44 lines
1.7 KiB
Plaintext
44 lines
1.7 KiB
Plaintext
==== tests/cases/compiler/widenedTypes.ts (8 errors) ====
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null instanceof (() => { });
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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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({}) instanceof null; // Ok because null is a subtype of function
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null in {};
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~~~~
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!!! The left-hand side of an 'in' expression must be of types 'any', 'string' or 'number'.
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"" in null;
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~~~~
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!!! The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter
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for (var a in null) { }
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~~~~
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!!! The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter.
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var t = [3, (3, null)];
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t[3] = "";
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~~~~
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!!! Type 'string' is not assignable to type 'number'.
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var x: typeof undefined = 3;
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x = 3;
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var y;
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var u = [3, (y = null)];
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u[3] = "";
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~~~~
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!!! Type 'string' is not assignable to type 'number'.
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var ob: { x: typeof undefined } = { x: "" };
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// Highlights the difference between array literals and object literals
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var arr: string[] = [3, null]; // not assignable because null is not widened. BCT is {}
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~~~
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!!! Type 'number[]' is not assignable to type 'string[]':
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!!! Type 'number' is not assignable to type 'string'.
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var obj: { [x: string]: string; } = { x: 3, y: null }; // assignable because null is widened, and therefore BCT is any
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~~~
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!!! Type '{ [x: string]: number; x: number; y: null; }' is not assignable to type '{ [x: string]: string; }':
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!!! Index signatures are incompatible:
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!!! Type 'number' is not assignable to type 'string'. |