Index: frontend/node_modules/esquery/parser.js
===================================================================
--- frontend/node_modules/esquery/parser.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/esquery/parser.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,2941 @@
+/*
+ * Generated by PEG.js 0.10.0.
+ *
+ * http://pegjs.org/
+ */
+(function(root, factory) {
+  if (typeof define === "function" && define.amd) {
+    define([], factory);
+  } else if (typeof module === "object" && module.exports) {
+    module.exports = factory();
+  }
+})(this, function() {
+  "use strict";
+
+  function peg$subclass(child, parent) {
+    function ctor() { this.constructor = child; }
+    ctor.prototype = parent.prototype;
+    child.prototype = new ctor();
+  }
+
+  function peg$SyntaxError(message, expected, found, location) {
+    this.message  = message;
+    this.expected = expected;
+    this.found    = found;
+    this.location = location;
+    this.name     = "SyntaxError";
+
+    if (typeof Error.captureStackTrace === "function") {
+      Error.captureStackTrace(this, peg$SyntaxError);
+    }
+  }
+
+  peg$subclass(peg$SyntaxError, Error);
+
+  peg$SyntaxError.buildMessage = function(expected, found) {
+    var DESCRIBE_EXPECTATION_FNS = {
+          literal: function(expectation) {
+            return "\"" + literalEscape(expectation.text) + "\"";
+          },
+
+          "class": function(expectation) {
+            var escapedParts = "",
+                i;
+
+            for (i = 0; i < expectation.parts.length; i++) {
+              escapedParts += expectation.parts[i] instanceof Array
+                ? classEscape(expectation.parts[i][0]) + "-" + classEscape(expectation.parts[i][1])
+                : classEscape(expectation.parts[i]);
+            }
+
+            return "[" + (expectation.inverted ? "^" : "") + escapedParts + "]";
+          },
+
+          any: function(expectation) {
+            return "any character";
+          },
+
+          end: function(expectation) {
+            return "end of input";
+          },
+
+          other: function(expectation) {
+            return expectation.description;
+          }
+        };
+
+    function hex(ch) {
+      return ch.charCodeAt(0).toString(16).toUpperCase();
+    }
+
+    function literalEscape(s) {
+      return s
+        .replace(/\\/g, '\\\\')
+        .replace(/"/g,  '\\"')
+        .replace(/\0/g, '\\0')
+        .replace(/\t/g, '\\t')
+        .replace(/\n/g, '\\n')
+        .replace(/\r/g, '\\r')
+        .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+        .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
+    }
+
+    function classEscape(s) {
+      return s
+        .replace(/\\/g, '\\\\')
+        .replace(/\]/g, '\\]')
+        .replace(/\^/g, '\\^')
+        .replace(/-/g,  '\\-')
+        .replace(/\0/g, '\\0')
+        .replace(/\t/g, '\\t')
+        .replace(/\n/g, '\\n')
+        .replace(/\r/g, '\\r')
+        .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+        .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
+    }
+
+    function describeExpectation(expectation) {
+      return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
+    }
+
+    function describeExpected(expected) {
+      var descriptions = new Array(expected.length),
+          i, j;
+
+      for (i = 0; i < expected.length; i++) {
+        descriptions[i] = describeExpectation(expected[i]);
+      }
+
+      descriptions.sort();
+
+      if (descriptions.length > 0) {
+        for (i = 1, j = 1; i < descriptions.length; i++) {
+          if (descriptions[i - 1] !== descriptions[i]) {
+            descriptions[j] = descriptions[i];
+            j++;
+          }
+        }
+        descriptions.length = j;
+      }
+
+      switch (descriptions.length) {
+        case 1:
+          return descriptions[0];
+
+        case 2:
+          return descriptions[0] + " or " + descriptions[1];
+
+        default:
+          return descriptions.slice(0, -1).join(", ")
+            + ", or "
+            + descriptions[descriptions.length - 1];
+      }
+    }
+
+    function describeFound(found) {
+      return found ? "\"" + literalEscape(found) + "\"" : "end of input";
+    }
+
+    return "Expected " + describeExpected(expected) + " but " + describeFound(found) + " found.";
+  };
+
+  function peg$parse(input, options) {
+    options = options !== void 0 ? options : {};
+
+    var peg$FAILED = {},
+
+        peg$startRuleFunctions = { start: peg$parsestart },
+        peg$startRuleFunction  = peg$parsestart,
+
+        peg$c0 = function(ss) {
+            return ss.length === 1 ? ss[0] : { type: 'matches', selectors: ss };
+          },
+        peg$c1 = function() { return void 0; },
+        peg$c2 = " ",
+        peg$c3 = peg$literalExpectation(" ", false),
+        peg$c4 = /^[^ [\],():#!=><~+.]/,
+        peg$c5 = peg$classExpectation([" ", "[", "]", ",", "(", ")", ":", "#", "!", "=", ">", "<", "~", "+", "."], true, false),
+        peg$c6 = function(i) { return i.join(''); },
+        peg$c7 = ">",
+        peg$c8 = peg$literalExpectation(">", false),
+        peg$c9 = function() { return 'child'; },
+        peg$c10 = "~",
+        peg$c11 = peg$literalExpectation("~", false),
+        peg$c12 = function() { return 'sibling'; },
+        peg$c13 = "+",
+        peg$c14 = peg$literalExpectation("+", false),
+        peg$c15 = function() { return 'adjacent'; },
+        peg$c16 = function() { return 'descendant'; },
+        peg$c17 = ",",
+        peg$c18 = peg$literalExpectation(",", false),
+        peg$c19 = function(s, ss) {
+          return [s].concat(ss.map(function (s) { return s[3]; }));
+        },
+        peg$c20 = function(op, s) {
+            if (!op) return s;
+            return { type: op, left: { type: 'exactNode' }, right: s };
+          },
+        peg$c21 = function(a, ops) {
+            return ops.reduce(function (memo, rhs) {
+              return { type: rhs[0], left: memo, right: rhs[1] };
+            }, a);
+          },
+        peg$c22 = "!",
+        peg$c23 = peg$literalExpectation("!", false),
+        peg$c24 = function(subject, as) {
+            const b = as.length === 1 ? as[0] : { type: 'compound', selectors: as };
+            if(subject) b.subject = true;
+            return b;
+          },
+        peg$c25 = "*",
+        peg$c26 = peg$literalExpectation("*", false),
+        peg$c27 = function(a) { return { type: 'wildcard', value: a }; },
+        peg$c28 = "#",
+        peg$c29 = peg$literalExpectation("#", false),
+        peg$c30 = function(i) { return { type: 'identifier', value: i }; },
+        peg$c31 = "[",
+        peg$c32 = peg$literalExpectation("[", false),
+        peg$c33 = "]",
+        peg$c34 = peg$literalExpectation("]", false),
+        peg$c35 = function(v) { return v; },
+        peg$c36 = /^[><!]/,
+        peg$c37 = peg$classExpectation([">", "<", "!"], false, false),
+        peg$c38 = "=",
+        peg$c39 = peg$literalExpectation("=", false),
+        peg$c40 = function(a) { return (a || '') + '='; },
+        peg$c41 = /^[><]/,
