1 files changed, 20 insertions, 1 deletions
diff --git a/src/parse/tokentree.cpp b/src/parse/tokentree.cpp
index 8fad6386..25e8ad44 100644
--- a/src/parse/tokentree.cpp
+++ b/src/parse/tokentree.cpp
@@ -11,7 +11,7 @@
 TokenTree TokenTree::clone() const
 {
     if( m_subtrees.size() == 0 ) {
-        return TokenTree(m_tok.clone());
+        return TokenTree(m_hygiene, m_tok.clone());
     }
     else {
         ::std::vector< TokenTree>   ents;
@@ -21,3 +21,22 @@ TokenTree TokenTree::clone() const
         return TokenTree( m_hygiene, mv$(ents) );
     }
 }
+
+::std::ostream& operator<<(::std::ostream& os, const TokenTree& tt)
+{
+    os << tt.m_hygiene;
+    if( tt.m_subtrees.size() == 0 )
+        return os << tt.m_tok;
+    else {
+        os << "TT([";
+        bool first = true;
+        for(const auto& i : tt.m_subtrees) {
+            if(!first)
+                os << ", ";
+            os << i;
+            first = false;
+        }
+        os << "])";
+        return os;
+    }
+}