', start: 8, end: 13},
* // {name: 'match', value: '
an
', start: 13, end: 27},
* // {name: 'right', value: '
', start: 27, end: 33},
* // {name: 'between', value: ' example', start: 33, end: 41}
* // ]
*
* // Omitting unneeded parts with null valueNames, and using escapeChar
* str = '...{1}\\{{function(x,y){return y+x;}}';
* XRegExp.matchRecursive(str, '{', '}', 'g', {
* valueNames: ['literal', null, 'value', null],
* escapeChar: '\\'
* });
* // -> [
* // {name: 'literal', value: '...', start: 0, end: 3},
* // {name: 'value', value: '1', start: 4, end: 5},
* // {name: 'literal', value: '\\{', start: 6, end: 8},
* // {name: 'value', value: 'function(x,y){return y+x;}', start: 9, end: 35}
* // ]
*
* // Sticky mode via flag y
* str = '<1><<<2>>><3>4<5>';
* XRegExp.matchRecursive(str, '<', '>', 'gy');
* // -> ['1', '<<2>>', '3']
*/
XRegExp.matchRecursive = function (str, left, right, flags, options) {
flags = flags || "";
options = options || {};
var global = flags.indexOf("g") > -1,
sticky = flags.indexOf("y") > -1,
basicFlags = flags.replace(/y/g, ""), // Flag y controlled internally
escapeChar = options.escapeChar,
vN = options.valueNames,
output = [],
openTokens = 0,
delimStart = 0,
delimEnd = 0,
lastOuterEnd = 0,
outerStart,
innerStart,
leftMatch,
rightMatch,
esc;
left = XRegExp(left, basicFlags);
right = XRegExp(right, basicFlags);
if (escapeChar) {
if (escapeChar.length > 1) {
throw new SyntaxError("can't use more than one escape character");
}
escapeChar = XRegExp.escape(escapeChar);
// Using XRegExp.union safely rewrites backreferences in `left` and `right`
esc = new RegExp(
"(?:" + escapeChar + "[\\S\\s]|(?:(?!" + XRegExp.union([left, right]).source + ")[^" + escapeChar + "])+)+",
flags.replace(/[^im]+/g, "") // Flags gy not needed here; flags nsx handled by XRegExp
);
}
while (true) {
// If using an escape character, advance to the delimiter's next starting position,
// skipping any escaped characters in between
if (escapeChar) {
delimEnd += (XRegExp.exec(str, esc, delimEnd, "sticky") || [""])[0].length;
}
leftMatch = XRegExp.exec(str, left, delimEnd);
rightMatch = XRegExp.exec(str, right, delimEnd);
// Keep the leftmost match only
if (leftMatch && rightMatch) {
if (leftMatch.index <= rightMatch.index) {
rightMatch = null;
} else {
leftMatch = null;
}
}
/* Paths (LM:leftMatch, RM:rightMatch, OT:openTokens):
LM | RM | OT | Result
1 | 0 | 1 | loop
1 | 0 | 0 | loop
0 | 1 | 1 | loop
0 | 1 | 0 | throw
0 | 0 | 1 | throw
0 | 0 | 0 | break
* Doesn't include the sticky mode special case
* Loop ends after the first completed match if `!global` */
if (leftMatch || rightMatch) {
delimStart = (leftMatch || rightMatch).index;
delimEnd = delimStart + (leftMatch || rightMatch)[0].length;
} else if (!openTokens) {
break;
}
if (sticky && !openTokens && delimStart > lastOuterEnd) {
break;
}
if (leftMatch) {
if (!openTokens) {
outerStart = delimStart;
innerStart = delimEnd;
}
++openTokens;
} else if (rightMatch && openTokens) {
if (!--openTokens) {
if (vN) {
if (vN[0] && outerStart > lastOuterEnd) {
output.push(row(vN[0], str.slice(lastOuterEnd, outerStart), lastOuterEnd, outerStart));
}
if (vN[1]) {
output.push(row(vN[1], str.slice(outerStart, innerStart), outerStart, innerStart));
}
if (vN[2]) {
output.push(row(vN[2], str.slice(innerStart, delimStart), innerStart, delimStart));
}
if (vN[3]) {
output.push(row(vN[3], str.slice(delimStart, delimEnd), delimStart, delimEnd));
}
} else {
output.push(str.slice(innerStart, delimStart));
}
lastOuterEnd = delimEnd;
if (!global) {
break;
}
}
} else {
throw new Error("string contains unbalanced delimiters");
}
// If the delimiter matched an empty string, avoid an infinite loop
if (delimStart === delimEnd) {
++delimEnd;
}
}
if (global && !sticky && vN && vN[0] && str.length > lastOuterEnd) {
output.push(row(vN[0], str.slice(lastOuterEnd), lastOuterEnd, str.length));
}
return output;
};
}(XRegExp));
/***** build.js *****/
/*!
* XRegExp.build v0.1.0
* (c) 2012 Steven Levithan