Porting StaticMerger over to :lines, oh and:

HOLY FUCK! I re-wrote the tests, renamed on_multi to on_lines, added another loop. After a few tweaks the first test passed. Then I tried it with the other tests: 0 failures. WTF? I don't know how, but at least it works. It probably makes sense, but I had a major mindfuck and now I'm to tired to understand it.

lib/temple/filters/static_merger.rb

@@ -12,25 +12,29 @@ module Filters
     #     [:static, "Hello World!"]]
     class StaticMerger
       def compile(exp)
-        exp.first == :multi ? on_multi(*exp[1..-1]) : exp
+        exp.first == :lines ? on_lines(*exp[1..-1]) : exp
       end
-
-      def on_multi(*exps)
-        res = [:multi]
+
+      def on_lines(*lines)
+        res = [:lines]
+        curr_line = nil
         curr = nil
         state = :looking
 
-        exps.each do |exp|
-          if exp.first == :static
-            if state == :looking
-              res << [:static, (curr = exp[1].dup)]
-              state = :static
+        lines.each do |line|
+          res << (curr_line = [])
+          line.each do |exp|
+            if exp.first == :static
+              if state == :looking
+                curr_line << [:static, (curr = exp[1].dup)]
+                state = :static
+              else
+                curr << exp[1]
+              end
             else
-              curr << exp[1]
+              curr_line << compile(exp)
+              state = :looking
             end
-          else
-            res << compile(exp)
-            state = :looking
           end
         end
 

spec/static_merger_spec.rb

@@ -2,26 +2,40 @@
 
 describe_filter :StaticMerger do
   it "should merge several statics" do
-    @filter.compile([:multi,
-      [:static, "Hello "],
-      [:static, "World, "],
-      [:static, "Good night"]
-    ]).should == [:multi,
-      [:static, "Hello World, Good night"]
+    @filter.compile([:lines,
+      [[:static, "Hello "],
+       [:static, "World, "],
+       [:static, "Good night"]]
+    ]).should == [:lines,
+      [[:static, "Hello World, Good night"]]
     ]
   end
 
   it "should merge several statics around block" do
-    @filter.compile([:multi,
-      [:static, "Hello "],
-      [:static, "World!"],
-      [:block, "123"],
-      [:static, "Good night, "],
-      [:static, "everybody"]
-    ]).should == [:multi,
-      [:static, "Hello World!"],
-      [:block, "123"],
-      [:static, "Good night, everybody"]
+    @filter.compile([:lines,
+      [[:static, "Hello "],
+       [:static, "World!"],
+       [:block, "123"],
+       [:static, "Good night, "],
+       [:static, "everybody"]]
+    ]).should == [:lines,
+      [[:static, "Hello World!"],
+       [:block, "123"],
+       [:static, "Good night, everybody"]]
+    ]
+  end
+
+  it "should merge several statics across lines" do
+    @filter.compile([:lines,
+      [[:static, "Hello "]],
+      [[:static, "World!"], [:block, "123"]],
+      [[:block, "456"], [:static, "Good "]],
+      [[:static, "night, "], [:static, "everybody"]]
+    ]).should == [:lines,
+      [[:static, "Hello World!"]],
+      [[:block, "123"]],
+      [[:block, "456"], [:static, "Good night, everybody"]],
+      []
     ]
   end
 end