71 lines
1.7 KiB
TypeScript
71 lines
1.7 KiB
TypeScript
//// [callSignatureAssignabilityInInheritance.ts]
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module CallSignature {
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interface Base { // T
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// M's
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(x: number): void;
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(x: number, y: number): void;
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}
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// S's
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interface I extends Base {
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// N's
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(x: number): number; // ok because base returns void
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(x: number, y: number): boolean; // ok because base returns void
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<T>(x: T): string; // ok because base returns void
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}
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interface Base2 { // T
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// M's
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(x: number): number;
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}
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// S's
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interface I2 extends Base2 {
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// N's
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(x: number): string; // error because base returns non-void;
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}
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// S's
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interface I3 extends Base2 {
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// N's
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<T>(x: T): string; // ok, adds a new call signature
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}
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}
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module MemberWithCallSignature {
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interface Base { // T
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// M's
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a: (x: number) => void;
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a2: (x: number, y: number) => void;
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a3: <T>(x: T) => void;
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}
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// S's
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interface I extends Base {
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// N's
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a: (x: number) => number; // ok because base returns void
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a2: (x: number, y: number) => boolean; // ok because base returns void
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a3: <T>(x: T) => string; // ok because base returns void
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}
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interface Base2 { // T
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// M's
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a: (x: number) => number;
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a2: <T>(x: T) => T;
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}
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// S's
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interface I2 extends Base2 {
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// N's
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a: (x: number) => string; // error because base returns non-void;
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}
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// S's
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interface I3 extends Base2 {
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// N's
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a2: <T>(x: T) => string; // error because base returns non-void;
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}
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}
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//// [callSignatureAssignabilityInInheritance.js]
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