Merge pull request #10961 from YuichiNukiyama/change_errormessage

change error message for assigning from object
This commit is contained in:
Nathan Shively-Sanders
2016-09-21 08:47:31 -07:00
committed by GitHub
13 changed files with 143 additions and 36 deletions

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@@ -0,0 +1,38 @@
tests/cases/compiler/assigningFromObjectToAnythingElse.ts(3,1): error TS2322: Type 'Object' is not assignable to type 'RegExp'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Property 'exec' is missing in type 'Object'.
tests/cases/compiler/assigningFromObjectToAnythingElse.ts(5,5): error TS2322: Type 'Object' is not assignable to type 'String'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Property 'charAt' is missing in type 'Object'.
tests/cases/compiler/assigningFromObjectToAnythingElse.ts(6,5): error TS2322: Type 'Number' is not assignable to type 'String'.
Property 'charAt' is missing in type 'Number'.
tests/cases/compiler/assigningFromObjectToAnythingElse.ts(8,5): error TS2322: Type 'Object' is not assignable to type 'Error'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Property 'name' is missing in type 'Object'.
==== tests/cases/compiler/assigningFromObjectToAnythingElse.ts (4 errors) ====
var x: Object;
var y: RegExp;
y = x;
~
!!! error TS2322: Type 'Object' is not assignable to type 'RegExp'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Property 'exec' is missing in type 'Object'.
var a: String = Object.create<Object>("");
~
!!! error TS2322: Type 'Object' is not assignable to type 'String'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Property 'charAt' is missing in type 'Object'.
var c: String = Object.create<Number>(1);
~
!!! error TS2322: Type 'Number' is not assignable to type 'String'.
!!! error TS2322: Property 'charAt' is missing in type 'Number'.
var w: Error = new Object();
~
!!! error TS2322: Type 'Object' is not assignable to type 'Error'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Property 'name' is missing in type 'Object'.

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@@ -0,0 +1,18 @@
//// [assigningFromObjectToAnythingElse.ts]
var x: Object;
var y: RegExp;
y = x;
var a: String = Object.create<Object>("");
var c: String = Object.create<Number>(1);
var w: Error = new Object();
//// [assigningFromObjectToAnythingElse.js]
var x;
var y;
y = x;
var a = Object.create("");
var c = Object.create(1);
var w = new Object();

