34 lines
750 B
Plaintext
34 lines
750 B
Plaintext
==== tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties.ts (4 errors) ====
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// Basic uses of optional properties
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var a: {
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x?: number; // ok
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}
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interface I {
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x?: number; // ok
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}
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class C {
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x?: number; // error
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~
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!!! error TS1112: A class member cannot be declared optional.
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}
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interface I2<T> {
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x?: T; // ok
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}
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class C2<T> {
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x?: T; // error
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~
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!!! error TS1112: A class member cannot be declared optional.
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}
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var b = {
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x?: 1 // error
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~
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!!! error TS1005: ':' expected.
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~
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!!! error TS1109: Expression expected.
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} |