Fix descriptions removal, refactoring, warnings

Author: alabuzhev

_build/ci/travis/build.cmd

@@ -10,6 +10,9 @@ call :%COMPILER%
 :MSVC_PROJ
 set PATH=C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\MSBuild\15.0\Bin;%PATH%
 
+rem print version
+cl
+
 cd far
 MSBuild.exe /property:Configuration=%CONFIG% /property:Platform=%PLATFORM% far.vcxproj || %throw%
 
@@ -20,6 +23,9 @@ MSBuild.exe /property:Configuration=%CONFIG% /property:Platform=%PLATFORM% far.v
 call "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvars%PLATFORM:~-2%.bat" || %throw%
 if %CONFIG%==Debug set DEBUG=1
 
+rem print version
+cl
+
 cd far
 nmake /f makefile_vc %ADD_MAKE% || %throw%
 cd ..
@@ -37,6 +43,9 @@ set PATH=C:\Program Files\LLVM\bin;%PATH%
 set CLANG=1
 if %CONFIG%==Debug set DEBUG=1
 
+rem print version
+clang --version
+
 cd far
 nmake /f makefile_vc %ADD_MAKE% || %throw%
 cd ..
@@ -48,6 +57,9 @@ cd ..
 set PATH=C:\ProgramData\chocolatey\lib\mingw\tools\install\mingw%PLATFORM:~-2%\bin;%PATH%
 if %CONFIG%==Debug set DEBUG=1
 
+rem print version
+gcc --version
+
 cd far
 mingw32-make -j4 -f makefile_gcc %ADD_MAKE% || %throw%
 cd ..

appveyor-clang.yml

@@ -37,6 +37,8 @@ environment:
     bit: 64
 
 build_script:
+  #print version
+  - clang --version
   #build Far
   - cd far
   - set FARMANAGER_BUILD_TYPE=VS_RELEASE

appveyor-gcc.yml

@@ -37,6 +37,8 @@ environment:
     ADD_MAKE: DIRBIT=64
 
 build_script:
+  #print version
+  - gcc --version
   #build Far
   - cd far
   - set FARMANAGER_BUILD_TYPE=VS_RELEASE

appveyor.yml

@@ -88,6 +88,8 @@ build_script:
   - enc/tools/tool.make_lua_chm.bat
   #set vs environment variables
   - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars%bit%.bat"
+  #print version
+  - cl
   #build far
   - cd far 
   - set FARMANAGER_BUILD_TYPE=VS_RELEASE

far/changelog

@@ -1,3 +1,11 @@
+drkns 29.05.2020 18:57:47 +0100 - build 5612
+
+1. В некоторых случаях не удалялись описания файлов.
+
+2. Рефакторинг.
+
+3. Warnings.
+
 svs 27.05.2020 21:30:18 +0300 - build 5611
 
 1. SQLite 3.32.1

far/changelog_eng

@@ -1,3 +1,15 @@
+drkns 29.05.2020 18:57:47 +0100 - build 5612
+
+1. File descriptions weren't removed in some cases.
+
+2. Refactoring.
+
+3. Warnings.
+
+svs 27.05.2020 21:30:18 +0300 - build 5611
+
+1. SQLite 3.32.1
+
 drkns 26.05.2020 08:45:08 +0100 - build 5610
 
 1. Correction of 5608.

far/common/function_traits.hpp

@@ -36,18 +36,13 @@ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 namespace detail
 {
-	template<typename T>
-	using root_type_t = std::remove_cv_t<std::remove_reference_t<std::remove_pointer_t<T>>>;
-
 	template<typename result, typename object, typename... args>
 	struct function_traits_impl
 	{
 		using result_type = result;
 
 		template <size_t i>
 		using arg = std::tuple_element_t<i, std::tuple<args...>>;
-
-		using root_result_type = root_type_t<result>;
 	};
 }
 
@@ -67,6 +62,6 @@ template<typename result, typename object, typename... args>
 struct function_traits<result(object::*)(args...) const>: detail::function_traits_impl<result, object, args...> {};
 
 
-#define FN_RETURN_TYPE(...) function_traits<decltype(&__VA_ARGS__)>::root_result_type
+#define FN_RETURN_TYPE(...) std::decay_t<function_traits<decltype(&__VA_ARGS__)>::result_type>
 
