44 строки
1.3 KiB
TypeScript
44 строки
1.3 KiB
TypeScript
declare function isString(value: unknown): value is string;
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declare function isArrayOfStrings(value: unknown): value is string[];
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const assert: (value: unknown) => asserts value = value => {}
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declare function assertIsString(value: unknown): asserts value is string;
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declare function assertIsArrayOfStrings(value: unknown): asserts value is string[];
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declare function assertDefined<T>(value: T): asserts value is NonNullable<T>;
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namespace Debug {
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export declare function assert(value: unknown, message?: string): asserts value;
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export declare function assertDefined<T>(value: T): asserts value is NonNullable<T>;
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}
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class Test {
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assert(value: unknown): asserts value {
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if (value) return;
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throw new Error();
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}
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isTest2(): this is Test2 {
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return this instanceof Test2;
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}
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assertIsTest2(): asserts this is Test2 {
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if (this instanceof Test2) return;
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throw new Error();
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}
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assertThis(): asserts this {
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if (!this) return;
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throw new Error();
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}
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bar() {
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this.assertThis();
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this;
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}
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foo(x: unknown) {
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this.assert(typeof x === "string");
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x.length;
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if (this.isTest2()) {
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this.z;
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}
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this.assertIsTest2();
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this.z;
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}
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} |