parallaxis/node_modules/zeparser/Tokenizer.js

if (typeof exports !== 'undefined') {
	var window = {Unicode: require('./unicodecategories').Unicode};
	exports.Tokenizer = Tokenizer;
}

/*!
 * Tokenizer for JavaScript / ECMAScript 5
 * (c) Peter van der Zee, qfox.nl
 */

/**
 * @param {Object} inp
 * @param {Object} options
 * @property {boolean} [options.tagLiterals] Instructs the tokenizer to also parse tag literals
 */
function Tokenizer(inp, options){
	this.inp = inp||'';
	// replace all other line terminators with \n (leave \r\n in tact though). we should probably remove the shadowInp when finished...
	// only replace \r if it is not followed by a \n else \r\n would become \n\n causing a double newline where it is just a single
	this.shadowInp = (inp||'').replace(Tokenizer.regexNormalizeNewlines, '\n');
	this.pos = 0;
	this.line = 0;
	this.column = 0;
	this.cache = {};

	this.errorStack = [];

	this.wtree = [];
	this.btree = [];

//	this.regexWhiteSpace = Tokenizer.regexWhiteSpace;
	this.regexLineTerminator = Tokenizer.regexLineTerminator; // used in fallback
	this.regexAsciiIdentifier = Tokenizer.regexAsciiIdentifier;
	this.hashAsciiIdentifier = Tokenizer.hashAsciiIdentifier;
//	this.regexHex = Tokenizer.regexHex;
	this.hashHex = Tokenizer.hashHex
	this.regexUnicodeEscape = Tokenizer.regexUnicodeEscape;
	this.regexIdentifierStop = Tokenizer.regexIdentifierStop;
	this.hashIdentifierStop = Tokenizer.hashIdentifierStop;
//	this.regexPunctuators = Tokenizer.regexPunctuators;
	this.regexNumber = Tokenizer.regexNumber;
	this.regexNewline = Tokenizer.regexNewline;

	this.regexBig = Tokenizer.regexBig;
	this.regexBigAlt = Tokenizer.regexBigAlt;

    // stuff for parsing tag literals
    this.regexTagName = Tokenizer.regexTagName;
    this.regexTagAttributes = Tokenizer.regexTagAttributes;
    this.regexTagUnarySuffix = Tokenizer.regexTagUnarySuffix;
    this.regexTagBinarySuffix = Tokenizer.regexTagBinarySuffix;
    this.regexTagBody = Tokenizer.regexTagBody;
    this.regexTagOpenOrClose = Tokenizer.regexTagOpenOrClose;
    this.regexTagClose = Tokenizer.regexTagClose;
	this.regexRemoveEscape = Tokenizer.regexRemoveEscape;

	this.tokenCount = 0;
	this.tokenCountNoWhite = 0;

	this.Unicode = window.Unicode;

	// if the Parser throws an error. it will set this property to the next match
	// at the time of the error (which was not what it was expecting at that point) 
	// and pass on an "error" match. the error should be scooped on the stack and 
	// this property should be returned, without looking at the input...
	this.errorEscape = null;

	// support tag literals
	this.tagLiterals = false || (options && options.tagLiterals);
};

Tokenizer.prototype = {
	// token constants... (should use these some day)
	REGEX: 1,
	IDENTIFIER: 2,
	NUMERIC_HEX: 3,
	NUMERIC_DEC: 4,
	STRING_SINGLE: 5,
	STRING_DOUBLE: 6,
	COMMENT_SINGLE: 7,
	COMMENT_MULTI: 8,
	WHITE_SPACE: 9,
	LINETERMINATOR: 10,
	PUNCTUATOR: 11,
	EOF: 12,
	ASI: 13,
	ERROR: 14,
	TAG: 15,
	CURLY_METHOD: 16,

	inp:null,
	shadowInp:null,
	pos:null,
	line:null,
	column:null,
	cache:null,
	errorStack:null,

	wtree: null, // contains whitespace (spaces, comments, newlines)
	btree: null, // does not contain any whitespace tokens.

	regexLineTerminator:null,
	regexAsciiIdentifier:null,
	hashAsciiIdentifier:null,
	hashHex:null,
	regexUnicodeEscape:null,
	regexIdentifierStop:null,
	hashIdentifierStop:null,
	regexNumber:null,
	regexNewline:null,
	regexBig:null,
	regexBigAlt:null,
	tokenCount:null,
	tokenCountNoWhite:null,

	Unicode:null,

	tagLiterals: false, // custom tag literal support. allows <div></div> kind of (sub-expression) tokens

	// storeCurrentAndFetchNextToken(bool, false, false true) to get just one token
	storeCurrentAndFetchNextToken: function(noRegex, returnValue, stack, _dontStore){
		var regex = !noRegex; // TOFIX :)
		var pos = this.pos;
		var inp = this.inp;
		var shadowInp = this.shadowInp;
		var matchedNewline = false;
		do {
			if (!_dontStore) {
				++this.tokenCount;
				stack.push(returnValue);
				// did the parent Parser throw up?
				if (this.errorEscape) {
					returnValue = this.errorEscape;
					this.errorEscape = null;
					return returnValue;
				}
			}
			_dontStore = false;

			if (pos >= inp.length) {
				returnValue = {start:inp.length,stop:inp.length,name:12/*EOF*/};
				break;
			}
			var returnValue = null;

			var start = pos;
			var chr = inp[pos];

