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tests/cases/compiler/optionalPropertiesTest.ts(14,1): error TS2741: Property 'id' is missing in type '{ name: string; }' but required in type 'IFoo'.
tests/cases/compiler/optionalPropertiesTest.ts(25,5): error TS2741: Property 'M' is missing in type '{}' but required in type 'i1'.
tests/cases/compiler/optionalPropertiesTest.ts(26,5): error TS2741: Property 'M' is missing in type '{}' but required in type 'i3'.
tests/cases/compiler/optionalPropertiesTest.ts(40,1): error TS2322: Type 'i2' is not assignable to type 'i1'.
Property 'M' is optional in type 'i2' but required in type 'i1'.
==== tests/cases/compiler/optionalPropertiesTest.ts (4 errors) ====
var x: {p1:number; p2?:string; p3?:{():number;};};
interface IFoo
{
id: number;
name?: string;
print?(): void;
}
var foo: IFoo;
foo = { id: 1234 }; // Ok
foo = { id: 1234, name: "test" }; // Ok
foo = { name: "test" }; // Error, id missing
~~~
!!! error TS2741: Property 'id' is missing in type '{ name: string; }' but required in type 'IFoo'.
!!! related TS2728 tests/cases/compiler/optionalPropertiesTest.ts:5:5: 'id' is declared here.
foo = {id: 1234, print:()=>{}} // Ok
var s = foo.name || "default";
if (foo.print !== undefined) foo.print();
interface i1 { M: () => void; };
interface i2 { M?: () => void; };
interface i3 { M: number; };
interface i4 { M?: number; };
var test1: i1 = {};
~~~~~
!!! error TS2741: Property 'M' is missing in type '{}' but required in type 'i1'.
!!! related TS2728 tests/cases/compiler/optionalPropertiesTest.ts:20:16: 'M' is declared here.
var test2: i3 = {};
~~~~~
!!! error TS2741: Property 'M' is missing in type '{}' but required in type 'i3'.
!!! related TS2728 tests/cases/compiler/optionalPropertiesTest.ts:22:16: 'M' is declared here.
var test3: i2 = {};
var test4: i4 = {};
var test5: i1 = { M: function () { } };
var test6: i3 = { M: 5 };
var test7: i2 = { M: function () { } };
test7 = {};
var test8: i4 = { M: 5 }
test8 = {};
var test9_1: i2;
var test9_2: i1;
test9_1 = test9_2;
var test10_1: i1;
var test10_2: i2;
test10_1 = test10_2;
~~~~~~~~
!!! error TS2322: Type 'i2' is not assignable to type 'i1'.
!!! error TS2322: Property 'M' is optional in type 'i2' but required in type 'i1'.
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