https://bugs.kde.org/show_bug.cgi?id=417903
Bug ID: 417903
Summary: Semantic analysis fails to recognize std::filesystem
namespace
Product: kdevelop
Version: 5.5.0
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Analyzer: Cppcheck
Assignee: kdevelop-bugs-n...@kde.org
Reporter: kogiokkaf...@gmail.com
Target Milestone: ---
Created attachment 126186
--> https://bugs.kde.org/attachment.cgi?id=126186&action=edit
Screenshots of semantic analysis error messages.
SUMMARY
Semantic analysis does not recognize std::filesystem even thought
CMAKE_CXX_STANDARD has been set as 17.
STEPS TO REPRODUCE
CMakeLists.txt
====================
cmake_minimum_required(VERSION 3.0)
project(bugreport)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
add_executable(bugreport main.cpp)
install(TARGETS bugreport RUNTIME DESTINATION bin)
====================
main.cpp
====================
#include <iostream>
#include <filesystem>
#include <chrono>
int main()
{
using namespace std::filesystem;
using namespace std::chrono;
namespace fs = std::filesystem;
namespace chr = std::chrono;
std::filesystem::create_directories("sandbox");
std::cout << "Hello, world!" << std::endl;
return 0;
}
====================
OBSERVED RESULT
====================
Problem in Semantic analysis
Location: main.cpp :12
No member named 'filesystem' in namespace 'std'

Solution (1): Insert '#include <boost/filesystem.hpp>'
Solution (2): Insert '#include <experimental/filesystem>'
Solution (3): Insert '#include <filesystem>'
====================
====================
Problem in Semantic analysis
Expected namespace name
====================
EXPECTED RESULT
There should be no semantic analysis error.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.66.0
Qt Version: 5.13.2
ADDITIONAL INFORMATION
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