			//							1 ws							2 lt				   3 scmt 4 mcmt 5/6 str 7 nr	 8 rx  9 punc
			//if (true) {
				// substring method (I think this is faster..)
				var part2 = inp.substring(pos,pos+4);
				var part = this.regexBig.exec(part2);
			//} else {
			//	// non-substring method (lastIndex)
			//	// this method does not need a substring to apply it
			//	this.regexBigAlt.lastIndex = pos;
			//	var part = this.regexBigAlt.exec(inp);
			//}

			if (part[1]) { //this.regexWhiteSpace.test(chr)) { // SP, TAB, VT, FF, NBSP, BOM (, TOFIX: USP)
				++pos;
				returnValue = {start:start,stop:pos,name:9/*WHITE_SPACE*/,line:this.line,col:this.column,isWhite:true};
				++this.column;
			} else if (part[2]) { //this.regexLineTerminator.test(chr)) { // LF, CR, LS, PS
				var end = pos+1;
				if (chr=='\r' && inp[pos+1] == '\n') ++end; // support crlf=>lf
				returnValue = {start:pos,stop:end,name:10/*LINETERMINATOR*/,line:this.line,col:this.column,isWhite:true};
				pos = end;
				// mark newlines for ASI
				matchedNewline = true;
				++this.line;
				this.column = 0;
				returnValue.hasNewline = 1;
			} else if (part[3]) { //chr == '/' && inp[pos+1] == '/') {
				pos = shadowInp.indexOf('\n',pos);
				if (pos == -1) pos = inp.length;
				returnValue = {start:start,stop:pos,name:7/*COMMENT_SINGLE*/,line:this.line,col:this.column,isComment:true,isWhite:true};
				this.column = returnValue.stop;
			} else if (part[4]) { //chr == '/' && inp[pos+1] == '*') {
				var newpos = inp.indexOf('*/',pos);
				if (newpos == -1) {
					newpos = shadowInp.indexOf('\n', pos);
					if (newpos < 0) pos += 2;
					else pos = newpos;
					returnValue = {start:start,stop:pos,name:14/*error*/,value:inp.substring(start, pos),line:this.line,col:this.column,isComment:true,isWhite:true,tokenError:true,error:Tokenizer.Error.UnterminatedMultiLineComment};
					this.errorStack.push(returnValue);
				} else {
					pos = newpos+2;
					returnValue = {start:start,stop:pos,name:8/*COMMENT_MULTI*/,value:inp.substring(start, pos),line:this.line,col:this.column,isComment:true,isWhite:true};

					// multi line comments are also reason for asi, but only if they contain at least one newline (use shadow input, because all line terminators would be valid...)
					var shadowValue = shadowInp.substring(start, pos);
					var i = 0, hasNewline = 0;
					while (i < (i = shadowValue.indexOf('\n', i+1))) {
						++hasNewline;
					}
					if (hasNewline) {
						matchedNewline = true;
						returnValue.hasNewline = hasNewline;
						this.line += hasNewline;
						this.column = 0;
					} else {
						this.column = returnValue.stop;
					}
				}
			} else if (part[5]) { //chr == "'") {
				// old method
				//console.log("old method");

				var hasNewline = 0;
				do {
					// process escaped characters
					while (pos < inp.length && inp[++pos] == '\\') {
						if (shadowInp[pos+1] == '\n') ++hasNewline;
						++pos;
					}
					if (this.regexLineTerminator.test(inp[pos])) {
						returnValue = {start:start,stop:pos,name:14/*error*/,value:inp.substring(start, pos),isString:true,tokenError:true,error:Tokenizer.Error.UnterminatedDoubleStringNewline};
						this.errorStack.push(returnValue);
						break;
					}
				} while (pos < inp.length && inp[pos] != "'");
				if (returnValue) {} // error
				else if (inp[pos] != "'") {
					returnValue = {start:start,stop:pos,name:14/*error*/,value:inp.substring(start, pos),isString:true,tokenError:true,error:Tokenizer.Error.UnterminatedDoubleStringOther};
					this.errorStack.push(returnValue);
				} else {
					++pos;
					returnValue = {start:start,stop:pos,name:5/*STRING_SINGLE*/,isPrimitive:true,isString:true};
					if (hasNewline) {
						returnValue.hasNewline = hasNewline;
						this.line += hasNewline;
						this.column = 0;
					} else {
						this.column += (pos-start);
					}
				}
			} else if (part[6]) { //chr == '"') {
				var hasNewline = 0;
				// TODO: something like this: var regexmatch = /([^\']|$)+/.match();
				do {
					// process escaped chars
					while (pos < inp.length && inp[++pos] == '\\') {
						if (shadowInp[pos+1] == '\n') ++hasNewline;
						++pos;
					}
					if (this.regexLineTerminator.test(inp[pos])) {
						returnValue = {start:start,stop:pos,name:14/*error*/,value:inp.substring(start, pos),isString:true,tokenError:true,error:Tokenizer.Error.UnterminatedSingleStringNewline};
						this.errorStack.push(returnValue);
						break;
					}
				} while (pos < inp.length && inp[pos] != '"');
				if (returnValue) {}
				else if (inp[pos] != '"') {
					returnValue = {start:start,stop:pos,name:14/*error*/,value:inp.substring(start, pos),isString:true,tokenError:true,error:Tokenizer.Error.UnterminatedSingleStringOther};
					this.errorStack.push(returnValue);
				} else {
					++pos;
					returnValue = {start:start,stop:pos,name:6/*STRING_DOUBLE*/,isPrimitive:true,isString:true};
					if (hasNewline) {
						returnValue.hasNewline = hasNewline;
						this.line += hasNewline;
						this.column = 0;
					} else {
						this.column += (pos-start);
					}
				}
			} else if (part[7]) { //(chr >= '0' && chr <= '9') || (chr == '.' && inp[pos+1] >= '0' && inp[pos+1] <= '9')) {
				var nextPart = inp.substring(pos, pos+30);
				var match = nextPart.match(this.regexNumber);
				if (match[2]) { // decimal
					var value = match[2];
					var parsingOctal = value[0] == '0' && value[1] && value[1] != 'e' && value[1] != 'E' && value[1] != '.';
					if (parsingOctal) {
						returnValue = {start:start,stop:pos,name:14/*error*/,isNumber:true,isOctal:true,tokenError:true,error:Tokenizer.Error.IllegalOctalEscape,value:value};
						this.errorStack.push(returnValue);
					} else {
						returnValue = {start:start,stop:start+value.length,name:4/*NUMERIC_DEC*/,isPrimitive:true,isNumber:true,value:value};
					}
				} else if (match[1]) { // hex
					var value = match[1];
					returnValue = {start:start,stop:start+value.length,name:3/*NUMERIC_HEX*/,isPrimitive:true,isNumber:true,value:value};
				} else {
					throw 'unexpected parser errror... regex fail :(';
				}

