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Updated readme with some fallback use-case help and adapted the tests to reflect parts of it.

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This commit is contained in:
Steffen Schuemann 2018-09-22 13:37:04 +02:00
parent cf48497662
commit 90bab0edee
2 changed files with 28 additions and 17 deletions
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25
README.md
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@ -45,7 +45,7 @@ if you can't use it.
Tests are currently run with:
* macOS 10.12: XCode 9.2 (clang-900.0.39.2), GCC 8.1.0, Clang 8.0.0 (HEAD, homebrew)
* Windows 10: Visual Studio 2017 15.7.4, MingW GCC 5.3
* Windows 10: Visual Studio 2017 15.8.5, MingW GCC 5.3
* Linux: Ubuntu 18.04LTS GCC 7.3 & GCC 8.0.1
@ -83,10 +83,11 @@ As it is a header-only library, it should be enough to copy the header
into your project folder oder point your include path to this directory and
simply include the `filesystem.h` header.
Everything is in the namespace `ghc::filesystem`, so one way to use it could be:
Everything is in the namespace `ghc::filesystem`, so one way to use it only as
a fallback could be:
```cpp
#if defined(__cplusplus) && __cplusplus >= 201703L
#if defined(__cplusplus) && __cplusplus >= 201703L && defined(__has_include) && __has_include(<filesystem>)
#include <filesystem>
namespace fs = std::filesystem;
#else
@ -95,16 +96,26 @@ namespace fs = ghc::filesystem;
#endif
```
If you are paranoid you can add the feature tests of C++17 to ensure your compiler
already has std::filesystem when using `-std=c++17`:
If you want to also use the `fstream` wrapper with `path` support as fallback,
you might use:
```cpp
#if defined(__has_include) && __has_include(<filesystem>)
#include <filesystem>
namespace fs = std::filesystem;
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
}
#else
#include "filesystem.h"
namespace fs = ghc::filesystem;
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
```

20
test/filesystem_test.cpp
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@ -45,12 +45,12 @@
#ifdef USE_STD_FS
#include <filesystem>
namespace fs = std::filesystem;
namespace ghc {
namespace fs {
using namespace std::filesystem;
using ifstream = std::ifstream;
using ofstream = std::ofstream;
using fstream = std::fstream;
} // namespace ghc
}
#ifdef __GNUC__
#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
#endif
@ -63,12 +63,12 @@ using fstream = std::fstream;
#else
#define NOMINMAX
#include "../filesystem.h"
namespace fs = ghc::filesystem;
namespace ghc {
using ifstream = filesystem::ifstream;
using ofstream = filesystem::ofstream;
using fstream = filesystem::fstream;
} // namespace ghc
namespace fs {
using namespace ghc::filesystem;
using ifstream = ghc::filesystem::ifstream;
using ofstream = ghc::filesystem::ofstream;
using fstream = ghc::filesystem::fstream;
}
#endif
#define CATCH_CONFIG_MAIN
@ -128,7 +128,7 @@ private:
static void generateFile(const fs::path& pathname, int withSize = -1)
{
ghc::ofstream outfile(pathname.string());
fs::ofstream outfile(pathname.string());
if (withSize < 0) {
outfile << "Hello world!" << std::endl;
}