 #endif // FUNCTION_TRAITS_HPP_071DD1DD_F933_40DC_A662_CB85F7BE7F00

far/common/utility.hpp

@@ -32,6 +32,9 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+#include "function_traits.hpp"
+#include "type_traits.hpp"
+
 //----------------------------------------------------------------------------
 
 template<typename T>
@@ -231,6 +234,13 @@ template<typename... args> overload(args&&...) -> overload<args...>;
 template<typename callable, typename variant>
 constexpr decltype(auto) visit_if(callable&& Callable, variant&& Variant)
 {
+	{
+		using arg = typename function_traits<callable>::template arg<0>;
+		using get_arg = decltype(std::get<std::decay_t<arg>>(Variant));
+		// This will fail if callable's arg type is not compatible with the variant:
+		using try_call [[maybe_unused]] = decltype(Callable(std::declval<get_arg>()));
+	}
+
 	return std::visit(overload
 	{
 		FWD(Callable),

far/delete.cpp

@@ -93,7 +93,7 @@ struct total_items
 class ShellDelete : noncopyable
 {
 public:
-	ShellDelete(panel_ptr SrcPanel, delete_type Type, bool UpdateDiz);
+	ShellDelete(panel_ptr SrcPanel, delete_type Type);
 
 	struct progress
 	{
@@ -718,11 +718,18 @@ void ShellDelete::process_item(
 
 }
 
-ShellDelete::ShellDelete(panel_ptr SrcPanel, delete_type const Type, bool const UpdateDiz):
+ShellDelete::ShellDelete(panel_ptr SrcPanel, delete_type const Type):
 	m_DeleteFolders(!Global->Opt->Confirm.DeleteFolder),
-	m_UpdateDiz(UpdateDiz),
+	m_UpdateDiz(Global->Opt->Diz.UpdateMode == DIZ_UPDATE_ALWAYS || (SrcPanel->IsDizDisplayed() && Global->Opt->Diz.UpdateMode == DIZ_UPDATE_IF_DISPLAYED)),
 	m_DeleteType(Type)
 {
+	if (m_UpdateDiz)
+		SrcPanel->ReadDiz();
+
+	const auto strDizName = SrcPanel->GetDizName();
+	const auto CheckDiz = [&] { return !strDizName.empty() && os::fs::exists(strDizName); };
+	const auto DizPresent = CheckDiz();
+
 	SCOPED_ACTION(TPreRedrawFuncGuard)(std::make_unique<DelPreRedrawItem>());
 
 	const auto SelCount = SrcPanel->GetSelCount();
@@ -742,6 +749,9 @@ ShellDelete::ShellDelete(panel_ptr SrcPanel, delete_type const Type, bool const
 
 	SCOPE_EXIT
 	{
+		if (m_UpdateDiz && DizPresent == CheckDiz())
+			SrcPanel->FlushDiz();
+
 		ShellUpdatePanels(SrcPanel, NeedSetUpADir);
 	};
 
@@ -1156,24 +1166,12 @@ bool delayed_deleter::any() const
 
 void Delete(const panel_ptr& SrcPanel, delete_type const Type)
 {
-	const auto UpdateDiz = Global->Opt->Diz.UpdateMode == DIZ_UPDATE_ALWAYS || (SrcPanel->IsDizDisplayed() && Global->Opt->Diz.UpdateMode == DIZ_UPDATE_IF_DISPLAYED);
-
-	if (UpdateDiz)
-		SrcPanel->ReadDiz();
-
-	const auto strDizName = SrcPanel->GetDizName();
-	const auto CheckDiz = [&]{ return !strDizName.empty() && os::fs::exists(strDizName); };
-	const auto DizPresent = CheckDiz();
-
 	try
 	{
-		ShellDelete(SrcPanel, Type, UpdateDiz);
+		ShellDelete(SrcPanel, Type);
 	}
 	catch (const operation_cancelled&)
 	{
 		// Nop
 	}
-
-	if (UpdateDiz && DizPresent == CheckDiz())
-		SrcPanel->FlushDiz();
 }

far/filelist.cpp

@@ -5198,7 +5198,7 @@ void FileList::UpdateKeyBar()
 
 bool FileList::PluginPanelHelp(const plugin_panel* hPlugin) const
 {
-	auto strPath = hPlugin->plugin()->ModuleName();
+	string_view strPath = hPlugin->plugin()->ModuleName();
 	CutToSlash(strPath);
 	const auto [File, Name, Codepage] = OpenLangFile(strPath, Global->HelpFileMask, Global->Opt->strHelpLanguage);
 	if (!File)