				if (value.length < 300) {
					pos += value.length;
				} else {
					// old method of parsing numbers. only used for extremely long number literals (300+ chars).
					// this method does not require substringing... just memory :)
					var tmpReturnValue = this.oldNumberParser(pos, chr, inp, returnValue, start, Tokenizer);
					pos = tmpReturnValue[0];
					returnValue = tmpReturnValue[1];
				}
			} else if (regex && part[8]) { //chr == '/') { // regex cannot start with /* (would be multiline comment, and not make sense anyways). but if it was /* then an earlier if would have eated it. so we only check for /
				var twinfo = []; // matching {[( info
				var found = false;
				var parens = [];
				var nonLethalError = null;
				while (++pos < inp.length) {
					chr = shadowInp[pos];
					// parse RegularExpressionChar
					if (chr == '\n') {
						returnValue = {start:start,stop:pos,name:14/*error*/,tokenError:true,errorHasContent:true,error:Tokenizer.Error.UnterminatedRegularExpressionNewline};
						this.errorStack.push(returnValue);
						break; // fail
					} else if (chr == '/') {
						found = true;
						break;
					} else if (chr == '?' || chr == '*' || chr == '+') {
						nonLethalError = Tokenizer.Error.NothingToRepeat;
					} else if (chr == '^') {
						if (
							inp[pos-1] != '/' &&
							inp[pos-1] != '|' &&
							inp[pos-1] != '(' &&
							!(inp[pos-3] == '(' && inp[pos-2] == '?' && (inp[pos-1] == ':' || inp[pos-1] == '!' || inp[pos-1] == '='))
						) {
							nonLethalError = Tokenizer.Error.StartOfMatchShouldBeAtStart;
						}
					} else if (chr == '$') {
						if (inp[pos+1] != '/' && inp[pos+1] != '|' && inp[pos+1] != ')') nonLethalError = Tokenizer.Error.DollarShouldBeEnd;
					} else if (chr == '}') {
						nonLethalError = Tokenizer.Error.MissingOpeningCurly;
					} else { // it's a "character" (can be group or class), something to match
						// match parenthesis
						if (chr == '(') {
							parens.push(pos-start);
						} else if (chr == ')') {
							if (parens.length == 0) {
								nonLethalError = {start:start,stop:pos,name:14/*error*/,tokenError:true,error:Tokenizer.Error.RegexNoOpenGroups};
							} else {
								var twin = parens.pop();
								var now = pos-start;
								twinfo[twin] = now;
								twinfo[now] = twin;
							}
						}
						// first process character class
						if (chr == '[') {
							var before = pos-start;
							while (++pos < inp.length && shadowInp[pos] != '\n' && inp[pos] != ']') {
								// only newline is not allowed in class range
								// anything else can be escaped, most of it does not have to be escaped...
								if (inp[pos] == '\\') {
									if (shadowInp[pos+1] == '\n') break;
									else ++pos; // skip next char. (mainly prohibits ] to be picked up as closing the group...)
								}
							}
							if (inp[pos] != ']') {
								returnValue = {start:start,stop:pos,name:14/*error*/,tokenError:true,error:Tokenizer.Error.ClosingClassRangeNotFound};
								this.errorStack.push(returnValue);
								break;
							} else {
								var after = pos-start;
								twinfo[before] = after;
								twinfo[after] = before;
							}
						} else if (chr == '\\' && shadowInp[pos+1] != '\n') {
							// is ok anywhere in the regex (match next char literally, regardless of its otherwise special meaning)
							++pos;
						}

						// now process repeaters (+, ? and *)

						// non-collecting group (?:...) and positive (?=...) or negative (?!...) lookahead
						if (chr == '(') {
							if (inp[pos+1] == '?' && (inp[pos+2] == ':' || inp[pos+2] == '=' || inp[pos+2] == '!')) {
								pos += 2;
							}
						}
						// matching "char"
						else if (inp[pos+1] == '?') ++pos;
						else if (inp[pos+1] == '*' || inp[pos+1] == '+') {
							++pos;
							if (inp[pos+1] == '?') ++pos; // non-greedy match
						} else if (inp[pos+1] == '{') {
							pos += 1;
							var before = pos-start;
							// quantifier:
							// - {n}
							// - {n,}
							// - {n,m}
							if (!/[0-9]/.test(inp[pos+1])) {
								nonLethalError = Tokenizer.Error.QuantifierRequiresNumber;
							}
							while (++pos < inp.length && /[0-9]/.test(inp[pos+1]));
							if (inp[pos+1] == ',') {
								++pos;
								while (pos < inp.length && /[0-9]/.test(inp[pos+1])) ++pos;
							}
							if (inp[pos+1] != '}') {
								nonLethalError = Tokenizer.Error.QuantifierRequiresClosingCurly;
							} else {
								++pos;
								var after = pos-start;
								twinfo[before] = after;
								twinfo[after] = before;
								if (inp[pos+1] == '?') ++pos; // non-greedy match
							}
						}
					}
				}
				// if found=false, fail right now. otherwise try to parse an identifiername (that's all RegularExpressionFlags is..., but it's constructed in a stupid fashion)
				if (!found || returnValue) {
					if (!returnValue) {
						returnValue = {start:start,stop:pos,name:14/*error*/,tokenError:true,error:Tokenizer.Error.UnterminatedRegularExpressionOther};
						this.errorStack.push(returnValue);
					}
				} else {
					// this is the identifier scanner, for now
					do ++pos;
					while (pos < inp.length && this.hashAsciiIdentifier[inp[pos]]); /*this.regexAsciiIdentifier.test(inp[pos])*/

