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feature: support compilers that use std::experimental::filesystem (#3840)

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* feature: support compilers that use std::experimental::filesystem such as gcc7

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* only use this feature if cpp17

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* more specific namespace alias + style

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* move to pybind11 namespace

* no namespace alias

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Co-authored-by: Lonnie Souder II <lonnie.souder@g6labs.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
This commit is contained in:
Lonnie L. Souder II 2022-04-01 01:16:10 -04:00 committed by GitHub
parent 65ec5de52f
commit b3ebd11d98
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1 changed files with 21 additions and 7 deletions
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24
include/pybind11/stl/filesystem.h
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@ -13,21 +13,28 @@
#include <string> #include <string>
#ifdef __has_include #ifdef __has_include
# if defined(PYBIND11_CPP17) && __has_include(<filesystem>) # if defined(PYBIND11_CPP17)
# if __has_include(<filesystem>) && \
PY_VERSION_HEX >= 0x03060000
# include <filesystem> # include <filesystem>
# define PYBIND11_HAS_FILESYSTEM 1 # define PYBIND11_HAS_FILESYSTEM 1
# elif __has_include(<experimental/filesystem>)
# include <experimental/filesystem>
# define PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM 1
# endif
# endif # endif
#endif #endif
#if !defined(PYBIND11_HAS_FILESYSTEM) && !defined(PYBIND11_HAS_FILESYSTEM_IS_OPTIONAL) #if !defined(PYBIND11_HAS_FILESYSTEM) && !defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM) \
&& !defined(PYBIND11_HAS_FILESYSTEM_IS_OPTIONAL)
# error \ # error \
"#include <filesystem> is not available. (Use -DPYBIND11_HAS_FILESYSTEM_IS_OPTIONAL to ignore.)" "Neither #include <filesystem> nor #include <experimental/filesystem is available. (Use -DPYBIND11_HAS_FILESYSTEM_IS_OPTIONAL to ignore.)"
#endif #endif
PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE) PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
PYBIND11_NAMESPACE_BEGIN(detail) PYBIND11_NAMESPACE_BEGIN(detail)
#if defined(PYBIND11_HAS_FILESYSTEM) #if defined(PYBIND11_HAS_FILESYSTEM) || defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM)
template <typename T> template <typename T>
struct path_caster { struct path_caster {
@ -94,9 +101,16 @@ public:
PYBIND11_TYPE_CASTER(T, const_name("os.PathLike")); PYBIND11_TYPE_CASTER(T, const_name("os.PathLike"));
}; };
#endif // PYBIND11_HAS_FILESYSTEM || defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM)
#if defined(PYBIND11_HAS_FILESYSTEM)
template <> template <>
struct type_caster<std::filesystem::path> : public path_caster<std::filesystem::path> {}; struct type_caster<std::filesystem::path> : public path_caster<std::filesystem::path> {};
#endif // PYBIND11_HAS_FILESYSTEM #elif defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM)
template <>
struct type_caster<std::experimental::filesystem::path>
: public path_caster<std::experimental::filesystem::path> {};
#endif
PYBIND11_NAMESPACE_END(detail) PYBIND11_NAMESPACE_END(detail)
PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE) PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)