28 lines
992 B
TypeScript
28 lines
992 B
TypeScript
import type {Dependencies, Signature} from '../interfaces/type.js'
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import {$$typeToString} from 'ts-macros'
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export const square =
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<T>(dep: Dependencies<'multiply', T>): Signature<'square', T> =>
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z => dep.multiply(z, z)
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// z => dep.fooBar(z, z) // fails as desired
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// z => dep.multiply(z, 'foo') // still fails as desired
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// make sure ts-macros is running
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function $contains<T>(value: T, ...possible: Array<T>) {
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// repetition which goes over all the elements in the "possible" array
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return +["||", [possible], (item: T) => value === item];
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}
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const searchItem = "needle";
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console.log("In generic arithmetic")
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console.log($contains!(searchItem, "erwin", "tj"));
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// Transpiles to: console.log(false);
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// OK, record the type of square:
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square.reflectedType = $$typeToString!<typeof square>();
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type Expand<T> = T extends unknown ? { [K in keyof T]: T[K] } : never;
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type Out = Expand<Dependencies<'multiply', number>>;
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console.log("Deps type is", $$typeToString!<Out>())
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