diff --git a/compiler/svelte.js b/compiler/svelte.js
new file mode 100644
index 0000000000..599cb12829
--- /dev/null
+++ b/compiler/svelte.js
@@ -0,0 +1,6982 @@
+(function (global, factory) {
+ typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('magic-string')) :
+ typeof define === 'function' && define.amd ? define(['exports', 'magic-string'], factory) :
+ (factory((global.svelte = global.svelte || {}),global.MagicString));
+}(this, (function (exports,MagicString) { 'use strict';
+
+var MagicString__default = 'default' in MagicString ? MagicString['default'] : MagicString;
+
+function getLocator ( source, options ) {
+ if ( options === void 0 ) options = {};
+
+ var offsetLine = options.offsetLine || 0;
+ var offsetColumn = options.offsetColumn || 0;
+
+ var originalLines = source.split( '\n' );
+
+ var start = 0;
+ var lineRanges = originalLines.map( function ( line, i ) {
+ var end = start + line.length + 1;
+ var range = { start: start, end: end, line: i };
+
+ start = end;
+ return range;
+ });
+
+ var i = 0;
+
+ function rangeContains ( range, index ) {
+ return range.start <= index && index < range.end;
+ }
+
+ function getLocation ( range, index ) {
+ return { line: offsetLine + range.line, column: offsetColumn + index - range.start, character: index };
+ }
+
+ return function locate ( search, startIndex ) {
+ if ( typeof search === 'string' ) {
+ search = source.indexOf( search, startIndex || 0 );
+ }
+
+ var range = lineRanges[i];
+
+ var d = search >= range.end ? 1 : -1;
+
+ while ( range ) {
+ if ( rangeContains( range, search ) ) return getLocation( range, search );
+
+ i += d;
+ range = lineRanges[i];
+ }
+ };
+}
+
+function locate ( source, search, options ) {
+ if ( typeof options === 'number' ) {
+ throw new Error( 'locate takes a { startIndex, offsetLine, offsetColumn } object as the third argument' );
+ }
+
+ return getLocator( source, options )( search, options && options.startIndex );
+}
+
+// Reserved word lists for various dialects of the language
+
+var reservedWords = {
+ 3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile",
+ 5: "class enum extends super const export import",
+ 6: "enum",
+ strict: "implements interface let package private protected public static yield",
+ strictBind: "eval arguments"
+};
+
+// And the keywords
+
+var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
+
+var keywords = {
+ 5: ecma5AndLessKeywords,
+ 6: ecma5AndLessKeywords + " const class extends export import super"
+};
+
+// ## Character categories
+
+// Big ugly regular expressions that match characters in the
+// whitespace, identifier, and identifier-start categories. These
+// are only applied when a character is found to actually have a
+// code point above 128.
+// Generated by `bin/generate-identifier-regex.js`.
+
+var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
+var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
+
+var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
+var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
+
+nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
+
+// These are a run-length and offset encoded representation of the
+// >0xffff code points that are a valid part of identifiers. The
+// offset starts at 0x10000, and each pair of numbers represents an
+// offset to the next range, and then a size of the range. They were
+// generated by bin/generate-identifier-regex.js
+var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541];
+var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239];
+
+// This has a complexity linear to the value of the code. The
+// assumption is that looking up astral identifier characters is
+// rare.
+function isInAstralSet(code, set) {
+ var pos = 0x10000;
+ for (var i = 0; i < set.length; i += 2) {
+ pos += set[i];
+ if (pos > code) return false
+ pos += set[i + 1];
+ if (pos >= code) return true
+ }
+}
+
+// Test whether a given character code starts an identifier.
+
+function isIdentifierStart(code, astral) {
+ if (code < 65) return code === 36
+ if (code < 91) return true
+ if (code < 97) return code === 95
+ if (code < 123) return true
+ if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
+ if (astral === false) return false
+ return isInAstralSet(code, astralIdentifierStartCodes)
+}
+
+// Test whether a given character is part of an identifier.
+
+function isIdentifierChar(code, astral) {
+ if (code < 48) return code === 36
+ if (code < 58) return true
+ if (code < 65) return false
+ if (code < 91) return true
+ if (code < 97) return code === 95
+ if (code < 123) return true
+ if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))
+ if (astral === false) return false
+ return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
+}
+
+// ## Token types
+
+// The assignment of fine-grained, information-carrying type objects
+// allows the tokenizer to store the information it has about a
+// token in a way that is very cheap for the parser to look up.
+
+// All token type variables start with an underscore, to make them
+// easy to recognize.
+
+// The `beforeExpr` property is used to disambiguate between regular
+// expressions and divisions. It is set on all token types that can
+// be followed by an expression (thus, a slash after them would be a
+// regular expression).
+//
+// The `startsExpr` property is used to check if the token ends a
+// `yield` expression. It is set on all token types that either can
+// directly start an expression (like a quotation mark) or can
+// continue an expression (like the body of a string).
+//
+// `isLoop` marks a keyword as starting a loop, which is important
+// to know when parsing a label, in order to allow or disallow
+// continue jumps to that label.
+
+var TokenType = function TokenType(label, conf) {
+ if ( conf === void 0 ) conf = {};
+
+ this.label = label;
+ this.keyword = conf.keyword;
+ this.beforeExpr = !!conf.beforeExpr;
+ this.startsExpr = !!conf.startsExpr;
+ this.isLoop = !!conf.isLoop;
+ this.isAssign = !!conf.isAssign;
+ this.prefix = !!conf.prefix;
+ this.postfix = !!conf.postfix;
+ this.binop = conf.binop || null;
+ this.updateContext = null;
+};
+
+function binop(name, prec) {
+ return new TokenType(name, {beforeExpr: true, binop: prec})
+}
+var beforeExpr = {beforeExpr: true};
+var startsExpr = {startsExpr: true};
+// Map keyword names to token types.
+
+var keywordTypes = {};
+
+// Succinct definitions of keyword token types
+function kw(name, options) {
+ if ( options === void 0 ) options = {};
+
+ options.keyword = name;
+ return keywordTypes[name] = new TokenType(name, options)
+}
+
+var tt = {
+ num: new TokenType("num", startsExpr),
+ regexp: new TokenType("regexp", startsExpr),
+ string: new TokenType("string", startsExpr),
+ name: new TokenType("name", startsExpr),
+ eof: new TokenType("eof"),
+
+ // Punctuation token types.
+ bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
+ bracketR: new TokenType("]"),
+ braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
+ braceR: new TokenType("}"),
+ parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
+ parenR: new TokenType(")"),
+ comma: new TokenType(",", beforeExpr),
+ semi: new TokenType(";", beforeExpr),
+ colon: new TokenType(":", beforeExpr),
+ dot: new TokenType("."),
+ question: new TokenType("?", beforeExpr),
+ arrow: new TokenType("=>", beforeExpr),
+ template: new TokenType("template"),
+ ellipsis: new TokenType("...", beforeExpr),
+ backQuote: new TokenType("`", startsExpr),
+ dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
+
+ // Operators. These carry several kinds of properties to help the
+ // parser use them properly (the presence of these properties is
+ // what categorizes them as operators).
+ //
+ // `binop`, when present, specifies that this operator is a binary
+ // operator, and will refer to its precedence.
+ //
+ // `prefix` and `postfix` mark the operator as a prefix or postfix
+ // unary operator.
+ //
+ // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
+ // binary operators with a very low precedence, that should result
+ // in AssignmentExpression nodes.
+
+ eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
+ assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
+ incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
+ prefix: new TokenType("prefix", {beforeExpr: true, prefix: true, startsExpr: true}),
+ logicalOR: binop("||", 1),
+ logicalAND: binop("&&", 2),
+ bitwiseOR: binop("|", 3),
+ bitwiseXOR: binop("^", 4),
+ bitwiseAND: binop("&", 5),
+ equality: binop("==/!=", 6),
+ relational: binop("", 7),
+ bitShift: binop("<>", 8),
+ plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
+ modulo: binop("%", 10),
+ star: binop("*", 10),
+ slash: binop("/", 10),
+ starstar: new TokenType("**", {beforeExpr: true}),
+
+ // Keyword token types.
+ _break: kw("break"),
+ _case: kw("case", beforeExpr),
+ _catch: kw("catch"),
+ _continue: kw("continue"),
+ _debugger: kw("debugger"),
+ _default: kw("default", beforeExpr),
+ _do: kw("do", {isLoop: true, beforeExpr: true}),
+ _else: kw("else", beforeExpr),
+ _finally: kw("finally"),
+ _for: kw("for", {isLoop: true}),
+ _function: kw("function", startsExpr),
+ _if: kw("if"),
+ _return: kw("return", beforeExpr),
+ _switch: kw("switch"),
+ _throw: kw("throw", beforeExpr),
+ _try: kw("try"),
+ _var: kw("var"),
+ _const: kw("const"),
+ _while: kw("while", {isLoop: true}),
+ _with: kw("with"),
+ _new: kw("new", {beforeExpr: true, startsExpr: true}),
+ _this: kw("this", startsExpr),
+ _super: kw("super", startsExpr),
+ _class: kw("class"),
+ _extends: kw("extends", beforeExpr),
+ _export: kw("export"),
+ _import: kw("import"),
+ _null: kw("null", startsExpr),
+ _true: kw("true", startsExpr),
+ _false: kw("false", startsExpr),
+ _in: kw("in", {beforeExpr: true, binop: 7}),
+ _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}),
+ _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
+ _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
+ _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
+};
+
+// Matches a whole line break (where CRLF is considered a single
+// line break). Used to count lines.
+
+var lineBreak = /\r\n?|\n|\u2028|\u2029/;
+var lineBreakG = new RegExp(lineBreak.source, "g");
+
+function isNewLine(code) {
+ return code === 10 || code === 13 || code === 0x2028 || code === 0x2029
+}
+
+var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
+
+var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
+
+function isArray(obj) {
+ return Object.prototype.toString.call(obj) === "[object Array]"
+}
+
+// Checks if an object has a property.
+
+function has(obj, propName) {
+ return Object.prototype.hasOwnProperty.call(obj, propName)
+}
+
+// These are used when `options.locations` is on, for the
+// `startLoc` and `endLoc` properties.
+
+var Position = function Position(line, col) {
+ this.line = line;
+ this.column = col;
+};
+
+Position.prototype.offset = function offset (n) {
+ return new Position(this.line, this.column + n)
+};
+
+var SourceLocation = function SourceLocation(p, start, end) {
+ this.start = start;
+ this.end = end;
+ if (p.sourceFile !== null) this.source = p.sourceFile;
+};
+
+// The `getLineInfo` function is mostly useful when the
+// `locations` option is off (for performance reasons) and you
+// want to find the line/column position for a given character
+// offset. `input` should be the code string that the offset refers
+// into.
+
+function getLineInfo(input, offset) {
+ for (var line = 1, cur = 0;;) {
+ lineBreakG.lastIndex = cur;
+ var match = lineBreakG.exec(input);
+ if (match && match.index < offset) {
+ ++line;
+ cur = match.index + match[0].length;
+ } else {
+ return new Position(line, offset - cur)
+ }
+ }
+}
+
+// A second optional argument can be given to further configure
+// the parser process. These options are recognized:
+
+var defaultOptions = {
+ // `ecmaVersion` indicates the ECMAScript version to parse. Must
+ // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support
+ // for strict mode, the set of reserved words, and support for
+ // new syntax features. The default is 7.
+ ecmaVersion: 7,
+ // `sourceType` indicates the mode the code should be parsed in.
+ // Can be either `"script"` or `"module"`. This influences global
+ // strict mode and parsing of `import` and `export` declarations.
+ sourceType: "script",
+ // `onInsertedSemicolon` can be a callback that will be called
+ // when a semicolon is automatically inserted. It will be passed
+ // th position of the comma as an offset, and if `locations` is
+ // enabled, it is given the location as a `{line, column}` object
+ // as second argument.
+ onInsertedSemicolon: null,
+ // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
+ // trailing commas.
+ onTrailingComma: null,
+ // By default, reserved words are only enforced if ecmaVersion >= 5.
+ // Set `allowReserved` to a boolean value to explicitly turn this on
+ // an off. When this option has the value "never", reserved words
+ // and keywords can also not be used as property names.
+ allowReserved: null,
+ // When enabled, a return at the top level is not considered an
+ // error.
+ allowReturnOutsideFunction: false,
+ // When enabled, import/export statements are not constrained to
+ // appearing at the top of the program.
+ allowImportExportEverywhere: false,
+ // When enabled, hashbang directive in the beginning of file
+ // is allowed and treated as a line comment.
+ allowHashBang: false,
+ // When `locations` is on, `loc` properties holding objects with
+ // `start` and `end` properties in `{line, column}` form (with
+ // line being 1-based and column 0-based) will be attached to the
+ // nodes.
+ locations: false,
+ // A function can be passed as `onToken` option, which will
+ // cause Acorn to call that function with object in the same
+ // format as tokens returned from `tokenizer().getToken()`. Note
+ // that you are not allowed to call the parser from the
+ // callback—that will corrupt its internal state.
+ onToken: null,
+ // A function can be passed as `onComment` option, which will
+ // cause Acorn to call that function with `(block, text, start,
+ // end)` parameters whenever a comment is skipped. `block` is a
+ // boolean indicating whether this is a block (`/* */`) comment,
+ // `text` is the content of the comment, and `start` and `end` are
+ // character offsets that denote the start and end of the comment.
+ // When the `locations` option is on, two more parameters are
+ // passed, the full `{line, column}` locations of the start and
+ // end of the comments. Note that you are not allowed to call the
+ // parser from the callback—that will corrupt its internal state.
+ onComment: null,
+ // Nodes have their start and end characters offsets recorded in
+ // `start` and `end` properties (directly on the node, rather than
+ // the `loc` object, which holds line/column data. To also add a
+ // [semi-standardized][range] `range` property holding a `[start,
+ // end]` array with the same numbers, set the `ranges` option to
+ // `true`.
