Fallback to blocks from deferred calls

lesscpy/plib/deferred.py

@@ -54,17 +54,25 @@ class Deferred(Node):
                         break
                     scope.deferred.parsed[-1].pop()
                 scope.deferred.parsed[-1] = store
+    
+        if not mixins:
+            # Fallback to blocks
+            block = scope.blocks(ident.raw())
+            if block:
+                res = block.copy_inner(scope)
                 
         if mixins:
             for mixin in mixins:
                 res = mixin.call(scope, args)
-                if res: break
-            if res:
-                [scope.add_variable(v) for v in mixin.vars]
-                scope.deferred = ident
+                if res: 
+                    [scope.add_variable(v) for v in mixin.vars]
+                    scope.deferred = ident
+                    break
+                
+        if res:
+            res = [p.parse(scope) for p in res if p]
+            while(any(t for t in res if type(t) is Deferred)):
                 res = [p.parse(scope) for p in res if p]
-                while(any(t for t in res if type(t) is Deferred)):
-                    res = [p.parse(scope) for p in res if p]
                 
         if error and not res:
             raise SyntaxError('NameError `%s`' % mixin.raw(True))

lesscpy/test/css/mixin-blocks.css

@@ -86,3 +86,18 @@ div.nest a:hover .deep p, div.nest a:focus .deep p {
 	padding: 3px;
 	padding: 3px;
 }
+.clear {
+	padding: -100px;
+}
+.clear:before {
+	display: table;
+	content: "";
+}
+.fallback {
+	margin: 2px;
+	padding: -100px;
+}
+.fallback:before {
+	display: table;
+	content: "";
+}

lesscpy/test/css/mixin-blocks.min.css

@@ -25,3 +25,7 @@ div.nest a:hover .deep p,div.nest a:focus .deep p{widows:3;}
 .secure-zone{color:transparent;}
 .outer .inner{padding:3px;}
 .tx{padding:3px;padding:3px;}
+.clear{padding:-100px;}
+.clear:before{display:table;content:"";}
+.fallback{margin:2px;padding:-100px;}
+.fallback:before{display:table;content:"";}

lesscpy/test/less/mixin-blocks.less

@@ -105,4 +105,18 @@ div.nest {
 	.outer .inner;
 	// Same
 	.outer > .inner;
-}
+}
+//
+// Fallbacks
+//
+.clear {
+	padding: -100px;
+	&:before {
+		display: table;
+    	content: "";
+	}
+}
+.fallback {
+	margin: 2px;
+	.clear();
+}