					if (parens.length) {
						// nope, this is still an error, there was at least one paren that did not have a matching twin
						if (parens.length > 0) returnValue = {start:start,stop:pos,name:14/*error*/,tokenError:true,error:Tokenizer.Error.RegexOpenGroup};
						this.errorStack.push(returnValue);
					} else if (nonLethalError) {
						returnValue = {start:start,stop:pos,name:14/*error*/,errorHasContent:true,tokenError:true,error:nonLethalError};
						this.errorStack.push(returnValue);
					} else {
						returnValue = {start:start,stop:pos,name:1/*REG_EX*/,isPrimitive:true};
					}
				}
				returnValue.twinfo = twinfo;
			} else if (regex && part[9] && this.tagLiterals) {
				// allows you to use this literally (in places where an expression is allowed) in js:

				// simple tag:
				// <div></div>

				// tree, unary, content, multiline:
				// <foo> <bar>hello </bar> <baz/>
				// </foo>

				// attributes, default true attributes, single and double quotes:
				// <gah this="an" attribute single='quote'/>

				// dynamic content (content normally parsed as js in a sub-parser):
				// <div>{["hello","world"].join(' ')}</div>

				// escaping content with single backslash
				// <div>hah\&lt;\<a{"foo\u0500t\t"+"bar"}</div>

				// note: tag content is escaped (one slash removed), js content is not
				// currently not really possible to use } or > in js code unless you
				// can somehow prefix them with a backslash (strings, regex)
				// if you must have these otherwise the fallback is eval

				var invalidTag = false;

				var processValue = function(val){
					// post process dynamic parts of this value
					// anything wrapped in (unescaped) { and } is considered to be
					// a literal js expression. so we should parse an expression here
					// and that's where the voodoo inception starts. we must now
					// invoke a new instance of ZeParser, make it read an
					// expression and ensure the next char is the closing curly.
					// only then is it deemed valid.

					// ...
					// too difficult for now. let's just go with "escape all teh curlies!"

					var arrtxtjs = []; // uneven array. uneven elements are text, even elements are js

					var last = 0;
					for (var i=0; i<val.length; ++i) {
						if (val[i] == '\\') ++i;
						else if (val[i] == '{') {
							for (var j=i; j<val.length; ++j) {
								if (val[j] == '\\') ++j;
								else if (val[j] == '}') {
									var js = val.slice(i+1, j);
									arrtxtjs.push(
										val.slice(last, i),
										js
									);
									break;
								}
							}
							i = j;
							last = j + 1;
						}
					}
					// remainder (can be empty string)
					arrtxtjs.push(val.slice(last, i));

					if (arrtxtjs.length > 1) { // if we did find any dynamic js block...
						for (var i=1; i<arrtxtjs.length; i+=2) {
							arrtxtjs[i] = arrtxtjs[i].replace(this.regexRemoveEscape, '$1'); // remove a single backslash from the content (it was used as an escape character)
						}
						return arrtxtjs; // return array with [string,js,string,js,...]
					} else { // no dynamic js found, return a string
						val = arrtxtjs[0].replace(this.regexRemoveEscape, '$1'); // remove a single backslash from the content (it was used as an escape character)
						return val;
					}
				};

				var tagOpen = function(node){
					var regexTagName = this.regexTagName;
					regexTagName.lastIndex = pos+1;
					var tag = regexTagName.exec(inp);
					if (tag) {
						pos = regexTagName.lastIndex;
						node.name = tag[1];
						node.attributes = {};

						// now fetch all attribute=value pairs
						var regexTagAttributes = this.regexTagAttributes;
						var attr = '';
						var lastIndex = pos = regexTagAttributes.lastIndex = regexTagName.lastIndex;
						attr = regexTagAttributes.exec(inp);
						while (attr && attr.index == pos) {
							if (typeof attr[2] == 'undefined') {
								// attribute without value assignment (implicit "true")
								node.attributes[attr[1]] = attr[3];
							} else {
								node.attributes[attr[1]] = processValue.call(this, attr[2]);
							}
							pos = lastIndex = regexTagAttributes.lastIndex;
							attr = regexTagAttributes.exec(inp);
						}