+ //
+ // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
+ ranges: false,
+ // It is possible to parse multiple files into a single AST by
+ // passing the tree produced by parsing the first file as
+ // `program` option in subsequent parses. This will add the
+ // toplevel forms of the parsed file to the `Program` (top) node
+ // of an existing parse tree.
+ program: null,
+ // When `locations` is on, you can pass this to record the source
+ // file in every node's `loc` object.
+ sourceFile: null,
+ // This value, if given, is stored in every node, whether
+ // `locations` is on or off.
+ directSourceFile: null,
+ // When enabled, parenthesized expressions are represented by
+ // (non-standard) ParenthesizedExpression nodes
+ preserveParens: false,
+ plugins: {}
+};
+
+// Interpret and default an options object
+
+function getOptions(opts) {
+ var options = {};
+
+ for (var opt in defaultOptions)
+ options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt];
+
+ if (options.ecmaVersion >= 2015)
+ options.ecmaVersion -= 2009;
+
+ if (options.allowReserved == null)
+ options.allowReserved = options.ecmaVersion < 5;
+
+ if (isArray(options.onToken)) {
+ var tokens = options.onToken;
+ options.onToken = function (token) { return tokens.push(token); };
+ }
+ if (isArray(options.onComment))
+ options.onComment = pushComment(options, options.onComment);
+
+ return options
+}
+
+function pushComment(options, array) {
+ return function (block, text, start, end, startLoc, endLoc) {
+ var comment = {
+ type: block ? 'Block' : 'Line',
+ value: text,
+ start: start,
+ end: end
+ };
+ if (options.locations)
+ comment.loc = new SourceLocation(this, startLoc, endLoc);
+ if (options.ranges)
+ comment.range = [start, end];
+ array.push(comment);
+ }
+}
+
+// Registered plugins
+var plugins = {};
+
+function keywordRegexp(words) {
+ return new RegExp("^(" + words.replace(/ /g, "|") + ")$")
+}
+
+var Parser = function Parser(options, input, startPos) {
+ this.options = options = getOptions(options);
+ this.sourceFile = options.sourceFile;
+ this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]);
+ var reserved = "";
+ if (!options.allowReserved) {
+ for (var v = options.ecmaVersion;; v--)
+ if (reserved = reservedWords[v]) break
+ if (options.sourceType == "module") reserved += " await";
+ }
+ this.reservedWords = keywordRegexp(reserved);
+ var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
+ this.reservedWordsStrict = keywordRegexp(reservedStrict);
+ this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind);
+ this.input = String(input);
+
+ // Used to signal to callers of `readWord1` whether the word
+ // contained any escape sequences. This is needed because words with
+ // escape sequences must not be interpreted as keywords.
+ this.containsEsc = false;
+
+ // Load plugins
+ this.loadPlugins(options.plugins);
+
+ // Set up token state
+
+ // The current position of the tokenizer in the input.
+ if (startPos) {
+ this.pos = startPos;
+ this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
+ this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
+ } else {
+ this.pos = this.lineStart = 0;
+ this.curLine = 1;
+ }
+
+ // Properties of the current token:
+ // Its type
+ this.type = tt.eof;
+ // For tokens that include more information than their type, the value
+ this.value = null;
+ // Its start and end offset
+ this.start = this.end = this.pos;
+ // And, if locations are used, the {line, column} object
+ // corresponding to those offsets
+ this.startLoc = this.endLoc = this.curPosition();
+
+ // Position information for the previous token
+ this.lastTokEndLoc = this.lastTokStartLoc = null;
+ this.lastTokStart = this.lastTokEnd = this.pos;
+
+ // The context stack is used to superficially track syntactic
+ // context to predict whether a regular expression is allowed in a
+ // given position.
+ this.context = this.initialContext();
+ this.exprAllowed = true;
+
+ // Figure out if it's a module code.
+ this.strict = this.inModule = options.sourceType === "module";
+
+ // Used to signify the start of a potential arrow function
+ this.potentialArrowAt = -1;
+
+ // Flags to track whether we are in a function, a generator, an async function.
+ this.inFunction = this.inGenerator = this.inAsync = false;
+ // Positions to delayed-check that yield/await does not exist in default parameters.
+ this.yieldPos = this.awaitPos = 0;
+ // Labels in scope.
+ this.labels = [];
+
+ // If enabled, skip leading hashbang line.
+ if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === '#!')
+ this.skipLineComment(2);
+};
+
+// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them
+Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) };
+Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) };
+
+Parser.prototype.extend = function extend (name, f) {
+ this[name] = f(this[name]);
+};
+
+Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
+ var this$1 = this;
+
+ for (var name in pluginConfigs) {
+ var plugin = plugins[name];
+ if (!plugin) throw new Error("Plugin '" + name + "' not found")
+ plugin(this$1, pluginConfigs[name]);
+ }
+};
+
+Parser.prototype.parse = function parse$1 () {
+ var node = this.options.program || this.startNode();
+ this.nextToken();
+ return this.parseTopLevel(node)
+};
+
+var pp = Parser.prototype;
+
+// ## Parser utilities
+
+// Test whether a statement node is the string literal `"use strict"`.
+
+pp.isUseStrict = function(stmt) {
+ return this.options.ecmaVersion >= 5 && stmt.type === "ExpressionStatement" &&
+ stmt.expression.type === "Literal" &&
+ stmt.expression.raw.slice(1, -1) === "use strict"
+};
+
+// Predicate that tests whether the next token is of the given
+// type, and if yes, consumes it as a side effect.
+
+pp.eat = function(type) {
+ if (this.type === type) {
+ this.next();
+ return true
+ } else {
+ return false
+ }
+};
+
+// Tests whether parsed token is a contextual keyword.
+
+pp.isContextual = function(name) {
+ return this.type === tt.name && this.value === name
+};
+
+// Consumes contextual keyword if possible.
+
+pp.eatContextual = function(name) {
+ return this.value === name && this.eat(tt.name)
+};
+
+// Asserts that following token is given contextual keyword.
+
+pp.expectContextual = function(name) {
+ if (!this.eatContextual(name)) this.unexpected();
+};
+
+// Test whether a semicolon can be inserted at the current position.
+
+pp.canInsertSemicolon = function() {
+ return this.type === tt.eof ||
+ this.type === tt.braceR ||
+ lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+};
+
+pp.insertSemicolon = function() {
+ if (this.canInsertSemicolon()) {
+ if (this.options.onInsertedSemicolon)
+ this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc);
+ return true
+ }
+};
+
+// Consume a semicolon, or, failing that, see if we are allowed to
+// pretend that there is a semicolon at this position.
+
+pp.semicolon = function() {
+ if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected();
+};
+
+pp.afterTrailingComma = function(tokType, notNext) {
+ if (this.type == tokType) {
+ if (this.options.onTrailingComma)
+ this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc);
+ if (!notNext)
+ this.next();
+ return true
+ }
+};
+
+// Expect a token of a given type. If found, consume it, otherwise,
+// raise an unexpected token error.
+
+pp.expect = function(type) {
+ this.eat(type) || this.unexpected();
+};
+
+// Raise an unexpected token error.
+
+pp.unexpected = function(pos) {
+ this.raise(pos != null ? pos : this.start, "Unexpected token");
+};
+
+var DestructuringErrors = function DestructuringErrors() {
+ this.shorthandAssign = 0;
+ this.trailingComma = 0;
+};
+
+pp.checkPatternErrors = function(refDestructuringErrors, andThrow) {
+ var trailing = refDestructuringErrors && refDestructuringErrors.trailingComma;
+ if (!andThrow) return !!trailing
+ if (trailing) this.raise(trailing, "Comma is not permitted after the rest element");
+};
+
+pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
+ var pos = refDestructuringErrors && refDestructuringErrors.shorthandAssign;
+ if (!andThrow) return !!pos
+ if (pos) this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns");
+};
+
+pp.checkYieldAwaitInDefaultParams = function() {
+ if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
+ this.raise(this.yieldPos, "Yield expression cannot be a default value");
+ if (this.awaitPos)
+ this.raise(this.awaitPos, "Await expression cannot be a default value");
+};
+
+var pp$1 = Parser.prototype;
+
+// ### Statement parsing
+
+// Parse a program. Initializes the parser, reads any number of
+// statements, and wraps them in a Program node. Optionally takes a
+// `program` argument. If present, the statements will be appended
+// to its body instead of creating a new node.
+
+pp$1.parseTopLevel = function(node) {
+ var this$1 = this;
+
+ var first = true, exports = {};
+ if (!node.body) node.body = [];
+ while (this.type !== tt.eof) {
+ var stmt = this$1.parseStatement(true, true, exports);
+ node.body.push(stmt);
+ if (first) {
+ if (this$1.isUseStrict(stmt)) this$1.setStrict(true);
+ first = false;
+ }
+ }
+ this.next();
+ if (this.options.ecmaVersion >= 6) {
+ node.sourceType = this.options.sourceType;
+ }
+ return this.finishNode(node, "Program")
+};
+
+var loopLabel = {kind: "loop"};
+var switchLabel = {kind: "switch"};
+pp$1.isLet = function() {
+ if (this.type !== tt.name || this.options.ecmaVersion < 6 || this.value != "let") return false
+ skipWhiteSpace.lastIndex = this.pos;
+ var skip = skipWhiteSpace.exec(this.input);
+ var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
+ if (nextCh === 91 || nextCh == 123) return true // '{' and '['
+ if (isIdentifierStart(nextCh, true)) {
+ for (var pos = next + 1; isIdentifierChar(this.input.charCodeAt(pos), true); ++pos) {}
+ var ident = this.input.slice(next, pos);
+ if (!this.isKeyword(ident)) return true
+ }
+ return false
+};
+
+// check 'async [no LineTerminator here] function'
+// - 'async /*foo*/ function' is OK.
+// - 'async /*\n*/ function' is invalid.
+pp$1.isAsyncFunction = function() {
+ if (this.type !== tt.name || this.options.ecmaVersion < 8 || this.value != "async")
+ return false
+
+ skipWhiteSpace.lastIndex = this.pos;
+ var skip = skipWhiteSpace.exec(this.input);
+ var next = this.pos + skip[0].length;
+ return !lineBreak.test(this.input.slice(this.pos, next)) &&
+ this.input.slice(next, next + 8) === "function" &&
+ (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
+};
+
+// Parse a single statement.
+//
+// If expecting a statement and finding a slash operator, parse a
+// regular expression literal. This is to handle cases like
+// `if (foo) /blah/.exec(foo)`, where looking at the previous token
+// does not help.
+
+pp$1.parseStatement = function(declaration, topLevel, exports) {
+ var starttype = this.type, node = this.startNode(), kind;
+
+ if (this.isLet()) {
+ starttype = tt._var;
+ kind = "let";
+ }
+
+ // Most types of statements are recognized by the keyword they
+ // start with. Many are trivial to parse, some require a bit of
+ // complexity.
+
+ switch (starttype) {
+ case tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
+ case tt._debugger: return this.parseDebuggerStatement(node)
+ case tt._do: return this.parseDoStatement(node)
+ case tt._for: return this.parseForStatement(node)
+ case tt._function:
+ if (!declaration && this.options.ecmaVersion >= 6) this.unexpected();
+ return this.parseFunctionStatement(node, false)
+ case tt._class:
+ if (!declaration) this.unexpected();
+ return this.parseClass(node, true)
+ case tt._if: return this.parseIfStatement(node)
+ case tt._return: return this.parseReturnStatement(node)
+ case tt._switch: return this.parseSwitchStatement(node)
+ case tt._throw: return this.parseThrowStatement(node)
+ case tt._try: return this.parseTryStatement(node)
+ case tt._const: case tt._var:
+ kind = kind || this.value;
+ if (!declaration && kind != "var") this.unexpected();
+ return this.parseVarStatement(node, kind)
+ case tt._while: return this.parseWhileStatement(node)
+ case tt._with: return this.parseWithStatement(node)
+ case tt.braceL: return this.parseBlock()
+ case tt.semi: return this.parseEmptyStatement(node)
+ case tt._export:
+ case tt._import:
+ if (!this.options.allowImportExportEverywhere) {
+ if (!topLevel)
+ this.raise(this.start, "'import' and 'export' may only appear at the top level");
+ if (!this.inModule)
+ this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'");
+ }
+ return starttype === tt._import ? this.parseImport(node) : this.parseExport(node, exports)
+
+ // If the statement does not start with a statement keyword or a
+ // brace, it's an ExpressionStatement or LabeledStatement. We
+ // simply start parsing an expression, and afterwards, if the
+ // next token is a colon and the expression was a simple
+ // Identifier node, we switch to interpreting it as a label.
+ default:
+ if (this.isAsyncFunction() && declaration) {
+ this.next();
+ return this.parseFunctionStatement(node, true)
+ }
+
+ var maybeName = this.value, expr = this.parseExpression();
+ if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
+ return this.parseLabeledStatement(node, maybeName, expr)
+ else return this.parseExpressionStatement(node, expr)
+ }
+};
+
+pp$1.parseBreakContinueStatement = function(node, keyword) {
+ var this$1 = this;
+
+ var isBreak = keyword == "break";
+ this.next();
+ if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null;
+ else if (this.type !== tt.name) this.unexpected();
+ else {
+ node.label = this.parseIdent();
+ this.semicolon();
+ }
+
+ // Verify that there is an actual destination to break or
+ // continue to.
+ for (var i = 0; i < this.labels.length; ++i) {
+ var lab = this$1.labels[i];
+ if (node.label == null || lab.name === node.label.name) {
+ if (lab.kind != null && (isBreak || lab.kind === "loop")) break
+ if (node.label && isBreak) break
+ }
+ }
+ if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword);
+ return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
+};
+
+pp$1.parseDebuggerStatement = function(node) {
+ this.next();
+ this.semicolon();
+ return this.finishNode(node, "DebuggerStatement")
+};
+
+pp$1.parseDoStatement = function(node) {
+ this.next();
+ this.labels.push(loopLabel);
+ node.body = this.parseStatement(false);
+ this.labels.pop();
+ this.expect(tt._while);
+ node.test = this.parseParenExpression();
+ if (this.options.ecmaVersion >= 6)
+ this.eat(tt.semi);
+ else
+ this.semicolon();
+ return this.finishNode(node, "DoWhileStatement")
+};
+
+// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
+// loop is non-trivial. Basically, we have to parse the init `var`
+// statement or expression, disallowing the `in` operator (see
+// the second parameter to `parseExpression`), and then check
+// whether the next token is `in` or `of`. When there is no init
+// part (semicolon immediately after the opening parenthesis), it
+// is a regular `for` loop.
