rollup/dist/shared/rollup.js

Next-generation ES module bundler

/*
  @license
	Rollup.js v2.34.0
	Sun, 29 Nov 2020 05:54:58 GMT - commit 9949fe60438015ce5aab5b158a90a38f2475f87c


	https://github.com/rollup/rollup

	Released under the MIT License.
*/
'use strict';

var fs = require('fs');
var sysPath = require('path');
var crypto = require('crypto');
var require$$0$1 = require('events');

function _interopNamespaceDefaultOnly(e) {
  return {__proto__: null, 'default': e};
}

var version = "2.34.0";

function ensureArray(items) {
    if (Array.isArray(items)) {
        return items.filter(Boolean);
    }
    if (items) {
        return [items];
    }
    return [];
}

const defaultOnWarn = warning => console.warn(warning.message || warning);
function warnUnknownOptions(passedOptions, validOptions, optionType, warn, ignoredKeys = /$./) {
    const validOptionSet = new Set(validOptions);
    const unknownOptions = Object.keys(passedOptions).filter(key => !(validOptionSet.has(key) || ignoredKeys.test(key)));
    if (unknownOptions.length > 0) {
        warn({
            code: 'UNKNOWN_OPTION',
            message: `Unknown ${optionType}: ${unknownOptions.join(', ')}. Allowed options: ${[
                ...validOptionSet
            ]
                .sort()
                .join(', ')}`
        });
    }
}

const absolutePath = /^(?:\/|(?:[A-Za-z]:)?[\\|/])/;
const relativePath = /^\.?\.\//;
function isAbsolute(path) {
    return absolutePath.test(path);
}
function isRelative(path) {
    return relativePath.test(path);
}
function normalize(path) {
    if (path.indexOf('\\') == -1)
        return path;
    return path.replace(/\\/g, '/');
}

function sanitizeFileName(name) {
    return name.replace(/[\0?*]/g, '_');
}

function getAliasName(id) {
    const base = sysPath.basename(id);
    return base.substr(0, base.length - sysPath.extname(id).length);
}
function relativeId(id) {
    if (typeof process === 'undefined' || !isAbsolute(id))
        return id;
    return sysPath.relative(process.cwd(), id);
}
function isPlainPathFragment(name) {
    // not starting with "/", "./", "../"
    return (name[0] !== '/' &&
        !(name[0] === '.' && (name[1] === '/' || name[1] === '.')) &&
        sanitizeFileName(name) === name &&
        !isAbsolute(name));
}

let fsEvents;
let fsEventsImportError;
function loadFsEvents() {
    return Promise.resolve().then(function () { return /*#__PURE__*/_interopNamespaceDefaultOnly(require('fsevents')); })
        .then(namespace => {
        fsEvents = namespace.default;
    })
        .catch(err => {
        fsEventsImportError = err;
    });
}
// A call to this function will be injected into the chokidar code
function getFsEvents() {
    if (fsEventsImportError)
        throw fsEventsImportError;
    return fsEvents;
}

var fseventsImporter = {
  __proto__: null,
  loadFsEvents: loadFsEvents,
  getFsEvents: getFsEvents
};

var charToInteger = {};
var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
for (var i = 0; i < chars.length; i++) {
    charToInteger[chars.charCodeAt(i)] = i;
}
function decode(mappings) {
    var decoded = [];
    var line = [];
    var segment = [
        0,
        0,
        0,
        0,
        0,
    ];
    var j = 0;
    for (var i = 0, shift = 0, value = 0; i < mappings.length; i++) {
        var c = mappings.charCodeAt(i);
        if (c === 44) { // ","
            segmentify(line, segment, j);
            j = 0;
        }
        else if (c === 59) { // ";"
            segmentify(line, segment, j);
            j = 0;
            decoded.push(line);
            line = [];
            segment[0] = 0;
        }
        else {
            var integer = charToInteger[c];
            if (integer === undefined) {
                throw new Error('Invalid character (' + String.fromCharCode(c) + ')');
            }
            var hasContinuationBit = integer & 32;
            integer &= 31;
            value += integer << shift;
            if (hasContinuationBit) {
                shift += 5;
            }
            else {
                var shouldNegate = value & 1;
                value >>>= 1;
                if (shouldNegate) {
                    value = value === 0 ? -0x80000000 : -value;
                }
                segment[j] += value;
                j++;
                value = shift = 0; // reset
            }
        }
    }
    segmentify(line, segment, j);
    decoded.push(line);
    return decoded;
}
function segmentify(line, segment, j) {
    // This looks ugly, but we're creating specialized arrays with a specific
    // length. This is much faster than creating a new array (which v8 expands to
    // a capacity of 17 after pushing the first item), or slicing out a subarray
    // (which is slow). Length 4 is assumed to be the most frequent, followed by
    // length 5 (since not everything will have an associated name), followed by
    // length 1 (it's probably rare for a source substring to not have an
    // associated segment data).
    if (j === 4)
        line.push([segment[0], segment[1], segment[2], segment[3]]);
    else if (j === 5)
        line.push([segment[0], segment[1], segment[2], segment[3], segment[4]]);
    else if (j === 1)
        line.push([segment[0]]);
}
function encode(decoded) {
    var sourceFileIndex = 0; // second field
    var sourceCodeLine = 0; // third field
    var sourceCodeColumn = 0; // fourth field
    var nameIndex = 0; // fifth field
    var mappings = '';
    for (var i = 0; i < decoded.length; i++) {
        var line = decoded[i];
        if (i > 0)
            mappings += ';';
        if (line.length === 0)
            continue;
        var generatedCodeColumn = 0; // first field
        var lineMappings = [];
        for (var _i = 0, line_1 = line; _i < line_1.length; _i++) {
            var segment = line_1[_i];
            var segmentMappings = encodeInteger(segment[0] - generatedCodeColumn);
            generatedCodeColumn = segment[0];
            if (segment.length > 1) {
                segmentMappings +=
                    encodeInteger(segment[1] - sourceFileIndex) +
                        encodeInteger(segment[2] - sourceCodeLine) +
                        encodeInteger(segment[3] - sourceCodeColumn);
                sourceFileIndex = segment[1];
                sourceCodeLine = segment[2];
                sourceCodeColumn = segment[3];
            }
            if (segment.length === 5) {
                segmentMappings += encodeInteger(segment[4] - nameIndex);
                nameIndex = segment[4];
            }
            lineMappings.push(segmentMappings);
        }
        mappings += lineMappings.join(',');
    }
    return mappings;
}
function encodeInteger(num) {
    var result = '';
    num = num < 0 ? (-num << 1) | 1 : num << 1;
    do {
        var clamped = num & 31;
        num >>>= 5;
        if (num > 0) {
            clamped |= 32;
        }
        result += chars[clamped];
    } while (num > 0);
    return result;
}

var BitSet = function BitSet(arg) {
	this.bits = arg instanceof BitSet ? arg.bits.slice() : [];
};

