add postCSS@5.2 support

Author: Nikita Mostovoy

lib/less-parser.js

@@ -137,29 +137,35 @@ export default class LessParser extends Parser {
     }
 
     /* eslint-disable max-statements, complexity */
-    word () {
+    other () {
         let end = false;
         let colon = false;
         let bracket = null;
-        let brackets = 0;
+        const brackets = [];
         const start = this.pos;
+        
+        // we need pass "()" as spaces
+        // However we can override method Parser.loop, but it seems less maintainable
+        if (this.tokens[start][0] === 'brackets') {
+            this.spaces += this.tokens[start][1];
+            return;
+        }
         const isMixin = isMixinToken(this.tokens[start]);
         const isExtendRule = Boolean(findExtendRule(this.tokens, start));
         const params = [];
 
         this.pos += 1;
-
         while (this.pos < this.tokens.length) {
             const token = this.tokens[this.pos];
             const type = token[0];
 
-            if (type === '(') {
+            if (type === '(' || type === '[') {
                 if (!bracket) {
                     bracket = token;
                 }
 
-                brackets += 1;
-            } else if (brackets === 0) {
+                brackets.push(type === '(' ? ')' : ']');
+            } else if (brackets.length === 0) {
                 if (type === ';') {
                     const foundEndOfRule = this.processEndOfRule({
                         start,
@@ -184,14 +190,14 @@ export default class LessParser extends Parser {
                 } else if (type === ':') {
                     colon = true;
                 }
-            } else if (type === ')') {
-                brackets -= 1;
-                if (brackets === 0) {
+            } else if (type === brackets[brackets.length - 1]) {
+                brackets.pop();
+                if (brackets.length === 0) {
                     bracket = null;
                 }
             }
 
-            if (brackets || type === 'brackets' || params[0]) {
+            if (brackets.length > 0 || type === 'brackets' || params[0]) {
                 params.push(token);
             }
 
@@ -203,7 +209,7 @@ export default class LessParser extends Parser {
             end = true;
         }
 
-        if (brackets > 0) {
+        if (brackets.length > 0) {
             this.unclosedBracket(bracket);
         }
 

npm-shrinkwrap.json

@@ -35,7 +35,7 @@
     "prepublish": "./node_modules/.bin/gulp dist"
   },
   "dependencies": {
-    "postcss": "^5.0.21"
+    "postcss": "^5.2.16"
   },
   "devDependencies": {
     "babel-core": "^6.7.2",