+        peg$c42 = peg$classExpectation([">", "<"], false, false),
+        peg$c43 = ".",
+        peg$c44 = peg$literalExpectation(".", false),
+        peg$c45 = function(a, as) {
+            return [].concat.apply([a], as).join('');
+          },
+        peg$c46 = function(name, op, value) {
+              return { type: 'attribute', name: name, operator: op, value: value };
+            },
+        peg$c47 = function(name) { return { type: 'attribute', name: name }; },
+        peg$c48 = "\"",
+        peg$c49 = peg$literalExpectation("\"", false),
+        peg$c50 = /^[^\\"]/,
+        peg$c51 = peg$classExpectation(["\\", "\""], true, false),
+        peg$c52 = "\\",
+        peg$c53 = peg$literalExpectation("\\", false),
+        peg$c54 = peg$anyExpectation(),
+        peg$c55 = function(a, b) { return a + b; },
+        peg$c56 = function(d) {
+                return { type: 'literal', value: strUnescape(d.join('')) };
+              },
+        peg$c57 = "'",
+        peg$c58 = peg$literalExpectation("'", false),
+        peg$c59 = /^[^\\']/,
+        peg$c60 = peg$classExpectation(["\\", "'"], true, false),
+        peg$c61 = /^[0-9]/,
+        peg$c62 = peg$classExpectation([["0", "9"]], false, false),
+        peg$c63 = function(a, b) {
+                // Can use `a.flat().join('')` once supported
+                const leadingDecimals = a ? [].concat.apply([], a).join('') : '';
+                return { type: 'literal', value: parseFloat(leadingDecimals + b.join('')) };
+              },
+        peg$c64 = function(i) { return { type: 'literal', value: i }; },
+        peg$c65 = "type(",
+        peg$c66 = peg$literalExpectation("type(", false),
+        peg$c67 = /^[^ )]/,
+        peg$c68 = peg$classExpectation([" ", ")"], true, false),
+        peg$c69 = ")",
+        peg$c70 = peg$literalExpectation(")", false),
+        peg$c71 = function(t) { return { type: 'type', value: t.join('') }; },
+        peg$c72 = /^[imsu]/,
+        peg$c73 = peg$classExpectation(["i", "m", "s", "u"], false, false),
+        peg$c74 = "/",
+        peg$c75 = peg$literalExpectation("/", false),
+        peg$c76 = function(pattern, flgs) {
+              return {
+                type: 'regexp', value: new RegExp(pattern.join(''), flgs ? flgs.join('') : '')
+              };
+            },
+        peg$c77 = /^[^\]\\]/,
+        peg$c78 = peg$classExpectation(["]", "\\"], true, false),
+        peg$c79 = function(cs) { return '[' + cs.join('') + ']'; },
+        peg$c80 = function(a) { return '\\' + a; },
+        peg$c81 = /^[^\/\\[]/,
+        peg$c82 = peg$classExpectation(["/", "\\", "["], true, false),
+        peg$c83 = function(cs) { return cs.join(''); },
+        peg$c84 = function(i, is) {
+          return { type: 'field', name: is.reduce(function(memo, p){ return memo + p[0] + p[1]; }, i)};
+        },
+        peg$c85 = ":not(",
+        peg$c86 = peg$literalExpectation(":not(", false),
+        peg$c87 = function(ss) { return { type: 'not', selectors: ss }; },
+        peg$c88 = ":matches(",
+        peg$c89 = peg$literalExpectation(":matches(", false),
+        peg$c90 = function(ss) { return { type: 'matches', selectors: ss }; },
+        peg$c91 = ":is(",
+        peg$c92 = peg$literalExpectation(":is(", false),
+        peg$c93 = ":has(",
+        peg$c94 = peg$literalExpectation(":has(", false),
+        peg$c95 = function(ss) { return { type: 'has', selectors: ss }; },
+        peg$c96 = ":first-child",
+        peg$c97 = peg$literalExpectation(":first-child", false),
+        peg$c98 = function() { return nth(1); },
+        peg$c99 = ":last-child",
+        peg$c100 = peg$literalExpectation(":last-child", false),
+        peg$c101 = function() { return nthLast(1); },
+        peg$c102 = ":nth-child(",
+        peg$c103 = peg$literalExpectation(":nth-child(", false),
+        peg$c104 = function(n) { return nth(parseInt(n.join(''), 10)); },
+        peg$c105 = ":nth-last-child(",
+        peg$c106 = peg$literalExpectation(":nth-last-child(", false),
+        peg$c107 = function(n) { return nthLast(parseInt(n.join(''), 10)); },
+        peg$c108 = ":",
+        peg$c109 = peg$literalExpectation(":", false),
+        peg$c110 = function(c) {
+          return { type: 'class', name: c };
+        },
+
+        peg$currPos          = 0,
+        peg$savedPos         = 0,
+        peg$posDetailsCache  = [{ line: 1, column: 1 }],
+        peg$maxFailPos       = 0,
+        peg$maxFailExpected  = [],
+        peg$silentFails      = 0,
+
+        peg$resultsCache = {},
+
+        peg$result;
+
+    if ("startRule" in options) {
+      if (!(options.startRule in peg$startRuleFunctions)) {
+        throw new Error("Can't start parsing from rule \"" + options.startRule + "\".");
+      }
+
+      peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
+    }
+
+    function text() {
+      return input.substring(peg$savedPos, peg$currPos);
+    }
+
+    function location() {
+      return peg$computeLocation(peg$savedPos, peg$currPos);
+    }
+
+    function expected(description, location) {
+      location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos)
+
+      throw peg$buildStructuredError(
+        [peg$otherExpectation(description)],
+        input.substring(peg$savedPos, peg$currPos),
+        location
+      );
+    }
+
+    function error(message, location) {
+      location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos)
+
+      throw peg$buildSimpleError(message, location);
+    }
+
+    function peg$literalExpectation(text, ignoreCase) {
+      return { type: "literal", text: text, ignoreCase: ignoreCase };
+    }
+
+    function peg$classExpectation(parts, inverted, ignoreCase) {
+      return { type: "class", parts: parts, inverted: inverted, ignoreCase: ignoreCase };
+    }
+
+    function peg$anyExpectation() {
+      return { type: "any" };
+    }
+
+    function peg$endExpectation() {
+      return { type: "end" };
+    }
+
+    function peg$otherExpectation(description) {
+      return { type: "other", description: description };
+    }
+
+    function peg$computePosDetails(pos) {
+      var details = peg$posDetailsCache[pos], p;
+
+      if (details) {
+        return details;
+      } else {
+        p = pos - 1;
+        while (!peg$posDetailsCache[p]) {
+          p--;
+        }
+
+        details = peg$posDetailsCache[p];
+        details = {
+          line:   details.line,
+          column: details.column
+        };
+
+        while (p < pos) {
+          if (input.charCodeAt(p) === 10) {
+            details.line++;
+            details.column = 1;
+          } else {
+            details.column++;
+          }
+
+          p++;
+        }
+
+        peg$posDetailsCache[pos] = details;
+        return details;
+      }
+    }
+
+    function peg$computeLocation(startPos, endPos) {
+      var startPosDetails = peg$computePosDetails(startPos),
+          endPosDetails   = peg$computePosDetails(endPos);
+
+      return {
+        start: {
+          offset: startPos,
+          line:   startPosDetails.line,
+          column: startPosDetails.column
+        },
+        end: {
+          offset: endPos,