BitSet.prototype.add = function add (n) {
	this.bits[n >> 5] |= 1 << (n & 31);
};

BitSet.prototype.has = function has (n) {
	return !!(this.bits[n >> 5] & (1 << (n & 31)));
};

var Chunk = function Chunk(start, end, content) {
	this.start = start;
	this.end = end;
	this.original = content;

	this.intro = '';
	this.outro = '';

	this.content = content;
	this.storeName = false;
	this.edited = false;

	// we make these non-enumerable, for sanity while debugging
	Object.defineProperties(this, {
		previous: { writable: true, value: null },
		next:     { writable: true, value: null }
	});
};

Chunk.prototype.appendLeft = function appendLeft (content) {
	this.outro += content;
};

Chunk.prototype.appendRight = function appendRight (content) {
	this.intro = this.intro + content;
};

Chunk.prototype.clone = function clone () {
	var chunk = new Chunk(this.start, this.end, this.original);

	chunk.intro = this.intro;
	chunk.outro = this.outro;
	chunk.content = this.content;
	chunk.storeName = this.storeName;
	chunk.edited = this.edited;

	return chunk;
};

Chunk.prototype.contains = function contains (index) {
	return this.start < index && index < this.end;
};

Chunk.prototype.eachNext = function eachNext (fn) {
	var chunk = this;
	while (chunk) {
		fn(chunk);
		chunk = chunk.next;
	}
};

Chunk.prototype.eachPrevious = function eachPrevious (fn) {
	var chunk = this;
	while (chunk) {
		fn(chunk);
		chunk = chunk.previous;
	}
};

Chunk.prototype.edit = function edit (content, storeName, contentOnly) {
	this.content = content;
	if (!contentOnly) {
		this.intro = '';
		this.outro = '';
	}
	this.storeName = storeName;

	this.edited = true;

	return this;
};

Chunk.prototype.prependLeft = function prependLeft (content) {
	this.outro = content + this.outro;
};

Chunk.prototype.prependRight = function prependRight (content) {
	this.intro = content + this.intro;
};

Chunk.prototype.split = function split (index) {
	var sliceIndex = index - this.start;

	var originalBefore = this.original.slice(0, sliceIndex);
	var originalAfter = this.original.slice(sliceIndex);

	this.original = originalBefore;

	var newChunk = new Chunk(index, this.end, originalAfter);
	newChunk.outro = this.outro;
	this.outro = '';

	this.end = index;

	if (this.edited) {
		// TODO is this block necessary?...
		newChunk.edit('', false);
		this.content = '';
	} else {
		this.content = originalBefore;
	}

	newChunk.next = this.next;
	if (newChunk.next) { newChunk.next.previous = newChunk; }
	newChunk.previous = this;
	this.next = newChunk;

	return newChunk;
};

Chunk.prototype.toString = function toString () {
	return this.intro + this.content + this.outro;
};

Chunk.prototype.trimEnd = function trimEnd (rx) {
	this.outro = this.outro.replace(rx, '');
	if (this.outro.length) { return true; }

	var trimmed = this.content.replace(rx, '');

	if (trimmed.length) {
		if (trimmed !== this.content) {
			this.split(this.start + trimmed.length).edit('', undefined, true);
		}
		return true;

	} else {
		this.edit('', undefined, true);

		this.intro = this.intro.replace(rx, '');
		if (this.intro.length) { return true; }
	}
};

Chunk.prototype.trimStart = function trimStart (rx) {
	this.intro = this.intro.replace(rx, '');
	if (this.intro.length) { return true; }

	var trimmed = this.content.replace(rx, '');

	if (trimmed.length) {
		if (trimmed !== this.content) {
			this.split(this.end - trimmed.length);
			this.edit('', undefined, true);
		}
		return true;

	} else {
		this.edit('', undefined, true);

		this.outro = this.outro.replace(rx, '');
		if (this.outro.length) { return true; }
	}
};

var btoa = function () {
	throw new Error('Unsupported environment: `window.btoa` or `Buffer` should be supported.');
};
if (typeof window !== 'undefined' && typeof window.btoa === 'function') {
	btoa = function (str) { return window.btoa(unescape(encodeURIComponent(str))); };
} else if (typeof Buffer === 'function') {
	btoa = function (str) { return Buffer.from(str, 'utf-8').toString('base64'); };
}

var SourceMap = function SourceMap(properties) {
	this.version = 3;
	this.file = properties.file;
	this.sources = properties.sources;
	this.sourcesContent = properties.sourcesContent;
	this.names = properties.names;
	this.mappings = encode(properties.mappings);
};

SourceMap.prototype.toString = function toString () {
	return JSON.stringify(this);
};

SourceMap.prototype.toUrl = function toUrl () {
	return 'data:application/json;charset=utf-8;base64,' + btoa(this.toString());
};

function guessIndent(code) {
	var lines = code.split('\n');

	var tabbed = lines.filter(function (line) { return /^\t+/.test(line); });
	var spaced = lines.filter(function (line) { return /^ {2,}/.test(line); });

	if (tabbed.length === 0 && spaced.length === 0) {
		return null;
	}

	// More lines tabbed than spaced? Assume tabs, and
	// default to tabs in the case of a tie (or nothing
	// to go on)
	if (tabbed.length >= spaced.length) {
		return '\t';
	}