						// it was a unary tag
						var regexTagUnarySuffix = this.regexTagUnarySuffix;
						regexTagUnarySuffix.lastIndex = lastIndex;
						var x = regexTagUnarySuffix.exec(inp);
						node.unary = !!x && x.index == pos;
						if (node.unary) {
							pos = regexTagUnarySuffix.lastIndex;
							return true;
						}
						// it was a binary tag
						var regexTagBinarySuffix = this.regexTagBinarySuffix;
						regexTagBinarySuffix.lastIndex = lastIndex;
						var x = regexTagBinarySuffix.exec(inp);

						if (x && x.index == pos) {
							node.children = [];
							// now parse strings and other tags until you find a closing tag on the same level...
							pos = regexTagBinarySuffix.lastIndex;
							return true;
						}
						// unclosed start tag, like a statement: `<foo`
						invalidTag = true;
						return false;
					} else {
						// could not parse an open tag
						invalidTag = true;
						return false;
					}
				}.bind(this);

				var tagBody = function(node){
					do {
						var start = pos;

						var regexTagBody = this.regexTagBody;
						regexTagBody.lastIndex = pos;
						var text = regexTagBody.exec(inp);
						if (text && text[1]) {
							var txt = processValue(text[1]);
//			  var txt = text[1].replace(this.regexRemoveEscape, '$1'); // remove a single backslash from the content (it was used as an escape character)
							node.children.push(txt);
							pos = regexTagBody.lastIndex;
						}

						if (inp[pos] == '<') {
							var regexTagOpenOrClose = this.regexTagOpenOrClose;
							regexTagOpenOrClose.lastIndex = pos;
							var x = regexTagOpenOrClose.exec(inp);
							if (x && x.index == pos) {
								return node; // end of body
							}
							var resultTag = tag({});
							node.children.push(resultTag);
							if (resultTag.hadError) return false;
						}
					} while (start != pos);
				}.bind(this);

				var tagClose = function(node){
					var regexTagClose = this.regexTagClose;
					regexTagClose.lastIndex = pos;
					var ctag = regexTagClose.exec(inp);
					if (ctag) {
						pos = regexTagClose.lastIndex;
						if (node.name == ctag[1]) return true;
						return false; // was not expecting to close this tag
					}

					// tagClose should only be called if the next chars are starting a closing tag...
					return false;
				}.bind(this);

				var tag = function(node){
					if (!tagOpen(node)) {
						invalidTag = true;
						node.hadError = true;
						return node;
					}
					if (!node.unary) {
						if (!tagBody(node)) {
							invalidTag = true;
							node.hadError = true;
							return node;
						}
						if (!tagClose(node)) {
							invalidTag = true;
							node.hadError = true;
							return node;
						}
					}
					return node;
				}.bind(this);

				var root = tag({});
				returnValue = {start:start,stop:pos,name:15/*TAG*/,isPrimitive:true,root:root,invalidTag:invalidTag};

				if (invalidTag) this.errorStack.push(returnValue);
			} else {
				// note: operators need to be ordered from longest to smallest. regex will take care of the rest.
				// no need to worry about div vs regex. if looking for regex, earlier if will have eaten it
				//var result = this.regexPunctuators.exec(inp.substring(pos,pos+4));

				// note: due to the regex, the single / or < might be caught by an earlier part of the regex. so check for that.
				var result = part[8] || part[9] || part[10];
				if (result) {
					//result = result[1];
					returnValue = {start:pos,stop:pos+=result.length,name:11/*PUNCTUATOR*/,value:result};
				} else {
					var found = false;
					// identifiers cannot start with a number. but if the leading string would be a number, another if would have eaten it already for numeric literal :)
					while (pos < inp.length) {
						var c = inp[pos];

						if (this.hashAsciiIdentifier[c]) ++pos; //if (this.regexAsciiIdentifier.test(c)) ++pos;
						else if (c == '\\' && this.regexUnicodeEscape.test(inp.substring(pos,pos+6))) pos += 6; // this is like a \uxxxx
						// ok, now test unicode ranges...
						// basically this hardly ever happens so there's little risk of this hitting performance
						// however, if you do happen to have used them, it's not a problem. the parser will support it :)
						else if (this.Unicode) { // the unicode is optional.
							// these chars may not be part of identifier. i want to try to prevent running the unicode regexes here...
							if (this.hashIdentifierStop[c] /*this.regexIdentifierStop.test(c)*/) break;
							// for most scripts, the code wont reach here. which is good, because this is going to be relatively slow :)
							var Unicode = this.Unicode; // cache
							if (!(
									// these may all occur in an identifier... (pure a specification compliance thing :)
									Unicode.Lu.test(c) || Unicode.Ll.test(c) || Unicode.Lt.test(c) || Unicode.Lm.test(c) ||
									Unicode.Lo.test(c) || Unicode.Nl.test(c) || Unicode.Mn.test(c) || Unicode.Mc.test(c) ||
									Unicode.Nd.test(c) || Unicode.Pc.test(c) || Unicode.sp.test(c)
							)) break; // end of match.
							// passed, next char
							++pos;
						} else break; // end of match.

						found = true;
					}

					if (found) {
						returnValue = {start:start,stop:pos,name:2/*IDENTIFIER*/,value:inp.substring(start,pos)};
						if (returnValue.value == 'undefined' || returnValue.value == 'null' || returnValue.value == 'true' || returnValue.value == 'false') returnValue.isPrimitive = true;
					} else {
						if (inp[pos] == '`') {
							returnValue = {start:start,stop:pos+1,name:14/*error*/,tokenError:true,error:Tokenizer.Error.BacktickNotSupported};
							this.errorStack.push(returnValue);
						} else if (inp[pos] == '\\') {
							if (inp[pos+1] == 'u') {
								returnValue = {start:start,stop:pos+1,name:14/*error*/,tokenError:true,error:Tokenizer.Error.InvalidUnicodeEscape};
								this.errorStack.push(returnValue);
							} else {
								returnValue = {start:start,stop:pos+1,name:14/*error*/,tokenError:true,error:Tokenizer.Error.InvalidBackslash};
								this.errorStack.push(returnValue);
							}
						} else {
							returnValue = {start:start,stop:pos+1,name:14/*error*/,tokenError:true,error:Tokenizer.Error.Unknown,value:c};
							this.errorStack.push(returnValue);
							// try to skip this char. it's not going anywhere.
						}
						++pos;
					}
				}
			}

			if (returnValue) {
				// note that ASI's and errors are slipstreamed in here from the parser since the tokenizer cant determine that
				// if this part ever changes, make sure you change that too :) (see also this.addTokenToStreamBefore)
				returnValue.tokposw = this.wtree.length;
				this.wtree.push(returnValue);
				if (!returnValue.isWhite) {
					returnValue.tokposb = this.btree.length;
					this.btree.push(returnValue);
				}
			}


