From 0ed2885ececf079f16b42fec60a4dc86285b5101 Mon Sep 17 00:00:00 2001
From: zheng_wenlong <wenlong_zheng@nexty-ele.com>
Date: Wed, 7 Nov 2018 11:06:42 +0900
Subject: add tbtnavi source

---
 include/mapbox/variant_io.hpp | 45 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 include/mapbox/variant_io.hpp

(limited to 'include/mapbox/variant_io.hpp')

diff --git a/include/mapbox/variant_io.hpp b/include/mapbox/variant_io.hpp
new file mode 100644
index 0000000..1456cc5
--- /dev/null
+++ b/include/mapbox/variant_io.hpp
@@ -0,0 +1,45 @@
+#ifndef MAPBOX_UTIL_VARIANT_IO_HPP
+#define MAPBOX_UTIL_VARIANT_IO_HPP
+
+#include <iosfwd>
+
+#include <mapbox/variant.hpp>
+
+namespace mapbox {
+namespace util {
+
+namespace detail {
+// operator<< helper
+template <typename Out>
+class printer
+{
+public:
+    explicit printer(Out& out)
+        : out_(out) {}
+    printer& operator=(printer const&) = delete;
+
+    // visitor
+    template <typename T>
+    void operator()(T const& operand) const
+    {
+        out_ << operand;
+    }
+
+private:
+    Out& out_;
+};
+}
+
+// operator<<
+template <typename CharT, typename Traits, typename... Types>
+VARIANT_INLINE std::basic_ostream<CharT, Traits>&
+operator<<(std::basic_ostream<CharT, Traits>& out, variant<Types...> const& rhs)
+{
+    detail::printer<std::basic_ostream<CharT, Traits>> visitor(out);
+    apply_visitor(visitor, rhs);
+    return out;
+}
+} // namespace util
+} // namespace mapbox
+
+#endif // MAPBOX_UTIL_VARIANT_IO_HPP
-- 
cgit