parjs/dist/internal/parsers/string-len.js

Library for building parsers using combinators.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.stringLen = void 0;
const parser_1 = require("../parser");
const result_1 = require("../result");
class StringLen extends parser_1.ParjserBase {
    constructor(length) {
        super();
        this.length = length;
        this.type = "stringLen";
        this.expecting = `expecting ${this.length} characters`;
    }
    _apply(ps) {
        const { position, input } = ps;
        const length = this.length;
        if (input.length < position + length) {
            ps.kind = result_1.ResultKind.SoftFail;
            return;
        }
        ps.position += length;
        ps.value = input.substring(position, position + length);
        ps.kind = result_1.ResultKind.Ok;
    }
}
/**
 * Returns a parser that parses exactly `length` characters and yields the text that was parsed.
 *
 * @param length The number of characters to parse.
 */
function stringLen(length) {
    return new StringLen(length);
}
exports.stringLen = stringLen;
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