@typespec/compiler/dist/src/typekit/utils.js

TypeSpec compiler and standard library

import { createRekeyableMap } from "../utils/misc.js";
/**
 * Creates a shallow copy of a rekeyable map.
 *
 * @experimental
 */
export function copyMap(map) {
    return createRekeyableMap(map.entries());
}
/**
 * Utility function for converting a list of decorators and arguments into structure decorator applications that are
 * compatible with the TypeSpec type graph.
 *
 * Note: Not all JavaScript values can be converted faithfully to TypeSpec values. This function will attempt to convert
 * the value to a literal TypeSpec value if it is a primitive value, otherwise it will be left as a JavaScript value.
 * The `jsValue` property of the argument will always contain the original JavaScript value passed to the decorator.
 *
 * @param typekit - The Typekit instance to use for creating types and values.
 * @param decorators - The list of decorators and arguments to apply.
 *
 * @see {@link DecoratorArgs}
 *
 * @experimental
 */
export function decoratorApplication(typekit, decorators) {
    return (decorators?.map((arg) => {
        const [decorator, args] = Array.isArray(arg) ? [arg[0], arg.slice(1)] : [arg, []];
        return {
            decorator,
            args: args.map((rawValue) => ({
                value: typeof rawValue === "object" && rawValue !== null
                    ? rawValue
                    : typekit.literal.create(rawValue),
                jsValue: rawValue,
            })),
        };
    }) ?? []);
}
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