35 lines
1.4 KiB
Plaintext
35 lines
1.4 KiB
Plaintext
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==== tests/cases/compiler/instanceofOperator.ts (6 errors) ====
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// Spec:
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// The instanceof operator requires the left operand to be of type Any or an object type, and the right
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// operand to be of type Any or a subtype of the ‘Function’ interface type. The result is always of the
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// Boolean primitive type.
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class Object { }
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~~~~~~
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!!! Duplicate identifier 'Object'.
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var obj: Object;
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4 instanceof null;
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~
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!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
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// Error and should be error
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obj instanceof 4;
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~
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!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
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Object instanceof obj;
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~~~
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!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
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// Error on left hand side
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null instanceof null;
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~~~~
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!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
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obj instanceof Object;
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undefined instanceof undefined;
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~~~~~~~~~
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!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
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