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27 lines
427 B
TypeScript
27 lines
427 B
TypeScript
interface Number {
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doStuff(): string;
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}
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interface NotNumber {
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toString(radix?: number): string;
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toFixed(fractionDigits?: number): string;
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toExponential(fractionDigits?: number): string;
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toPrecision(precision?: number): string;
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valueOf(): number;
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doStuff(): string;
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}
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var x = 1;
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var a: Number;
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var b: NotNumber;
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a = x;
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a = b;
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b = a;
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b = x;
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x = a; // expected error
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x = b; // expected error
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