs capture            } : {}
+>obj : { [x: number]: () => void; }
+>{                [this.bar()]() { } // needs capture            } : { [x: number]: () => void; }
 
                 [this.bar()]() { } // needs capture
 >this.bar() : number

tests/baselines/reference/computedPropertyNames29_ES6.types

@@ -9,8 +9,8 @@ class C {
 >() => {            var obj = {                [this.bar()]() { } // needs capture            };        } : () => void
 
             var obj = {
->obj : {}
->{                [this.bar()]() { } // needs capture            } : {}
+>obj : { [x: number]: () => void; }
+>{                [this.bar()]() { } // needs capture            } : { [x: number]: () => void; }
 
                 [this.bar()]() { } // needs capture
 >this.bar() : number

tests/baselines/reference/computedPropertyNames31_ES5.types

@@ -20,8 +20,8 @@ class C extends Base {
 >() => {            var obj = {                [super.bar()]() { } // needs capture            };        } : () => void
 
             var obj = {
->obj : {}
->{                [super.bar()]() { } // needs capture            } : {}
+>obj : { [x: number]: () => void; }
+>{                [super.bar()]() { } // needs capture            } : { [x: number]: () => void; }
 
                 [super.bar()]() { } // needs capture
 >super.bar() : number

tests/baselines/reference/computedPropertyNames31_ES6.types

@@ -20,8 +20,8 @@ class C extends Base {
 >() => {            var obj = {                [super.bar()]() { } // needs capture            };        } : () => void
 
             var obj = {
->obj : {}
->{                [super.bar()]() { } // needs capture            } : {}
+>obj : { [x: number]: () => void; }
+>{                [super.bar()]() { } // needs capture            } : { [x: number]: () => void; }
 
                 [super.bar()]() { } // needs capture
 >super.bar() : number

tests/baselines/reference/computedPropertyNames33_ES5.types

@@ -12,8 +12,8 @@ class C<T> {
 >bar : () => number
 
         var obj = {
->obj : {}
->{            [foo<T>()]() { }        } : {}
+>obj : { [x: string]: () => void; }
+>{            [foo<T>()]() { }        } : { [x: string]: () => void; }
 
             [foo<T>()]() { }
 >foo<T>() : string

tests/baselines/reference/computedPropertyNames33_ES6.types

@@ -12,8 +12,8 @@ class C<T> {
 >bar : () => number
 
         var obj = {
->obj : {}
->{            [foo<T>()]() { }        } : {}
+>obj : { [x: string]: () => void; }
+>{            [foo<T>()]() { }        } : { [x: string]: () => void; }
 
             [foo<T>()]() { }
 >foo<T>() : string

tests/baselines/reference/computedPropertyNames46_ES5.types

@@ -1,7 +1,7 @@
 === tests/cases/conformance/es6/computedProperties/computedPropertyNames46_ES5.ts ===
 var o = {
->o : {}
->{    ["" || 0]: 0} : {}
+>o : { [x: string]: number; }
+>{    ["" || 0]: 0} : { [x: string]: number; }
 
     ["" || 0]: 0
 >"" || 0 : string | number

tests/baselines/reference/computedPropertyNames46_ES6.types

@@ -1,7 +1,7 @@
 === tests/cases/conformance/es6/computedProperties/computedPropertyNames46_ES6.ts ===
 var o = {
->o : {}
->{    ["" || 0]: 0} : {}
+>o : { [x: string]: number; }
+>{    ["" || 0]: 0} : { [x: string]: number; }
 
     ["" || 0]: 0
 >"" || 0 : string | number

tests/baselines/reference/computedPropertyNames47_ES5.types

@@ -8,8 +8,8 @@ enum E2 { x }
 >x : E2
 
 var o = {
->o : {}
->{    [E1.x || E2.x]: 0} : {}
+>o : { [x: number]: number; }
+>{    [E1.x || E2.x]: 0} : { [x: number]: number; }
 
