calcium-lang/dist/factory/none.js

Calcium language interpreter

import * as Err from "../error";
import { default as Sym } from "../symbol";
/**
 * represent `None` object
 */
const None = new Proxy({}, {
    get(target, property, receiver) {
        if (property === Sym.description)
            return "None";
        else if (property === Sym.evaluate)
            return (env) => None;
        else if (property === Sym.value)
            return null;
        else if (property === Sym.class)
            return "None";
        else
            throw new Err.AttributeNotFound(property.toString());
    },
});
export default None;
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