parser-combinator/build/lib/parsec/numbers-bundle.js

Parser combinators

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _charsBundle = require('./chars-bundle');

var _charsBundle2 = _interopRequireDefault(_charsBundle);

var _flowBundle = require('./flow-bundle');

var _flowBundle2 = _interopRequireDefault(_flowBundle);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// unit -> Parser number char
/*
 * Parsec
 * https://github.com/d-plaindoux/parsec
 *
 * Copyright (c) 2016 Didier Plaindoux
 * Licensed under the LGPL2 license.
 */

function numberLiteral() {
    // [-+]?\d+([.]\d+)?([eE][+-]?\d+)?
    var join = function join(r) {
        return r.join('');
    },
        joinOrEmpty = function joinOrEmpty(r) {
        return r.map(join).orElse('');
    },
        digits = digit().rep().map(join),
        integer = _charsBundle2.default.charIn('+-').opt().then(digits).map(function (r) {
        return r[0].orElse('') + r[1];
    }),
        float = integer.then(_charsBundle2.default.char('.').then(digits).opt().map(joinOrEmpty)).then(_charsBundle2.default.charIn('eE').then(integer).opt().map(joinOrEmpty)).map(function (r) {
        return r[0] + r[1] + r[2];
    });

    return float.map(function (r) {
        return parseFloat(r, 10);
    });
}

// unit -> Parser char char
function digit() {
    return _flowBundle2.default.satisfy(function (v) {
        return '0' <= v && v <= '9';
    });
}

function digits() {
    return digit().rep().map(function (v) {
        return v.join('');
    });
}

function integer() {
    // [-+]?\d+([.]\d+)?([eE][+-]?\d+)?
    var join = function join(r) {
        return r.join('');
    },
        digits = digit().rep().map(join),
        integer = _charsBundle2.default.charIn('+-').opt().then(digits).map(function (r) {
        return r[0].orElse('') + r[1];
    });

    return integer.map(function (i) {
        return parseInt(i, 10);
    });
}

exports.default = {
    numberLiteral: numberLiteral(),
    digit: digit(),
    digits: digits(),
    integer: integer()
};
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