From 9aaf2f39e03fa1cc3f5cac212e66b210a0b595a0 Mon Sep 17 00:00:00 2001
From: Nathan Weizenbaum <nex342@gmail.com>
Date: Fri, 17 Apr 2009 02:14:38 -0700
Subject: [PATCH] [Haml] Interpret #{} at the beginning of a line as
 interpolation.

Closes gh-1
---
 lib/haml/precompiler.rb  | 5 ++++-
 test/haml/engine_test.rb | 5 +++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/haml/precompiler.rb b/lib/haml/precompiler.rb
index 9c5b7a79..10243657 100644
--- a/lib/haml/precompiler.rb
+++ b/lib/haml/precompiler.rb
@@ -195,7 +195,10 @@ END
       @index = index + 1
 
       case text[0]
-      when DIV_CLASS, DIV_ID; render_div(text)
+      when DIV_CLASS; render_div(text)
+      when DIV_ID
+        return push_plain(text) if text[1] == ?{
+        render_div(text)
       when ELEMENT; render_tag(text)
       when COMMENT; render_comment(text[1..-1].strip)
       when SANITIZE
diff --git a/test/haml/engine_test.rb b/test/haml/engine_test.rb
index 8669b2be..10e84b66 100644
--- a/test/haml/engine_test.rb
+++ b/test/haml/engine_test.rb
@@ -139,6 +139,11 @@ class EngineTest < Test::Unit::TestCase
                  render("\"title '\#{\"Title\"}'. \""))
   end
 
+  def test_interpolation_at_the_beginning_of_a_line
+    assert_equal("<p>2</p>\n", render('%p #{1 + 1}'))
+    assert_equal("<p>\n  2\n</p>\n", render("%p\n  \#{1 + 1}"))
+  end
+
   def test_nil_tag_value_should_render_as_empty
     assert_equal("<p></p>\n", render("%p= nil"))
   end