3 files changed, 13 insertions, 4 deletions
diff --git a/src/core/CSS.cpp b/src/core/CSS.cpp
index c3900e8..d131fec 100644
--- a/src/core/CSS.cpp
+++ b/src/core/CSS.cpp
@@ -20,6 +20,12 @@
 
 namespace ousia {
 
+void RuleSet::merge(Rooted<RuleSet> other){
+	for(auto& o : other->rules){
+		rules[o.first] = o.second;
+	}
+}
+
 /*
  * different versions of "getChildren".
  */
diff --git a/src/core/CSS.hpp b/src/core/CSS.hpp
index 4cf15be..aa701b5 100644
--- a/src/core/CSS.hpp
+++ b/src/core/CSS.hpp
@@ -85,10 +85,11 @@ public:
 		return rules;
 	}
 
-	void merge(Rooted<RuleSet> other)
-	{
-		rules.insert(other->rules.begin(), other->rules.end());
-	}
+	/**
+	 * This implements an overriding "insert all" of all rules in the other
+	 * RuleSet to the rules in this RuleSet.
+	 */
+	void merge(Rooted<RuleSet> other);
 };
 
 /**
diff --git a/src/core/Tokenizer.hpp b/src/core/Tokenizer.hpp
index 4aebf56..8f80150 100644
--- a/src/core/Tokenizer.hpp
+++ b/src/core/Tokenizer.hpp
@@ -225,6 +225,8 @@ public:
 	void consumePeek();
 
 	const BufferedCharReader &getInput() const { return input; }
+	
+	BufferedCharReader &getInput() { return input; }
 };
 }