	// Otherwise, we need to guess the multiple
	var min = spaced.reduce(function (previous, current) {
		var numSpaces = /^ +/.exec(current)[0].length;
		return Math.min(numSpaces, previous);
	}, Infinity);

	return new Array(min + 1).join(' ');
}

function getRelativePath(from, to) {
	var fromParts = from.split(/[/\\]/);
	var toParts = to.split(/[/\\]/);

	fromParts.pop(); // get dirname

	while (fromParts[0] === toParts[0]) {
		fromParts.shift();
		toParts.shift();
	}

	if (fromParts.length) {
		var i = fromParts.length;
		while (i--) { fromParts[i] = '..'; }
	}

	return fromParts.concat(toParts).join('/');
}

var toString = Object.prototype.toString;

function isObject(thing) {
	return toString.call(thing) === '[object Object]';
}

function getLocator(source) {
	var originalLines = source.split('\n');
	var lineOffsets = [];

	for (var i = 0, pos = 0; i < originalLines.length; i++) {
		lineOffsets.push(pos);
		pos += originalLines[i].length + 1;
	}

	return function locate(index) {
		var i = 0;
		var j = lineOffsets.length;
		while (i < j) {
			var m = (i + j) >> 1;
			if (index < lineOffsets[m]) {
				j = m;
			} else {
				i = m + 1;
			}
		}
		var line = i - 1;
		var column = index - lineOffsets[line];
		return { line: line, column: column };
	};
}

var Mappings = function Mappings(hires) {
	this.hires = hires;
	this.generatedCodeLine = 0;
	this.generatedCodeColumn = 0;
	this.raw = [];
	this.rawSegments = this.raw[this.generatedCodeLine] = [];
	this.pending = null;
};

Mappings.prototype.addEdit = function addEdit (sourceIndex, content, loc, nameIndex) {
	if (content.length) {
		var segment = [this.generatedCodeColumn, sourceIndex, loc.line, loc.column];
		if (nameIndex >= 0) {
			segment.push(nameIndex);
		}
		this.rawSegments.push(segment);
	} else if (this.pending) {
		this.rawSegments.push(this.pending);
	}

	this.advance(content);
	this.pending = null;
};

Mappings.prototype.addUneditedChunk = function addUneditedChunk (sourceIndex, chunk, original, loc, sourcemapLocations) {
	var originalCharIndex = chunk.start;
	var first = true;

	while (originalCharIndex < chunk.end) {
		if (this.hires || first || sourcemapLocations.has(originalCharIndex)) {
			this.rawSegments.push([this.generatedCodeColumn, sourceIndex, loc.line, loc.column]);
		}

		if (original[originalCharIndex] === '\n') {
			loc.line += 1;
			loc.column = 0;
			this.generatedCodeLine += 1;
			this.raw[this.generatedCodeLine] = this.rawSegments = [];
			this.generatedCodeColumn = 0;
			first = true;
		} else {
			loc.column += 1;
			this.generatedCodeColumn += 1;
			first = false;
		}

		originalCharIndex += 1;
	}

	this.pending = null;
};

Mappings.prototype.advance = function advance (str) {
	if (!str) { return; }

	var lines = str.split('\n');

	if (lines.length > 1) {
		for (var i = 0; i < lines.length - 1; i++) {
			this.generatedCodeLine++;
			this.raw[this.generatedCodeLine] = this.rawSegments = [];
		}
		this.generatedCodeColumn = 0;
	}

	this.generatedCodeColumn += lines[lines.length - 1].length;
};

var n = '\n';

var warned = {
	insertLeft: false,
	insertRight: false,
	storeName: false
};

var MagicString = function MagicString(string, options) {
	if ( options === void 0 ) options = {};

	var chunk = new Chunk(0, string.length, string);

	Object.defineProperties(this, {
		original:              { writable: true, value: string },
		outro:                 { writable: true, value: '' },
		intro:                 { writable: true, value: '' },
		firstChunk:            { writable: true, value: chunk },
		lastChunk:             { writable: true, value: chunk },
		lastSearchedChunk:     { writable: true, value: chunk },
		byStart:               { writable: true, value: {} },
		byEnd:                 { writable: true, value: {} },
		filename:              { writable: true, value: options.filename },
		indentExclusionRanges: { writable: true, value: options.indentExclusionRanges },
		sourcemapLocations:    { writable: true, value: new BitSet() },
		storedNames:           { writable: true, value: {} },
		indentStr:             { writable: true, value: guessIndent(string) }
	});

	this.byStart[0] = chunk;
	this.byEnd[string.length] = chunk;
};

MagicString.prototype.addSourcemapLocation = function addSourcemapLocation (char) {
	this.sourcemapLocations.add(char);
};

MagicString.prototype.append = function append (content) {
	if (typeof content !== 'string') { throw new TypeError('outro content must be a string'); }

	this.outro += content;
	return this;
};

MagicString.prototype.appendLeft = function appendLeft (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byEnd[index];

	if (chunk) {
		chunk.appendLeft(content);
	} else {
		this.intro += content;
	}
	return this;
};

MagicString.prototype.appendRight = function appendRight (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byStart[index];

	if (chunk) {
		chunk.appendRight(content);
	} else {
		this.outro += content;
	}
	return this;
};

MagicString.prototype.clone = function clone () {
	var cloned = new MagicString(this.original, { filename: this.filename });

	var originalChunk = this.firstChunk;
	var clonedChunk = (cloned.firstChunk = cloned.lastSearchedChunk = originalChunk.clone());

	while (originalChunk) {
		cloned.byStart[clonedChunk.start] = clonedChunk;
		cloned.byEnd[clonedChunk.end] = clonedChunk;

		var nextOriginalChunk = originalChunk.next;
		var nextClonedChunk = nextOriginalChunk && nextOriginalChunk.clone();

		if (nextClonedChunk) {
			clonedChunk.next = nextClonedChunk;
			nextClonedChunk.previous = clonedChunk;

			clonedChunk = nextClonedChunk;
		}

		originalChunk = nextOriginalChunk;
	}

	cloned.lastChunk = clonedChunk;

	if (this.indentExclusionRanges) {
		cloned.indentExclusionRanges = this.indentExclusionRanges.slice();
	}

	cloned.sourcemapLocations = new BitSet(this.sourcemapLocations);

	cloned.intro = this.intro;
	cloned.outro = this.outro;

	return cloned;
};