+          line:   endPosDetails.line,
+          column: endPosDetails.column
+        }
+      };
+    }
+
+    function peg$fail(expected) {
+      if (peg$currPos < peg$maxFailPos) { return; }
+
+      if (peg$currPos > peg$maxFailPos) {
+        peg$maxFailPos = peg$currPos;
+        peg$maxFailExpected = [];
+      }
+
+      peg$maxFailExpected.push(expected);
+    }
+
+    function peg$buildSimpleError(message, location) {
+      return new peg$SyntaxError(message, null, null, location);
+    }
+
+    function peg$buildStructuredError(expected, found, location) {
+      return new peg$SyntaxError(
+        peg$SyntaxError.buildMessage(expected, found),
+        expected,
+        found,
+        location
+      );
+    }
+
+    function peg$parsestart() {
+      var s0, s1, s2, s3;
+
+      var key    = peg$currPos * 36 + 0,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parse_();
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parseselectors();
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parse_();
+          if (s3 !== peg$FAILED) {
+            peg$savedPos = s0;
+            s1 = peg$c0(s2);
+            s0 = s1;
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+      if (s0 === peg$FAILED) {
+        s0 = peg$currPos;
+        s1 = peg$parse_();
+        if (s1 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c1();
+        }
+        s0 = s1;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parse_() {
+      var s0, s1;
+
+      var key    = peg$currPos * 36 + 1,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = [];
+      if (input.charCodeAt(peg$currPos) === 32) {
+        s1 = peg$c2;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c3); }
+      }
+      while (s1 !== peg$FAILED) {
+        s0.push(s1);
+        if (input.charCodeAt(peg$currPos) === 32) {
+          s1 = peg$c2;
+          peg$currPos++;
+        } else {
+          s1 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c3); }
+        }
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseidentifierName() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 2,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = [];
+      if (peg$c4.test(input.charAt(peg$currPos))) {
+        s2 = input.charAt(peg$currPos);
+        peg$currPos++;
+      } else {
+        s2 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c5); }
+      }
+      if (s2 !== peg$FAILED) {
+        while (s2 !== peg$FAILED) {
+          s1.push(s2);
+          if (peg$c4.test(input.charAt(peg$currPos))) {
+            s2 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s2 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c5); }
+          }
+        }
+      } else {
+        s1 = peg$FAILED;
+      }
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c6(s1);
+      }
+      s0 = s1;
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsebinaryOp() {
+      var s0, s1, s2, s3;
+
+      var key    = peg$currPos * 36 + 3,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parse_();
+      if (s1 !== peg$FAILED) {
+        if (input.charCodeAt(peg$currPos) === 62) {
+          s2 = peg$c7;
+          peg$currPos++;
+        } else {
+          s2 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c8); }
+        }
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parse_();
+          if (s3 !== peg$FAILED) {
+            peg$savedPos = s0;
+            s1 = peg$c9();
+            s0 = s1;
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+      if (s0 === peg$FAILED) {
+        s0 = peg$currPos;
+        s1 = peg$parse_();
+        if (s1 !== peg$FAILED) {
+          if (input.charCodeAt(peg$currPos) === 126) {
+            s2 = peg$c10;
+            peg$currPos++;
+          } else {
+            s2 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c11); }
+          }
+          if (s2 !== peg$FAILED) {
+            s3 = peg$parse_();
+            if (s3 !== peg$FAILED) {
+              peg$savedPos = s0;
+              s1 = peg$c12();
+              s0 = s1;
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+        if (s0 === peg$FAILED) {
+          s0 = peg$currPos;
+          s1 = peg$parse_();
+          if (s1 !== peg$FAILED) {
+            if (input.charCodeAt(peg$currPos) === 43) {
+              s2 = peg$c13;
+              peg$currPos++;
+            } else {
+              s2 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c14); }
+            }
+            if (s2 !== peg$FAILED) {
+              s3 = peg$parse_();
+              if (s3 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c15();
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+          if (s0 === peg$FAILED) {
+            s0 = peg$currPos;
+            if (input.charCodeAt(peg$currPos) === 32) {
+              s1 = peg$c2;
+              peg$currPos++;
+            } else {
+              s1 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c3); }
+            }
+            if (s1 !== peg$FAILED) {
+              s2 = peg$parse_();
+              if (s2 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c16();
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          }
+        }
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsehasSelectors() {
+      var s0, s1, s2, s3, s4, s5, s6, s7;
+
+      var key    = peg$currPos * 36 + 4,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parsehasSelector();
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        s3 = peg$currPos;
+        s4 = peg$parse_();
+        if (s4 !== peg$FAILED) {
+          if (input.charCodeAt(peg$currPos) === 44) {
+            s5 = peg$c17;
+            peg$currPos++;
+          } else {
+            s5 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c18); }
+          }
+          if (s5 !== peg$FAILED) {
+            s6 = peg$parse_();
+            if (s6 !== peg$FAILED) {
+              s7 = peg$parsehasSelector();
+              if (s7 !== peg$FAILED) {
+                s4 = [s4, s5, s6, s7];
+                s3 = s4;
+              } else {
+                peg$currPos = s3;
+                s3 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s3;
+          s3 = peg$FAILED;
+        }
+        while (s3 !== peg$FAILED) {
+          s2.push(s3);
+          s3 = peg$currPos;
+          s4 = peg$parse_();
+          if (s4 !== peg$FAILED) {
+            if (input.charCodeAt(peg$currPos) === 44) {
+              s5 = peg$c17;
+              peg$currPos++;
+            } else {
+              s5 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c18); }
+            }
+            if (s5 !== peg$FAILED) {
+              s6 = peg$parse_();
+              if (s6 !== peg$FAILED) {
+                s7 = peg$parsehasSelector();
+                if (s7 !== peg$FAILED) {
+                  s4 = [s4, s5, s6, s7];
+                  s3 = s4;
+                } else {
+                  peg$currPos = s3;
+                  s3 = peg$FAILED;
+                }
+              } else {
+                peg$currPos = s3;
+                s3 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c19(s1, s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseselectors() {