		} while (returnValue && returnValue.isWhite); // WHITE_SPACE LINETERMINATOR COMMENT_SINGLE COMMENT_MULTI
		++this.tokenCountNoWhite;

		this.pos = pos;

		if (matchedNewline) returnValue.newline = true;
		return returnValue;
	},
	// used by ASI and error stuff (in parser)
	addTokenToStreamBefore: function(token, match){
		var wtree = this.wtree;
		var btree = this.btree;
		if (match.name == 12/*asi*/) {
			token.tokposw = wtree.length;
			wtree.push(token);
			token.tokposb = btree.length;
			btree.push(token);
		} else {
			token.tokposw = match.tokposw;
			wtree[token.tokposw] = token;
			match.tokposw += 1;
			wtree[match.tokposw] = match;

			if (match.tokposb) {
				token.tokposb = match.tokposb;
				btree[token.tokposb] = token;
				match.tokposb += 1;
				btree[match.tokposb] = match;
			}
		}
	},
	// (unused) replaces the range of tokens in the
	// white and black streams with the specified token.
	replaceTokensInStreamWithToken: function(token, wfrom, wto, bfrom, bto){
		this.wtree.splice(wfrom, wto-wfrom, token);
		this.btree.splice(bfrom, bto-bfrom, token);
	},
	parseCurlyMethodLiteral: function(match){
		var error = false;
		var pos = this.pos;
		// match should be an opening curly with no preceeding newline
		if (match.hasNewline) {
			// so this is bad because if we would not demand this, the language could
			// be amibiguous with a block
			error = 'CurlyMethodsMayNotFollowNewline';
		} else {
			var input = this.inp;

			// remember number of curlies, you'll want that many closers as well
			var curlies = 1;
			while (input[pos] == '{') {
				++pos;
				++curlies;
			}

			// keep parsing characters until you reach a curly.
			// backslashes may only escape backslashes or curlies
			while (!error && pos < input.length && input[pos] != '}') {
				if (input[pos] == '{') {
					error = CurlyMethodsCannotContainOpeningCurly;
				} else if (input[pos] == '\\') {
					if (input[pos+1] != '{' && input[pos+1] != '}' && input[pos+1] != '\\') {
						error = 'CurlyMethodsMayOnlyEscapeCurlies';
					} else {
						// skip curly or backslash
						++pos;
					}
				}
				++pos;
			}

			if (!error) {
				if (pos >= input.length) {
					error = 'CurlyMethodsUnexpectedEof';
				} else {
					var n = curlies;
					while (n && pos<input.length) {
						if (input[pos] == '}') {
							++pos;
							--n;
						} else {
							break;
						}
					}
//					while (n-- && pos<=input.length && input[pos++] == '}') console.log('yes');

					if (pos>input.length) error = 'CurlyMethodsUnexpectedEof';
					else if (n) error = 'CurlyMethodsWasOpenedWithMoreCurliesThanClosed';
				}
			}
			if (!error) {
				// transform this match to a CURLY_METHOD instead of the opening curly it was
				match.name = this.CURLY_METHOD;
				match.stop = pos;
				match.value = this.inp.slice(match.start,pos);
				match.curlies = curlies;

				this.pos = pos;
			}
		}

		if (error) {
			this.addTokenToStreamBefore(
				{
					start: match.start,
					stop:  pos,
					name:  this.ERROR,
					tokenError:true,
					error: Tokenizer.Error.NumberExponentRequiresDigits
				},
				match
			);
		}
	},
	oldNumberParser: function(pos, chr, inp, returnValue, start, Tokenizer){
		++pos;
		// either: 0x 0X 0 .3
		if (chr == '0' && (inp[pos] == 'x' || inp[pos] == 'X')) {
			// parsing hex
			while (++pos < inp.length && this.hashHex[inp[pos]]); // this.regexHex.test(inp[pos]));
			returnValue = {start:start,stop:pos,name:3/*NUMERIC_HEX*/,isPrimitive:true,isNumber:true};
		} else {
			var parsingOctal = chr == '0' && inp[pos] >= '0' && inp[pos] <= '9';
			// parsing dec
			if (chr != '.') { // integer part
				while (pos < inp.length && inp[pos] >= '0' && inp[pos] <= '9') ++pos;
				if (inp[pos] == '.') ++pos;
			}
			// decimal part
			while (pos < inp.length && inp[pos] >= '0' && inp[pos] <= '9') ++pos;
			// exponent part
			if (inp[pos] == 'e' || inp[pos] == 'E') {
				if (inp[++pos] == '+' || inp[pos] == '-') ++pos;
				var expPosBak = pos;
				while (pos < inp.length && inp[pos] >= '0' && inp[pos] <= '9') ++pos;
				if (expPosBak == pos) {
					returnValue = {start:start,stop:pos,name:14/*error*/,tokenError:true,error:Tokenizer.Error.NumberExponentRequiresDigits};
					this.errorStack.push(returnValue);
				}
			}
			if (returnValue.name != 14/*error*/) {
				if (parsingOctal) {
					returnValue = {start:start,stop:pos,name:14/*error*/,isNumber:true,isOctal:true,tokenError:true,error:Tokenizer.Error.IllegalOctalEscape};
					this.errorStack.push(returnValue);
					console.log("foo")
				} else {
					returnValue = {start:start,stop:pos,name:4/*NUMERIC_DEC*/,isPrimitive:true,isNumber:true};
				}
			}
		}
		return [pos, returnValue];
	},
	tokens: function(arrx){
		arrx = arrx || [];
		var n = 0;
		var last;
		var stack = [];
		while ((last = this.storeCurrentAndFetchNextToken(!arrx[n++], false, false, true)) && last.name != 12/*EOF*/) stack.push(last);
		return stack;
	},
	fixValues: function(){
		this.wtree.forEach(function(t){
			if (!t.value) t.value = this.inp.substring(t.start, t.stop);
		},this);
	}
};