MagicString.prototype.generateDecodedMap = function generateDecodedMap (options) {
		var this$1 = this;

	options = options || {};

	var sourceIndex = 0;
	var names = Object.keys(this.storedNames);
	var mappings = new Mappings(options.hires);

	var locate = getLocator(this.original);

	if (this.intro) {
		mappings.advance(this.intro);
	}

	this.firstChunk.eachNext(function (chunk) {
		var loc = locate(chunk.start);

		if (chunk.intro.length) { mappings.advance(chunk.intro); }

		if (chunk.edited) {
			mappings.addEdit(
				sourceIndex,
				chunk.content,
				loc,
				chunk.storeName ? names.indexOf(chunk.original) : -1
			);
		} else {
			mappings.addUneditedChunk(sourceIndex, chunk, this$1.original, loc, this$1.sourcemapLocations);
		}

		if (chunk.outro.length) { mappings.advance(chunk.outro); }
	});

	return {
		file: options.file ? options.file.split(/[/\\]/).pop() : null,
		sources: [options.source ? getRelativePath(options.file || '', options.source) : null],
		sourcesContent: options.includeContent ? [this.original] : [null],
		names: names,
		mappings: mappings.raw
	};
};

MagicString.prototype.generateMap = function generateMap (options) {
	return new SourceMap(this.generateDecodedMap(options));
};

MagicString.prototype.getIndentString = function getIndentString () {
	return this.indentStr === null ? '\t' : this.indentStr;
};

MagicString.prototype.indent = function indent (indentStr, options) {
	var pattern = /^[^\r\n]/gm;

	if (isObject(indentStr)) {
		options = indentStr;
		indentStr = undefined;
	}

	indentStr = indentStr !== undefined ? indentStr : this.indentStr || '\t';

	if (indentStr === '') { return this; } // noop

	options = options || {};

	// Process exclusion ranges
	var isExcluded = {};

	if (options.exclude) {
		var exclusions =
			typeof options.exclude[0] === 'number' ? [options.exclude] : options.exclude;
		exclusions.forEach(function (exclusion) {
			for (var i = exclusion[0]; i < exclusion[1]; i += 1) {
				isExcluded[i] = true;
			}
		});
	}

	var shouldIndentNextCharacter = options.indentStart !== false;
	var replacer = function (match) {
		if (shouldIndentNextCharacter) { return ("" + indentStr + match); }
		shouldIndentNextCharacter = true;
		return match;
	};

	this.intro = this.intro.replace(pattern, replacer);

	var charIndex = 0;
	var chunk = this.firstChunk;

	while (chunk) {
		var end = chunk.end;

		if (chunk.edited) {
			if (!isExcluded[charIndex]) {
				chunk.content = chunk.content.replace(pattern, replacer);

				if (chunk.content.length) {
					shouldIndentNextCharacter = chunk.content[chunk.content.length - 1] === '\n';
				}
			}
		} else {
			charIndex = chunk.start;

			while (charIndex < end) {
				if (!isExcluded[charIndex]) {
					var char = this.original[charIndex];

					if (char === '\n') {
						shouldIndentNextCharacter = true;
					} else if (char !== '\r' && shouldIndentNextCharacter) {
						shouldIndentNextCharacter = false;

						if (charIndex === chunk.start) {
							chunk.prependRight(indentStr);
						} else {
							this._splitChunk(chunk, charIndex);
							chunk = chunk.next;
							chunk.prependRight(indentStr);
						}
					}
				}

				charIndex += 1;
			}
		}

		charIndex = chunk.end;
		chunk = chunk.next;
	}

	this.outro = this.outro.replace(pattern, replacer);

	return this;
};

MagicString.prototype.insert = function insert () {
	throw new Error('magicString.insert(...) is deprecated. Use prependRight(...) or appendLeft(...)');
};

MagicString.prototype.insertLeft = function insertLeft (index, content) {
	if (!warned.insertLeft) {
		console.warn('magicString.insertLeft(...) is deprecated. Use magicString.appendLeft(...) instead'); // eslint-disable-line no-console
		warned.insertLeft = true;
	}

	return this.appendLeft(index, content);
};

MagicString.prototype.insertRight = function insertRight (index, content) {
	if (!warned.insertRight) {
		console.warn('magicString.insertRight(...) is deprecated. Use magicString.prependRight(...) instead'); // eslint-disable-line no-console
		warned.insertRight = true;
	}

	return this.prependRight(index, content);
};

MagicString.prototype.move = function move (start, end, index) {
	if (index >= start && index <= end) { throw new Error('Cannot move a selection inside itself'); }

	this._split(start);
	this._split(end);
	this._split(index);

	var first = this.byStart[start];
	var last = this.byEnd[end];

	var oldLeft = first.previous;
	var oldRight = last.next;

	var newRight = this.byStart[index];
	if (!newRight && last === this.lastChunk) { return this; }
	var newLeft = newRight ? newRight.previous : this.lastChunk;

	if (oldLeft) { oldLeft.next = oldRight; }
	if (oldRight) { oldRight.previous = oldLeft; }

	if (newLeft) { newLeft.next = first; }
	if (newRight) { newRight.previous = last; }

	if (!first.previous) { this.firstChunk = last.next; }
	if (!last.next) {
		this.lastChunk = first.previous;
		this.lastChunk.next = null;
	}

	first.previous = newLeft;
	last.next = newRight || null;

	if (!newLeft) { this.firstChunk = first; }
	if (!newRight) { this.lastChunk = last; }
	return this;
};

MagicString.prototype.overwrite = function overwrite (start, end, content, options) {
	if (typeof content !== 'string') { throw new TypeError('replacement content must be a string'); }

	while (start < 0) { start += this.original.length; }
	while (end < 0) { end += this.original.length; }

	if (end > this.original.length) { throw new Error('end is out of bounds'); }
	if (start === end)
		{ throw new Error('Cannot overwrite a zero-length range – use appendLeft or prependRight instead'); }

	this._split(start);
	this._split(end);

	if (options === true) {
		if (!warned.storeName) {
			console.warn('The final argument to magicString.overwrite(...) should be an options object. See https://github.com/rich-harris/magic-string'); // eslint-disable-line no-console
			warned.storeName = true;
		}

		options = { storeName: true };
	}
	var storeName = options !== undefined ? options.storeName : false;
	var contentOnly = options !== undefined ? options.contentOnly : false;

	if (storeName) {
		var original = this.original.slice(start, end);
		this.storedNames[original] = true;
	}

	var first = this.byStart[start];
	var last = this.byEnd[end];

	if (first) {
		if (end > first.end && first.next !== this.byStart[first.end]) {
			throw new Error('Cannot overwrite across a split point');
		}

		first.edit(content, storeName, contentOnly);

		if (first !== last) {
			var chunk = first.next;
			while (chunk !== last) {
				chunk.edit('', false);
				chunk = chunk.next;
			}

			chunk.edit('', false);
		}
	} else {
		// must be inserting at the end
		var newChunk = new Chunk(start, end, '').edit(content, storeName);

