parjs/internal/parsers/int.js

A parser-combinator library for JavaScript.

"use strict";
/**
 * @module parjs
 */
/** */
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const numeric_helpers_1 = require("./numeric-helpers");
const result_1 = require("../result");
const errors_1 = require("../../errors");
const parser_1 = require("../parser");
const defaults_1 = __importDefault(require("lodash/defaults"));
const defaultOptions = {
    allowSign: true,
    base: 10
};
/**
 * 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) {
    let options = defaults_1.default(pOptions, defaultOptions);
    if (options.base > 36) {
        throw new errors_1.ParserDefinitionError("int", "invalid base");
    }
    let expecting = `expecting a ${options.allowSign ? "signed" : "unsigned"} integer in base ${options.base}`;
    return new class Int extends parser_1.ParjserBase {
        constructor() {
            super(...arguments);
            this.type = "int";
            this.displayName = "int";
            this.expecting = expecting;
        }
        _apply(ps) {
            let { allowSign, base } = options;
            let { position, input } = ps;
            let 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);
            let 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;
            }
        }
    }();
}
exports.int = int;

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