//#ifdef TEST_SUITE
Tokenizer.escape = function(s){
	return s.replace(/\n/g,'\\n').replace(/\t/g,'\\t').replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/\uFFFF/g, '\\uFFFF').replace(/\s/g, function(s){
		// replace whitespace as is...
		var ord = s.charCodeAt(0).toString(16);
		switch (ord.length) {
			case 1: ord = '000'+ord; break;
			case 2: ord = '00'+ord; break;
			case 3: ord = '0'+ord; break;
		}
		return '\\u'+ord;
	});
};
Tokenizer.testSuite = function(arr){
	var out = document.createElement('pre');
	document.body.appendChild(out);
	var debug = function(){
		var f = document.createElement('div');
		f.innerHTML = Array.prototype.slice.call(arguments).join(' ');
		out.appendChild(f);
		return arguments[0];
	};

	debug("Running test suite...",arr.length,"tests");
	debug(' ');
	var start = +new Date;
	var ok = 0;
	var fail = 0;
	for (var i=0; i<arr.length; ++i) {
		var test = arr[i], result;
		var input = test[0];
		var outputLen = test[1].length ? test[1][0] : test[1];
		var regexHints = test[3] ? test[2] : null; // if flags, then len=4
		var desc = test[3] || test[2];

		var result = new Tokenizer(input).tokens(regexHints); // regexHints can be null, that's ok
		if (result.length == outputLen) {
			debug('<span class="green">Test '+i+' ok:</span>',desc);
			++ok;
		} else {
			debug('<b class="red">Test failed:</span>',desc,'(found',result.length,'expected',outputLen+')'),console.log(desc, result);
			++fail;
		}
		debug('<b>'+Tokenizer.escape(input)+'</b>');
		debug('<br/>');
	}
	debug("Tokenizer test suite finished ("+(+new Date - start)+' ms). ok:'+ok+', fail:'+fail);
};
//#endif

Tokenizer.regexWhiteSpace = /[ \t\u000B\u000C\u00A0\uFFFF]/;
Tokenizer.regexLineTerminator = /[\u000A\u000D\u2028\u2029]/;
Tokenizer.regexAsciiIdentifier = /[a-zA-Z0-9\$_]/;
Tokenizer.hashAsciiIdentifier = {_:1,$:1,a:1,b:1,c:1,d:1,e:1,f:1,g:1,h:1,i:1,j:1,k:1,l:1,m:1,n:1,o:1,p:1,q:1,r:1,s:1,t:1,u:1,v:1,w:1,x:1,y:1,z:1,A:1,B:1,C:1,D:1,E:1,F:1,G:1,H:1,I:1,J:1,K:1,L:1,M:1,N:1,O:1,P:1,Q:1,R:1,S:1,T:1,U:1,V:1,W:1,X:1,Y:1,Z:1,0:1,1:1,2:1,3:1,4:1,5:1,6:1,7:1,8:1,9:1};
Tokenizer.regexHex = /[0-9A-Fa-f]/;
Tokenizer.hashHex = {0:1,1:1,2:1,3:1,4:1,5:1,6:1,7:1,8:1,9:1,a:1,b:1,c:1,d:1,e:1,f:1,A:1,B:1,C:1,D:1,E:1,F:1};
Tokenizer.regexUnicodeEscape = /u[0-9A-Fa-f]{4}/; // the \ is already checked at usage...
Tokenizer.regexIdentifierStop = /[\>\=\!\|\<\+\-\&\*\%\^\/\{\}\(\)\[\]\.\;\,\~\?\:\ \t\n\\\'\"]/;
Tokenizer.hashIdentifierStop = {'>':1,'=':1,'!':1,'|':1,'<':1,'+':1,'-':1,'&':1,'*':1,'%':1,'^':1,'/':1,'{':1,'}':1,'(':1,')':1,'[':1,']':1,'.':1,';':1,',':1,'~':1,'?':1,':':1,'\\':1,'\'':1,'"':1,' ':1,'\t':1,'\n':1};
Tokenizer.regexNewline = /\n/g;
//Tokenizer.regexPunctuators = /^(>>>=|===|!==|>>>|<<=|>>=|<=|>=|==|!=|\+\+|--|<<|>>|\&\&|\|\||\+=|-=|\*=|%=|\&=|\|=|\^=|\/=|\{|\}|\(|\)|\[|\]|\.|;|,|<|>|\+|-|\*|%|\||\&|\||\^|!|~|\?|:|=|\/)/;
Tokenizer.Unidocde = window.Unicode;
Tokenizer.regexNumber = /^(?:(0[xX][0-9A-Fa-f]+)|((?:(?:(?:(?:[0-9]+)(?:\.[0-9]*)?))|(?:\.[0-9]+))(?:[eE][-+]?[0-9]{1,})?))/;
Tokenizer.regexNormalizeNewlines = /(\u000D[^\u000A])|[\u2028\u2029]/;
// tag parsing regex
						 // ws   name (must start with non-number-or-dash)
Tokenizer.regexTagName = /[^\S]*([a-zA-Z][a-zA-Z0-9-]*)/g;
								// ws   attrname			 "..[\"].."						   '..[\']..'
Tokenizer.regexTagAttributes = /[^\S]+([a-zA-Z0-9-]+)(?:=(?:(?:"((?:(?:\\.)|(?:[^"]))*?)")|(?:'((?:(?:\\')|(?:[^']))*?)')))?/g;
								// ws  />
Tokenizer.regexTagUnarySuffix = /[^\S]*\/[^\S]*>/g;
								// ws >
Tokenizer.regexTagBinarySuffix = /[^\S]*?>/g;
								// anything as long as its not a <, unless preceeded by \
Tokenizer.regexTagBody = /((?:(?:\\.)|(?:[^<]))*)/g;
								// < ws /> / (?? TOFIX not sure whether this is correct or intentional...)
Tokenizer.regexTagOpenOrClose = /<[^\S]*[\/>]*\//g;
								// < ws / ws name ws >
Tokenizer.regexTagClose = /<[^\S]*\/[^\S]*([a-zA-Z][a-zA-Z0-9-]*)[^\S]*>/g;
							  // backslash with either a non-backslash following or the EOL following
Tokenizer.regexRemoveEscape = /\\(?:([^\\])|$)/g;


