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parallaxis/node_modules/zeparser/Tokenizer.js

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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'},
};
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