+
+pp$1.parseForStatement = function(node) {
+ this.next();
+ this.labels.push(loopLabel);
+ this.expect(tt.parenL);
+ if (this.type === tt.semi) return this.parseFor(node, null)
+ var isLet = this.isLet();
+ if (this.type === tt._var || this.type === tt._const || isLet) {
+ var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
+ this.next();
+ this.parseVar(init$1, true, kind);
+ this.finishNode(init$1, "VariableDeclaration");
+ if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
+ !(kind !== "var" && init$1.declarations[0].init))
+ return this.parseForIn(node, init$1)
+ return this.parseFor(node, init$1)
+ }
+ var refDestructuringErrors = new DestructuringErrors;
+ var init = this.parseExpression(true, refDestructuringErrors);
+ if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
+ this.checkPatternErrors(refDestructuringErrors, true);
+ this.toAssignable(init);
+ this.checkLVal(init);
+ return this.parseForIn(node, init)
+ } else {
+ this.checkExpressionErrors(refDestructuringErrors, true);
+ }
+ return this.parseFor(node, init)
+};
+
+pp$1.parseFunctionStatement = function(node, isAsync) {
+ this.next();
+ return this.parseFunction(node, true, false, isAsync)
+};
+
+pp$1.isFunction = function() {
+ return this.type === tt._function || this.isAsyncFunction()
+};
+
+pp$1.parseIfStatement = function(node) {
+ this.next();
+ node.test = this.parseParenExpression();
+ // allow function declarations in branches, but only in non-strict mode
+ node.consequent = this.parseStatement(!this.strict && this.isFunction());
+ node.alternate = this.eat(tt._else) ? this.parseStatement(!this.strict && this.isFunction()) : null;
+ return this.finishNode(node, "IfStatement")
+};
+
+pp$1.parseReturnStatement = function(node) {
+ if (!this.inFunction && !this.options.allowReturnOutsideFunction)
+ this.raise(this.start, "'return' outside of function");
+ this.next();
+
+ // In `return` (and `break`/`continue`), the keywords with
+ // optional arguments, we eagerly look for a semicolon or the
+ // possibility to insert one.
+
+ if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null;
+ else { node.argument = this.parseExpression(); this.semicolon(); }
+ return this.finishNode(node, "ReturnStatement")
+};
+
+pp$1.parseSwitchStatement = function(node) {
+ var this$1 = this;
+
+ this.next();
+ node.discriminant = this.parseParenExpression();
+ node.cases = [];
+ this.expect(tt.braceL);
+ this.labels.push(switchLabel);
+
+ // Statements under must be grouped (by label) in SwitchCase
+ // nodes. `cur` is used to keep the node that we are currently
+ // adding statements to.
+
+ for (var cur, sawDefault = false; this.type != tt.braceR;) {
+ if (this$1.type === tt._case || this$1.type === tt._default) {
+ var isCase = this$1.type === tt._case;
+ if (cur) this$1.finishNode(cur, "SwitchCase");
+ node.cases.push(cur = this$1.startNode());
+ cur.consequent = [];
+ this$1.next();
+ if (isCase) {
+ cur.test = this$1.parseExpression();
+ } else {
+ if (sawDefault) this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses");
+ sawDefault = true;
+ cur.test = null;
+ }
+ this$1.expect(tt.colon);
+ } else {
+ if (!cur) this$1.unexpected();
+ cur.consequent.push(this$1.parseStatement(true));
+ }
+ }
+ if (cur) this.finishNode(cur, "SwitchCase");
+ this.next(); // Closing brace
+ this.labels.pop();
+ return this.finishNode(node, "SwitchStatement")
+};
+
+pp$1.parseThrowStatement = function(node) {
+ this.next();
+ if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
+ this.raise(this.lastTokEnd, "Illegal newline after throw");
+ node.argument = this.parseExpression();
+ this.semicolon();
+ return this.finishNode(node, "ThrowStatement")
+};
+
+// Reused empty array added for node fields that are always empty.
+
+var empty = [];
+
+pp$1.parseTryStatement = function(node) {
+ this.next();
+ node.block = this.parseBlock();
+ node.handler = null;
+ if (this.type === tt._catch) {
+ var clause = this.startNode();
+ this.next();
+ this.expect(tt.parenL);
+ clause.param = this.parseBindingAtom();
+ this.checkLVal(clause.param, true);
+ this.expect(tt.parenR);
+ clause.body = this.parseBlock();
+ node.handler = this.finishNode(clause, "CatchClause");
+ }
+ node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null;
+ if (!node.handler && !node.finalizer)
+ this.raise(node.start, "Missing catch or finally clause");
+ return this.finishNode(node, "TryStatement")
+};
+
+pp$1.parseVarStatement = function(node, kind) {
+ this.next();
+ this.parseVar(node, false, kind);
+ this.semicolon();
+ return this.finishNode(node, "VariableDeclaration")
+};
+
+pp$1.parseWhileStatement = function(node) {
+ this.next();
+ node.test = this.parseParenExpression();
+ this.labels.push(loopLabel);
+ node.body = this.parseStatement(false);
+ this.labels.pop();
+ return this.finishNode(node, "WhileStatement")
+};
+
+pp$1.parseWithStatement = function(node) {
+ if (this.strict) this.raise(this.start, "'with' in strict mode");
+ this.next();
+ node.object = this.parseParenExpression();
+ node.body = this.parseStatement(false);
+ return this.finishNode(node, "WithStatement")
+};
+
+pp$1.parseEmptyStatement = function(node) {
+ this.next();
+ return this.finishNode(node, "EmptyStatement")
+};
+
+pp$1.parseLabeledStatement = function(node, maybeName, expr) {
+ var this$1 = this;
+
+ for (var i = 0; i < this.labels.length; ++i)
+ if (this$1.labels[i].name === maybeName) this$1.raise(expr.start, "Label '" + maybeName + "' is already declared");
+ var kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null;
+ for (var i$1 = this.labels.length - 1; i$1 >= 0; i$1--) {
+ var label = this$1.labels[i$1];
+ if (label.statementStart == node.start) {
+ label.statementStart = this$1.start;
+ label.kind = kind;
+ } else break
+ }
+ this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
+ node.body = this.parseStatement(true);
+ this.labels.pop();
+ node.label = expr;
+ return this.finishNode(node, "LabeledStatement")
+};
+
+pp$1.parseExpressionStatement = function(node, expr) {
+ node.expression = expr;
+ this.semicolon();
+ return this.finishNode(node, "ExpressionStatement")
+};
+
+// Parse a semicolon-enclosed block of statements, handling `"use
+// strict"` declarations when `allowStrict` is true (used for
+// function bodies).
+
+pp$1.parseBlock = function(allowStrict) {
+ var this$1 = this;
+
+ var node = this.startNode(), first = true, oldStrict;
+ node.body = [];
+ this.expect(tt.braceL);
+ while (!this.eat(tt.braceR)) {
+ var stmt = this$1.parseStatement(true);
+ node.body.push(stmt);
+ if (first && allowStrict && this$1.isUseStrict(stmt)) {
+ oldStrict = this$1.strict;
+ this$1.setStrict(this$1.strict = true);
+ }
+ first = false;
+ }
+ if (oldStrict === false) this.setStrict(false);
+ return this.finishNode(node, "BlockStatement")
+};
+
+// Parse a regular `for` loop. The disambiguation code in
+// `parseStatement` will already have parsed the init statement or
+// expression.
+
+pp$1.parseFor = function(node, init) {
+ node.init = init;
+ this.expect(tt.semi);
+ node.test = this.type === tt.semi ? null : this.parseExpression();
+ this.expect(tt.semi);
+ node.update = this.type === tt.parenR ? null : this.parseExpression();
+ this.expect(tt.parenR);
+ node.body = this.parseStatement(false);
+ this.labels.pop();
+ return this.finishNode(node, "ForStatement")
+};
+
+// Parse a `for`/`in` and `for`/`of` loop, which are almost
+// same from parser's perspective.
+
+pp$1.parseForIn = function(node, init) {
+ var type = this.type === tt._in ? "ForInStatement" : "ForOfStatement";
+ this.next();
+ node.left = init;
+ node.right = this.parseExpression();
+ this.expect(tt.parenR);
+ node.body = this.parseStatement(false);
+ this.labels.pop();
+ return this.finishNode(node, type)
+};
+
+// Parse a list of variable declarations.
+
+pp$1.parseVar = function(node, isFor, kind) {
+ var this$1 = this;
+
+ node.declarations = [];
+ node.kind = kind;
+ for (;;) {
+ var decl = this$1.startNode();
+ this$1.parseVarId(decl);
+ if (this$1.eat(tt.eq)) {
+ decl.init = this$1.parseMaybeAssign(isFor);
+ } else if (kind === "const" && !(this$1.type === tt._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
+ this$1.unexpected();
+ } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === tt._in || this$1.isContextual("of")))) {
+ this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value");
+ } else {
+ decl.init = null;
+ }
+ node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
+ if (!this$1.eat(tt.comma)) break
+ }
+ return node
+};
+
+pp$1.parseVarId = function(decl) {
+ decl.id = this.parseBindingAtom();
+ this.checkLVal(decl.id, true);
+};
+
+// Parse a function declaration or literal (depending on the
+// `isStatement` parameter).
+
+pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
+ this.initFunction(node);
+ if (this.options.ecmaVersion >= 6 && !isAsync)
+ node.generator = this.eat(tt.star);
+ if (this.options.ecmaVersion >= 8)
+ node.async = !!isAsync;
+
+ if (isStatement)
+ node.id = this.parseIdent();
+
+ var oldInGen = this.inGenerator, oldInAsync = this.inAsync, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos;
+ this.inGenerator = node.generator;
+ this.inAsync = node.async;
+ this.yieldPos = 0;
+ this.awaitPos = 0;
+
+ if (!isStatement && this.type === tt.name)
+ node.id = this.parseIdent();
+ this.parseFunctionParams(node);
+ this.parseFunctionBody(node, allowExpressionBody);
+
+ this.inGenerator = oldInGen;
+ this.inAsync = oldInAsync;
+ this.yieldPos = oldYieldPos;
+ this.awaitPos = oldAwaitPos;
+ return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
+};
+
+pp$1.parseFunctionParams = function(node) {
+ this.expect(tt.parenL);
+ node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8, true);
+ this.checkYieldAwaitInDefaultParams();
+};
+
+// Parse a class declaration or literal (depending on the
+// `isStatement` parameter).
+
+pp$1.parseClass = function(node, isStatement) {
+ var this$1 = this;
+
+ this.next();
+ this.parseClassId(node, isStatement);
+ this.parseClassSuper(node);
+ var classBody = this.startNode();
+ var hadConstructor = false;
+ classBody.body = [];
+ this.expect(tt.braceL);
+ while (!this.eat(tt.braceR)) {
+ if (this$1.eat(tt.semi)) continue
+ var method = this$1.startNode();
+ var isGenerator = this$1.eat(tt.star);
+ var isAsync = false;
+ var isMaybeStatic = this$1.type === tt.name && this$1.value === "static";
+ this$1.parsePropertyName(method);
+ method.static = isMaybeStatic && this$1.type !== tt.parenL;
+ if (method.static) {
+ if (isGenerator) this$1.unexpected();
+ isGenerator = this$1.eat(tt.star);
+ this$1.parsePropertyName(method);
+ }
+ if (this$1.options.ecmaVersion >= 8 && !isGenerator && !method.computed &&
+ method.key.type === "Identifier" && method.key.name === "async" && this$1.type !== tt.parenL &&
+ !this$1.canInsertSemicolon()) {
+ isAsync = true;
+ this$1.parsePropertyName(method);
+ }
+ method.kind = "method";
+ var isGetSet = false;
+ if (!method.computed) {
+ var key = method.key;
+ if (!isGenerator && !isAsync && key.type === "Identifier" && this$1.type !== tt.parenL && (key.name === "get" || key.name === "set")) {
+ isGetSet = true;
+ method.kind = key.name;
+ key = this$1.parsePropertyName(method);
+ }
+ if (!method.static && (key.type === "Identifier" && key.name === "constructor" ||
+ key.type === "Literal" && key.value === "constructor")) {
+ if (hadConstructor) this$1.raise(key.start, "Duplicate constructor in the same class");
+ if (isGetSet) this$1.raise(key.start, "Constructor can't have get/set modifier");
+ if (isGenerator) this$1.raise(key.start, "Constructor can't be a generator");
+ if (isAsync) this$1.raise(key.start, "Constructor can't be an async method");
+ method.kind = "constructor";
+ hadConstructor = true;
+ }
+ }
+ this$1.parseClassMethod(classBody, method, isGenerator, isAsync);
+ if (isGetSet) {
+ var paramCount = method.kind === "get" ? 0 : 1;
+ if (method.value.params.length !== paramCount) {
+ var start = method.value.start;
+ if (method.kind === "get")
+ this$1.raiseRecoverable(start, "getter should have no params");
+ else
+ this$1.raiseRecoverable(start, "setter should have exactly one param");
+ } else {
+ if (method.kind === "set" && method.value.params[0].type === "RestElement")
+ this$1.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params");
+ }
+ }
+ }
+ node.body = this.finishNode(classBody, "ClassBody");
+ return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
+};
+
+pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
+ method.value = this.parseMethod(isGenerator, isAsync);
+ classBody.body.push(this.finishNode(method, "MethodDefinition"));
+};
+
+pp$1.parseClassId = function(node, isStatement) {
+ node.id = this.type === tt.name ? this.parseIdent() : isStatement ? this.unexpected() : null;
+};
+
+pp$1.parseClassSuper = function(node) {
+ node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null;
+};
+
+// Parses module export declaration.
