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tests/cases/compiler/optionalPropertiesInClasses.ts(10,7): error TS2420: Class 'C2' incorrectly implements interface 'ifoo'.
Property 'y' is missing in type 'C2' but required in type 'ifoo'.
==== tests/cases/compiler/optionalPropertiesInClasses.ts (1 errors) ====
interface ifoo {
x?:number;
y:number;
}
class C1 implements ifoo {
public y:number;
}
class C2 implements ifoo { // ERROR - still need 'y'
~~
!!! error TS2420: Class 'C2' incorrectly implements interface 'ifoo'.
!!! error TS2420: Property 'y' is missing in type 'C2' but required in type 'ifoo'.
!!! related TS2728 tests/cases/compiler/optionalPropertiesInClasses.ts:3:2: 'y' is declared here.
public x:number;
}
class C3 implements ifoo {
public x:number;
public y:number;
}
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