50 lines
1.9 KiB
JavaScript
50 lines
1.9 KiB
JavaScript
import { makeCompareFn } from "../lib/compare/registry.js";
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import { Int, Unit } from "../lib/primitives/primitive_types.js";
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import { unit } from "../lib/primitives/unit.js";
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import { makeConstructors, makeMatchFn } from "../lib/structures/enum.js";
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import { enumType } from "../lib/structures/enum.types.js";
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import { newProduct } from "../lib/structures/product.js";
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import { lsType } from "../lib/structures/type_constructors.js";
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import { prettyT } from "../lib/util/pretty.js";
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const variants = [
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newProduct("price")(Int),
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newProduct("prices")(lsType(_ => Int)),
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newProduct("not_found")(Unit),
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];
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const myEnumType = enumType(variants);
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console.log("observe the type that was generated:");
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console.log(" ", prettyT(myEnumType));
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const [newPrice, newPrices, newNotFound] = makeConstructors(variants);
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const price = newPrice(10);
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const prices = newPrices([20, 30]);
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const notFound = newNotFound(unit);
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console.log("observe the encoding of different variant instances:");
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console.log(" ", price);
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console.log(" ", prices);
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console.log(" ", notFound);
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const myEnumToString = x => makeMatchFn(variants)(x)
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(price => `Price: ${price}`)
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(prices => `Prices: ${prices}`)
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(() => "Not found!");
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console.log("observe the generated match function in action:");
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console.log(" ", myEnumToString(price));
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console.log(" ", myEnumToString(prices));
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console.log(" ", myEnumToString(notFound));
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const compareMyEnum = makeCompareFn(myEnumType);
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console.log("observe the generated compare function in action:");
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console.log(" should be smaller ->", compareMyEnum(price)(prices));
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console.log(" should be bigger ->", compareMyEnum(prices)(price));
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console.log(" should be bigger ->", compareMyEnum(notFound)(price));
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console.log(" should be equal ->", compareMyEnum(prices)(prices));
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console.log(" should be smaller ->", compareMyEnum(newPrice(5))(newPrice(6)));
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console.log(" should be bigger ->", compareMyEnum(newPrices([5, 6]))(newPrices([5, 5])));
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