+
+pp$1.parseExport = function(node, exports) {
+ var this$1 = this;
+
+ this.next();
+ // export * from '...'
+ if (this.eat(tt.star)) {
+ this.expectContextual("from");
+ node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
+ this.semicolon();
+ return this.finishNode(node, "ExportAllDeclaration")
+ }
+ if (this.eat(tt._default)) { // export default ...
+ this.checkExport(exports, "default", this.lastTokStart);
+ var parens = this.type == tt.parenL;
+ var expr = this.parseMaybeAssign();
+ var needsSemi = true;
+ if (!parens && (expr.type == "FunctionExpression" ||
+ expr.type == "ClassExpression")) {
+ needsSemi = false;
+ if (expr.id) {
+ expr.type = expr.type == "FunctionExpression"
+ ? "FunctionDeclaration"
+ : "ClassDeclaration";
+ }
+ }
+ node.declaration = expr;
+ if (needsSemi) this.semicolon();
+ return this.finishNode(node, "ExportDefaultDeclaration")
+ }
+ // export var|const|let|function|class ...
+ if (this.shouldParseExportStatement()) {
+ node.declaration = this.parseStatement(true);
+ if (node.declaration.type === "VariableDeclaration")
+ this.checkVariableExport(exports, node.declaration.declarations);
+ else
+ this.checkExport(exports, node.declaration.id.name, node.declaration.id.start);
+ node.specifiers = [];
+ node.source = null;
+ } else { // export { x, y as z } [from '...']
+ node.declaration = null;
+ node.specifiers = this.parseExportSpecifiers(exports);
+ if (this.eatContextual("from")) {
+ node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
+ } else {
+ // check for keywords used as local names
+ for (var i = 0; i < node.specifiers.length; i++) {
+ if (this$1.keywords.test(node.specifiers[i].local.name) || this$1.reservedWords.test(node.specifiers[i].local.name)) {
+ this$1.unexpected(node.specifiers[i].local.start);
+ }
+ }
+
+ node.source = null;
+ }
+ this.semicolon();
+ }
+ return this.finishNode(node, "ExportNamedDeclaration")
+};
+
+pp$1.checkExport = function(exports, name, pos) {
+ if (!exports) return
+ if (Object.prototype.hasOwnProperty.call(exports, name))
+ this.raiseRecoverable(pos, "Duplicate export '" + name + "'");
+ exports[name] = true;
+};
+
+pp$1.checkPatternExport = function(exports, pat) {
+ var this$1 = this;
+
+ var type = pat.type;
+ if (type == "Identifier")
+ this.checkExport(exports, pat.name, pat.start);
+ else if (type == "ObjectPattern")
+ for (var i = 0; i < pat.properties.length; ++i)
+ this$1.checkPatternExport(exports, pat.properties[i].value);
+ else if (type == "ArrayPattern")
+ for (var i$1 = 0; i$1 < pat.elements.length; ++i$1) {
+ var elt = pat.elements[i$1];
+ if (elt) this$1.checkPatternExport(exports, elt);
+ }
+ else if (type == "AssignmentPattern")
+ this.checkPatternExport(exports, pat.left);
+ else if (type == "ParenthesizedExpression")
+ this.checkPatternExport(exports, pat.expression);
+};
+
+pp$1.checkVariableExport = function(exports, decls) {
+ var this$1 = this;
+
+ if (!exports) return
+ for (var i = 0; i < decls.length; i++)
+ this$1.checkPatternExport(exports, decls[i].id);
+};
+
+pp$1.shouldParseExportStatement = function() {
+ return this.type.keyword || this.isLet() || this.isAsyncFunction()
+};
+
+// Parses a comma-separated list of module exports.
+
+pp$1.parseExportSpecifiers = function(exports) {
+ var this$1 = this;
+
+ var nodes = [], first = true;
+ // export { x, y as z } [from '...']
+ this.expect(tt.braceL);
+ while (!this.eat(tt.braceR)) {
+ if (!first) {
+ this$1.expect(tt.comma);
+ if (this$1.afterTrailingComma(tt.braceR)) break
+ } else first = false;
+
+ var node = this$1.startNode();
+ node.local = this$1.parseIdent(this$1.type === tt._default);
+ node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local;
+ this$1.checkExport(exports, node.exported.name, node.exported.start);
+ nodes.push(this$1.finishNode(node, "ExportSpecifier"));
+ }
+ return nodes
+};
+
+// Parses import declaration.
+
+pp$1.parseImport = function(node) {
+ this.next();
+ // import '...'
+ if (this.type === tt.string) {
+ node.specifiers = empty;
+ node.source = this.parseExprAtom();
+ } else {
+ node.specifiers = this.parseImportSpecifiers();
+ this.expectContextual("from");
+ node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
+ }
+ this.semicolon();
+ return this.finishNode(node, "ImportDeclaration")
+};
+
+// Parses a comma-separated list of module imports.
+
+pp$1.parseImportSpecifiers = function() {
+ var this$1 = this;
+
+ var nodes = [], first = true;
+ if (this.type === tt.name) {
+ // import defaultObj, { x, y as z } from '...'
+ var node = this.startNode();
+ node.local = this.parseIdent();
+ this.checkLVal(node.local, true);
+ nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
+ if (!this.eat(tt.comma)) return nodes
+ }
+ if (this.type === tt.star) {
+ var node$1 = this.startNode();
+ this.next();
+ this.expectContextual("as");
+ node$1.local = this.parseIdent();
+ this.checkLVal(node$1.local, true);
+ nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
+ return nodes
+ }
+ this.expect(tt.braceL);
+ while (!this.eat(tt.braceR)) {
+ if (!first) {
+ this$1.expect(tt.comma);
+ if (this$1.afterTrailingComma(tt.braceR)) break
+ } else first = false;
+
+ var node$2 = this$1.startNode();
+ node$2.imported = this$1.parseIdent(true);
+ if (this$1.eatContextual("as")) {
+ node$2.local = this$1.parseIdent();
+ } else {
+ node$2.local = node$2.imported;
+ if (this$1.isKeyword(node$2.local.name)) this$1.unexpected(node$2.local.start);
+ if (this$1.reservedWordsStrict.test(node$2.local.name)) this$1.raiseRecoverable(node$2.local.start, "The keyword '" + node$2.local.name + "' is reserved");
+ }
+ this$1.checkLVal(node$2.local, true);
+ nodes.push(this$1.finishNode(node$2, "ImportSpecifier"));
+ }
+ return nodes
+};
+
+var pp$2 = Parser.prototype;
+
+// Convert existing expression atom to assignable pattern
+// if possible.
+
+pp$2.toAssignable = function(node, isBinding) {
+ var this$1 = this;
+
+ if (this.options.ecmaVersion >= 6 && node) {
+ switch (node.type) {
+ case "Identifier":
+ if (this.inAsync && node.name === "await")
+ this.raise(node.start, "Can not use 'await' as identifier inside an async function");
+ break
+
+ case "ObjectPattern":
+ case "ArrayPattern":
+ break
+
+ case "ObjectExpression":
+ node.type = "ObjectPattern";
+ for (var i = 0; i < node.properties.length; i++) {
+ var prop = node.properties[i];
+ if (prop.kind !== "init") this$1.raise(prop.key.start, "Object pattern can't contain getter or setter");
+ this$1.toAssignable(prop.value, isBinding);
+ }
+ break
+
+ case "ArrayExpression":
+ node.type = "ArrayPattern";
+ this.toAssignableList(node.elements, isBinding);
+ break
+
+ case "AssignmentExpression":
+ if (node.operator === "=") {
+ node.type = "AssignmentPattern";
+ delete node.operator;
+ this.toAssignable(node.left, isBinding);
+ // falls through to AssignmentPattern
+ } else {
+ this.raise(node.left.end, "Only '=' operator can be used for specifying default value.");
+ break
+ }
+
+ case "AssignmentPattern":
+ break
+
+ case "ParenthesizedExpression":
+ node.expression = this.toAssignable(node.expression, isBinding);
+ break
+
+ case "MemberExpression":
+ if (!isBinding) break
+
+ default:
+ this.raise(node.start, "Assigning to rvalue");
+ }
+ }
+ return node
+};
+
+// Convert list of expression atoms to binding list.
+
+pp$2.toAssignableList = function(exprList, isBinding) {
+ var this$1 = this;
+
+ var end = exprList.length;
+ if (end) {
+ var last = exprList[end - 1];
+ if (last && last.type == "RestElement") {
+ --end;
+ } else if (last && last.type == "SpreadElement") {
+ last.type = "RestElement";
+ var arg = last.argument;
+ this.toAssignable(arg, isBinding);
+ if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern")
+ this.unexpected(arg.start);
+ --end;
+ }
+
+ if (isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
+ this.unexpected(last.argument.start);
+ }
+ for (var i = 0; i < end; i++) {
+ var elt = exprList[i];
+ if (elt) this$1.toAssignable(elt, isBinding);
+ }
+ return exprList
+};
+
+// Parses spread element.
+
+pp$2.parseSpread = function(refDestructuringErrors) {
+ var node = this.startNode();
+ this.next();
+ node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
+ return this.finishNode(node, "SpreadElement")
+};
+
+pp$2.parseRest = function(allowNonIdent) {
+ var node = this.startNode();
+ this.next();
+
+ // RestElement inside of a function parameter must be an identifier
+ if (allowNonIdent) node.argument = this.type === tt.name ? this.parseIdent() : this.unexpected();
+ else node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected();
+
+ return this.finishNode(node, "RestElement")
+};
+
+// Parses lvalue (assignable) atom.
+
+pp$2.parseBindingAtom = function() {
+ if (this.options.ecmaVersion < 6) return this.parseIdent()
+ switch (this.type) {
+ case tt.name:
+ return this.parseIdent()
+
+ case tt.bracketL:
+ var node = this.startNode();
+ this.next();
+ node.elements = this.parseBindingList(tt.bracketR, true, true);
+ return this.finishNode(node, "ArrayPattern")
+
+ case tt.braceL:
+ return this.parseObj(true)
+
+ default:
+ this.unexpected();
+ }
+};
+
+pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma, allowNonIdent) {
+ var this$1 = this;
+
+ var elts = [], first = true;
+ while (!this.eat(close)) {
+ if (first) first = false;
+ else this$1.expect(tt.comma);
+ if (allowEmpty && this$1.type === tt.comma) {
+ elts.push(null);
+ } else if (allowTrailingComma && this$1.afterTrailingComma(close)) {
+ break
+ } else if (this$1.type === tt.ellipsis) {
+ var rest = this$1.parseRest(allowNonIdent);
+ this$1.parseBindingListItem(rest);
+ elts.push(rest);
+ if (this$1.type === tt.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element");
+ this$1.expect(close);
+ break
+ } else {
+ var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc);
+ this$1.parseBindingListItem(elem);
+ elts.push(elem);
+ }
+ }
+ return elts
+};
+
+pp$2.parseBindingListItem = function(param) {
+ return param
+};
+
+// Parses assignment pattern around given atom if possible.
+
+pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
+ left = left || this.parseBindingAtom();
+ if (this.options.ecmaVersion < 6 || !this.eat(tt.eq)) return left
+ var node = this.startNodeAt(startPos, startLoc);
+ node.left = left;
+ node.right = this.parseMaybeAssign();
+ return this.finishNode(node, "AssignmentPattern")
+};
+
+// Verify that a node is an lval — something that can be assigned
+// to.
+
+pp$2.checkLVal = function(expr, isBinding, checkClashes) {
+ var this$1 = this;
+
+ switch (expr.type) {
+ case "Identifier":
+ if (this.strict && this.reservedWordsStrictBind.test(expr.name))
+ this.raiseRecoverable(expr.start, (isBinding ? "Binding " : "Assigning to ") + expr.name + " in strict mode");
+ if (checkClashes) {
+ if (has(checkClashes, expr.name))
+ this.raiseRecoverable(expr.start, "Argument name clash");
+ checkClashes[expr.name] = true;
+ }
+ break
+
+ case "MemberExpression":
+ if (isBinding) this.raiseRecoverable(expr.start, (isBinding ? "Binding" : "Assigning to") + " member expression");
+ break
+
+ case "ObjectPattern":
+ for (var i = 0; i < expr.properties.length; i++)
+ this$1.checkLVal(expr.properties[i].value, isBinding, checkClashes);
+ break
+
+ case "ArrayPattern":
+ for (var i$1 = 0; i$1 < expr.elements.length; i$1++) {
+ var elem = expr.elements[i$1];
+ if (elem) this$1.checkLVal(elem, isBinding, checkClashes);
+ }
+ break
+
+ case "AssignmentPattern":
+ this.checkLVal(expr.left, isBinding, checkClashes);
+ break
+
+ case "RestElement":
+ this.checkLVal(expr.argument, isBinding, checkClashes);
+ break
+
+ case "ParenthesizedExpression":
+ this.checkLVal(expr.expression, isBinding, checkClashes);
+ break
+
+ default:
+ this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " rvalue");
+ }
+};
+
+var pp$3 = Parser.prototype;
+
+// Check if property name clashes with already added.
+// Object/class getters and setters are not allowed to clash —
+// either with each other or with an init property — and in
+// strict mode, init properties are also not allowed to be repeated.