+      var s0, s1, s2, s3, s4, s5, s6, s7;
+
+      var key    = peg$currPos * 36 + 5,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parseselector();
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        s3 = peg$currPos;
+        s4 = peg$parse_();
+        if (s4 !== peg$FAILED) {
+          if (input.charCodeAt(peg$currPos) === 44) {
+            s5 = peg$c17;
+            peg$currPos++;
+          } else {
+            s5 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c18); }
+          }
+          if (s5 !== peg$FAILED) {
+            s6 = peg$parse_();
+            if (s6 !== peg$FAILED) {
+              s7 = peg$parseselector();
+              if (s7 !== peg$FAILED) {
+                s4 = [s4, s5, s6, s7];
+                s3 = s4;
+              } else {
+                peg$currPos = s3;
+                s3 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s3;
+          s3 = peg$FAILED;
+        }
+        while (s3 !== peg$FAILED) {
+          s2.push(s3);
+          s3 = peg$currPos;
+          s4 = peg$parse_();
+          if (s4 !== peg$FAILED) {
+            if (input.charCodeAt(peg$currPos) === 44) {
+              s5 = peg$c17;
+              peg$currPos++;
+            } else {
+              s5 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c18); }
+            }
+            if (s5 !== peg$FAILED) {
+              s6 = peg$parse_();
+              if (s6 !== peg$FAILED) {
+                s7 = peg$parseselector();
+                if (s7 !== peg$FAILED) {
+                  s4 = [s4, s5, s6, s7];
+                  s3 = s4;
+                } else {
+                  peg$currPos = s3;
+                  s3 = peg$FAILED;
+                }
+              } else {
+                peg$currPos = s3;
+                s3 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c19(s1, s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsehasSelector() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 6,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parsebinaryOp();
+      if (s1 === peg$FAILED) {
+        s1 = null;
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parseselector();
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c20(s1, s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseselector() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 7,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parsesequence();
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        s3 = peg$currPos;
+        s4 = peg$parsebinaryOp();
+        if (s4 !== peg$FAILED) {
+          s5 = peg$parsesequence();
+          if (s5 !== peg$FAILED) {
+            s4 = [s4, s5];
+            s3 = s4;
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s3;
+          s3 = peg$FAILED;
+        }
+        while (s3 !== peg$FAILED) {
+          s2.push(s3);
+          s3 = peg$currPos;
+          s4 = peg$parsebinaryOp();
+          if (s4 !== peg$FAILED) {
+            s5 = peg$parsesequence();
+            if (s5 !== peg$FAILED) {
+              s4 = [s4, s5];
+              s3 = s4;
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c21(s1, s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsesequence() {
+      var s0, s1, s2, s3;
+
+      var key    = peg$currPos * 36 + 8,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 33) {
+        s1 = peg$c22;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c23); }
+      }
+      if (s1 === peg$FAILED) {
+        s1 = null;
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        s3 = peg$parseatom();
+        if (s3 !== peg$FAILED) {
+          while (s3 !== peg$FAILED) {
+            s2.push(s3);
+            s3 = peg$parseatom();
+          }
+        } else {
+          s2 = peg$FAILED;
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c24(s1, s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseatom() {
+      var s0;
+
+      var key    = peg$currPos * 36 + 9,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$parsewildcard();
+      if (s0 === peg$FAILED) {
+        s0 = peg$parseidentifier();
+        if (s0 === peg$FAILED) {
+          s0 = peg$parseattr();
+          if (s0 === peg$FAILED) {
+            s0 = peg$parsefield();
+            if (s0 === peg$FAILED) {
+              s0 = peg$parsenegation();
+              if (s0 === peg$FAILED) {
+                s0 = peg$parsematches();
+                if (s0 === peg$FAILED) {
+                  s0 = peg$parseis();
+                  if (s0 === peg$FAILED) {
+                    s0 = peg$parsehas();
+                    if (s0 === peg$FAILED) {
+                      s0 = peg$parsefirstChild();
+                      if (s0 === peg$FAILED) {
+                        s0 = peg$parselastChild();
+                        if (s0 === peg$FAILED) {
+                          s0 = peg$parsenthChild();
+                          if (s0 === peg$FAILED) {
+                            s0 = peg$parsenthLastChild();
+                            if (s0 === peg$FAILED) {
+                              s0 = peg$parseclass();
+                            }
+                          }
+                        }
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsewildcard() {
+      var s0, s1;
+
+      var key    = peg$currPos * 36 + 10,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 42) {
+        s1 = peg$c25;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c26); }
+      }
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c27(s1);
+      }
+      s0 = s1;
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseidentifier() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 11,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 35) {
+        s1 = peg$c28;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c29); }
+      }
+      if (s1 === peg$FAILED) {
+        s1 = null;
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parseidentifierName();
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c30(s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseattr() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 12,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 91) {
+        s1 = peg$c31;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c32); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parseattrValue();
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 93) {
+                s5 = peg$c33;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c34); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c35(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseattrOps() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 13,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (peg$c36.test(input.charAt(peg$currPos))) {
+        s1 = input.charAt(peg$currPos);
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c37); }
+      }
+      if (s1 === peg$FAILED) {
+        s1 = null;
+      }
+      if (s1 !== peg$FAILED) {
+        if (input.charCodeAt(peg$currPos) === 61) {
+          s2 = peg$c38;
+          peg$currPos++;
+        } else {
+          s2 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c39); }
