Created
June 13, 2018 03:42
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Typescript: Exclusive Or properties
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type ExcludeXORIncludeXORNeither<T extends Serializer<T>> = | |
| { exclude: object; include?: never; } | |
| { exclude?: never; include: object; } | |
| { exclude?: never; include?: never; }; | |
abstract class Serializer<T extends Serializer<T> & ExcludeXORIncludeXORNeither<T>> { | |
exclude?: object; | |
include?: object; | |
} | |
class FooSerializer extends Serializer<FooSerializer> { | |
// error | |
exclude = { | |
foo: true, | |
} | |
include = { | |
bar: true, | |
} | |
} | |
class BazSerializer extends Serializer<BazSerializer> { | |
// ok | |
exclude = { | |
foo: true, | |
} | |
} | |
class BarSerializer extends Serializer<BarSerializer> { | |
// ok | |
include = { | |
bar: true, | |
} | |
} |
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