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@@ -2,7 +2,8 @@ tests/cases/compiler/intTypeCheck.ts(35,6): error TS2304: Cannot find name 'p'.
tests/cases/compiler/intTypeCheck.ts(71,6): error TS2304: Cannot find name 'p'.
tests/cases/compiler/intTypeCheck.ts(85,5): error TS2386: Overload signatures must all be optional or required.
tests/cases/compiler/intTypeCheck.ts(99,5): error TS2322: Type 'Object' is not assignable to type 'i1'.
Property 'p' is missing in type 'Object'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Property 'p' is missing in type 'Object'.
tests/cases/compiler/intTypeCheck.ts(100,16): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
tests/cases/compiler/intTypeCheck.ts(101,5): error TS2322: Type 'Base' is not assignable to type 'i1'.
Property 'p' is missing in type 'Base'.
@@ -15,7 +16,8 @@ tests/cases/compiler/intTypeCheck.ts(107,17): error TS2351: Cannot use 'new' wit
tests/cases/compiler/intTypeCheck.ts(112,5): error TS2322: Type '{}' is not assignable to type 'i2'.
Type '{}' provides no match for the signature '(): any'
tests/cases/compiler/intTypeCheck.ts(113,5): error TS2322: Type 'Object' is not assignable to type 'i2'.
Type 'Object' provides no match for the signature '(): any'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature '(): any'
tests/cases/compiler/intTypeCheck.ts(114,17): error TS2350: Only a void function can be called with the 'new' keyword.
tests/cases/compiler/intTypeCheck.ts(115,5): error TS2322: Type 'Base' is not assignable to type 'i2'.
Type 'Base' provides no match for the signature '(): any'
@@ -26,7 +28,8 @@ tests/cases/compiler/intTypeCheck.ts(121,17): error TS2351: Cannot use 'new' wit
tests/cases/compiler/intTypeCheck.ts(126,5): error TS2322: Type '{}' is not assignable to type 'i3'.
Type '{}' provides no match for the signature 'new (): any'
tests/cases/compiler/intTypeCheck.ts(127,5): error TS2322: Type 'Object' is not assignable to type 'i3'.
Type 'Object' provides no match for the signature 'new (): any'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature 'new (): any'
tests/cases/compiler/intTypeCheck.ts(129,5): error TS2322: Type 'Base' is not assignable to type 'i3'.
Type 'Base' provides no match for the signature 'new (): any'
tests/cases/compiler/intTypeCheck.ts(131,5): error TS2322: Type '() => void' is not assignable to type 'i3'.
@@ -43,7 +46,8 @@ tests/cases/compiler/intTypeCheck.ts(149,17): error TS2351: Cannot use 'new' wit
tests/cases/compiler/intTypeCheck.ts(154,5): error TS2322: Type '{}' is not assignable to type 'i5'.
Property 'p' is missing in type '{}'.
tests/cases/compiler/intTypeCheck.ts(155,5): error TS2322: Type 'Object' is not assignable to type 'i5'.
Property 'p' is missing in type 'Object'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Property 'p' is missing in type 'Object'.
tests/cases/compiler/intTypeCheck.ts(156,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
tests/cases/compiler/intTypeCheck.ts(157,5): error TS2322: Type 'Base' is not assignable to type 'i5'.
Property 'p' is missing in type 'Base'.
@@ -56,7 +60,8 @@ tests/cases/compiler/intTypeCheck.ts(163,17): error TS2351: Cannot use 'new' wit
tests/cases/compiler/intTypeCheck.ts(168,5): error TS2322: Type '{}' is not assignable to type 'i6'.
Type '{}' provides no match for the signature '(): any'
tests/cases/compiler/intTypeCheck.ts(169,5): error TS2322: Type 'Object' is not assignable to type 'i6'.
Type 'Object' provides no match for the signature '(): any'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature '(): any'
tests/cases/compiler/intTypeCheck.ts(170,17): error TS2350: Only a void function can be called with the 'new' keyword.
tests/cases/compiler/intTypeCheck.ts(171,5): error TS2322: Type 'Base' is not assignable to type 'i6'.
Type 'Base' provides no match for the signature '(): any'
@@ -69,7 +74,8 @@ tests/cases/compiler/intTypeCheck.ts(177,17): error TS2351: Cannot use 'new' wit
tests/cases/compiler/intTypeCheck.ts(182,5): error TS2322: Type '{}' is not assignable to type 'i7'.
Type '{}' provides no match for the signature 'new (): any'
tests/cases/compiler/intTypeCheck.ts(183,5): error TS2322: Type 'Object' is not assignable to type 'i7'.
Type 'Object' provides no match for the signature 'new (): any'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature 'new (): any'
tests/cases/compiler/intTypeCheck.ts(185,17): error TS2352: Type 'Base' cannot be converted to type 'i7'.
Type 'Base' provides no match for the signature 'new (): any'
tests/cases/compiler/intTypeCheck.ts(187,5): error TS2322: Type '() => void' is not assignable to type 'i7'.
@@ -193,7 +199,8 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
var obj2: i1 = new Object();
~~~~
!!! error TS2322: Type 'Object' is not assignable to type 'i1'.
!!! error TS2322: Property 'p' is missing in type 'Object'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Property 'p' is missing in type 'Object'.
var obj3: i1 = new obj0;
~~~~~~~~
!!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -229,7 +236,8 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
var obj13: i2 = new Object();
~~~~~
!!! error TS2322: Type 'Object' is not assignable to type 'i2'.
!!! error TS2322: Type 'Object' provides no match for the signature '(): any'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature '(): any'
var obj14: i2 = new obj11;
~~~~~~~~~
!!! error TS2350: Only a void function can be called with the 'new' keyword.
@@ -262,7 +270,8 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
var obj24: i3 = new Object();
~~~~~
!!! error TS2322: Type 'Object' is not assignable to type 'i3'.
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'
var obj25: i3 = new obj22;
var obj26: i3 = new Base;
~~~~~
@@ -320,7 +329,8 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
var obj46: i5 = new Object();
~~~~~
!!! error TS2322: Type 'Object' is not assignable to type 'i5'.
!!! error TS2322: Property 'p' is missing in type 'Object'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Property 'p' is missing in type 'Object'.
var obj47: i5 = new obj44;
~~~~~~~~~
!!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -356,7 +366,8 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
var obj57: i6 = new Object();
~~~~~
!!! error TS2322: Type 'Object' is not assignable to type 'i6'.
!!! error TS2322: Type 'Object' provides no match for the signature '(): any'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature '(): any'
var obj58: i6 = new obj55;
~~~~~~~~~
!!! error TS2350: Only a void function can be called with the 'new' keyword.
@@ -392,7 +403,8 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
var obj68: i7 = new Object();
~~~~~
!!! error TS2322: Type 'Object' is not assignable to type 'i7'.
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'
var obj69: i7 = new obj66;
var obj70: i7 = <i7>new Base;
~~~~~~~~~~~~