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c40(s1);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+      if (s0 === peg$FAILED) {
+        if (peg$c41.test(input.charAt(peg$currPos))) {
+          s0 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s0 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c42); }
+        }
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseattrEqOps() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 14,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 33) {
+        s1 = peg$c22;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c23); }
+      }
+      if (s1 === peg$FAILED) {
+        s1 = null;
+      }
+      if (s1 !== peg$FAILED) {
+        if (input.charCodeAt(peg$currPos) === 61) {
+          s2 = peg$c38;
+          peg$currPos++;
+        } else {
+          s2 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c39); }
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c40(s1);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseattrName() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 15,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parseidentifierName();
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        s3 = peg$currPos;
+        if (input.charCodeAt(peg$currPos) === 46) {
+          s4 = peg$c43;
+          peg$currPos++;
+        } else {
+          s4 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c44); }
+        }
+        if (s4 !== peg$FAILED) {
+          s5 = peg$parseidentifierName();
+          if (s5 !== peg$FAILED) {
+            s4 = [s4, s5];
+            s3 = s4;
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s3;
+          s3 = peg$FAILED;
+        }
+        while (s3 !== peg$FAILED) {
+          s2.push(s3);
+          s3 = peg$currPos;
+          if (input.charCodeAt(peg$currPos) === 46) {
+            s4 = peg$c43;
+            peg$currPos++;
+          } else {
+            s4 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c44); }
+          }
+          if (s4 !== peg$FAILED) {
+            s5 = peg$parseidentifierName();
+            if (s5 !== peg$FAILED) {
+              s4 = [s4, s5];
+              s3 = s4;
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c45(s1, s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseattrValue() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 16,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parseattrName();
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parseattrEqOps();
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              s5 = peg$parsetype();
+              if (s5 === peg$FAILED) {
+                s5 = peg$parseregex();
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c46(s1, s3, s5);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+      if (s0 === peg$FAILED) {
+        s0 = peg$currPos;
+        s1 = peg$parseattrName();
+        if (s1 !== peg$FAILED) {
+          s2 = peg$parse_();
+          if (s2 !== peg$FAILED) {
+            s3 = peg$parseattrOps();
+            if (s3 !== peg$FAILED) {
+              s4 = peg$parse_();
+              if (s4 !== peg$FAILED) {
+                s5 = peg$parsestring();
+                if (s5 === peg$FAILED) {
+                  s5 = peg$parsenumber();
+                  if (s5 === peg$FAILED) {
+                    s5 = peg$parsepath();
+                  }
+                }
+                if (s5 !== peg$FAILED) {
+                  peg$savedPos = s0;
+                  s1 = peg$c46(s1, s3, s5);
+                  s0 = s1;
+                } else {
+                  peg$currPos = s0;
+                  s0 = peg$FAILED;
+                }
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+        if (s0 === peg$FAILED) {
+          s0 = peg$currPos;
+          s1 = peg$parseattrName();
+          if (s1 !== peg$FAILED) {
+            peg$savedPos = s0;
+            s1 = peg$c47(s1);
+          }
+          s0 = s1;
+        }
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsestring() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 17,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 34) {
+        s1 = peg$c48;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c49); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        if (peg$c50.test(input.charAt(peg$currPos))) {
+          s3 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s3 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c51); }
+        }
+        if (s3 === peg$FAILED) {
+          s3 = peg$currPos;
+          if (input.charCodeAt(peg$currPos) === 92) {
+            s4 = peg$c52;
+            peg$currPos++;
+          } else {
+            s4 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c53); }
+          }
+          if (s4 !== peg$FAILED) {
+            if (input.length > peg$currPos) {
+              s5 = input.charAt(peg$currPos);
+              peg$currPos++;
+            } else {
+              s5 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c54); }
+            }
+            if (s5 !== peg$FAILED) {
+              peg$savedPos = s3;
+              s4 = peg$c55(s4, s5);
+              s3 = s4;
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s3;
+            s3 = peg$FAILED;
+          }
+        }
+        while (s3 !== peg$FAILED) {
+          s2.push(s3);
+          if (peg$c50.test(input.charAt(peg$currPos))) {
+            s3 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s3 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c51); }
+          }
+          if (s3 === peg$FAILED) {
+            s3 = peg$currPos;
+            if (input.charCodeAt(peg$currPos) === 92) {
+              s4 = peg$c52;
+              peg$currPos++;
+            } else {
+              s4 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c53); }
+            }
+            if (s4 !== peg$FAILED) {
+              if (input.length > peg$currPos) {
+                s5 = input.charAt(peg$currPos);
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c54); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s3;
+                s4 = peg$c55(s4, s5);
+                s3 = s4;
+              } else {
+                peg$currPos = s3;
+                s3 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          }
+        }
+        if (s2 !== peg$FAILED) {
+          if (input.charCodeAt(peg$currPos) === 34) {
+            s3 = peg$c48;
+            peg$currPos++;
+          } else {
+            s3 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c49); }
+          }
+          if (s3 !== peg$FAILED) {
+            peg$savedPos = s0;
+            s1 = peg$c56(s2);
+            s0 = s1;
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+      if (s0 === peg$FAILED) {
+        s0 = peg$currPos;
+        if (input.charCodeAt(peg$currPos) === 39) {
+          s1 = peg$c57;
+          peg$currPos++;
+        } else {
+          s1 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c58); }
+        }
+        if (s1 !== peg$FAILED) {
+          s2 = [];
+          if (peg$c59.test(input.charAt(peg$currPos))) {
