1 files changed, 52 insertions, 0 deletions
diff --git a/Ix/CPP/src/cpplinq/linq_select.hpp b/Ix/CPP/src/cpplinq/linq_select.hpp
new file mode 100644
index 0000000..650a1dc
--- /dev/null
+++ b/Ix/CPP/src/cpplinq/linq_select.hpp
@@ -0,0 +1,52 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#if !defined(CPPLINQ_LINQ_SELECT_HPP)
+#define CPPLINQ_LINQ_SELECT_HPP
+#pragma once
+
+namespace cpplinq 
+{
+    template <class Collection, class Selector>
+    class linq_select
+    {
+        typedef typename Collection::cursor 
+            inner_cursor;
+    public:
+        struct cursor {
+            typedef typename util::result_of<Selector(typename inner_cursor::element_type)>::type
+                reference_type;
+            typedef typename std::remove_reference<reference_type>::type
+                element_type;
+            typedef typename inner_cursor::cursor_category
+                cursor_category;
+            
+            cursor(const inner_cursor& cur, Selector sel) : cur(cur), sel(std::move(sel)) {}
+
+            void forget() { cur.forget(); }
+            bool empty() const { return cur.empty(); }
+            void inc() { cur.inc(); }
+            reference_type get() const { return sel(cur.get()); }
+
+            bool atbegin() const { return cur.atbegin(); }
+            void dec() { cur.dec(); }
+
+            void skip(size_t n) { cur.skip(n); }
+            size_t position() const { return cur.position(); }
+            size_t size() const { return cur.size(); }
+        private:
+            inner_cursor    cur;
+            Selector        sel;
+        };
+
+        linq_select(const Collection& c, Selector sel) : c(c), sel(sel) {}
+
+        cursor get_cursor() const { return cursor(c.get_cursor(), sel); }
+
+    private:
+        Collection c;
+        Selector sel;
+    };
+
+}
+
+#endif // defined(CPPLINQ_LINQ_SELECT_HPP)