32 lines
943 B
Plaintext
32 lines
943 B
Plaintext
==== tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithMultipleBaseTypes2.ts (1 errors) ====
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interface Base {
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x: {
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a?: string; b: string;
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}
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}
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interface Base2 {
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x: {
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b: string; c?: number;
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}
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}
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interface Derived extends Base, Base2 {
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x: { b: string }
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}
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interface Derived2 extends Base, Base2 { // error
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~~~~~~~~
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!!! Interface 'Derived2' incorrectly extends interface 'Base':
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!!! Types of property 'x' are incompatible:
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!!! Type '{ a: number; b: string; }' is not assignable to type '{ a?: string; b: string; }':
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!!! Types of property 'a' are incompatible:
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!!! Type 'number' is not assignable to type 'string'.
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x: { a: number; b: string }
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}
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interface Derived3 extends Base, Base2 {
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x: { a: string; b: string }
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}
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