add boost on mac

macx64/include/boost/gil/io/get_reader.hpp

@@ -0,0 +1,168 @@
+//
+// Copyright 2012 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_IO_GET_READER_HPP
+#define BOOST_GIL_IO_GET_READER_HPP
+
+#include <boost/gil/io/get_read_device.hpp>
+
+#include <boost/mpl/and.hpp>
+
+#include <type_traits>
+
+namespace boost { namespace gil {
+
+/// \brief Helper metafunction to generate image reader type.
+template
+<
+    typename T,
+    typename FormatTag,
+    typename ConversionPolicy,
+    class Enable = void
+>
+struct get_reader {};
+
+template <typename String, typename FormatTag, typename ConversionPolicy>
+struct get_reader
+<
+    String,
+    FormatTag,
+    ConversionPolicy,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_supported_path_spec<String>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type
+>
+{
+    using device_t = typename get_read_device<String, FormatTag>::type;
+    using type = reader<device_t, FormatTag, ConversionPolicy>;
+};
+
+template <typename Device, typename FormatTag, typename ConversionPolicy>
+struct get_reader
+<
+    Device,
+    FormatTag,
+    ConversionPolicy,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_adaptable_input_device<FormatTag, Device>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type
+>
+{
+    using device_t = typename get_read_device<Device, FormatTag>::type;
+    using type = reader<device_t, FormatTag, ConversionPolicy>;
+};
+
+/// \brief Helper metafunction to generate dynamic image reader type.
+template <typename T, typename FormatTag, class Enable = void>
+struct get_dynamic_image_reader
+{
+};
+
+template <typename String, typename FormatTag>
+struct get_dynamic_image_reader
+<
+    String,
+    FormatTag,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_supported_path_spec<String>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type
+>
+{
+    using device_t = typename get_read_device<String, FormatTag>::type;
+    using type = dynamic_image_reader<device_t, FormatTag>;
+};
+
+template <typename Device, typename FormatTag>
+struct get_dynamic_image_reader
+<
+    Device,
+    FormatTag,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_adaptable_input_device<FormatTag, Device>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type
+>
+{
+    using device_t = typename get_read_device<Device, FormatTag>::type;
+    using type = dynamic_image_reader<device_t, FormatTag>;
+};
+
+/// \brief Helper metafunction to generate image backend type.
+template <typename T, typename FormatTag, class Enable = void>
+struct get_reader_backend
+{
+};
+
+template <typename String, typename FormatTag>
+struct get_reader_backend
+<
+    String,
+    FormatTag,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_supported_path_spec<String>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type
+>
+{
+    using device_t = typename get_read_device<String, FormatTag>::type;
+    using type = reader_backend<device_t, FormatTag>;
+};
+
+template <typename Device, typename FormatTag>
+struct get_reader_backend
+<
+    Device,
+    FormatTag,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_adaptable_input_device<FormatTag, Device>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type
+>
+{
+    using device_t = typename get_read_device<Device, FormatTag>::type;
+    using type = reader_backend<device_t, FormatTag>;
+};
+
+/// \brief Helper metafunction to generate image scanline_reader type.
+template <typename T, typename FormatTag>
+struct get_scanline_reader
+{
+    using device_t = typename get_read_device<T, FormatTag>::type;
+    using type = scanline_reader<device_t, FormatTag>;
+};
+
+} // namespace gil
+} // namespace boost
+
+#endif