+            s3 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s3 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c60); }
+          }
+          if (s3 === peg$FAILED) {
+            s3 = peg$currPos;
+            if (input.charCodeAt(peg$currPos) === 92) {
+              s4 = peg$c52;
+              peg$currPos++;
+            } else {
+              s4 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c53); }
+            }
+            if (s4 !== peg$FAILED) {
+              if (input.length > peg$currPos) {
+                s5 = input.charAt(peg$currPos);
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c54); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s3;
+                s4 = peg$c55(s4, s5);
+                s3 = s4;
+              } else {
+                peg$currPos = s3;
+                s3 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s3;
+              s3 = peg$FAILED;
+            }
+          }
+          while (s3 !== peg$FAILED) {
+            s2.push(s3);
+            if (peg$c59.test(input.charAt(peg$currPos))) {
+              s3 = input.charAt(peg$currPos);
+              peg$currPos++;
+            } else {
+              s3 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c60); }
+            }
+            if (s3 === peg$FAILED) {
+              s3 = peg$currPos;
+              if (input.charCodeAt(peg$currPos) === 92) {
+                s4 = peg$c52;
+                peg$currPos++;
+              } else {
+                s4 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c53); }
+              }
+              if (s4 !== peg$FAILED) {
+                if (input.length > peg$currPos) {
+                  s5 = input.charAt(peg$currPos);
+                  peg$currPos++;
+                } else {
+                  s5 = peg$FAILED;
+                  if (peg$silentFails === 0) { peg$fail(peg$c54); }
+                }
+                if (s5 !== peg$FAILED) {
+                  peg$savedPos = s3;
+                  s4 = peg$c55(s4, s5);
+                  s3 = s4;
+                } else {
+                  peg$currPos = s3;
+                  s3 = peg$FAILED;
+                }
+              } else {
+                peg$currPos = s3;
+                s3 = peg$FAILED;
+              }
+            }
+          }
+          if (s2 !== peg$FAILED) {
+            if (input.charCodeAt(peg$currPos) === 39) {
+              s3 = peg$c57;
+              peg$currPos++;
+            } else {
+              s3 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c58); }
+            }
+            if (s3 !== peg$FAILED) {
+              peg$savedPos = s0;
+              s1 = peg$c56(s2);
+              s0 = s1;
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsenumber() {
+      var s0, s1, s2, s3;
+
+      var key    = peg$currPos * 36 + 18,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$currPos;
+      s2 = [];
+      if (peg$c61.test(input.charAt(peg$currPos))) {
+        s3 = input.charAt(peg$currPos);
+        peg$currPos++;
+      } else {
+        s3 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c62); }
+      }
+      while (s3 !== peg$FAILED) {
+        s2.push(s3);
+        if (peg$c61.test(input.charAt(peg$currPos))) {
+          s3 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s3 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c62); }
+        }
+      }
+      if (s2 !== peg$FAILED) {
+        if (input.charCodeAt(peg$currPos) === 46) {
+          s3 = peg$c43;
+          peg$currPos++;
+        } else {
+          s3 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c44); }
+        }
+        if (s3 !== peg$FAILED) {
+          s2 = [s2, s3];
+          s1 = s2;
+        } else {
+          peg$currPos = s1;
+          s1 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s1;
+        s1 = peg$FAILED;
+      }
+      if (s1 === peg$FAILED) {
+        s1 = null;
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        if (peg$c61.test(input.charAt(peg$currPos))) {
+          s3 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s3 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c62); }
+        }
+        if (s3 !== peg$FAILED) {
+          while (s3 !== peg$FAILED) {
+            s2.push(s3);
+            if (peg$c61.test(input.charAt(peg$currPos))) {
+              s3 = input.charAt(peg$currPos);
+              peg$currPos++;
+            } else {
+              s3 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c62); }
+            }
+          }
+        } else {
+          s2 = peg$FAILED;
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c63(s1, s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsepath() {
+      var s0, s1;
+
+      var key    = peg$currPos * 36 + 19,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = peg$parseidentifierName();
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c64(s1);
+      }
+      s0 = s1;
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsetype() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 20,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 5) === peg$c65) {
+        s1 = peg$c65;
+        peg$currPos += 5;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c66); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = [];
+          if (peg$c67.test(input.charAt(peg$currPos))) {
+            s4 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s4 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c68); }
+          }
+          if (s4 !== peg$FAILED) {
+            while (s4 !== peg$FAILED) {
+              s3.push(s4);
+              if (peg$c67.test(input.charAt(peg$currPos))) {
+                s4 = input.charAt(peg$currPos);
+                peg$currPos++;
+              } else {
+                s4 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c68); }
+              }
+            }
+          } else {
+            s3 = peg$FAILED;
+          }
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 41) {
+                s5 = peg$c69;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c70); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c71(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseflags() {
+      var s0, s1;
+
+      var key    = peg$currPos * 36 + 21,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = [];
+      if (peg$c72.test(input.charAt(peg$currPos))) {
+        s1 = input.charAt(peg$currPos);
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c73); }
+      }
+      if (s1 !== peg$FAILED) {
+        while (s1 !== peg$FAILED) {
+          s0.push(s1);
+          if (peg$c72.test(input.charAt(peg$currPos))) {
+            s1 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s1 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c73); }
+          }
+        }
+      } else {
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseregex() {
+      var s0, s1, s2, s3, s4;
+
+      var key    = peg$currPos * 36 + 22,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 47) {
+        s1 = peg$c74;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c75); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        s3 = peg$parsere_character_class();
