1 files changed, 10 insertions, 0 deletions
diff --git a/src/hir/expr.hpp b/src/hir/expr.hpp
index 137377d7..f69429f6 100644
--- a/src/hir/expr.hpp
+++ b/src/hir/expr.hpp
@@ -22,6 +22,16 @@ enum class ValueUsage {
     // Value is moved
     Move,
 };
+static inline ::std::ostream& operator<<(::std::ostream& os, const ValueUsage& x) {
+    switch(x)
+    {
+    case ValueUsage::Unknown: os << "Unknown"; break;
+    case ValueUsage::Borrow:  os << "Borrow";  break;
+    case ValueUsage::Mutate:  os << "Mutate";  break;
+    case ValueUsage::Move:    os << "Move";    break;
+    }
+    return os;
+}
 
 class GenericParams;