calcium-lang/dist/expression/unaryOperation.js

Calcium language interpreter

import * as Kw from "../keyword";
import { retrieveValue } from "../util";
import createBool from "../factory/bool";
import { default as Sym } from "../symbol";
/**
 * use a unary operator and calculate
 */
export default class UnaryOperation {
    constructor(operator, operand) {
        this.operator = operator;
        this.operand = operand;
    }
    [Sym.evaluate](env) {
        const value = retrieveValue(this.operand, env);
        return UnaryOperation.table[this.operator](value);
    }
}
UnaryOperation.table = {
    [Kw.UnaryOperator.Not]: (operand) => {
        return createBool(!operand);
    },
};
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