+
+pp$3.checkPropClash = function(prop, propHash) {
+ if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
+ return
+ var key = prop.key;
+ var name;
+ switch (key.type) {
+ case "Identifier": name = key.name; break
+ case "Literal": name = String(key.value); break
+ default: return
+ }
+ var kind = prop.kind;
+ if (this.options.ecmaVersion >= 6) {
+ if (name === "__proto__" && kind === "init") {
+ if (propHash.proto) this.raiseRecoverable(key.start, "Redefinition of __proto__ property");
+ propHash.proto = true;
+ }
+ return
+ }
+ name = "$" + name;
+ var other = propHash[name];
+ if (other) {
+ var isGetSet = kind !== "init";
+ if ((this.strict || isGetSet) && other[kind] || !(isGetSet ^ other.init))
+ this.raiseRecoverable(key.start, "Redefinition of property");
+ } else {
+ other = propHash[name] = {
+ init: false,
+ get: false,
+ set: false
+ };
+ }
+ other[kind] = true;
+};
+
+// ### Expression parsing
+
+// These nest, from the most general expression type at the top to
+// 'atomic', nondivisible expression types at the bottom. Most of
+// the functions will simply let the function(s) below them parse,
+// and, *if* the syntactic construct they handle is present, wrap
+// the AST node that the inner parser gave them in another node.
+
+// Parse a full expression. The optional arguments are used to
+// forbid the `in` operator (in for loops initalization expressions)
+// and provide reference for storing '=' operator inside shorthand
+// property assignment in contexts where both object expression
+// and object pattern might appear (so it's possible to raise
+// delayed syntax error at correct position).
+
+pp$3.parseExpression = function(noIn, refDestructuringErrors) {
+ var this$1 = this;
+
+ var startPos = this.start, startLoc = this.startLoc;
+ var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
+ if (this.type === tt.comma) {
+ var node = this.startNodeAt(startPos, startLoc);
+ node.expressions = [expr];
+ while (this.eat(tt.comma)) node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors));
+ return this.finishNode(node, "SequenceExpression")
+ }
+ return expr
+};
+
+// Parse an assignment expression. This includes applications of
+// operators like `+=`.
+
+pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
+ if (this.inGenerator && this.isContextual("yield")) return this.parseYield()
+
+ var ownDestructuringErrors = false;
+ if (!refDestructuringErrors) {
+ refDestructuringErrors = new DestructuringErrors;
+ ownDestructuringErrors = true;
+ }
+ var startPos = this.start, startLoc = this.startLoc;
+ if (this.type == tt.parenL || this.type == tt.name)
+ this.potentialArrowAt = this.start;
+ var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
+ if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc);
+ if (this.type.isAssign) {
+ this.checkPatternErrors(refDestructuringErrors, true);
+ if (!ownDestructuringErrors) DestructuringErrors.call(refDestructuringErrors);
+ var node = this.startNodeAt(startPos, startLoc);
+ node.operator = this.value;
+ node.left = this.type === tt.eq ? this.toAssignable(left) : left;
+ refDestructuringErrors.shorthandAssign = 0; // reset because shorthand default was used correctly
+ this.checkLVal(left);
+ this.next();
+ node.right = this.parseMaybeAssign(noIn);
+ return this.finishNode(node, "AssignmentExpression")
+ } else {
+ if (ownDestructuringErrors) this.checkExpressionErrors(refDestructuringErrors, true);
+ }
+ return left
+};
+
+// Parse a ternary conditional (`?:`) operator.
+
+pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
+ var startPos = this.start, startLoc = this.startLoc;
+ var expr = this.parseExprOps(noIn, refDestructuringErrors);
+ if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+ if (this.eat(tt.question)) {
+ var node = this.startNodeAt(startPos, startLoc);
+ node.test = expr;
+ node.consequent = this.parseMaybeAssign();
+ this.expect(tt.colon);
+ node.alternate = this.parseMaybeAssign(noIn);
+ return this.finishNode(node, "ConditionalExpression")
+ }
+ return expr
+};
+
+// Start the precedence parser.
+
+pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
+ var startPos = this.start, startLoc = this.startLoc;
+ var expr = this.parseMaybeUnary(refDestructuringErrors, false);
+ if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+ return this.parseExprOp(expr, startPos, startLoc, -1, noIn)
+};
+
+// Parse binary operators with the operator precedence parsing
+// algorithm. `left` is the left-hand side of the operator.
+// `minPrec` provides context that allows the function to stop and
+// defer further parser to one of its callers when it encounters an
+// operator that has a lower precedence than the set it is parsing.
+
+pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
+ var prec = this.type.binop;
+ if (prec != null && (!noIn || this.type !== tt._in)) {
+ if (prec > minPrec) {
+ var logical = this.type === tt.logicalOR || this.type === tt.logicalAND;
+ var op = this.value;
+ this.next();
+ var startPos = this.start, startLoc = this.startLoc;
+ var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
+ var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
+ return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
+ }
+ }
+ return left
+};
+
+pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
+ var node = this.startNodeAt(startPos, startLoc);
+ node.left = left;
+ node.operator = op;
+ node.right = right;
+ return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
+};
+
+// Parse unary operators, both prefix and postfix.
+
+pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
+ var this$1 = this;
+
+ var startPos = this.start, startLoc = this.startLoc, expr;
+ if (this.inAsync && this.isContextual("await")) {
+ expr = this.parseAwait(refDestructuringErrors);
+ sawUnary = true;
+ } else if (this.type.prefix) {
+ var node = this.startNode(), update = this.type === tt.incDec;
+ node.operator = this.value;
+ node.prefix = true;
+ this.next();
+ node.argument = this.parseMaybeUnary(null, true);
+ this.checkExpressionErrors(refDestructuringErrors, true);
+ if (update) this.checkLVal(node.argument);
+ else if (this.strict && node.operator === "delete" &&
+ node.argument.type === "Identifier")
+ this.raiseRecoverable(node.start, "Deleting local variable in strict mode");
+ else sawUnary = true;
+ expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
+ } else {
+ expr = this.parseExprSubscripts(refDestructuringErrors);
+ if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+ while (this.type.postfix && !this.canInsertSemicolon()) {
+ var node$1 = this$1.startNodeAt(startPos, startLoc);
+ node$1.operator = this$1.value;
+ node$1.prefix = false;
+ node$1.argument = expr;
+ this$1.checkLVal(expr);
+ this$1.next();
+ expr = this$1.finishNode(node$1, "UpdateExpression");
+ }
+ }
+
+ if (!sawUnary && this.eat(tt.starstar))
+ return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false)
+ else
+ return expr
+};
+
+// Parse call, dot, and `[]`-subscript expressions.
+
+pp$3.parseExprSubscripts = function(refDestructuringErrors) {
+ var startPos = this.start, startLoc = this.startLoc;
+ var expr = this.parseExprAtom(refDestructuringErrors);
+ var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")";
+ if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) return expr
+ return this.parseSubscripts(expr, startPos, startLoc)
+};
+
+pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
+ var this$1 = this;
+
+ for (;;) {
+ var maybeAsyncArrow = this$1.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon();
+ if (this$1.eat(tt.dot)) {
+ var node = this$1.startNodeAt(startPos, startLoc);
+ node.object = base;
+ node.property = this$1.parseIdent(true);
+ node.computed = false;
+ base = this$1.finishNode(node, "MemberExpression");
+ } else if (this$1.eat(tt.bracketL)) {
+ var node$1 = this$1.startNodeAt(startPos, startLoc);
+ node$1.object = base;
+ node$1.property = this$1.parseExpression();
+ node$1.computed = true;
+ this$1.expect(tt.bracketR);
+ base = this$1.finishNode(node$1, "MemberExpression");
+ } else if (!noCalls && this$1.eat(tt.parenL)) {
+ var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos;
+ this$1.yieldPos = 0;
+ this$1.awaitPos = 0;
+ var exprList = this$1.parseExprList(tt.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors);
+ if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(tt.arrow)) {
+ this$1.checkPatternErrors(refDestructuringErrors, true);
+ this$1.checkYieldAwaitInDefaultParams();
+ this$1.yieldPos = oldYieldPos;
+ this$1.awaitPos = oldAwaitPos;
+ return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true)
+ }
+ this$1.checkExpressionErrors(refDestructuringErrors, true);
+ this$1.yieldPos = oldYieldPos || this$1.yieldPos;
+ this$1.awaitPos = oldAwaitPos || this$1.awaitPos;
+ var node$2 = this$1.startNodeAt(startPos, startLoc);
+ node$2.callee = base;
+ node$2.arguments = exprList;
+ base = this$1.finishNode(node$2, "CallExpression");
+ } else if (this$1.type === tt.backQuote) {
+ var node$3 = this$1.startNodeAt(startPos, startLoc);
+ node$3.tag = base;
+ node$3.quasi = this$1.parseTemplate();
+ base = this$1.finishNode(node$3, "TaggedTemplateExpression");
+ } else {
+ return base
+ }
+ }
+};
+
+// Parse an atomic expression — either a single token that is an
+// expression, an expression started by a keyword like `function` or
+// `new`, or an expression wrapped in punctuation like `()`, `[]`,
+// or `{}`.
+
+pp$3.parseExprAtom = function(refDestructuringErrors) {
+ var node, canBeArrow = this.potentialArrowAt == this.start;
+ switch (this.type) {
+ case tt._super:
+ if (!this.inFunction)
+ this.raise(this.start, "'super' outside of function or class");
+
+ case tt._this:
+ var type = this.type === tt._this ? "ThisExpression" : "Super";
+ node = this.startNode();
+ this.next();
+ return this.finishNode(node, type)
+
+ case tt.name:
+ var startPos = this.start, startLoc = this.startLoc;
+ var id = this.parseIdent(this.type !== tt.name);
+ if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(tt._function))
+ return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true)
+ if (canBeArrow && !this.canInsertSemicolon()) {
+ if (this.eat(tt.arrow))
+ return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false)
+ if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === tt.name) {
+ id = this.parseIdent();
+ if (this.canInsertSemicolon() || !this.eat(tt.arrow))
+ this.unexpected();
+ return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
+ }
+ }
+ return id
+
+ case tt.regexp:
+ var value = this.value;
+ node = this.parseLiteral(value.value);
+ node.regex = {pattern: value.pattern, flags: value.flags};
+ return node
+
+ case tt.num: case tt.string:
+ return this.parseLiteral(this.value)
+
+ case tt._null: case tt._true: case tt._false:
+ node = this.startNode();
+ node.value = this.type === tt._null ? null : this.type === tt._true;
+ node.raw = this.type.keyword;
+ this.next();
+ return this.finishNode(node, "Literal")
+
+ case tt.parenL:
+ return this.parseParenAndDistinguishExpression(canBeArrow)
+
+ case tt.bracketL:
+ node = this.startNode();
+ this.next();
+ node.elements = this.parseExprList(tt.bracketR, true, true, refDestructuringErrors);
+ return this.finishNode(node, "ArrayExpression")
+
+ case tt.braceL:
+ return this.parseObj(false, refDestructuringErrors)
+
+ case tt._function:
+ node = this.startNode();
+ this.next();
+ return this.parseFunction(node, false)
+
+ case tt._class:
+ return this.parseClass(this.startNode(), false)
+
+ case tt._new:
+ return this.parseNew()
+
+ case tt.backQuote:
+ return this.parseTemplate()
+
+ default:
+ this.unexpected();
+ }
+};
+
+pp$3.parseLiteral = function(value) {
+ var node = this.startNode();
+ node.value = value;
+ node.raw = this.input.slice(this.start, this.end);
+ this.next();
+ return this.finishNode(node, "Literal")
+};
+
+pp$3.parseParenExpression = function() {
+ this.expect(tt.parenL);
+ var val = this.parseExpression();
+ this.expect(tt.parenR);
+ return val
+};
+
+pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
+ var this$1 = this;
+
+ var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
+ if (this.options.ecmaVersion >= 6) {
+ this.next();
+
+ var innerStartPos = this.start, innerStartLoc = this.startLoc;
+ var exprList = [], first = true, lastIsComma = false;
+ var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart;
+ this.yieldPos = 0;
+ this.awaitPos = 0;
+ while (this.type !== tt.parenR) {
+ first ? first = false : this$1.expect(tt.comma);
+ if (allowTrailingComma && this$1.afterTrailingComma(tt.parenR, true)) {
+ lastIsComma = true;
+ break
+ } else if (this$1.type === tt.ellipsis) {
+ spreadStart = this$1.start;
+ exprList.push(this$1.parseParenItem(this$1.parseRest()));
+ if (this$1.type === tt.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element");
+ break
+ } else {
+ if (this$1.type === tt.parenL && !innerParenStart) {
+ innerParenStart = this$1.start;
+ }
+ exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem));
+ }
+ }
+ var innerEndPos = this.start, innerEndLoc = this.startLoc;
+ this.expect(tt.parenR);
+
+ if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
+ this.checkPatternErrors(refDestructuringErrors, true);
+ this.checkYieldAwaitInDefaultParams();
+ if (innerParenStart) this.unexpected(innerParenStart);
+ this.yieldPos = oldYieldPos;
+ this.awaitPos = oldAwaitPos;
+ return this.parseParenArrowList(startPos, startLoc, exprList)
+ }
+
+ if (!exprList.length || lastIsComma) this.unexpected(this.lastTokStart);
+ if (spreadStart) this.unexpected(spreadStart);
+ this.checkExpressionErrors(refDestructuringErrors, true);
+ this.yieldPos = oldYieldPos || this.yieldPos;
+ this.awaitPos = oldAwaitPos || this.awaitPos;
+
+ if (exprList.length > 1) {
+ val = this.startNodeAt(innerStartPos, innerStartLoc);
+ val.expressions = exprList;
+ this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
+ } else {
+ val = exprList[0];
+ }
+ } else {
+ val = this.parseParenExpression();
+ }
+
+ if (this.options.preserveParens) {
+ var par = this.startNodeAt(startPos, startLoc);
+ par.expression = val;
+ return this.finishNode(par, "ParenthesizedExpression")
+ } else {
+ return val
+ }
+};
+
+pp$3.parseParenItem = function(item) {
+ return item
+};
+
+pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
+ return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
+};
+
+// New's precedence is slightly tricky. It must allow its argument to
+// be a `[]` or dot subscript expression, but not a call — at least,
+// not without wrapping it in parentheses. Thus, it uses the noCalls
+// argument to parseSubscripts to prevent it from consuming the
+// argument list.