+        if (s3 === peg$FAILED) {
+          s3 = peg$parsere_escape();
+          if (s3 === peg$FAILED) {
+            s3 = peg$parsere_chars();
+          }
+        }
+        if (s3 !== peg$FAILED) {
+          while (s3 !== peg$FAILED) {
+            s2.push(s3);
+            s3 = peg$parsere_character_class();
+            if (s3 === peg$FAILED) {
+              s3 = peg$parsere_escape();
+              if (s3 === peg$FAILED) {
+                s3 = peg$parsere_chars();
+              }
+            }
+          }
+        } else {
+          s2 = peg$FAILED;
+        }
+        if (s2 !== peg$FAILED) {
+          if (input.charCodeAt(peg$currPos) === 47) {
+            s3 = peg$c74;
+            peg$currPos++;
+          } else {
+            s3 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c75); }
+          }
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parseflags();
+            if (s4 === peg$FAILED) {
+              s4 = null;
+            }
+            if (s4 !== peg$FAILED) {
+              peg$savedPos = s0;
+              s1 = peg$c76(s2, s4);
+              s0 = s1;
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsere_character_class() {
+      var s0, s1, s2, s3;
+
+      var key    = peg$currPos * 36 + 23,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 91) {
+        s1 = peg$c31;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c32); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = [];
+        if (peg$c77.test(input.charAt(peg$currPos))) {
+          s3 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s3 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c78); }
+        }
+        if (s3 === peg$FAILED) {
+          s3 = peg$parsere_escape();
+        }
+        if (s3 !== peg$FAILED) {
+          while (s3 !== peg$FAILED) {
+            s2.push(s3);
+            if (peg$c77.test(input.charAt(peg$currPos))) {
+              s3 = input.charAt(peg$currPos);
+              peg$currPos++;
+            } else {
+              s3 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c78); }
+            }
+            if (s3 === peg$FAILED) {
+              s3 = peg$parsere_escape();
+            }
+          }
+        } else {
+          s2 = peg$FAILED;
+        }
+        if (s2 !== peg$FAILED) {
+          if (input.charCodeAt(peg$currPos) === 93) {
+            s3 = peg$c33;
+            peg$currPos++;
+          } else {
+            s3 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c34); }
+          }
+          if (s3 !== peg$FAILED) {
+            peg$savedPos = s0;
+            s1 = peg$c79(s2);
+            s0 = s1;
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsere_escape() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 24,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 92) {
+        s1 = peg$c52;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c53); }
+      }
+      if (s1 !== peg$FAILED) {
+        if (input.length > peg$currPos) {
+          s2 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s2 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c54); }
+        }
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c80(s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsere_chars() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 25,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      s1 = [];
+      if (peg$c81.test(input.charAt(peg$currPos))) {
+        s2 = input.charAt(peg$currPos);
+        peg$currPos++;
+      } else {
+        s2 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c82); }
+      }
+      if (s2 !== peg$FAILED) {
+        while (s2 !== peg$FAILED) {
+          s1.push(s2);
+          if (peg$c81.test(input.charAt(peg$currPos))) {
+            s2 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s2 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c82); }
+          }
+        }
+      } else {
+        s1 = peg$FAILED;
+      }
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c83(s1);
+      }
+      s0 = s1;
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsefield() {
+      var s0, s1, s2, s3, s4, s5, s6;
+
+      var key    = peg$currPos * 36 + 26,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 46) {
+        s1 = peg$c43;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c44); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parseidentifierName();
+        if (s2 !== peg$FAILED) {
+          s3 = [];
+          s4 = peg$currPos;
+          if (input.charCodeAt(peg$currPos) === 46) {
+            s5 = peg$c43;
+            peg$currPos++;
+          } else {
+            s5 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c44); }
+          }
+          if (s5 !== peg$FAILED) {
+            s6 = peg$parseidentifierName();
+            if (s6 !== peg$FAILED) {
+              s5 = [s5, s6];
+              s4 = s5;
+            } else {
+              peg$currPos = s4;
+              s4 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s4;
+            s4 = peg$FAILED;
+          }
+          while (s4 !== peg$FAILED) {
+            s3.push(s4);
+            s4 = peg$currPos;
+            if (input.charCodeAt(peg$currPos) === 46) {
+              s5 = peg$c43;
+              peg$currPos++;
+            } else {
+              s5 = peg$FAILED;
+              if (peg$silentFails === 0) { peg$fail(peg$c44); }
+            }
+            if (s5 !== peg$FAILED) {
+              s6 = peg$parseidentifierName();
+              if (s6 !== peg$FAILED) {
+                s5 = [s5, s6];
+                s4 = s5;
+              } else {
+                peg$currPos = s4;
+                s4 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s4;
+              s4 = peg$FAILED;
+            }
+          }
+          if (s3 !== peg$FAILED) {
+            peg$savedPos = s0;
+            s1 = peg$c84(s2, s3);
+            s0 = s1;
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsenegation() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 27,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 5) === peg$c85) {
+        s1 = peg$c85;
+        peg$currPos += 5;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c86); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parseselectors();
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 41) {
+                s5 = peg$c69;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c70); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c87(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsematches() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 28,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 9) === peg$c88) {
+        s1 = peg$c88;
+        peg$currPos += 9;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c89); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parseselectors();
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 41) {
+                s5 = peg$c69;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c70); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c90(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseis() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 29,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 4) === peg$c91) {