		// TODO last chunk in the array may not be the last chunk, if it's moved...
		last.next = newChunk;
		newChunk.previous = last;
	}
	return this;
};

MagicString.prototype.prepend = function prepend (content) {
	if (typeof content !== 'string') { throw new TypeError('outro content must be a string'); }

	this.intro = content + this.intro;
	return this;
};

MagicString.prototype.prependLeft = function prependLeft (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byEnd[index];

	if (chunk) {
		chunk.prependLeft(content);
	} else {
		this.intro = content + this.intro;
	}
	return this;
};

MagicString.prototype.prependRight = function prependRight (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byStart[index];

	if (chunk) {
		chunk.prependRight(content);
	} else {
		this.outro = content + this.outro;
	}
	return this;
};

MagicString.prototype.remove = function remove (start, end) {
	while (start < 0) { start += this.original.length; }
	while (end < 0) { end += this.original.length; }

	if (start === end) { return this; }

	if (start < 0 || end > this.original.length) { throw new Error('Character is out of bounds'); }
	if (start > end) { throw new Error('end must be greater than start'); }

	this._split(start);
	this._split(end);

	var chunk = this.byStart[start];

	while (chunk) {
		chunk.intro = '';
		chunk.outro = '';
		chunk.edit('');

		chunk = end > chunk.end ? this.byStart[chunk.end] : null;
	}
	return this;
};

MagicString.prototype.lastChar = function lastChar () {
	if (this.outro.length)
		{ return this.outro[this.outro.length - 1]; }
	var chunk = this.lastChunk;
	do {
		if (chunk.outro.length)
			{ return chunk.outro[chunk.outro.length - 1]; }
		if (chunk.content.length)
			{ return chunk.content[chunk.content.length - 1]; }
		if (chunk.intro.length)
			{ return chunk.intro[chunk.intro.length - 1]; }
	} while (chunk = chunk.previous);
	if (this.intro.length)
		{ return this.intro[this.intro.length - 1]; }
	return '';
};

MagicString.prototype.lastLine = function lastLine () {
	var lineIndex = this.outro.lastIndexOf(n);
	if (lineIndex !== -1)
		{ return this.outro.substr(lineIndex + 1); }
	var lineStr = this.outro;
	var chunk = this.lastChunk;
	do {
		if (chunk.outro.length > 0) {
			lineIndex = chunk.outro.lastIndexOf(n);
			if (lineIndex !== -1)
				{ return chunk.outro.substr(lineIndex + 1) + lineStr; }
			lineStr = chunk.outro + lineStr;
		}

		if (chunk.content.length > 0) {
			lineIndex = chunk.content.lastIndexOf(n);
			if (lineIndex !== -1)
				{ return chunk.content.substr(lineIndex + 1) + lineStr; }
			lineStr = chunk.content + lineStr;
		}

		if (chunk.intro.length > 0) {
			lineIndex = chunk.intro.lastIndexOf(n);
			if (lineIndex !== -1)
				{ return chunk.intro.substr(lineIndex + 1) + lineStr; }
			lineStr = chunk.intro + lineStr;
		}
	} while (chunk = chunk.previous);
	lineIndex = this.intro.lastIndexOf(n);
	if (lineIndex !== -1)
		{ return this.intro.substr(lineIndex + 1) + lineStr; }
	return this.intro + lineStr;
};

MagicString.prototype.slice = function slice (start, end) {
		if ( start === void 0 ) start = 0;
		if ( end === void 0 ) end = this.original.length;

	while (start < 0) { start += this.original.length; }
	while (end < 0) { end += this.original.length; }

	var result = '';

	// find start chunk
	var chunk = this.firstChunk;
	while (chunk && (chunk.start > start || chunk.end <= start)) {
		// found end chunk before start
		if (chunk.start < end && chunk.end >= end) {
			return result;
		}

		chunk = chunk.next;
	}

	if (chunk && chunk.edited && chunk.start !== start)
		{ throw new Error(("Cannot use replaced character " + start + " as slice start anchor.")); }

	var startChunk = chunk;
	while (chunk) {
		if (chunk.intro && (startChunk !== chunk || chunk.start === start)) {
			result += chunk.intro;
		}

		var containsEnd = chunk.start < end && chunk.end >= end;
		if (containsEnd && chunk.edited && chunk.end !== end)
			{ throw new Error(("Cannot use replaced character " + end + " as slice end anchor.")); }

		var sliceStart = startChunk === chunk ? start - chunk.start : 0;
		var sliceEnd = containsEnd ? chunk.content.length + end - chunk.end : chunk.content.length;

		result += chunk.content.slice(sliceStart, sliceEnd);

		if (chunk.outro && (!containsEnd || chunk.end === end)) {
			result += chunk.outro;
		}

		if (containsEnd) {
			break;
		}

		chunk = chunk.next;
	}

	return result;
};

// TODO deprecate this? not really very useful
MagicString.prototype.snip = function snip (start, end) {
	var clone = this.clone();
	clone.remove(0, start);
	clone.remove(end, clone.original.length);

	return clone;
};

MagicString.prototype._split = function _split (index) {
	if (this.byStart[index] || this.byEnd[index]) { return; }

	var chunk = this.lastSearchedChunk;
	var searchForward = index > chunk.end;

	while (chunk) {
		if (chunk.contains(index)) { return this._splitChunk(chunk, index); }

		chunk = searchForward ? this.byStart[chunk.end] : this.byEnd[chunk.start];
	}
};

MagicString.prototype._splitChunk = function _splitChunk (chunk, index) {
	if (chunk.edited && chunk.content.length) {
		// zero-length edited chunks are a special case (overlapping replacements)
		var loc = getLocator(this.original)(index);
		throw new Error(
			("Cannot split a chunk that has already been edited (" + (loc.line) + ":" + (loc.column) + " – \"" + (chunk.original) + "\")")
		);
	}

	var newChunk = chunk.split(index);

	this.byEnd[index] = chunk;
	this.byStart[index] = newChunk;
	this.byEnd[newChunk.end] = newChunk;

	if (chunk === this.lastChunk) { this.lastChunk = newChunk; }

	this.lastSearchedChunk = chunk;
	return true;
};

MagicString.prototype.toString = function toString () {
	var str = this.intro;

	var chunk = this.firstChunk;
	while (chunk) {
		str += chunk.toString();
		chunk = chunk.next;
	}

	return str + this.outro;
};

