c++ std::filesystem discussion, std::filesystem was added to the ISO C++ standard library in C++17
Specification available from http://en.cppreference.com/w/cpp/filesystem
Questions tagged [std-filesystem]
165 questions
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1 answer
C++ MFC reading Cstring from editbox for file reading (std::filesystem Exception unhandled memory problem)
What my code is suppose to achieve is to read in the file names after given a file path input and output (switch 1: the files under the same folder)(switch 2: all the file names under the directory including sub-directories), and to not store the…
Mochideer
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1
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1 answer
recursive_directory_iterator's skip_permission_denied option appears to be ignored on macOS?
Using C++20 and std::filesystem::recursive_directory_iterator on macOS, this code:
for (auto& f : recursive_directory_iterator(getenv("HOME"), directory_options::skip_permission_denied)) {
// dummy
}
Which should, according to my understanding…
Ethan McTague
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1
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1 answer
What type would you use for passing file paths in your C++ library API?
Since I started using C++17 every time I have to develop a new library I consider several alternatives for passing file paths to public functions/methods. These are some of my thoughts I normally have regarding this topic:
By using…
piponazo
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1 answer
‘operator/’ is not a member of ‘std::filesystem’; did you mean ‘operator~'
I am trying to install the MMMTools https://mmm.humanoids.kit.edu/installation.html. My cmake version is 3.16.3. I went through every step without any errors until this section
cd ~/MMMCore
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release…
Kong
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1
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0 answers
Segmentation fault with std::filesystem path object
I have recently started using std::filesystem, and I have faced an issue that I could not fix. I have a class with a function that periodically iterates over some directories and in case new files are found, it adds its name and size to a map…
Ma Ta
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1 answer
No reverse iterators for `std::filesystem::path`?
Is there a technical reason why std::filesystem::path doesn't offer reverse iterators (i.e., rbegin and rend)?
If I have a std::filesystem::path for /a/b/c/b/d/b/e and I want to find the first component that matches b, I can use std::find(p.begin(),…
Adrian McCarthy
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1 answer
C++ directory item iteration without exceptions
In C++17 it became easy to iterate over the items in some directory dir:
for ( auto& dirEntry: std::filesystem::directory_iterator(dir) )
{
if ( !dirEntry.is_regular_file() ) continue;
...
Unfortunately this way may throw exceptions, which I want…
Fedor
- 17,146
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1
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2 answers
VS error from std::filesystem::u8path(const char8_t*)
In this simple C++20 program
#define _SILENCE_CXX20_U8PATH_DEPRECATION_WARNING //suppress VS warning
#include
int main()
{
auto p = std::filesystem::u8path(u8"a");
}
I get the error from Visual Studio 2019 16.10.0 in stdcpplatest…
Fedor
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1 answer
Getting the path of recursively iterated directories relative to the specified entry path
Consider the example in the documentation of std::filesystem::recursive_directory_iterator:
#include
#include
#include
namespace fs = std::filesystem;
int main()
{
fs::current_path(fs::temp_directory_path());
…
DarioP
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1
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2 answers
How can i return an error to std::filesystem?
For example, this is how I do it using runtime_error
#include
#include
std::exception &foo(){
try {
if(!std::filesystem::is_directory(std::filesystem::path("sdfsdf"))){
throw…
wecandoit
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1 answer
Output for directory_entry conflicts with overloaded ostream operator<< for class with variant
I have a project where I print std::filesystem::directory_entry from directory_iterator. On the other side, I have a completely independent class with overload std::ostream& operator<<, that has a templated constructor, which initializes a…
Askold Ilvento
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1 answer
c++ 17 filesystem::recursive_directory_iterator() gives error no such directory on mac but works on windows
Configurations
macOS: 10.15.5
xcode: 11.5
clang: 11.0.3
Project is set to c++17
I am new to macOS and trying to solve a simple problem..
#include
#include
using namespace std;
namespace fs = std::filesystem;
int main(int…
AtiqGauri
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1 answer
Mac c++ filesystem library not recognized
NOTE: this does not fail to #include . It fails afterward.
I’m on a macOS 10.15, using clang 11. Output of clang --version:
Apple clang version 11.0.0 (clang-1100.0.33.17)
Target: x86_64-apple-darwin19.4.0
Thread model:…
owengall
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1
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0 answers
Compilation fail with "std::filesystem" on raspberry
I have "Raspberry Pi 3 Model B" with "Raspbian Buster with desktop" installed on SD-card.
I installed all the necessary to compile with g++:
gcc (Raspbian 8.3.0-6+rpi1) 8.3.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software;…
debugasm
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1
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0 answers
std::filesystem copy_file failure
I am trying to make a copy of a file.
This code runs without error, but the copied file is incomplete:
#include
#include
using namespace std;
int main()
{
error_code ec;
filesystem::copy_file(
…
ravenspoint
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