Merge branch 'feature-200-fstream-test'

README.md

@@ -239,6 +239,7 @@ you might use:
 
 #ifdef GHC_USE_STD_FS
     #include <filesystem>
+    #include <fstream>
     namespace fs {
         using namespace std::filesystem;
         using ifstream = std::ifstream;
@@ -318,6 +319,7 @@ switching like this:
 
 #ifdef GHC_USE_STD_FS
     #include <filesystem>
+    #include <fstream>
     namespace fs {
         using namespace std::filesystem;
         using ifstream = std::ifstream;

include/ghc/fs_std.hpp

@@ -58,6 +58,7 @@
 
 #ifdef GHC_USE_STD_FS
     #include <filesystem>
+    #include <fstream>
     namespace fs {
         using namespace std::filesystem;
         using ifstream = std::ifstream;

include/ghc/fs_std_fwd.hpp

@@ -60,6 +60,7 @@
 
 #ifdef GHC_USE_STD_FS
     #include <filesystem>
+    #include <fstream>
     namespace fs {
         using namespace std::filesystem;
         using ifstream = std::ifstream;

test/CMakeLists.txt

@@ -97,6 +97,14 @@ if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
 endif()
 add_test(fwd_impl_test fwd_impl_test)
 
+if("cxx_std_17" IN_LIST GHC_FILESYSTEM_TEST_COMPILE_FEATURES)
+    add_executable(fs_std_header_test fs_std_header_test.cpp fs_std_fwd_header_test.cpp)
+    target_link_libraries(fs_std_header_test ghc_filesystem)
+    target_compile_features(fs_std_header_test PRIVATE cxx_std_17)
+    SetTestCompileOptions(fs_std_header_test)
+    add_test(fs_std_header_test fs_std_header_test)
+endif()
+
 add_executable(exception exception.cpp)
 if(MSVC)
     # MSVC 2015 warns for noexcept declarations when exception handling is disabled.

test/fs_std_fwd_header_test.cpp

@@ -0,0 +1,8 @@
+#define GHC_USE_STD_FS
+#include <ghc/fs_std_fwd.hpp>
+
+bool fs_std_fwd_header_test()
+{
+    fs::fstream stream;
+    return stream.is_open();
+}

test/fs_std_header_test.cpp

@@ -0,0 +1,10 @@
+#define GHC_USE_STD_FS
+#include <ghc/fs_std.hpp>
+
+bool fs_std_fwd_header_test();
+
+int main()
+{
+    fs::ifstream stream;
+    return stream.is_open() || fs_std_fwd_header_test() ? 1 : 0;
+}