MagicString.prototype.isEmpty = function isEmpty () {
	var chunk = this.firstChunk;
	do {
		if (chunk.intro.length && chunk.intro.trim() ||
				chunk.content.length && chunk.content.trim() ||
				chunk.outro.length && chunk.outro.trim())
			{ return false; }
	} while (chunk = chunk.next);
	return true;
};

MagicString.prototype.length = function length () {
	var chunk = this.firstChunk;
	var length = 0;
	do {
		length += chunk.intro.length + chunk.content.length + chunk.outro.length;
	} while (chunk = chunk.next);
	return length;
};

MagicString.prototype.trimLines = function trimLines () {
	return this.trim('[\\r\\n]');
};

MagicString.prototype.trim = function trim (charType) {
	return this.trimStart(charType).trimEnd(charType);
};

MagicString.prototype.trimEndAborted = function trimEndAborted (charType) {
	var rx = new RegExp((charType || '\\s') + '+$');

	this.outro = this.outro.replace(rx, '');
	if (this.outro.length) { return true; }

	var chunk = this.lastChunk;

	do {
		var end = chunk.end;
		var aborted = chunk.trimEnd(rx);

		// if chunk was trimmed, we have a new lastChunk
		if (chunk.end !== end) {
			if (this.lastChunk === chunk) {
				this.lastChunk = chunk.next;
			}

			this.byEnd[chunk.end] = chunk;
			this.byStart[chunk.next.start] = chunk.next;
			this.byEnd[chunk.next.end] = chunk.next;
		}

		if (aborted) { return true; }
		chunk = chunk.previous;
	} while (chunk);

	return false;
};

MagicString.prototype.trimEnd = function trimEnd (charType) {
	this.trimEndAborted(charType);
	return this;
};
MagicString.prototype.trimStartAborted = function trimStartAborted (charType) {
	var rx = new RegExp('^' + (charType || '\\s') + '+');

	this.intro = this.intro.replace(rx, '');
	if (this.intro.length) { return true; }

	var chunk = this.firstChunk;

	do {
		var end = chunk.end;
		var aborted = chunk.trimStart(rx);

		if (chunk.end !== end) {
			// special case...
			if (chunk === this.lastChunk) { this.lastChunk = chunk.next; }

			this.byEnd[chunk.end] = chunk;
			this.byStart[chunk.next.start] = chunk.next;
			this.byEnd[chunk.next.end] = chunk.next;
		}

		if (aborted) { return true; }
		chunk = chunk.next;
	} while (chunk);

	return false;
};

MagicString.prototype.trimStart = function trimStart (charType) {
	this.trimStartAborted(charType);
	return this;
};

var hasOwnProp = Object.prototype.hasOwnProperty;

var Bundle = function Bundle(options) {
	if ( options === void 0 ) options = {};

	this.intro = options.intro || '';
	this.separator = options.separator !== undefined ? options.separator : '\n';
	this.sources = [];
	this.uniqueSources = [];
	this.uniqueSourceIndexByFilename = {};
};

Bundle.prototype.addSource = function addSource (source) {
	if (source instanceof MagicString) {
		return this.addSource({
			content: source,
			filename: source.filename,
			separator: this.separator
		});
	}

	if (!isObject(source) || !source.content) {
		throw new Error('bundle.addSource() takes an object with a `content` property, which should be an instance of MagicString, and an optional `filename`');
	}

	['filename', 'indentExclusionRanges', 'separator'].forEach(function (option) {
		if (!hasOwnProp.call(source, option)) { source[option] = source.content[option]; }
	});

	if (source.separator === undefined) {
		// TODO there's a bunch of this sort of thing, needs cleaning up
		source.separator = this.separator;
	}

	if (source.filename) {
		if (!hasOwnProp.call(this.uniqueSourceIndexByFilename, source.filename)) {
			this.uniqueSourceIndexByFilename[source.filename] = this.uniqueSources.length;
			this.uniqueSources.push({ filename: source.filename, content: source.content.original });
		} else {
			var uniqueSource = this.uniqueSources[this.uniqueSourceIndexByFilename[source.filename]];
			if (source.content.original !== uniqueSource.content) {
				throw new Error(("Illegal source: same filename (" + (source.filename) + "), different contents"));
			}
		}
	}

	this.sources.push(source);
	return this;
};

Bundle.prototype.append = function append (str, options) {
	this.addSource({
		content: new MagicString(str),
		separator: (options && options.separator) || ''
	});

	return this;
};

Bundle.prototype.clone = function clone () {
	var bundle = new Bundle({
		intro: this.intro,
		separator: this.separator
	});

	this.sources.forEach(function (source) {
		bundle.addSource({
			filename: source.filename,
			content: source.content.clone(),
			separator: source.separator
		});
	});

	return bundle;
};

Bundle.prototype.generateDecodedMap = function generateDecodedMap (options) {
		var this$1 = this;
		if ( options === void 0 ) options = {};

	var names = [];
	this.sources.forEach(function (source) {
		Object.keys(source.content.storedNames).forEach(function (name) {
			if (!~names.indexOf(name)) { names.push(name); }
		});
	});

	var mappings = new Mappings(options.hires);

	if (this.intro) {
		mappings.advance(this.intro);
	}

	this.sources.forEach(function (source, i) {
		if (i > 0) {
			mappings.advance(this$1.separator);
		}

		var sourceIndex = source.filename ? this$1.uniqueSourceIndexByFilename[source.filename] : -1;
		var magicString = source.content;
		var locate = getLocator(magicString.original);

		if (magicString.intro) {
			mappings.advance(magicString.intro);
		}

		magicString.firstChunk.eachNext(function (chunk) {
			var loc = locate(chunk.start);

			if (chunk.intro.length) { mappings.advance(chunk.intro); }

			if (source.filename) {
				if (chunk.edited) {
					mappings.addEdit(
						sourceIndex,
						chunk.content,
						loc,
						chunk.storeName ? names.indexOf(chunk.original) : -1
					);
				} else {
					mappings.addUneditedChunk(
						sourceIndex,
						chunk,
						magicString.original,
						loc,
						magicString.sourcemapLocations
					);
				}
			} else {
				mappings.advance(chunk.content);
			}

			if (chunk.outro.length) { mappings.advance(chunk.outro); }
		});

		if (magicString.outro) {
			mappings.advance(magicString.outro);
		}
	});

	return {
		file: options.file ? options.file.split(/[/\\]/).pop() : null,
		sources: this.uniqueSources.map(function (source) {
			return options.file ? getRelativePath(options.file, source.filename) : source.filename;
		}),
		sourcesContent: this.uniqueSources.map(function (source) {
			return options.includeContent ? source.content : null;
		}),
		names: names,
		mappings: mappings.raw
	};
};

