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This commit is contained in:
Joeri Exelmans 2025-06-05 10:10:33 +02:00
parent 5b13fbb047
commit 62f85302fd
4 changed files with 1 additions and 52 deletions
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52
examples/enum.js
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import { makeCompareFn } from "../lib/compare/dynamic.js";
import { Int, Unit } from "../lib/primitives/primitive_types.js";
import { unit } from "../lib/primitives/unit.js";
import { makeConstructors, makeMatchFn } from "../lib/structures/enum.js";
import { enumType } from "../lib/structures/enum.types.js";
import { newProduct } from "../lib/structures/product.js";
import { lsType } from "../lib/structures/type_constructors.types.js";
import { prettyT } from "../lib/util/pretty.js";
Error.stackTraceLimit = Infinity;
const variants = [
newProduct("price")(_ => Int),
newProduct("prices")(_ => lsType(_ => Int)),
newProduct("not_found")(_ => Unit),
];
const structuralType = enumType(variants);
console.log("observe the type that was generated:");
console.log(" ", prettyT(structuralType));
const [newPrice, newPrices, newNotFound] = makeConstructors(variants);
const price = newPrice(10);
const prices = newPrices([20, 30]);
const notFound = newNotFound(unit);
console.log("observe the encoding of different variant instances:");
console.log(" ", price);
console.log(" ", prices);
console.log(" ", notFound);
const myEnumToString = x => makeMatchFn(variants)(x)
(price => `Price: ${price}`)
(prices => `Prices: ${prices}`)
(() => "Not found!");
console.log("observe the generated match function in action:");
console.log(" ", myEnumToString(price));
console.log(" ", myEnumToString(prices));
console.log(" ", myEnumToString(notFound));
const compareMyEnum = makeCompareFn(structuralType);
console.log("observe the generated compare function in action:");
console.log(" should be smaller ->", compareMyEnum(price)(prices));
console.log(" should be bigger ->", compareMyEnum(prices)(price));
console.log(" should be bigger ->", compareMyEnum(notFound)(price));
console.log(" should be equal ->", compareMyEnum(prices)(prices));
console.log(" should be smaller ->", compareMyEnum(newPrice(5))(newPrice(6)));
console.log(" should be bigger ->", compareMyEnum(newPrices([5, 6]))(newPrices([5, 5])));

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snippets/README.txt Normal file
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In this directory, just some scripts I wrote to get my hands dirty.

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examples/rbtree.js → snippets/rbtree.js
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examples/versioning.js → snippets/versioning.js
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