58 lines
2 KiB
TypeScript
58 lines
2 KiB
TypeScript
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//// [mixinAbstractClasses.2.ts]
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interface Mixin {
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mixinMethod(): void;
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}
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function Mixin<TBaseClass extends abstract new (...args: any) => any>(baseClass: TBaseClass): TBaseClass & (abstract new (...args: any) => Mixin) {
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// error expected: A mixin class that extends from a type variable containing an abstract construct signature must also be declared 'abstract'.
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class MixinClass extends baseClass implements Mixin {
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mixinMethod() {
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}
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}
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return MixinClass;
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}
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abstract class AbstractBase {
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abstract abstractBaseMethod(): void;
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}
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const MixedBase = Mixin(AbstractBase);
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// error expected: Non-abstract class 'DerivedFromAbstract' does not implement inherited abstract member 'abstractBaseMethod' from class 'AbstractBase & Mixin'.
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class DerivedFromAbstract extends MixedBase {
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}
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// error expected: Cannot create an instance of an abstract class.
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new MixedBase();
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//// [mixinAbstractClasses.2.js]
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function Mixin(baseClass) {
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// error expected: A mixin class that extends from a type variable containing an abstract construct signature must also be declared 'abstract'.
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class MixinClass extends baseClass {
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mixinMethod() {
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}
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}
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return MixinClass;
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}
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class AbstractBase {
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}
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const MixedBase = Mixin(AbstractBase);
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// error expected: Non-abstract class 'DerivedFromAbstract' does not implement inherited abstract member 'abstractBaseMethod' from class 'AbstractBase & Mixin'.
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class DerivedFromAbstract extends MixedBase {
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}
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// error expected: Cannot create an instance of an abstract class.
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new MixedBase();
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//// [mixinAbstractClasses.2.d.ts]
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interface Mixin {
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mixinMethod(): void;
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}
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declare function Mixin<TBaseClass extends abstract new (...args: any) => any>(baseClass: TBaseClass): TBaseClass & (abstract new (...args: any) => Mixin);
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declare abstract class AbstractBase {
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abstract abstractBaseMethod(): void;
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}
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declare const MixedBase: typeof AbstractBase & (abstract new (...args: any) => Mixin);
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declare class DerivedFromAbstract extends MixedBase {
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}
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