+
+var empty$1 = [];
+
+pp$3.parseNew = function() {
+ var node = this.startNode();
+ var meta = this.parseIdent(true);
+ if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
+ node.meta = meta;
+ node.property = this.parseIdent(true);
+ if (node.property.name !== "target")
+ this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target");
+ if (!this.inFunction)
+ this.raiseRecoverable(node.start, "new.target can only be used in functions");
+ return this.finishNode(node, "MetaProperty")
+ }
+ var startPos = this.start, startLoc = this.startLoc;
+ node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
+ if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false);
+ else node.arguments = empty$1;
+ return this.finishNode(node, "NewExpression")
+};
+
+// Parse template expression.
+
+pp$3.parseTemplateElement = function() {
+ var elem = this.startNode();
+ elem.value = {
+ raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, '\n'),
+ cooked: this.value
+ };
+ this.next();
+ elem.tail = this.type === tt.backQuote;
+ return this.finishNode(elem, "TemplateElement")
+};
+
+pp$3.parseTemplate = function() {
+ var this$1 = this;
+
+ var node = this.startNode();
+ this.next();
+ node.expressions = [];
+ var curElt = this.parseTemplateElement();
+ node.quasis = [curElt];
+ while (!curElt.tail) {
+ this$1.expect(tt.dollarBraceL);
+ node.expressions.push(this$1.parseExpression());
+ this$1.expect(tt.braceR);
+ node.quasis.push(curElt = this$1.parseTemplateElement());
+ }
+ this.next();
+ return this.finishNode(node, "TemplateLiteral")
+};
+
+// Parse an object literal or binding pattern.
+
+pp$3.parseObj = function(isPattern, refDestructuringErrors) {
+ var this$1 = this;
+
+ var node = this.startNode(), first = true, propHash = {};
+ node.properties = [];
+ this.next();
+ while (!this.eat(tt.braceR)) {
+ if (!first) {
+ this$1.expect(tt.comma);
+ if (this$1.afterTrailingComma(tt.braceR)) break
+ } else first = false;
+
+ var prop = this$1.startNode(), isGenerator, isAsync, startPos, startLoc;
+ if (this$1.options.ecmaVersion >= 6) {
+ prop.method = false;
+ prop.shorthand = false;
+ if (isPattern || refDestructuringErrors) {
+ startPos = this$1.start;
+ startLoc = this$1.startLoc;
+ }
+ if (!isPattern)
+ isGenerator = this$1.eat(tt.star);
+ }
+ this$1.parsePropertyName(prop);
+ if (!isPattern && this$1.options.ecmaVersion >= 8 && !isGenerator && !prop.computed &&
+ prop.key.type === "Identifier" && prop.key.name === "async" && this$1.type !== tt.parenL &&
+ this$1.type !== tt.colon && !this$1.canInsertSemicolon()) {
+ isAsync = true;
+ this$1.parsePropertyName(prop, refDestructuringErrors);
+ } else {
+ isAsync = false;
+ }
+ this$1.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors);
+ this$1.checkPropClash(prop, propHash);
+ node.properties.push(this$1.finishNode(prop, "Property"));
+ }
+ return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
+};
+
+pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors) {
+ if ((isGenerator || isAsync) && this.type === tt.colon)
+ this.unexpected();
+
+ if (this.eat(tt.colon)) {
+ prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
+ prop.kind = "init";
+ } else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
+ if (isPattern) this.unexpected();
+ prop.kind = "init";
+ prop.method = true;
+ prop.value = this.parseMethod(isGenerator, isAsync);
+ } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
+ (prop.key.name === "get" || prop.key.name === "set") &&
+ (this.type != tt.comma && this.type != tt.braceR)) {
+ if (isGenerator || isAsync || isPattern) this.unexpected();
+ prop.kind = prop.key.name;
+ this.parsePropertyName(prop);
+ prop.value = this.parseMethod(false);
+ var paramCount = prop.kind === "get" ? 0 : 1;
+ if (prop.value.params.length !== paramCount) {
+ var start = prop.value.start;
+ if (prop.kind === "get")
+ this.raiseRecoverable(start, "getter should have no params");
+ else
+ this.raiseRecoverable(start, "setter should have exactly one param");
+ } else {
+ if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
+ this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params");
+ }
+ } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
+ if (this.keywords.test(prop.key.name) ||
+ (this.strict ? this.reservedWordsStrict : this.reservedWords).test(prop.key.name) ||
+ (this.inGenerator && prop.key.name == "yield") ||
+ (this.inAsync && prop.key.name == "await"))
+ this.raiseRecoverable(prop.key.start, "'" + prop.key.name + "' can not be used as shorthand property");
+ prop.kind = "init";
+ if (isPattern) {
+ prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+ } else if (this.type === tt.eq && refDestructuringErrors) {
+ if (!refDestructuringErrors.shorthandAssign)
+ refDestructuringErrors.shorthandAssign = this.start;
+ prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+ } else {
+ prop.value = prop.key;
+ }
+ prop.shorthand = true;
+ } else this.unexpected();
+};
+
+pp$3.parsePropertyName = function(prop) {
+ if (this.options.ecmaVersion >= 6) {
+ if (this.eat(tt.bracketL)) {
+ prop.computed = true;
+ prop.key = this.parseMaybeAssign();
+ this.expect(tt.bracketR);
+ return prop.key
+ } else {
+ prop.computed = false;
+ }
+ }
+ return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true)
+};
+
+// Initialize empty function node.
+
+pp$3.initFunction = function(node) {
+ node.id = null;
+ if (this.options.ecmaVersion >= 6) {
+ node.generator = false;
+ node.expression = false;
+ }
+ if (this.options.ecmaVersion >= 8)
+ node.async = false;
+};
+
+// Parse object or class method.
+
+pp$3.parseMethod = function(isGenerator, isAsync) {
+ var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos;
+
+ this.initFunction(node);
+ if (this.options.ecmaVersion >= 6)
+ node.generator = isGenerator;
+ if (this.options.ecmaVersion >= 8)
+ node.async = !!isAsync;
+
+ this.inGenerator = node.generator;
+ this.inAsync = node.async;
+ this.yieldPos = 0;
+ this.awaitPos = 0;
+
+ this.expect(tt.parenL);
+ node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8);
+ this.checkYieldAwaitInDefaultParams();
+ this.parseFunctionBody(node, false);
+
+ this.inGenerator = oldInGen;
+ this.inAsync = oldInAsync;
+ this.yieldPos = oldYieldPos;
+ this.awaitPos = oldAwaitPos;
+ return this.finishNode(node, "FunctionExpression")
+};
+
+// Parse arrow function expression with given parameters.
+
+pp$3.parseArrowExpression = function(node, params, isAsync) {
+ var oldInGen = this.inGenerator, oldInAsync = this.inAsync, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos;
+
+ this.initFunction(node);
+ if (this.options.ecmaVersion >= 8)
+ node.async = !!isAsync;
+
+ this.inGenerator = false;
+ this.inAsync = node.async;
+ this.yieldPos = 0;
+ this.awaitPos = 0;
+
+ node.params = this.toAssignableList(params, true);
+ this.parseFunctionBody(node, true);
+
+ this.inGenerator = oldInGen;
+ this.inAsync = oldInAsync;
+ this.yieldPos = oldYieldPos;
+ this.awaitPos = oldAwaitPos;
+ return this.finishNode(node, "ArrowFunctionExpression")
+};
+
+// Parse function body and check parameters.
+
+pp$3.parseFunctionBody = function(node, isArrowFunction) {
+ var isExpression = isArrowFunction && this.type !== tt.braceL;
+
+ if (isExpression) {
+ node.body = this.parseMaybeAssign();
+ node.expression = true;
+ } else {
+ // Start a new scope with regard to labels and the `inFunction`
+ // flag (restore them to their old value afterwards).
+ var oldInFunc = this.inFunction, oldLabels = this.labels;
+ this.inFunction = true; this.labels = [];
+ node.body = this.parseBlock(true);
+ node.expression = false;
+ this.inFunction = oldInFunc; this.labels = oldLabels;
+ }
+
+ // If this is a strict mode function, verify that argument names
+ // are not repeated, and it does not try to bind the words `eval`
+ // or `arguments`.
+ var useStrict = (!isExpression && node.body.body.length && this.isUseStrict(node.body.body[0])) ? node.body.body[0] : null;
+ if (useStrict && this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params))
+ this.raiseRecoverable(useStrict.start, "Illegal 'use strict' directive in function with non-simple parameter list");
+
+ if (this.strict || useStrict) {
+ var oldStrict = this.strict;
+ this.strict = true;
+ if (node.id)
+ this.checkLVal(node.id, true);
+ this.checkParams(node);
+ this.strict = oldStrict;
+ } else if (isArrowFunction || !this.isSimpleParamList(node.params)) {
+ this.checkParams(node);
+ }
+};
+
+pp$3.isSimpleParamList = function(params) {
+ for (var i = 0; i < params.length; i++)
+ if (params[i].type !== "Identifier") return false
+ return true
+};
+
+// Checks function params for various disallowed patterns such as using "eval"
+// or "arguments" and duplicate parameters.
+
+pp$3.checkParams = function(node) {
+ var this$1 = this;
+
+ var nameHash = {};
+ for (var i = 0; i < node.params.length; i++) this$1.checkLVal(node.params[i], true, nameHash);
+};
+
+// Parses a comma-separated list of expressions, and returns them as
+// an array. `close` is the token type that ends the list, and
+// `allowEmpty` can be turned on to allow subsequent commas with
+// nothing in between them to be parsed as `null` (which is needed
+// for array literals).
+
+pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
+ var this$1 = this;
+
+ var elts = [], first = true;
+ while (!this.eat(close)) {
+ if (!first) {
+ this$1.expect(tt.comma);
+ if (allowTrailingComma && this$1.afterTrailingComma(close)) break
+ } else first = false;
+
+ var elt;
+ if (allowEmpty && this$1.type === tt.comma)
+ elt = null;
+ else if (this$1.type === tt.ellipsis) {
+ elt = this$1.parseSpread(refDestructuringErrors);
+ if (this$1.type === tt.comma && refDestructuringErrors && !refDestructuringErrors.trailingComma) {
+ refDestructuringErrors.trailingComma = this$1.start;
+ }
+ } else
+ elt = this$1.parseMaybeAssign(false, refDestructuringErrors);
+ elts.push(elt);
+ }
+ return elts
+};
+
+// Parse the next token as an identifier. If `liberal` is true (used
+// when parsing properties), it will also convert keywords into
+// identifiers.
+
+pp$3.parseIdent = function(liberal) {
+ var node = this.startNode();
+ if (liberal && this.options.allowReserved == "never") liberal = false;
+ if (this.type === tt.name) {
+ if (!liberal && (this.strict ? this.reservedWordsStrict : this.reservedWords).test(this.value) &&
+ (this.options.ecmaVersion >= 6 ||
+ this.input.slice(this.start, this.end).indexOf("\\") == -1))
+ this.raiseRecoverable(this.start, "The keyword '" + this.value + "' is reserved");
+ if (this.inGenerator && this.value === "yield")
+ this.raiseRecoverable(this.start, "Can not use 'yield' as identifier inside a generator");
+ if (this.inAsync && this.value === "await")
+ this.raiseRecoverable(this.start, "Can not use 'await' as identifier inside an async function");
+ node.name = this.value;
+ } else if (liberal && this.type.keyword) {
+ node.name = this.type.keyword;
+ } else {
+ this.unexpected();
+ }
+ this.next();
+ return this.finishNode(node, "Identifier")
+};
+
+// Parses yield expression inside generator.
+
+pp$3.parseYield = function() {
+ if (!this.yieldPos) this.yieldPos = this.start;
+
+ var node = this.startNode();
+ this.next();
+ if (this.type == tt.semi || this.canInsertSemicolon() || (this.type != tt.star && !this.type.startsExpr)) {
+ node.delegate = false;
+ node.argument = null;
+ } else {
+ node.delegate = this.eat(tt.star);
+ node.argument = this.parseMaybeAssign();
+ }
+ return this.finishNode(node, "YieldExpression")
+};
+
+pp$3.parseAwait = function() {
+ if (!this.awaitPos) this.awaitPos = this.start;
+
+ var node = this.startNode();
+ this.next();
+ node.argument = this.parseMaybeUnary(null, true);
+ return this.finishNode(node, "AwaitExpression")
+};
+
+var pp$4 = Parser.prototype;
+
+// This function is used to raise exceptions on parse errors. It
+// takes an offset integer (into the current `input`) to indicate
+// the location of the error, attaches the position to the end
+// of the error message, and then raises a `SyntaxError` with that
+// message.
+
+pp$4.raise = function(pos, message) {
+ var loc = getLineInfo(this.input, pos);
+ message += " (" + loc.line + ":" + loc.column + ")";
+ var err = new SyntaxError(message);
+ err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
+ throw err
+};
+
+pp$4.raiseRecoverable = pp$4.raise;
+
+pp$4.curPosition = function() {
+ if (this.options.locations) {
+ return new Position(this.curLine, this.pos - this.lineStart)
+ }
+};
+
+var Node = function Node(parser, pos, loc) {
+ this.type = "";
+ this.start = pos;
+ this.end = 0;
+ if (parser.options.locations)
+ this.loc = new SourceLocation(parser, loc);
+ if (parser.options.directSourceFile)
+ this.sourceFile = parser.options.directSourceFile;
+ if (parser.options.ranges)
+ this.range = [pos, 0];
+};
+
+// Start an AST node, attaching a start offset.
+
+var pp$5 = Parser.prototype;
+
+pp$5.startNode = function() {
+ return new Node(this, this.start, this.startLoc)
+};
+
+pp$5.startNodeAt = function(pos, loc) {
+ return new Node(this, pos, loc)
+};
+
+// Finish an AST node, adding `type` and `end` properties.
