parjs/dist/internal/parsers/int.js

Library for building parsers using combinators.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.int = void 0;
const errors_1 = require("../../errors");
const utils_1 = require("../../utils");
const parser_1 = require("../parser");
const result_1 = require("../result");
const numeric_helpers_1 = require("./numeric-helpers");
const defaultOptions = {
    allowSign: true,
    base: 10
};
class Int extends parser_1.ParjserBase {
    constructor(options, expecting) {
        super();
        this.options = options;
        this.expecting = expecting;
        this.type = "int";
    }
    _apply(ps) {
        const { allowSign, base } = this.options;
        let { position } = ps;
        const { input } = ps;
        const initPos = ps.position;
        let sign = allowSign ? numeric_helpers_1.NumericHelpers.parseSign(ps) : 0;
        let parsedSign = false;
        if (sign !== 0) {
            parsedSign = true;
        }
        else {
            sign = 1;
        }
        position = ps.position;
        numeric_helpers_1.NumericHelpers.parseDigitsInBase(ps, base);
        const value = parseInt(input.substring(initPos, ps.position), base);
        if (ps.position === position) {
            ps.kind = parsedSign ? result_1.ResultKind.HardFail : result_1.ResultKind.SoftFail;
        }
        else {
            ps.value = value;
            ps.kind = result_1.ResultKind.Ok;
        }
    }
}
/**
 * Returns a parser that will parse a single integer, with the options given by `options`.
 *
 * @param pOptions A set of options for parsing integers.
 */
function int(pOptions) {
    const options = (0, utils_1.defaults)(pOptions, defaultOptions);
    if (options.base > 36) {
        throw new errors_1.ParserDefinitionError("int", "invalid base");
    }
    const expecting = `expecting a ${options.allowSign ? "signed" : "unsigned"} integer in base ${options.base}`;
    return new Int(options, expecting);
}
exports.int = int;
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