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@@ -3,17 +3,19 @@ tests/cases/conformance/types/members/objectTypeHidingMembersOfObjectAssignmentC
Type '() => number' is not assignable to type '() => string'.
Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/members/objectTypeHidingMembersOfObjectAssignmentCompat2.ts(8,1): error TS2322: Type 'Object' is not assignable to type 'I'.
Types of property 'toString' are incompatible.
Type '() => string' is not assignable to type '() => number'.
Type 'string' is not assignable to type 'number'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Types of property 'toString' are incompatible.
Type '() => string' is not assignable to type '() => number'.
Type 'string' is not assignable to type 'number'.
tests/cases/conformance/types/members/objectTypeHidingMembersOfObjectAssignmentCompat2.ts(14,1): error TS2322: Type 'C' is not assignable to type 'Object'.
Types of property 'toString' are incompatible.
Type '() => number' is not assignable to type '() => string'.
Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/members/objectTypeHidingMembersOfObjectAssignmentCompat2.ts(15,1): error TS2322: Type 'Object' is not assignable to type 'C'.
Types of property 'toString' are incompatible.
Type '() => string' is not assignable to type '() => number'.
Type 'string' is not assignable to type 'number'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Types of property 'toString' are incompatible.
Type '() => string' is not assignable to type '() => number'.
Type 'string' is not assignable to type 'number'.
tests/cases/conformance/types/members/objectTypeHidingMembersOfObjectAssignmentCompat2.ts(20,1): error TS2322: Type '{ toString: () => void; }' is not assignable to type 'Object'.
Types of property 'toString' are incompatible.
Type '() => void' is not assignable to type '() => string'.
@@ -36,9 +38,10 @@ tests/cases/conformance/types/members/objectTypeHidingMembersOfObjectAssignmentC
i = o; // error
~
!!! error TS2322: Type 'Object' is not assignable to type 'I'.
!!! error TS2322: Types of property 'toString' are incompatible.
!!! error TS2322: Type '() => string' is not assignable to type '() => number'.
!!! error TS2322: Type 'string' is not assignable to type 'number'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Types of property 'toString' are incompatible.
!!! error TS2322: Type '() => string' is not assignable to type '() => number'.
!!! error TS2322: Type 'string' is not assignable to type 'number'.
class C {
toString(): number { return 1; }
@@ -53,9 +56,10 @@ tests/cases/conformance/types/members/objectTypeHidingMembersOfObjectAssignmentC
c = o; // error
~
!!! error TS2322: Type 'Object' is not assignable to type 'C'.
!!! error TS2322: Types of property 'toString' are incompatible.
!!! error TS2322: Type '() => string' is not assignable to type '() => number'.
!!! error TS2322: Type 'string' is not assignable to type 'number'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Types of property 'toString' are incompatible.
!!! error TS2322: Type '() => string' is not assignable to type '() => number'.
!!! error TS2322: Type 'string' is not assignable to type 'number'.
var a = {
toString: () => { }

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@@ -1,7 +1,9 @@
tests/cases/conformance/types/members/objectTypeWithCallSignatureHidingMembersOfFunctionAssignmentCompat.ts(8,1): error TS2322: Type 'Object' is not assignable to type 'I'.
Type 'Object' provides no match for the signature '(): void'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature '(): void'
tests/cases/conformance/types/members/objectTypeWithCallSignatureHidingMembersOfFunctionAssignmentCompat.ts(14,1): error TS2322: Type 'Object' is not assignable to type '() => void'.
Type 'Object' provides no match for the signature '(): void'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature '(): void'
==== tests/cases/conformance/types/members/objectTypeWithCallSignatureHidingMembersOfFunctionAssignmentCompat.ts (2 errors) ====
@@ -15,7 +17,8 @@ tests/cases/conformance/types/members/objectTypeWithCallSignatureHidingMembersOf
i = f;
~
!!! error TS2322: Type 'Object' is not assignable to type 'I'.
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'
var a: {
(): void
@@ -24,4 +27,5 @@ tests/cases/conformance/types/members/objectTypeWithCallSignatureHidingMembersOf
a = f;
~
!!! error TS2322: Type 'Object' is not assignable to type '() => void'.
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'