//					  1 ws							2 lt						3 scmt 4 mcmt 5/6 str 7 nr	   8 rx		 9 dom		10 punc
Tokenizer.regexBig = /^([ \t\u000B\u000C\u00A0\uFFFF])?([\u000A\u000D\u2028\u2029])?(\/\/)?(\/\*)?(')?(")?(\.?[0-9])?(?:(\/)[^=])?(?:(<)[^<=])?(>>>=|===|!==|>>>|<<=|>>=|<=|>=|==|!=|\+\+|--|<<|>>|\&\&|\|\||\+=|-=|\*=|%=|\&=|\|=|\^=|\/=|\{|\}|\(|\)|\[|\]|\.|;|,|<|>|\+|-|\*|%|\||\&|\||\^|!|~|\?|:|=|\/)?/;
Tokenizer.regexBigAlt = /([ \t\u000B\u000C\u00A0\uFFFF])?([\u000A\u000D\u2028\u2029])?(\/\/)?(\/\*)?(')?(")?(\.?[0-9])?(?:(\/)[^=])?(>>>=|===|!==|>>>|<<=|>>=|<=|>=|==|!=|\+\+|--|<<|>>|\&\&|\|\||\+=|-=|\*=|%=|\&=|\|=|\^=|\/=|\{|\}|\(|\)|\[|\]|\.|;|,|<|>|\+|-|\*|%|\||\&|\||\^|!|~|\?|:|=|\/)?/g;

Tokenizer.Error = {
	UnterminatedSingleStringNewline: {msg:'Newlines are not allowed in string literals'},
	UnterminatedSingleStringOther: {msg:'Unterminated single string'},
	UnterminatedDoubleStringNewline: {msg:'Newlines are not allowed in string literals'},
	UnterminatedDoubleStringOther: {msg:'Unterminated double string'},
	UnterminatedRegularExpressionNewline: {msg:'Newlines are not allowed in regular expressions'},
	NothingToRepeat: {msg:'Used a repeat character (*?+) in a regex without something prior to it to match'},
	ClosingClassRangeNotFound: {msg: 'Unable to find ] for class range'},
	RegexOpenGroup: {msg: 'Open group did not find closing parenthesis'},
	RegexNoOpenGroups: {msg: 'Closing parenthesis found but no group open'},
	UnterminatedRegularExpressionOther: {msg:'Unterminated regular expression'},
	UnterminatedMultiLineComment: {msg:'Unterminated multi line comment'},
	UnexpectedIdentifier: {msg:'Unexpected identifier'},
	IllegalOctalEscape: {msg:'Octal escapes are not valid'},
	Unknown: {msg:'Unknown input'}, // if this happens, my parser is bad :(
	NumberExponentRequiresDigits: {msg:'Numbers with exponents require at least one digit after the `e`'},
	BacktickNotSupported: {msg:'The backtick is not used in js, maybe you copy/pasted from a fancy site/doc?'},
	InvalidUnicodeEscape: {msg:'Encountered an invalid unicode escape, must be followed by exactly four hex numbers'},
	InvalidBackslash: {msg:'Encountered a backslash where it not allowed'},
	StartOfMatchShouldBeAtStart: {msg: 'The ^ signifies the start of match but was not found at a start'},
	DollarShouldBeEnd: {msg: 'The $ signifies the stop of match but was not found at a stop'},
	QuantifierRequiresNumber: {msg:'Quantifier curly requires at least one digit before the comma'},
	QuantifierRequiresClosingCurly: {msg:'Quantifier curly requires to be closed'},
	MissingOpeningCurly: {msg:'Encountered closing quantifier curly without seeing an opening curly'},
	CurlyMethodsMayNotFollowNewline: {msg:'There may not be any newlines between the expression and the curly method'},
	CurlyMethodsMayOnlyEscapeCurlies: {msg:'You may only escape curlies {} and backslashes in curly methods'},
	CurlyMethodsCannotContainOpeningCurly: {msg:'There\'s no way an opening curly could be part of a curly method, yet'},
	CurlyMethodsWasOpenedWithMoreCurliesThanClosed: {msg:'The curly method must be closed with as many curlies as it was started with'},
	CurlyMethodsUnexpectedEof: {msg:'Encountered EOF while parsing a curly method'},
};