thi-ng/umbrella

import type { Parser } from "../api.js";
import { discard } from "../xform/discard.js";

export const seq =
    <T>(parsers: Parser<T>[], id = "seq"): Parser<T> =>
    (ctx) => {
        if (ctx.done) return false;
        ctx.start(id);
        for (let i = 0, n = parsers.length; i < n; i++) {
            if (!parsers[i](ctx)) {
                return ctx.discard();
            }
        }
        return ctx.end();
    };

export const seqD = <T>(parsers: Parser<T>[]) => discard(seq(parsers));