Fixing commented-out if-clauses or empty if-clauses.

lib/rewriter.js

@@ -170,6 +170,10 @@
       return this.scanTokens((function(__this) {
         var __func = function(prev, token, post, i) {
           var idx, indent, insertion, outdent, parens, pre, starter, tok;
+          if (token[0] === 'ELSE' && prev[0] !== 'OUTDENT') {
+            this.tokens.splice(i, 0, ['INDENT', 2, token[2]], ['OUTDENT', 2, token[2]]);
+            return 2;
+          }
           if (!(include(SINGLE_LINERS, token[0]) && post[0] !== 'INDENT' && !(token[0] === 'ELSE' && post[0] === 'IF'))) {
             return 1;
           }

src/rewriter.coffee

@@ -134,6 +134,9 @@ exports.Rewriter: class Rewriter
   # but we need to make sure it's balanced.
   addImplicitIndentation: ->
     @scanTokens (prev, token, post, i) =>
+      if token[0] is 'ELSE' and prev[0] isnt 'OUTDENT'
+        @tokens.splice i, 0, ['INDENT', 2, token[2]], ['OUTDENT', 2, token[2]]
+        return 2
       return 1 unless include(SINGLE_LINERS, token[0]) and
         post[0] isnt 'INDENT' and
         not (token[0] is 'ELSE' and post[0] is 'IF')

test/test_if.coffee

@@ -44,3 +44,19 @@ ok result is 'ya'
 # Testing inline funcs with inline if-elses.
 func: -> if 1 < 0.5 then 1 else -1
 ok func() is -1
+
+
+# Testing empty or commented if statements ... should compile:
+result: if false
+else if false
+else
+
+ok result is undefined
+
+result: if false
+  # comment
+else if true
+  # comment
+else
+
+ok result is undefined