Move std_fs namespace definition into std_fs.hpp

include/nlohmann/detail/conversions/from_json.hpp

@@ -24,28 +24,11 @@
 #include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/meta/cpp_future.hpp>
 #include <nlohmann/detail/meta/identity_tag.hpp>
+#include <nlohmann/detail/meta/std_fs.hpp>
 #include <nlohmann/detail/meta/type_traits.hpp>
 #include <nlohmann/detail/string_concat.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
-#if JSON_HAS_EXPERIMENTAL_FILESYSTEM
-#include <experimental/filesystem>
-NLOHMANN_JSON_NAMESPACE_BEGIN
-namespace detail
-{
-namespace std_fs = std::experimental::filesystem;
-}  // namespace detail
-NLOHMANN_JSON_NAMESPACE_END
-#elif JSON_HAS_FILESYSTEM
-#include <filesystem>
-NLOHMANN_JSON_NAMESPACE_BEGIN
-namespace detail
-{
-namespace std_fs = std::filesystem;
-}  // namespace detail
-NLOHMANN_JSON_NAMESPACE_END
-#endif
-
 NLOHMANN_JSON_NAMESPACE_BEGIN
 namespace detail
 {

include/nlohmann/detail/conversions/to_json.hpp

@@ -20,27 +20,10 @@
 #include <nlohmann/detail/iterators/iteration_proxy.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/meta/cpp_future.hpp>
+#include <nlohmann/detail/meta/std_fs.hpp>
 #include <nlohmann/detail/meta/type_traits.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
-#if JSON_HAS_EXPERIMENTAL_FILESYSTEM
-#include <experimental/filesystem>
-NLOHMANN_JSON_NAMESPACE_BEGIN
-namespace detail
-{
-namespace std_fs = std::experimental::filesystem;
-}  // namespace detail
-NLOHMANN_JSON_NAMESPACE_END
-#elif JSON_HAS_FILESYSTEM
-#include <filesystem>
-NLOHMANN_JSON_NAMESPACE_BEGIN
-namespace detail
-{
-namespace std_fs = std::filesystem;
-}  // namespace detail
-NLOHMANN_JSON_NAMESPACE_END
-#endif
-
 NLOHMANN_JSON_NAMESPACE_BEGIN
 namespace detail
 {

include/nlohmann/detail/meta/std_fs.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <nlohmann/detail/macro_scope.hpp>
+
+#if JSON_HAS_EXPERIMENTAL_FILESYSTEM
+#include <experimental/filesystem>
+NLOHMANN_JSON_NAMESPACE_BEGIN
+namespace detail
+{
+namespace std_fs = std::experimental::filesystem;
+}  // namespace detail
+NLOHMANN_JSON_NAMESPACE_END
+#elif JSON_HAS_FILESYSTEM
+#include <filesystem>
+NLOHMANN_JSON_NAMESPACE_BEGIN
+namespace detail
+{
+namespace std_fs = std::filesystem;
+}  // namespace detail
+NLOHMANN_JSON_NAMESPACE_END
+#endif

single_include/nlohmann/json.hpp

@@ -4449,11 +4449,10 @@ template <class T> struct identity_tag {};
 }  // namespace detail
 NLOHMANN_JSON_NAMESPACE_END
 
-// #include <nlohmann/detail/meta/type_traits.hpp>
+// #include <nlohmann/detail/meta/std_fs.hpp>
 
-// #include <nlohmann/detail/string_concat.hpp>
 
-// #include <nlohmann/detail/value_t.hpp>
+// #include <nlohmann/detail/macro_scope.hpp>
 
 
 #if JSON_HAS_EXPERIMENTAL_FILESYSTEM
@@ -4474,6 +4473,13 @@ namespace std_fs = std::filesystem;
 NLOHMANN_JSON_NAMESPACE_END
 #endif
 
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/string_concat.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
 NLOHMANN_JSON_NAMESPACE_BEGIN
 namespace detail
 {
@@ -5212,29 +5218,13 @@ class tuple_element<N, ::nlohmann::detail::iteration_proxy_value<IteratorType >>
 
 // #include <nlohmann/detail/meta/cpp_future.hpp>
 
+// #include <nlohmann/detail/meta/std_fs.hpp>
+
 // #include <nlohmann/detail/meta/type_traits.hpp>
 
 // #include <nlohmann/detail/value_t.hpp>
 
 
-#if JSON_HAS_EXPERIMENTAL_FILESYSTEM
-#include <experimental/filesystem>
-NLOHMANN_JSON_NAMESPACE_BEGIN
-namespace detail
-{
-namespace std_fs = std::experimental::filesystem;
-}  // namespace detail
-NLOHMANN_JSON_NAMESPACE_END
-#elif JSON_HAS_FILESYSTEM
-#include <filesystem>
-NLOHMANN_JSON_NAMESPACE_BEGIN
-namespace detail
-{
-namespace std_fs = std::filesystem;
-}  // namespace detail
-NLOHMANN_JSON_NAMESPACE_END
-#endif
-
 NLOHMANN_JSON_NAMESPACE_BEGIN
 namespace detail
 {