     [E1.x || E2.x]: 0
 >E1.x || E2.x : E1 | E2

tests/baselines/reference/computedPropertyNames47_ES6.types

@@ -8,8 +8,8 @@ enum E2 { x }
 >x : E2
 
 var o = {
->o : {}
->{    [E1.x || E2.x]: 0} : {}
+>o : { [x: number]: number; }
+>{    [E1.x || E2.x]: 0} : { [x: number]: number; }
 
     [E1.x || E2.x]: 0
 >E1.x || E2.x : E1 | E2

tests/baselines/reference/computedPropertyNames48_ES5.types

@@ -39,9 +39,9 @@ extractIndexer({
 }); // Should return string
 
 extractIndexer({
->extractIndexer({    ["" || 0]: ""}) : any
+>extractIndexer({    ["" || 0]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    ["" || 0]: ""} : { [x: number]: undefined; }
+>{    ["" || 0]: ""} : { [x: string]: string; }
 
     ["" || 0]: ""
 >"" || 0 : string | number

tests/baselines/reference/computedPropertyNames48_ES6.types

@@ -39,9 +39,9 @@ extractIndexer({
 }); // Should return string
 
 extractIndexer({
->extractIndexer({    ["" || 0]: ""}) : any
+>extractIndexer({    ["" || 0]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    ["" || 0]: ""} : { [x: number]: undefined; }
+>{    ["" || 0]: ""} : { [x: string]: string; }
 
     ["" || 0]: ""
 >"" || 0 : string | number

tests/baselines/reference/computedPropertyNames4_ES5.types

@@ -9,8 +9,8 @@ var a: any;
 >a : any
 
 var v = {
->v : { [0]: number; [""]: number; }
->{    [s]: 0,    [n]: n,    [s + s]: 1,    [s + n]: 2,    [+s]: s,    [""]: 0,    [0]: 0,    [a]: 1,    [<any>true]: 0,    [`hello bye`]: 0,    [`hello ${a} bye`]: 0} : { [0]: number; [""]: number; }
+>v : { [x: string]: number | string; [x: number]: number | string; [0]: number; [""]: number; }
+>{    [s]: 0,    [n]: n,    [s + s]: 1,    [s + n]: 2,    [+s]: s,    [""]: 0,    [0]: 0,    [a]: 1,    [<any>true]: 0,    [`hello bye`]: 0,    [`hello ${a} bye`]: 0} : { [x: string]: number | string; [x: number]: number | string; [0]: number; [""]: number; }
 
     [s]: 0,
 >s : string

tests/baselines/reference/computedPropertyNames4_ES6.types

@@ -9,8 +9,8 @@ var a: any;
 >a : any
 
 var v = {
->v : { [0]: number; [""]: number; }
->{    [s]: 0,    [n]: n,    [s + s]: 1,    [s + n]: 2,    [+s]: s,    [""]: 0,    [0]: 0,    [a]: 1,    [<any>true]: 0,    [`hello bye`]: 0,    [`hello ${a} bye`]: 0} : { [0]: number; [""]: number; }
+>v : { [x: string]: number | string; [x: number]: number | string; [0]: number; [""]: number; }
+>{    [s]: 0,    [n]: n,    [s + s]: 1,    [s + n]: 2,    [+s]: s,    [""]: 0,    [0]: 0,    [a]: 1,    [<any>true]: 0,    [`hello bye`]: 0,    [`hello ${a} bye`]: 0} : { [x: string]: number | string; [x: number]: number | string; [0]: number; [""]: number; }
 
     [s]: 0,
 >s : string

tests/baselines/reference/computedPropertyNames7_ES5.types

@@ -6,8 +6,8 @@ enum E {
 >member : E
 }
 var v = {
->v : {}
->{    [E.member]: 0} : {}
+>v : { [x: number]: number; }
+>{    [E.member]: 0} : { [x: number]: number; }
 
     [E.member]: 0
 >E.member : E