+
+function finishNodeAt(node, type, pos, loc) {
+ node.type = type;
+ node.end = pos;
+ if (this.options.locations)
+ node.loc.end = loc;
+ if (this.options.ranges)
+ node.range[1] = pos;
+ return node
+}
+
+pp$5.finishNode = function(node, type) {
+ return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
+};
+
+// Finish node at given position
+
+pp$5.finishNodeAt = function(node, type, pos, loc) {
+ return finishNodeAt.call(this, node, type, pos, loc)
+};
+
+var TokContext = function TokContext(token, isExpr, preserveSpace, override) {
+ this.token = token;
+ this.isExpr = !!isExpr;
+ this.preserveSpace = !!preserveSpace;
+ this.override = override;
+};
+
+var types = {
+ b_stat: new TokContext("{", false),
+ b_expr: new TokContext("{", true),
+ b_tmpl: new TokContext("${", true),
+ p_stat: new TokContext("(", false),
+ p_expr: new TokContext("(", true),
+ q_tmpl: new TokContext("`", true, true, function (p) { return p.readTmplToken(); }),
+ f_expr: new TokContext("function", true)
+};
+
+var pp$6 = Parser.prototype;
+
+pp$6.initialContext = function() {
+ return [types.b_stat]
+};
+
+pp$6.braceIsBlock = function(prevType) {
+ if (prevType === tt.colon) {
+ var parent = this.curContext();
+ if (parent === types.b_stat || parent === types.b_expr)
+ return !parent.isExpr
+ }
+ if (prevType === tt._return)
+ return lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+ if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR)
+ return true
+ if (prevType == tt.braceL)
+ return this.curContext() === types.b_stat
+ return !this.exprAllowed
+};
+
+pp$6.updateContext = function(prevType) {
+ var update, type = this.type;
+ if (type.keyword && prevType == tt.dot)
+ this.exprAllowed = false;
+ else if (update = type.updateContext)
+ update.call(this, prevType);
+ else
+ this.exprAllowed = type.beforeExpr;
+};
+
+// Token-specific context update code
+
+tt.parenR.updateContext = tt.braceR.updateContext = function() {
+ if (this.context.length == 1) {
+ this.exprAllowed = true;
+ return
+ }
+ var out = this.context.pop();
+ if (out === types.b_stat && this.curContext() === types.f_expr) {
+ this.context.pop();
+ this.exprAllowed = false;
+ } else if (out === types.b_tmpl) {
+ this.exprAllowed = true;
+ } else {
+ this.exprAllowed = !out.isExpr;
+ }
+};
+
+tt.braceL.updateContext = function(prevType) {
+ this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr);
+ this.exprAllowed = true;
+};
+
+tt.dollarBraceL.updateContext = function() {
+ this.context.push(types.b_tmpl);
+ this.exprAllowed = true;
+};
+
+tt.parenL.updateContext = function(prevType) {
+ var statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while;
+ this.context.push(statementParens ? types.p_stat : types.p_expr);
+ this.exprAllowed = true;
+};
+
+tt.incDec.updateContext = function() {
+ // tokExprAllowed stays unchanged
+};
+
+tt._function.updateContext = function(prevType) {
+ if (prevType.beforeExpr && prevType !== tt.semi && prevType !== tt._else &&
+ !((prevType === tt.colon || prevType === tt.braceL) && this.curContext() === types.b_stat))
+ this.context.push(types.f_expr);
+ this.exprAllowed = false;
+};
+
+tt.backQuote.updateContext = function() {
+ if (this.curContext() === types.q_tmpl)
+ this.context.pop();
+ else
+ this.context.push(types.q_tmpl);
+ this.exprAllowed = false;
+};
+
+// Object type used to represent tokens. Note that normally, tokens
+// simply exist as properties on the parser object. This is only
+// used for the onToken callback and the external tokenizer.
+
+var Token = function Token(p) {
+ this.type = p.type;
+ this.value = p.value;
+ this.start = p.start;
+ this.end = p.end;
+ if (p.options.locations)
+ this.loc = new SourceLocation(p, p.startLoc, p.endLoc);
+ if (p.options.ranges)
+ this.range = [p.start, p.end];
+};
+
+// ## Tokenizer
+
+var pp$7 = Parser.prototype;
+
+// Are we running under Rhino?
+var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]";
+
+// Move to the next token
+
+pp$7.next = function() {
+ if (this.options.onToken)
+ this.options.onToken(new Token(this));
+
+ this.lastTokEnd = this.end;
+ this.lastTokStart = this.start;
+ this.lastTokEndLoc = this.endLoc;
+ this.lastTokStartLoc = this.startLoc;
+ this.nextToken();
+};
+
+pp$7.getToken = function() {
+ this.next();
+ return new Token(this)
+};
+
+// If we're in an ES6 environment, make parsers iterable
+if (typeof Symbol !== "undefined")
+ pp$7[Symbol.iterator] = function () {
+ var self = this;
+ return {next: function () {
+ var token = self.getToken();
+ return {
+ done: token.type === tt.eof,
+ value: token
+ }
+ }}
+ };
+
+// Toggle strict mode. Re-reads the next number or string to please
+// pedantic tests (`"use strict"; 010;` should fail).
+
+pp$7.setStrict = function(strict) {
+ var this$1 = this;
+
+ this.strict = strict;
+ if (this.type !== tt.num && this.type !== tt.string) return
+ this.pos = this.start;
+ if (this.options.locations) {
+ while (this.pos < this.lineStart) {
+ this$1.lineStart = this$1.input.lastIndexOf("\n", this$1.lineStart - 2) + 1;
+ --this$1.curLine;
+ }
+ }
+ this.nextToken();
+};
+
+pp$7.curContext = function() {
+ return this.context[this.context.length - 1]
+};
+
+// Read a single token, updating the parser object's token-related
+// properties.
+
+pp$7.nextToken = function() {
+ var curContext = this.curContext();
+ if (!curContext || !curContext.preserveSpace) this.skipSpace();
+
+ this.start = this.pos;
+ if (this.options.locations) this.startLoc = this.curPosition();
+ if (this.pos >= this.input.length) return this.finishToken(tt.eof)
+
+ if (curContext.override) return curContext.override(this)
+ else this.readToken(this.fullCharCodeAtPos());
+};
+
+pp$7.readToken = function(code) {
+ // Identifier or keyword. '\uXXXX' sequences are allowed in
+ // identifiers, so '\' also dispatches to that.
+ if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
+ return this.readWord()
+
+ return this.getTokenFromCode(code)
+};
+
+pp$7.fullCharCodeAtPos = function() {
+ var code = this.input.charCodeAt(this.pos);
+ if (code <= 0xd7ff || code >= 0xe000) return code
+ var next = this.input.charCodeAt(this.pos + 1);
+ return (code << 10) + next - 0x35fdc00
+};
+
+pp$7.skipBlockComment = function() {
+ var this$1 = this;
+
+ var startLoc = this.options.onComment && this.curPosition();
+ var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
+ if (end === -1) this.raise(this.pos - 2, "Unterminated comment");
+ this.pos = end + 2;
+ if (this.options.locations) {
+ lineBreakG.lastIndex = start;
+ var match;
+ while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
+ ++this$1.curLine;
+ this$1.lineStart = match.index + match[0].length;
+ }
+ }
+ if (this.options.onComment)
+ this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
+ startLoc, this.curPosition());
+};
+
+pp$7.skipLineComment = function(startSkip) {
+ var this$1 = this;
+
+ var start = this.pos;
+ var startLoc = this.options.onComment && this.curPosition();
+ var ch = this.input.charCodeAt(this.pos+=startSkip);
+ while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
+ ++this$1.pos;
+ ch = this$1.input.charCodeAt(this$1.pos);
+ }
+ if (this.options.onComment)
+ this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
+ startLoc, this.curPosition());
+};
+
+// Called at the start of the parse and after every token. Skips
+// whitespace and comments, and.
+
+pp$7.skipSpace = function() {
+ var this$1 = this;
+
+ loop: while (this.pos < this.input.length) {
+ var ch = this$1.input.charCodeAt(this$1.pos);
+ switch (ch) {
+ case 32: case 160: // ' '
+ ++this$1.pos;
+ break
+ case 13:
+ if (this$1.input.charCodeAt(this$1.pos + 1) === 10) {
+ ++this$1.pos;
+ }
+ case 10: case 8232: case 8233:
+ ++this$1.pos;
+ if (this$1.options.locations) {
+ ++this$1.curLine;
+ this$1.lineStart = this$1.pos;
+ }
+ break
+ case 47: // '/'
+ switch (this$1.input.charCodeAt(this$1.pos + 1)) {
+ case 42: // '*'
+ this$1.skipBlockComment();
+ break
+ case 47:
+ this$1.skipLineComment(2);
+ break
+ default:
+ break loop
+ }
+ break
+ default:
+ if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
+ ++this$1.pos;
+ } else {
+ break loop
+ }
+ }
+ }
+};
+
+// Called at the end of every token. Sets `end`, `val`, and
+// maintains `context` and `exprAllowed`, and skips the space after
+// the token, so that the next one's `start` will point at the
+// right position.
+
+pp$7.finishToken = function(type, val) {
+ this.end = this.pos;
+ if (this.options.locations) this.endLoc = this.curPosition();
+ var prevType = this.type;
+ this.type = type;
+ this.value = val;
+
+ this.updateContext(prevType);
+};
+
+// ### Token reading
+
+// This is the function that is called to fetch the next token. It
+// is somewhat obscure, because it works in character codes rather
+// than characters, and because operator parsing has been inlined
+// into it.
+//
+// All in the name of speed.
+//
+pp$7.readToken_dot = function() {
+ var next = this.input.charCodeAt(this.pos + 1);
+ if (next >= 48 && next <= 57) return this.readNumber(true)
+ var next2 = this.input.charCodeAt(this.pos + 2);
+ if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
+ this.pos += 3;
+ return this.finishToken(tt.ellipsis)
+ } else {
+ ++this.pos;
+ return this.finishToken(tt.dot)
+ }
+};
+
+pp$7.readToken_slash = function() { // '/'
+ var next = this.input.charCodeAt(this.pos + 1);
+ if (this.exprAllowed) {++this.pos; return this.readRegexp()}
+ if (next === 61) return this.finishOp(tt.assign, 2)
+ return this.finishOp(tt.slash, 1)
+};
+
+pp$7.readToken_mult_modulo_exp = function(code) { // '%*'
+ var next = this.input.charCodeAt(this.pos + 1);
+ var size = 1;
+ var tokentype = code === 42 ? tt.star : tt.modulo;
+
+ // exponentiation operator ** and **=
+ if (this.options.ecmaVersion >= 7 && next === 42) {
+ ++size;
+ tokentype = tt.starstar;
+ next = this.input.charCodeAt(this.pos + 2);
+ }
+
+ if (next === 61) return this.finishOp(tt.assign, size + 1)
+ return this.finishOp(tokentype, size)
+};
+
+pp$7.readToken_pipe_amp = function(code) { // '|&'
+ var next = this.input.charCodeAt(this.pos + 1);
+ if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2)
+ if (next === 61) return this.finishOp(tt.assign, 2)
+ return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1)
+};
+
+pp$7.readToken_caret = function() { // '^'
+ var next = this.input.charCodeAt(this.pos + 1);
+ if (next === 61) return this.finishOp(tt.assign, 2)
+ return this.finishOp(tt.bitwiseXOR, 1)
+};
+
+pp$7.readToken_plus_min = function(code) { // '+-'
+ var next = this.input.charCodeAt(this.pos + 1);
+ if (next === code) {
+ if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 &&
+ lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) {
+ // A `-->` line comment
+ this.skipLineComment(3);
+ this.skipSpace();
+ return this.nextToken()
+ }
+ return this.finishOp(tt.incDec, 2)
+ }
+ if (next === 61) return this.finishOp(tt.assign, 2)
+ return this.finishOp(tt.plusMin, 1)
+};
+
+pp$7.readToken_lt_gt = function(code) { // '<>'
+ var next = this.input.charCodeAt(this.pos + 1);
+ var size = 1;
+ if (next === code) {
+ size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
+ if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1)
+ return this.finishOp(tt.bitShift, size)
+ }
+ if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 &&
+ this.input.charCodeAt(this.pos + 3) == 45) {
+ if (this.inModule) this.unexpected();
+ // `/ );
+ parser.eat( '-->' );
+
+ parser.current().children.push({
+ start,
+ end: parser.index,
+ type: 'Comment',
+ data
+ });
+
+ return null;
+ }
+
+ const isClosingTag = parser.eat( '/' );
+
+ // TODO handle cases like onetwo
+