Bundle.prototype.generateMap = function generateMap (options) {
	return new SourceMap(this.generateDecodedMap(options));
};

Bundle.prototype.getIndentString = function getIndentString () {
	var indentStringCounts = {};

	this.sources.forEach(function (source) {
		var indentStr = source.content.indentStr;

		if (indentStr === null) { return; }

		if (!indentStringCounts[indentStr]) { indentStringCounts[indentStr] = 0; }
		indentStringCounts[indentStr] += 1;
	});

	return (
		Object.keys(indentStringCounts).sort(function (a, b) {
			return indentStringCounts[a] - indentStringCounts[b];
		})[0] || '\t'
	);
};

Bundle.prototype.indent = function indent (indentStr) {
		var this$1 = this;

	if (!arguments.length) {
		indentStr = this.getIndentString();
	}

	if (indentStr === '') { return this; } // noop

	var trailingNewline = !this.intro || this.intro.slice(-1) === '\n';

	this.sources.forEach(function (source, i) {
		var separator = source.separator !== undefined ? source.separator : this$1.separator;
		var indentStart = trailingNewline || (i > 0 && /\r?\n$/.test(separator));

		source.content.indent(indentStr, {
			exclude: source.indentExclusionRanges,
			indentStart: indentStart //: trailingNewline || /\r?\n$/.test( separator )  //true///\r?\n/.test( separator )
		});

		trailingNewline = source.content.lastChar() === '\n';
	});

	if (this.intro) {
		this.intro =
			indentStr +
			this.intro.replace(/^[^\n]/gm, function (match, index) {
				return index > 0 ? indentStr + match : match;
			});
	}

	return this;
};

Bundle.prototype.prepend = function prepend (str) {
	this.intro = str + this.intro;
	return this;
};

Bundle.prototype.toString = function toString () {
		var this$1 = this;

	var body = this.sources
		.map(function (source, i) {
			var separator = source.separator !== undefined ? source.separator : this$1.separator;
			var str = (i > 0 ? separator : '') + source.content.toString();

			return str;
		})
		.join('');

	return this.intro + body;
};

Bundle.prototype.isEmpty = function isEmpty () {
	if (this.intro.length && this.intro.trim())
		{ return false; }
	if (this.sources.some(function (source) { return !source.content.isEmpty(); }))
		{ return false; }
	return true;
};

Bundle.prototype.length = function length () {
	return this.sources.reduce(function (length, source) { return length + source.content.length(); }, this.intro.length);
};

Bundle.prototype.trimLines = function trimLines () {
	return this.trim('[\\r\\n]');
};

Bundle.prototype.trim = function trim (charType) {
	return this.trimStart(charType).trimEnd(charType);
};

Bundle.prototype.trimStart = function trimStart (charType) {
	var rx = new RegExp('^' + (charType || '\\s') + '+');
	this.intro = this.intro.replace(rx, '');

	if (!this.intro) {
		var source;
		var i = 0;

		do {
			source = this.sources[i++];
			if (!source) {
				break;
			}
		} while (!source.content.trimStartAborted(charType));
	}

	return this;
};

Bundle.prototype.trimEnd = function trimEnd (charType) {
	var rx = new RegExp((charType || '\\s') + '+$');

	var source;
	var i = this.sources.length - 1;

	do {
		source = this.sources[i--];
		if (!source) {
			this.intro = this.intro.replace(rx, '');
			break;
		}
	} while (!source.content.trimEndAborted(charType));

	return this;
};

function relative(from, to) {
    const fromParts = from.split(/[/\\]/).filter(Boolean);
    const toParts = to.split(/[/\\]/).filter(Boolean);
    if (fromParts[0] === '.')
        fromParts.shift();
    if (toParts[0] === '.')
        toParts.shift();
    while (fromParts[0] && toParts[0] && fromParts[0] === toParts[0]) {
        fromParts.shift();
        toParts.shift();
    }
    while (toParts[0] === '..' && fromParts.length > 0) {
        toParts.shift();
        fromParts.pop();
    }
    while (fromParts.pop()) {
        toParts.unshift('..');
    }
    return toParts.join('/');
}

const ArrowFunctionExpression = 'ArrowFunctionExpression';
const BlockStatement = 'BlockStatement';
const CallExpression = 'CallExpression';
const ExpressionStatement = 'ExpressionStatement';
const FunctionExpression = 'FunctionExpression';
const Identifier = 'Identifier';
const ImportDefaultSpecifier = 'ImportDefaultSpecifier';
const ImportNamespaceSpecifier = 'ImportNamespaceSpecifier';
const Program = 'Program';
const Property = 'Property';
const ReturnStatement = 'ReturnStatement';

function treeshakeNode(node, code, start, end) {
    code.remove(start, end);
    if (node.annotations) {
        for (const annotation of node.annotations) {
            if (annotation.start < start) {
                code.remove(annotation.start, annotation.end);
            }
            else {
                return;
            }
        }
    }
}
function removeAnnotations(node, code) {
    if (!node.annotations && node.parent.type === ExpressionStatement) {
        node = node.parent;
    }
    if (node.annotations) {
        for (const annotation of node.annotations) {
            code.remove(annotation.start, annotation.end);
        }
    }
}

