succulent/build/types/enum.js

Powerful and easy runtime type checking

import { Schema } from "../schema";
function isEnumMemberName(x, enumObject) {
    // @ts-expect-error - This is some real fun voodoo :)
    // eslint-disable-next-line
    return x in enumObject && typeof enumObject[enumObject[x]] !== "number";
}
function enumKeys(enumObject) {
    return Object.keys(enumObject).filter((key) => isEnumMemberName(key, enumObject));
}
export function $enum(enumObject, options = {}) {
    const keys = enumKeys(enumObject);
    const values = new Set(keys.map((key) => enumObject[key]));
    // eslint-disable-next-line
    return new Schema((x) => values.has(x), {
        displayName: options.displayName ?? `enum { ${keys.join(", ")} }`,
        *iter() {
            yield* values;
        },
    });
}
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