+ const name = readTagName( parser );
+
+ parser.allowWhitespace();
+
+ if ( isClosingTag ) {
+ if ( !parser.eat( '>' ) ) parser.error( `Expected '>'` );
+
+ const element = parser.current();
+
+ // strip leading/trailing whitespace as necessary
+ if ( element.children.length ) {
+ const firstChild = element.children[0];
+ const lastChild = element.children[ element.children.length - 1 ];
+
+ if ( firstChild.type === 'Text' ) {
+ firstChild.data = trimStart( firstChild.data );
+ if ( !firstChild.data ) element.children.shift();
+ }
+
+ if ( lastChild.type === 'Text' ) {
+ lastChild.data = trimEnd( lastChild.data );
+ if ( !lastChild.data ) element.children.pop();
+ }
+ }
+
+ element.end = parser.index;
+ parser.stack.pop();
+
+ return null;
+ }
+
+ const attributes = [];
+ const uniqueNames = new Set();
+
+ let attribute;
+ while ( attribute = readAttribute( parser, uniqueNames ) ) {
+ attributes.push( attribute );
+ parser.allowWhitespace();
+ }
+
+ parser.allowWhitespace();
+
+ // special cases – ' ) ) {\n\t\t\tbreak;\n\t\t}\n\t}\n\n\tconst source = spaces( scriptStart ) + parser.template.slice( scriptStart, scriptEnd );\n\n\tlet ast;\n\n\ttry {\n\t\tast = parse( source, {\n\t\t\tecmaVersion: 8,\n\t\t\tsourceType: 'module'\n\t\t});\n\t} catch ( err ) {\n\t\tparser.acornError( err );\n\t}\n\n\tif ( !ast.body.length ) return null;\n\n\tast.start = scriptStart;\n\n\treturn {\n\t\tstart,\n\t\tend: parser.index,\n\t\tattributes,\n\t\tcontent: ast\n\t};\n}\n","export default function readStyle ( parser, start, attributes ) {\n\tconst contentStart = parser.index;\n\tconst styles = parser.readUntil( /<\\/style>/ );\n\tconst contentEnd = parser.index;\n\n\tparser.eat( '', true );\n\tconst end = parser.index;\n\n\treturn {\n\t\tstart,\n\t\tend,\n\t\tattributes,\n\t\tcontent: {\n\t\t\tstart: contentStart,\n\t\t\tend: contentEnd,\n\t\t\tstyles\n\t\t}\n\t};\n}\n","import { tokenizer, tokTypes, parseExpressionAt } from 'acorn';\n\nexport function readEventHandlerDirective ( parser, start, name ) {\n\tconst quoteMark = (\n\t\tparser.eat( `'` ) ? `'` :\n\t\tparser.eat( `\"` ) ? `\"` :\n\t\tnull\n\t);\n\n\tconst expressionStart = parser.index;\n\tlet end = null;\n\n\tlet depth = 0;\n\tfor ( const token of tokenizer( parser.remaining() ) ) {\n\t\tif ( token.type === tokTypes.parenL ) depth += 1;\n\t\tif ( token.type === tokTypes.parenR ) {\n\t\t\tdepth -= 1;\n\t\t\tif ( depth === 0 ) {\n\t\t\t\tend = expressionStart + token.end;\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t}\n\n\tconst expression = parseExpressionAt( parser.template.slice( 0, end ), expressionStart );\n\tparser.index = expression.end;\n\n\tif ( expression.type !== 'CallExpression' ) {\n\t\tparser.error( `Expected call expression`, expressionStart );\n\t}\n\n\tif ( quoteMark ) {\n\t\tparser.eat( quoteMark, true );\n\t}\n\n\treturn {\n\t\tstart,\n\t\tend: parser.index,\n\t\ttype: 'EventHandler',\n\t\tname,\n\t\texpression\n\t};\n}\n\nexport function readBindingDirective ( parser, start, name ) {\n\tlet value = name; // shorthand – bind:foo equivalent to bind:foo='foo'\n\n\tif ( parser.eat( '=' ) ) {\n\t\tconst quoteMark = (\n\t\t\tparser.eat( `'` ) ? `'` :\n\t\t\tparser.eat( `\"` ) ? `\"` :\n\t\t\tnull\n\t\t);\n\n\t\tvalue = parser.read( /([a-zA-Z_$][a-zA-Z0-9_$]*)(\\.[a-zA-Z_$][a-zA-Z0-9_$]*)*/ );\n\t\tif ( !value ) parser.error( `Expected valid property name` );\n\n\t\tif ( quoteMark ) {\n\t\t\tparser.eat( quoteMark, true );\n\t\t}\n\t}\n\n\treturn {\n\t\tstart,\n\t\tend: parser.index,\n\t\ttype: 'Binding',\n\t\tname,\n\t\tvalue\n\t};\n}\n","export const whitespace = /\\s/;\n","import { whitespace } from '../patterns.js';\n\nexport function trimStart ( str ) {\n\tlet i = 0;\n\twhile ( whitespace.test( str[i] ) ) i += 1;\n\n\treturn str.slice( i );\n}\n\nexport function trimEnd ( str ) {\n\tlet i = str.length;\n\twhile ( whitespace.test( str[ i - 1 ] ) ) i -= 1;\n\n\treturn str.slice( 0, i );\n}\n","// borrowed from Ractive – https://github.com/ractivejs/ractive/blob/faf93cbd33c3fedfd8d6dd48340990540bde4a94/src/utils/html.js\nconst htmlEntities = { quot: 34, amp: 38, apos: 39, lt: 60, gt: 62, nbsp: 160, iexcl: 161, cent: 162, pound: 163, curren: 164, yen: 165, brvbar: 166, sect: 167, uml: 168, copy: 169, ordf: 170, laquo: 171, not: 172, shy: 173, reg: 174, macr: 175, deg: 176, plusmn: 177, sup2: 178, sup3: 179, acute: 180, micro: 181, para: 182, middot: 183, cedil: 184, sup1: 185, ordm: 186, raquo: 187, frac14: 188, frac12: 189, frac34: 190, iquest: 191, Agrave: 192, Aacute: 193, Acirc: 194, Atilde: 195, Auml: 196, Aring: 197, AElig: 198, Ccedil: 199, Egrave: 200, Eacute: 201, Ecirc: 202, Euml: 203, Igrave: 204, Iacute: 205, Icirc: 206, Iuml: 207, ETH: 208, Ntilde: 209, Ograve: 210, Oacute: 211, Ocirc: 212, Otilde: 213, Ouml: 214, times: 215, Oslash: 216, Ugrave: 217, Uacute: 218, Ucirc: 219, Uuml: 220, Yacute: 221, THORN: 222, szlig: 223, agrave: 224, aacute: 225, acirc: 226, atilde: 227, auml: 228, aring: 229, aelig: 230, ccedil: 231, egrave: 232, eacute: 233, ecirc: 234, euml: 235, igrave: 236, iacute: 237, icirc: 238, iuml: 239, eth: 240, ntilde: 241, ograve: 242, oacute: 243, ocirc: 244, otilde: 245, ouml: 246, divide: 247, oslash: 248, ugrave: 249, uacute: 250, ucirc: 251, uuml: 252, yacute: 253, thorn: 254, yuml: 255, OElig: 338, oelig: 339, Scaron: 352, scaron: 353, Yuml: 376, fnof: 402, circ: 710, tilde: 732, Alpha: 913, Beta: 914, Gamma: 915, Delta: 916, Epsilon: 917, Zeta: 918, Eta: 919, Theta: 920, Iota: 921, Kappa: 922, Lambda: 923, Mu: 924, Nu: 925, Xi: 926, Omicron: 927, Pi: 928, Rho: 929, Sigma: 931, Tau: 932, Upsilon: 933, Phi: 934, Chi: 935, Psi: 936, Omega: 937, alpha: 945, beta: 946, gamma: 947, delta: 948, epsilon: 949, zeta: 950, eta: 951, theta: 952, iota: 953, kappa: 954, lambda: 955, mu: 956, nu: 957, xi: 958, omicron: 959, pi: 960, rho: 961, sigmaf: 962, sigma: 963, tau: 964, upsilon: 965, phi: 966, chi: 967, psi: 968, omega: 969, thetasym: 977, upsih: 978, piv: 982, ensp: 8194, emsp: 8195, thinsp: 8201, zwnj: 8204, zwj: 8205, lrm: 8206, rlm: 8207, ndash: 8211, mdash: 8212, lsquo: 8216, rsquo: 8217, sbquo: 8218, ldquo: 8220, rdquo: 8221, bdquo: 8222, dagger: 8224, Dagger: 8225, bull: 8226, hellip: 8230, permil: 8240, prime: 8242, Prime: 8243, lsaquo: 8249, rsaquo: 8250, oline: 8254, frasl: 8260, euro: 8364, image: 8465, weierp: 8472, real: 8476, trade: 8482, alefsym: 8501, larr: 8592, uarr: 8593, rarr: 8594, darr: 8595, harr: 8596, crarr: 8629, lArr: 8656, uArr: 8657, rArr: 8658, dArr: 8659, hArr: 8660, forall: 8704, part: 8706, exist: 8707, empty: 8709, nabla: 8711, isin: 8712, notin: 8713, ni: 8715, prod: 8719, sum: 8721, minus: 8722, lowast: 8727, radic: 8730, prop: 8733, infin: 8734, ang: 8736, and: 8743, or: 8744, cap: 8745, cup: 8746, int: 8747, there4: 8756, sim: 8764, cong: 8773, asymp: 8776, ne: 8800, equiv: 8801, le: 8804, ge: 8805, sub: 8834, sup: 8835, nsub: 8836, sube: 8838, supe: 8839, oplus: 8853, otimes: 8855, perp: 8869, sdot: 8901, lceil: 8968, rceil: 8969, lfloor: 8970, rfloor: 8971, lang: 9001, rang: 9002, loz: 9674, spades: 9824, clubs: 9827, hearts: 9829, diams: 9830\t};\nconst controlCharacters = [ 8364, 129, 8218, 402, 8222, 8230, 8224, 8225, 710, 8240, 352, 8249, 338, 141, 381, 143, 144, 8216, 8217, 8220, 8221, 8226, 8211, 8212, 732, 8482, 353, 8250, 339, 157, 382, 376 ];\nconst entityPattern = new RegExp( '&(#?(?:x[\\\\w\\\\d]+|\\\\d+|' + Object.keys( htmlEntities ).join( '|' ) + '));?', 'g' );\n\nexport function decodeCharacterReferences ( html ) {\n\treturn html.replace( entityPattern, ( match, entity ) => {\n\t\tlet code;\n\n\t\t// Handle named entities\n\t\tif ( entity[0] !== '#' ) {\n\t\t\tcode = htmlEntities[ entity ];\n\t\t} else if ( entity[1] === 'x' ) {\n\t\t\tcode = parseInt( entity.substring( 2 ), 16 );\n\t\t} else {\n\t\t\tcode = parseInt( entity.substring( 1 ), 10 );\n\t\t}\n\n\t\tif ( !code ) {\n\t\t\treturn match;\n\t\t}\n\n\t\treturn String.fromCodePoint( validateCode( code ) );\n\t});\n}\nconst invalid = 65533;\n\n// some code points are verboten. If we were inserting HTML, the browser would replace the illegal\n// code points with alternatives in some cases - since we're bypassing that mechanism, we need\n// to replace them ourselves\n//\n// Source: http://en.wikipedia.org/wiki/Character_encodings_in_HTML#Illegal_characters\nfunction validateCode ( code ) {\n\tif ( !code ) {\n\t\treturn invalid;\n\t}\n\n\t// line feed becomes generic whitespace\n\tif ( code === 10 ) {\n\t\treturn 32;\n\t}\n\n\t// ASCII range. (Why someone would use HTML entities for ASCII characters I don't know, but...)\n\tif ( code < 128 ) {\n\t\treturn code;\n\t}\n\n\t// code points 128-159 are dealt with leniently by browsers, but they're incorrect. We need\n\t// to correct the mistake or we'll end up with missing € signs and so on\n\tif ( code <= 159 ) {\n\t\treturn controlCharacters[ code - 128 ];\n\t}\n\n\t// basic multilingual plane\n\tif ( code < 55296 ) {\n\t\treturn code;\n\t}\n\n\t// UTF-16 surrogate halves\n\tif ( code <= 57343 ) {\n\t\treturn invalid;\n\t}\n\n\t// rest of the basic multilingual plane\n\tif ( code <= 65535 ) {\n\t\treturn code;\n\t}\n\n\t// supplementary multilingual plane 0x10000 - 0x1ffff\n\tif ( code >= 65536 && code <= 131071 ) {\n\t\treturn code;\n\t}\n\n\t// supplementary ideographic plane 0x20000 - 0x2ffff\n\tif ( code >= 131072 && code <= 196607 ) {\n\t\treturn code;\n\t}\n\n\treturn invalid;\n}\n","import readExpression from '../read/expression.js';\nimport readScript from '../read/script.js';\nimport readStyle from '../read/style.js';\nimport { readEventHandlerDirective, readBindingDirective } from '../read/directives.js';\nimport { trimStart, trimEnd } from '../utils/trim.js';\nimport { decodeCharacterReferences } from '../utils/html.js';\n\nconst validTagName = /^[a-zA-Z]{1,}:?[a-zA-Z0-9\\-]*/;\nconst voidElementNames = /^(?:area|base|br|col|command|doctype|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/;\nconst invalidUnquotedAttributeCharacters = /[\\s\"'=<>\\/`]/;\n\nconst specials = {\n\tscript: {\n\t\tread: readScript,\n\t\tproperty: 'js'\n\t},\n\n\tstyle: {\n\t\tread: readStyle,\n\t\tproperty: 'css'\n\t}\n};\n\nexport default function tag ( parser ) {\n\tconst start = parser.index++;\n\n\tif ( parser.eat( '!--' ) ) {\n\t\tconst data = parser.readUntil( /-->/ );\n\t\tparser.eat( '-->' );\n\n\t\tparser.current().children.push({\n\t\t\tstart,\n\t\t\tend: parser.index,\n\t\t\ttype: 'Comment',\n\t\t\tdata\n\t\t});\n\n\t\treturn null;\n\t}\n\n\tconst isClosingTag = parser.eat( '/' );\n\n\t// TODO handle cases like onetwo\n\n\tconst name = readTagName( parser );\n\n\tparser.allowWhitespace();\n\n\tif ( isClosingTag ) {\n\t\tif ( !parser.eat( '>' ) ) parser.error( `Expected '>'` );\n\n\t\tconst element = parser.current();\n\n\t\t// strip leading/trailing whitespace as necessary\n\t\tif ( element.children.length ) {\n\t\t\tconst firstChild = element.children[0];\n\t\t\tconst lastChild = element.children[ element.children.length - 1 ];\n\n\t\t\tif ( firstChild.type === 'Text' ) {\n\t\t\t\tfirstChild.data = trimStart( firstChild.data );\n\t\t\t\tif ( !firstChild.data ) element.children.shift();\n\t\t\t}\n\n\t\t\tif ( lastChild.type === 'Text' ) {\n\t\t\t\tlastChild.data = trimEnd( lastChild.data );\n\t\t\t\tif ( !lastChild.data ) element.children.pop();\n\t\t\t}\n\t\t}\n\n\t\telement.end = parser.index;\n\t\tparser.stack.pop();\n\n\t\treturn null;\n\t}\n\n\tconst attributes = [];\n\tconst uniqueNames = new Set();\n\n\tlet attribute;\n\twhile ( attribute = readAttribute( parser, uniqueNames ) ) {\n\t\tattributes.push( attribute );\n\t\tparser.allowWhitespace();\n\t}\n\n\tparser.allowWhitespace();\n\n\t// special cases –