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@@ -1,7 +1,9 @@
tests/cases/conformance/types/members/objectTypeWithConstructSignatureHidingMembersOfFunctionAssignmentCompat.ts(8,1): error TS2322: Type 'Object' is not assignable to type 'I'.
Type 'Object' provides no match for the signature 'new (): any'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature 'new (): any'
tests/cases/conformance/types/members/objectTypeWithConstructSignatureHidingMembersOfFunctionAssignmentCompat.ts(14,1): error TS2322: Type 'Object' is not assignable to type 'new () => any'.
Type 'Object' provides no match for the signature 'new (): any'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature 'new (): any'
==== tests/cases/conformance/types/members/objectTypeWithConstructSignatureHidingMembersOfFunctionAssignmentCompat.ts (2 errors) ====
@@ -15,7 +17,8 @@ tests/cases/conformance/types/members/objectTypeWithConstructSignatureHidingMemb
i = f;
~
!!! error TS2322: Type 'Object' is not assignable to type 'I'.
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'
var a: {
new(): any
@@ -24,4 +27,5 @@ tests/cases/conformance/types/members/objectTypeWithConstructSignatureHidingMemb
a = f;
~
!!! error TS2322: Type 'Object' is not assignable to type 'new () => any'.
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature 'new (): any'

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@@ -1,7 +1,9 @@
tests/cases/conformance/parser/ecmascript5/AutomaticSemicolonInsertion/parserAutomaticSemicolonInsertion1.ts(8,1): error TS2322: Type 'Object' is not assignable to type 'I'.
Type 'Object' provides no match for the signature '(): void'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature '(): void'
tests/cases/conformance/parser/ecmascript5/AutomaticSemicolonInsertion/parserAutomaticSemicolonInsertion1.ts(14,1): error TS2322: Type 'Object' is not assignable to type '() => void'.
Type 'Object' provides no match for the signature '(): void'
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
Type 'Object' provides no match for the signature '(): void'
==== tests/cases/conformance/parser/ecmascript5/AutomaticSemicolonInsertion/parserAutomaticSemicolonInsertion1.ts (2 errors) ====
@@ -15,7 +17,8 @@ tests/cases/conformance/parser/ecmascript5/AutomaticSemicolonInsertion/parserAut
i = o;
~
!!! error TS2322: Type 'Object' is not assignable to type 'I'.
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'
var a: {
(): void
@@ -24,5 +27,6 @@ tests/cases/conformance/parser/ecmascript5/AutomaticSemicolonInsertion/parserAut
a = o;
~
!!! error TS2322: Type 'Object' is not assignable to type '() => void'.
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
!!! error TS2322: Type 'Object' provides no match for the signature '(): void'

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@@ -1,5 +1,6 @@
tests/cases/compiler/typeParametersShouldNotBeEqual.ts(4,5): error TS2322: Type 'U' is not assignable to type 'T'.
tests/cases/compiler/typeParametersShouldNotBeEqual.ts(5,5): error TS2322: Type 'Object' is not assignable to type 'T'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
==== tests/cases/compiler/typeParametersShouldNotBeEqual.ts (2 errors) ====
@@ -12,6 +13,7 @@ tests/cases/compiler/typeParametersShouldNotBeEqual.ts(5,5): error TS2322: Type
x = z; // Error
~
!!! error TS2322: Type 'Object' is not assignable to type 'T'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
z = x; // Ok
}

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@@ -7,6 +7,7 @@ tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(7,5): error TS2322: Type
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(8,5): error TS2322: Type 'U' is not assignable to type 'V'.
Type 'Date' is not assignable to type 'V'.
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(9,5): error TS2322: Type 'Object' is not assignable to type 'T'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
==== tests/cases/compiler/typeParametersShouldNotBeEqual2.ts (6 errors) ====
@@ -34,6 +35,7 @@ tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(9,5): error TS2322: Type
x = zz; // Error
~
!!! error TS2322: Type 'Object' is not assignable to type 'T'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
zz = x; // Ok
}

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@@ -1,6 +1,8 @@
tests/cases/compiler/typeParametersShouldNotBeEqual3.ts(4,5): error TS2322: Type 'U' is not assignable to type 'T'.
Type 'Object' is not assignable to type 'T'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
tests/cases/compiler/typeParametersShouldNotBeEqual3.ts(5,5): error TS2322: Type 'Object' is not assignable to type 'T'.
The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
==== tests/cases/compiler/typeParametersShouldNotBeEqual3.ts (2 errors) ====
@@ -11,9 +13,11 @@ tests/cases/compiler/typeParametersShouldNotBeEqual3.ts(5,5): error TS2322: Type
~
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: Type 'Object' is not assignable to type 'T'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
x = z; // Ok
~
!!! error TS2322: Type 'Object' is not assignable to type 'T'.
!!! error TS2322: The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?
z = x; // Ok
}

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@@ -0,0 +1,8 @@
var x: Object;
var y: RegExp;
y = x;
var a: String = Object.create<Object>("");
var c: String = Object.create<Number>(1);
var w: Error = new Object();