+        s1 = peg$c91;
+        peg$currPos += 4;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c92); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parseselectors();
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 41) {
+                s5 = peg$c69;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c70); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c90(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsehas() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 30,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 5) === peg$c93) {
+        s1 = peg$c93;
+        peg$currPos += 5;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c94); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = peg$parsehasSelectors();
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 41) {
+                s5 = peg$c69;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c70); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c95(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsefirstChild() {
+      var s0, s1;
+
+      var key    = peg$currPos * 36 + 31,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 12) === peg$c96) {
+        s1 = peg$c96;
+        peg$currPos += 12;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c97); }
+      }
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c98();
+      }
+      s0 = s1;
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parselastChild() {
+      var s0, s1;
+
+      var key    = peg$currPos * 36 + 32,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 11) === peg$c99) {
+        s1 = peg$c99;
+        peg$currPos += 11;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c100); }
+      }
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c101();
+      }
+      s0 = s1;
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsenthChild() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 33,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 11) === peg$c102) {
+        s1 = peg$c102;
+        peg$currPos += 11;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c103); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = [];
+          if (peg$c61.test(input.charAt(peg$currPos))) {
+            s4 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s4 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c62); }
+          }
+          if (s4 !== peg$FAILED) {
+            while (s4 !== peg$FAILED) {
+              s3.push(s4);
+              if (peg$c61.test(input.charAt(peg$currPos))) {
+                s4 = input.charAt(peg$currPos);
+                peg$currPos++;
+              } else {
+                s4 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c62); }
+              }
+            }
+          } else {
+            s3 = peg$FAILED;
+          }
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 41) {
+                s5 = peg$c69;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c70); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c104(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parsenthLastChild() {
+      var s0, s1, s2, s3, s4, s5;
+
+      var key    = peg$currPos * 36 + 34,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.substr(peg$currPos, 16) === peg$c105) {
+        s1 = peg$c105;
+        peg$currPos += 16;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c106); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parse_();
+        if (s2 !== peg$FAILED) {
+          s3 = [];
+          if (peg$c61.test(input.charAt(peg$currPos))) {
+            s4 = input.charAt(peg$currPos);
+            peg$currPos++;
+          } else {
+            s4 = peg$FAILED;
+            if (peg$silentFails === 0) { peg$fail(peg$c62); }
+          }
+          if (s4 !== peg$FAILED) {
+            while (s4 !== peg$FAILED) {
+              s3.push(s4);
+              if (peg$c61.test(input.charAt(peg$currPos))) {
+                s4 = input.charAt(peg$currPos);
+                peg$currPos++;
+              } else {
+                s4 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c62); }
+              }
+            }
+          } else {
+            s3 = peg$FAILED;
+          }
+          if (s3 !== peg$FAILED) {
+            s4 = peg$parse_();
+            if (s4 !== peg$FAILED) {
+              if (input.charCodeAt(peg$currPos) === 41) {
+                s5 = peg$c69;
+                peg$currPos++;
+              } else {
+                s5 = peg$FAILED;
+                if (peg$silentFails === 0) { peg$fail(peg$c70); }
+              }
+              if (s5 !== peg$FAILED) {
+                peg$savedPos = s0;
+                s1 = peg$c107(s3);
+                s0 = s1;
+              } else {
+                peg$currPos = s0;
+                s0 = peg$FAILED;
+              }
+            } else {
+              peg$currPos = s0;
+              s0 = peg$FAILED;
+            }
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+    function peg$parseclass() {
+      var s0, s1, s2;
+
+      var key    = peg$currPos * 36 + 35,
+          cached = peg$resultsCache[key];
+
+      if (cached) {
+        peg$currPos = cached.nextPos;
+
+        return cached.result;
+      }
+
+      s0 = peg$currPos;
+      if (input.charCodeAt(peg$currPos) === 58) {
+        s1 = peg$c108;
+        peg$currPos++;
+      } else {
+        s1 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c109); }
+      }
+      if (s1 !== peg$FAILED) {
+        s2 = peg$parseidentifierName();
+        if (s2 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c110(s2);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+
+      peg$resultsCache[key] = { nextPos: peg$currPos, result: s0 };
+
+      return s0;
+    }
+
+
+      function nth(n) { return { type: 'nth-child', index: { type: 'literal', value: n } }; }
+      function nthLast(n) { return { type: 'nth-last-child', index: { type: 'literal', value: n } }; }
+      function strUnescape(s) {
+        return s.replace(/\\(.)/g, function(match, ch) {
+          switch(ch) {
+            case 'b': return '\b';
+            case 'f': return '\f';
+            case 'n': return '\n';
+            case 'r': return '\r';
+            case 't': return '\t';
+            case 'v': return '\v';
+            default: return ch;
+          }
+        });
+      }
+
+
+    peg$result = peg$startRuleFunction();
+
+    if (peg$result !== peg$FAILED && peg$currPos === input.length) {
+      return peg$result;
+    } else {
+      if (peg$result !== peg$FAILED && peg$currPos < input.length) {
+        peg$fail(peg$endExpectation());
+      }
+
+      throw peg$buildStructuredError(
+        peg$maxFailExpected,
+        peg$maxFailPos < input.length ? input.charAt(peg$maxFailPos) : null,
+        peg$maxFailPos < input.length
+          ? peg$computeLocation(peg$maxFailPos, peg$maxFailPos + 1)
+          : peg$computeLocation(peg$maxFailPos, peg$maxFailPos)
+      );
+    }
+  }
+
+  return {
+    SyntaxError: peg$SyntaxError,
+    parse:       peg$parse
+  };
+});