2022-04-28 14:38:41 +01:00

28 lines
1.6 KiB
JavaScript

/*
evaluate.mjs - <short description TODO>
Copyright (C) 2022 Strudel contributors - see <https://github.com/tidalcycles/strudel/blob/main/packages/eval/evaluate.mjs>
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import shapeshifter from './shapeshifter.mjs';
import * as strudel from '@strudel.cycles/core';
const { isPattern } = strudel;
export const extend = (...args) => {
// TODO: find a way to make args available to eval without adding it to global scope...
// sadly, "with" does not work in strict mode
Object.assign(globalThis, ...args);
};
export const evaluate = async (code) => {
const shapeshifted = shapeshifter(code); // transform syntactically correct js code to semantically usable code
let evaluated = await eval(shapeshifted);
if (!isPattern(evaluated)) {
console.log('evaluated', evaluated);
const message = `got "${typeof evaluated}" instead of pattern`;
throw new Error(message + (typeof evaluated === 'function' ? ', did you forget to call a function?' : '.'));
}
return { mode: 'javascript', pattern: evaluated };
};