Add 'xo-reader/' from commit 'c46c0f1cc4'

git-subtree-dir: xo-reader
git-subtree-mainline: dacdeb2cd7
git-subtree-split: c46c0f1cc4

xo-reader/src/reader/envframe.cpp

@@ -0,0 +1,34 @@
+/* file envframe.cpp
+ *
+ * author: Roland Conybeare
+ */
+
+#include "envframe.hpp"
+#include "xo/indentlog/print/vector.hpp"
+
+namespace xo {
+    using xo::ast::Variable;
+
+    namespace scm {
+        rp<Variable>
+        envframe::lookup(const std::string & x) const {
+            for (const auto & var : argl_) {
+                if (x == var->name())
+                    return var;
+            }
+
+            return nullptr;
+        }
+
+        void
+        envframe::print(std::ostream & os) const {
+            os << "<envframe"
+               << xtag("argl", argl_)
+               << ">";
+        }
+
+    } /*namespace scm */
+} /*namespace xo*/
+
+
+/* end envframe.cpp */