const NO_SEMICOLON = { isNoStatement: true };
// This assumes there are only white-space and comments between start and the string we are looking for
function findFirstOccurrenceOutsideComment(code, searchString, start = 0) {
    let searchPos, charCodeAfterSlash;
    searchPos = code.indexOf(searchString, start);
    while (true) {
        start = code.indexOf('/', start);
        if (start === -1 || start >= searchPos)
            return searchPos;
        charCodeAfterSlash = code.charCodeAt(++start);
        ++start;
        // With our assumption, '/' always starts a comment. Determine comment type:
        start =
            charCodeAfterSlash === 47 /*"/"*/
                ? code.indexOf('\n', start) + 1
                : code.indexOf('*/', start) + 2;
        if (start > searchPos) {
            searchPos = code.indexOf(searchString, start);
        }
    }
}
const WHITESPACE = /\s/;
function findNonWhiteSpace(code, index) {
    while (index < code.length && WHITESPACE.test(code[index]))
        index++;
    return index;
}
// This assumes "code" only contains white-space and comments
// Returns position of line-comment if applicable
function findFirstLineBreakOutsideComment(code) {
    let lineBreakPos, charCodeAfterSlash, start = 0;
    lineBreakPos = code.indexOf('\n', start);
    while (true) {
        start = code.indexOf('/', start);
        if (start === -1 || start > lineBreakPos)
            return [lineBreakPos, lineBreakPos + 1];
        // With our assumption, '/' always starts a comment. Determine comment type:
        charCodeAfterSlash = code.charCodeAt(start + 1);
        if (charCodeAfterSlash === 47 /*"/"*/)
            return [start, lineBreakPos + 1];
        start = code.indexOf('*/', start + 3) + 2;
        if (start > lineBreakPos) {
            lineBreakPos = code.indexOf('\n', start);
        }
    }
}
function renderStatementList(statements, code, start, end, options) {
    let currentNode, currentNodeStart, currentNodeNeedsBoundaries, nextNodeStart;
    let nextNode = statements[0];
    let nextNodeNeedsBoundaries = !nextNode.included || nextNode.needsBoundaries;
    if (nextNodeNeedsBoundaries) {
        nextNodeStart =
            start + findFirstLineBreakOutsideComment(code.original.slice(start, nextNode.start))[1];
    }
    for (let nextIndex = 1; nextIndex <= statements.length; nextIndex++) {
        currentNode = nextNode;
        currentNodeStart = nextNodeStart;
        currentNodeNeedsBoundaries = nextNodeNeedsBoundaries;
        nextNode = statements[nextIndex];
        nextNodeNeedsBoundaries =
            nextNode === undefined ? false : !nextNode.included || nextNode.needsBoundaries;
        if (currentNodeNeedsBoundaries || nextNodeNeedsBoundaries) {
            nextNodeStart =
                currentNode.end +
                    findFirstLineBreakOutsideComment(code.original.slice(currentNode.end, nextNode === undefined ? end : nextNode.start))[1];
            if (currentNode.included) {
                currentNodeNeedsBoundaries
                    ? currentNode.render(code, options, {
                        end: nextNodeStart,
                        start: currentNodeStart
                    })
                    : currentNode.render(code, options);
            }
            else {
                treeshakeNode(currentNode, code, currentNodeStart, nextNodeStart);
            }
        }
        else {
            currentNode.render(code, options);
        }
    }
}
// This assumes that the first character is not part of the first node
function getCommaSeparatedNodesWithBoundaries(nodes, code, start, end) {
    const splitUpNodes = [];
    let node, nextNode, nextNodeStart, contentEnd, char;
    let separator = start - 1;
    for (let nextIndex = 0; nextIndex < nodes.length; nextIndex++) {
        nextNode = nodes[nextIndex];
        if (node !== undefined) {
            separator =
                node.end +
                    findFirstOccurrenceOutsideComment(code.original.slice(node.end, nextNode.start), ',');
        }
        nextNodeStart = contentEnd =
            separator +
                1 +
                findFirstLineBreakOutsideComment(code.original.slice(separator + 1, nextNode.start))[1];
        while (((char = code.original.charCodeAt(nextNodeStart)),
            char === 32 /*" "*/ || char === 9 /*"\t"*/ || char === 10 /*"\n"*/ || char === 13) /*"\r"*/)
            nextNodeStart++;
        if (node !== undefined) {
            splitUpNodes.push({
                contentEnd,
                end: nextNodeStart,
                node,
                separator,
                start
            });
        }
        node = nextNode;
        start = nextNodeStart;
    }
    splitUpNodes.push({
        contentEnd: end,
        end,
        node: node,
        separator: null,
        start
    });
    return splitUpNodes;
}
// This assumes there are only white-space and comments between start and end
function removeLineBreaks(code, start, end) {
    while (true) {
        const [removeStart, removeEnd] = findFirstLineBreakOutsideComment(code.original.slice(start, end));
        if (removeStart === -1) {
            break;
        }
        code.remove(start + removeStart, (start += removeEnd));
    }
}

function getSystemExportStatement(exportedVariables, options) {
    const _ = options.compact ? '' : ' ';
    if (exportedVariables.length === 1 &&
        options.exportNamesByVariable.get(exportedVariables[0]).length === 1) {
        const variable = exportedVariables[0];
        return `exports('${options.exportNamesByVariable.get(variable)}',${_}${variable.getName()})`;
    }
    else {
        return `exports({${_}${exportedVariables
            .map(variable => {
            return options.exportNamesByVariable
                .get(variable)
                .map(exportName => `${exportName}:${_}${variable.getName()}`)
                .join(`,${_}`);
        })
            .join(`,${_}`)}${_}})`;
    }
}
function getSystemExportFunctionLeft(exportedVariables, setFromExpression, options) {
    const _ = options.compact ? '' : ' ';
    const s = options.compact ? '' : ';';
    return `function${_}(v)${_}{${_}return exports({${_}${exportedVariables
        .map(variable => {
        return options.exportNamesByVariable
            .get(variable)
            .map(exportName => `${exportName}:${_}${setFromExpression ? variable.getName() : 'v'}`)
            .join(`,${_}`);
    })
        .join(`,${_}`)}${_}}),${_}v${s}${_}}(`;
}

const chars$1 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_$';
const base = 64;
function toBase64(num) {
    let outStr = '';
    do {
        const curDigit = num % base;
        num = Math.floor(num / base);
        outStr = chars$1[curDigit] + outStr;
    } while (num !== 0);
    return outStr;
}

const RESERVED_NAMES = {
    // @ts-ignore
    __proto__: null,
    await: true,
    break: true,
    case: true,
    catch: true,
    class: true,
    const: true,
    continue: true,
    debugger: true,
    default: true,
    delete: true,
    do: true,
    else: true,
    enum: true,
    eval: true,
    export: true,
    extends: true,
    false: true,
    finally: true,
    for: true,
    function: true,
    if: true,
    implements: true,
    import: true,
    in: true,
    instanceof: true,
    interface: true,
    let: true,
    new: true,
    null: true,
    package: true,
    private: true,
    protected: true,
    public: true,
    return: true,
    static: true,
    super: true,
    switch: true,
    this: true,
    throw: true,
    true: true,