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Implement format/numpy descriptors for enums

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This commit is contained in:
Ivan Smirnov 2016-10-20 12:28:08 +01:00
parent 35995856dd
commit fb74df50c9
1 changed files with 17 additions and 0 deletions
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17
include/pybind11/numpy.h
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@ -552,6 +552,14 @@ template <size_t N> struct format_descriptor<std::array<char, N>> {
static std::string format() { return std::to_string(N) + "s"; }
};
template <typename T>
struct format_descriptor<T, detail::enable_if_t<std::is_enum<T>::value>> {
static std::string format() {
return format_descriptor<
typename std::remove_cv<typename std::underlying_type<T>::type>::type>::format();
}
};
NAMESPACE_BEGIN(detail)
template <typename T> struct is_std_array : std::false_type { };
template <typename T, size_t N> struct is_std_array<std::array<T, N>> : std::true_type { };
@ -563,6 +571,7 @@ struct is_pod_struct {
!std::is_array<T>::value &&
!is_std_array<T>::value &&
!std::is_integral<T>::value &&
!std::is_enum<T>::value &&
!std::is_same<typename std::remove_cv<T>::type, float>::value &&
!std::is_same<typename std::remove_cv<T>::type, double>::value &&
!std::is_same<typename std::remove_cv<T>::type, bool>::value &&
@ -612,6 +621,14 @@ template <size_t N> struct npy_format_descriptor<char[N]> { DECL_CHAR_FMT };
template <size_t N> struct npy_format_descriptor<std::array<char, N>> { DECL_CHAR_FMT };
#undef DECL_CHAR_FMT
template<typename T> struct npy_format_descriptor<T, enable_if_t<std::is_enum<T>::value>> {
private:
using base_descr = npy_format_descriptor<typename std::underlying_type<T>::type>;
public:
static PYBIND11_DESCR name() { return base_descr::name(); }
static pybind11::dtype dtype() { return base_descr::dtype(); }
};
struct field_descriptor {
const char *name;
size_t offset;