From f197b2a0f8a95e4df93c1c15a2438a8380d01cb8 Mon Sep 17 00:00:00 2001
From: Jacob Thornton <jacobthornton@gmail.com>
Date: Thu, 10 Nov 2011 21:24:25 -0800
Subject: [PATCH] store index on selector element objects for line number
 inference

---
 lib/less/parser.js       | 6 +++---
 lib/less/tree/element.js | 3 ++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/less/parser.js b/lib/less/parser.js
index 1e04645d..9657eb4e 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -680,7 +680,7 @@ less.Parser = function Parser(env) {
                     if (s !== '.' && s !== '#') { return }
 
                     while (e = $(/^[#.](?:[\w-]|\\(?:[a-fA-F0-9]{1,6} ?|[^a-fA-F0-9]))+/)) {
-                        elements.push(new(tree.Element)(c, e));
+                        elements.push(new(tree.Element)(c, e, i));
                         c = $('>');
                     }
                     $('(') && (args = $(this.entities.arguments)) && $(')');
@@ -799,10 +799,10 @@ less.Parser = function Parser(env) {
                 c = $(this.combinator);
                 e = $(/^(?:[.#]?|:*)(?:[\w-]|\\(?:[a-fA-F0-9]{1,6} ?|[^a-fA-F0-9]))+/) || $('*') || $(this.attribute) || $(/^\([^)@]+\)/) || $(/^(?:\d*\.)?\d+%/);
 
-                if (e) { return new(tree.Element)(c, e) }
+                if (e) { return new(tree.Element)(c, e, i) }
 
                 if (c.value && c.value[0] === '&') {
-                  return new(tree.Element)(c, null);
+                  return new(tree.Element)(c, null, i);
                 }
             },
 
diff --git a/lib/less/tree/element.js b/lib/less/tree/element.js
index 27cf8228..a2f19bea 100644
--- a/lib/less/tree/element.js
+++ b/lib/less/tree/element.js
@@ -1,9 +1,10 @@
 (function (tree) {
 
-tree.Element = function (combinator, value) {
+tree.Element = function (combinator, value, index) {
     this.combinator = combinator instanceof tree.Combinator ?
                       combinator : new(tree.Combinator)(combinator);
     this.value = value ? value.trim() : "";
+    this.index = index;
 };
 tree.Element.prototype.toCSS = function (env) {
     return this.combinator.toCSS(env || {}) + this.value;