Allow iteration while exceptions are disabled and reactivate proximate(...) for that case

CMakeLists.txt

@@ -1,8 +1,5 @@
 cmake_minimum_required(VERSION 3.7.2)
-project(
+project(ghcfilesystem VERSION 1.5.15)
-   ghcfilesystem,
-   VERSION 1.5.15
-)
 
 if (POLICY CMP0077)
     cmake_policy(SET CMP0077 NEW)

include/ghc/filesystem.hpp

@@ -181,6 +181,7 @@
 #include <clocale>
 #include <cstdlib>
 #include <cstring>
+#include <exception>
 #include <fstream>
 #include <functional>
 #include <memory>
@@ -932,20 +933,16 @@ public:
     directory_iterator& operator=(directory_iterator&& rhs) noexcept;
     const directory_entry& operator*() const;
     const directory_entry* operator->() const;
-#ifdef GHC_WITH_EXCEPTIONS
     directory_iterator& operator++();
-#endif
     directory_iterator& increment(std::error_code& ec) noexcept;
 
     // other members as required by [input.iterators]
-#ifdef GHC_WITH_EXCEPTIONS
     proxy operator++(int)
     {
         proxy p{**this};
         ++*this;
         return p;
     }
-#endif
     bool operator==(const directory_iterator& rhs) const;
     bool operator!=(const directory_iterator& rhs) const;
 
@@ -992,9 +989,7 @@ public:
     // [fs.rec.dir.itr.members] modifiers recursive_directory_iterator&
     recursive_directory_iterator& operator=(const recursive_directory_iterator& rhs);
     recursive_directory_iterator& operator=(recursive_directory_iterator&& rhs) noexcept;
-#ifdef GHC_WITH_EXCEPTIONS
     recursive_directory_iterator& operator++();
-#endif
     recursive_directory_iterator& increment(std::error_code& ec) noexcept;
 
 #ifdef GHC_WITH_EXCEPTIONS
@@ -1004,14 +999,12 @@ public:
     void disable_recursion_pending();
 
     // other members as required by [input.iterators]
-#ifdef GHC_WITH_EXCEPTIONS
     directory_iterator::proxy operator++(int)
     {
         directory_iterator::proxy proxy{**this};
         ++*this;
         return proxy;
     }
-#endif
     bool operator==(const recursive_directory_iterator& rhs) const;
     bool operator!=(const recursive_directory_iterator& rhs) const;
 
@@ -4751,7 +4744,6 @@ GHC_INLINE void permissions(const path& p, perms prms, perm_options opts, std::e
 #endif
 }
 
-#ifdef GHC_WITH_EXCEPTIONS
 GHC_INLINE path proximate(const path& p, std::error_code& ec)
 {
     auto cp = current_path(ec);
@@ -4760,7 +4752,6 @@ GHC_INLINE path proximate(const path& p, std::error_code& ec)
     }
     return path();
 }
-#endif
 
 #ifdef GHC_WITH_EXCEPTIONS
 GHC_INLINE path proximate(const path& p, const path& base)
@@ -5860,17 +5851,19 @@ GHC_INLINE const directory_entry* directory_iterator::operator->() const
     return &_impl->_dir_entry;
 }
 
-#ifdef GHC_WITH_EXCEPTIONS
 GHC_INLINE directory_iterator& directory_iterator::operator++()
 {
     std::error_code ec;
     _impl->increment(ec);
     if (ec) {
+#ifdef GHC_WITH_EXCEPTIONS
         throw filesystem_error(detail::systemErrorText(ec.value()), _impl->_dir_entry._path, ec);
+#else
+        std::terminate();
+#endif
     }
     return *this;
 }
-#endif
 
 GHC_INLINE directory_iterator& directory_iterator::increment(std::error_code& ec) noexcept
 {
@@ -5986,17 +5979,19 @@ GHC_INLINE recursive_directory_iterator& recursive_directory_iterator::operator=
     return *this;
 }
 
-#ifdef GHC_WITH_EXCEPTIONS
 GHC_INLINE recursive_directory_iterator& recursive_directory_iterator::operator++()
 {
     std::error_code ec;
     increment(ec);
     if (ec) {
+#ifdef GHC_WITH_EXCEPTIONS
         throw filesystem_error(detail::systemErrorText(ec.value()), _impl->_dir_iter_stack.empty() ? path() : _impl->_dir_iter_stack.top()->path(), ec);
+#else
+        std::terminate();
+#endif
     }
     return *this;
 }
-#endif
 
 GHC_INLINE recursive_directory_iterator& recursive_directory_iterator::increment(std::error_code& ec) noexcept
 {

test/CMakeLists.txt

@@ -98,8 +98,12 @@ endif()
 add_test(fwd_impl_test fwd_impl_test)
 
 add_executable(exception exception.cpp)
-if(NOT MSVC)
+if(MSVC)
+    target_compile_options(exception PRIVATE /EHs-c-)
+    target_compile_definitions(exception PRIVATE _HAS_EXCEPTIONS=0)
+else()
     target_compile_options(exception PRIVATE -fno-exceptions)
 endif()
 target_include_directories(exception PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../include)
 SetTestCompileOptions(exception)
+add_test(NAME no_exception_test COMMAND exception "${CMAKE_CURRENT_SOURCE_DIR}/exception.cpp")

test/exception.cpp

@@ -1,5 +1,70 @@
 #include <ghc/filesystem.hpp>
 
-int main() {
+#ifdef GHC_WITH_EXCEPTIONS
+#error "This test must be compiled without exception support"
+#endif
+
+int main(int argc, char** argv)
+{
+    namespace fs = ghc::filesystem;
+
+    if (argc != 2) {
+        return 1;
+    }
+
+    const fs::path regular_file(argv[1]);
+    const fs::path test_directory = regular_file.parent_path();
+    std::error_code ec;
+    const fs::path proximate = fs::proximate(test_directory, ec);
+    if (ec || proximate.empty()) {
+        return 2;
+    }
+
+    fs::directory_iterator invalid_iter(regular_file, ec);
+    if (!ec || invalid_iter != fs::directory_iterator()) {
+        return 3;
+    }
+
+    ec.clear();
+    fs::recursive_directory_iterator invalid_recursive_iter(regular_file, ec);
+    if (!ec || invalid_recursive_iter != fs::recursive_directory_iterator()) {
+        return 4;
+    }
+
+    ec.clear();
+    fs::directory_iterator iter(test_directory, ec);
+    if (ec) {
+        return 5;
+    }
+    if (iter != fs::directory_iterator()) {
+        iter++;
+    }
+    for (; iter != fs::directory_iterator(); ++iter) {
+    }
+
+    for (const auto& entry : fs::directory_iterator(test_directory, ec)) {
+        (void)entry;
+    }
+    if (ec) {
+        return 6;
+    }
+
+    fs::recursive_directory_iterator recursive_iter(test_directory, ec);
+    if (ec) {
+        return 7;
+    }
+    if (recursive_iter != fs::recursive_directory_iterator()) {
+        recursive_iter++;
+    }
+    for (; recursive_iter != fs::recursive_directory_iterator(); ++recursive_iter) {
+    }
+
+    for (const auto& entry : fs::recursive_directory_iterator(test_directory, ec)) {
+        (void)entry;
+    }
+    if (ec) {
+        return 8;
+    }
+
     return 0;
 }