xo-expression: + Lambda (function definitions)

src/expression/CMakeLists.txt

@@ -4,6 +4,7 @@ set(SELF_LIB xo_expression)
 set(SELF_SRCS
     Expression.cpp
     Apply.cpp
+    Lambda.cpp
     #init_reflect.cpp
 )
 

src/expression/Lambda.cpp

@@ -0,0 +1,19 @@
+/* @file Lambda.cpp */
+
+#include "Lambda.hpp"
+#include "xo/indentlog/print/vector.hpp"
+
+namespace xo {
+    namespace ast {
+        void
+        Lambda::display(std::ostream & os) const {
+            os << "<Lambda"
+               << xtag("argv", argv_)
+               << xtag("body", body_)
+               << ">";
+        } /*display*/
+    } /*namespace ast*/
+} /*namespace xo*/
+
+
+/* end Lambda.cpp */