From bbc15a413bb54251f23e00175a7e534cec896c58 Mon Sep 17 00:00:00 2001
From: seven-phases-max <seven.phases.max@gmail.com>
Date: Sun, 22 Dec 2013 18:54:39 +0400
Subject: [PATCH] `default` function: added error when used with css-guards.
 updated tests.

---
 lib/less/tree/ruleset.js                     |  8 +++++++-
 test/css/mixins-guards-default-func.css      |  6 ++++++
 test/less/errors/css-guard-default-func.less |  4 ++++
 test/less/errors/css-guard-default-func.txt  |  4 ++++
 test/less/mixins-guards-default-func.less    | 20 ++++++++++++++++++++
 5 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 test/less/errors/css-guard-default-func.less
 create mode 100644 test/less/errors/css-guard-default-func.txt

diff --git a/lib/less/tree/ruleset.js b/lib/less/tree/ruleset.js
index 0618c245..d224df8d 100644
--- a/lib/less/tree/ruleset.js
+++ b/lib/less/tree/ruleset.js
@@ -19,12 +19,18 @@ tree.Ruleset.prototype = {
         }
     },
     eval: function (env) {
-        var thisSelectors = this.selectors, selectors, selCnt, i;
+        var thisSelectors = this.selectors, selectors, 
+            selCnt, i, defaultFunc = tree.defaultFunc;
         if (thisSelectors && (selCnt = thisSelectors.length)) {
             selectors = [];
+            defaultFunc.error({
+                type: "Syntax", 
+                message: "it is currently only allowed in parametric mixin guards," 
+            });
             for (i = 0; i < selCnt; i++) {
                 selectors.push(thisSelectors[i].eval(env));
             }
+            defaultFunc.reset();  
         }
 
         var rules = this.rules ? this.rules.slice(0) : null,
diff --git a/test/css/mixins-guards-default-func.css b/test/css/mixins-guards-default-func.css
index efc99385..4b6910c3 100644
--- a/test/css/mixins-guards-default-func.css
+++ b/test/css/mixins-guards-default-func.css
@@ -112,3 +112,9 @@ guard-default-multi-4 {
   always: 2;
   case: 2;
 }
+guard-default-scopes-3 {
+  3: when default;
+}
+guard-default-scopes-1 {
+  1: no condition;
+}
diff --git a/test/less/errors/css-guard-default-func.less b/test/less/errors/css-guard-default-func.less
new file mode 100644
index 00000000..db6639e1
--- /dev/null
+++ b/test/less/errors/css-guard-default-func.less
@@ -0,0 +1,4 @@
+
+selector when (default()) {
+    color: red;
+}
diff --git a/test/less/errors/css-guard-default-func.txt b/test/less/errors/css-guard-default-func.txt
new file mode 100644
index 00000000..ea670295
--- /dev/null
+++ b/test/less/errors/css-guard-default-func.txt
@@ -0,0 +1,4 @@
+SyntaxError: error evaluating function `default`: it is currently only allowed in parametric mixin guards, in {path}css-guard-default-func.less on line 2, column 16:
+1 
+2 selector when (default()) {
+3     color: red;
diff --git a/test/less/mixins-guards-default-func.less b/test/less/mixins-guards-default-func.less
index 7b75dd93..56a8e4b6 100644
--- a/test/less/mixins-guards-default-func.less
+++ b/test/less/mixins-guards-default-func.less
@@ -157,3 +157,23 @@ guard-default-multi-4 {
     .m(1);
     .m(2);
 }
+
+// default & scope
+
+guard-default-scopes {
+    .s1() {.m(@v)                  {1: no condition}}
+    .s2() {.m(@v) when (@v)        {2: when true}}
+    .s3() {.m(@v) when (default()) {3: when default}}
+
+    &-3 {
+        .s2();
+        .s3();
+        .m(false);
+    }
+    
+    &-1 {
+        .s1();
+        .s3();
+        .m(false);
+    }
+}