calcium-lang/dist/builtin/print.js

Calcium language interpreter

import { None } from "../factory";
import Sym from "../symbol";
import { evaluate } from "../util";
import { KwArg } from "../expression";
import { retrieveValue } from "../util";
/**
 * built-in `print()`
 * @param args values to be output
 * @param env
 * @returns `None`
 */
const print = (args, env) => {
    const result = [];
    let sep = " ";
    let end = "\n";
    for (let a of args) {
        if (a instanceof KwArg) {
            if (a.keyword === "sep") {
                const s = retrieveValue(a.value, env);
                if (typeof s === "string") {
                    sep = s;
                    continue;
                }
                else {
                    throw new TypeError("sep must be a str.");
                }
            }
            else if (a.keyword === "end") {
                const e = retrieveValue(a.value, env);
                if (typeof e === "string") {
                    end = e;
                    continue;
                }
                else {
                    throw new TypeError("end must be a str.");
                }
            }
        }
        const evaluated = evaluate(a, env);
        result.push(Reflect.get(evaluated, Sym.description));
    }
    if (env.funcToOutput) {
        env.funcToOutput(result.join(sep) + end);
    }
    return None;
};
export default print;
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