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Make arg_t hold a pointer instead of a copy of the value

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This commit is contained in:
Dean Moldovan 2016-08-28 14:32:48 +02:00
parent 6f017cf658
commit 317524ffad
2 changed files with 5 additions and 9 deletions
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13
include/pybind11/attr.h
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@ -14,18 +14,12 @@
NAMESPACE_BEGIN(pybind11)
template <typename T> struct arg_t;
/// Annotation for keyword arguments
struct arg {
constexpr explicit arg(const char *name) : name(name) { }
template <typename T>
constexpr arg_t<T> operator=(const T &value) const { return {name, value}; }
template <typename T, size_t N>
constexpr arg_t<const T *> operator=(T const (&value)[N]) const {
return operator=((const T *) value);
}
const char *name;
};
@ -33,8 +27,9 @@ struct arg {
/// Annotation for keyword arguments with default values
template <typename T> struct arg_t : public arg {
constexpr arg_t(const char *name, const T &value, const char *descr = nullptr)
: arg(name), value(value), descr(descr) { }
T value;
: arg(name), value(&value), descr(descr) { }
const T *value;
const char *descr;
};
@ -246,7 +241,7 @@ struct process_attribute<arg_t<T>> : process_attribute_default<arg_t<T>> {
/* Convert keyword value into a Python object */
object o = object(detail::type_caster<typename detail::intrinsic_type<T>::type>::cast(
a.value, return_value_policy::automatic, handle()), false);
*a.value, return_value_policy::automatic, handle()), false);
if (!o) {
#if !defined(NDEBUG)

1
include/pybind11/pytypes.h
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@ -17,6 +17,7 @@ NAMESPACE_BEGIN(pybind11)
/* A few forward declarations */
class object; class str; class object; class dict; class iterator;
struct arg; template <typename T> struct arg_t;
namespace detail { class accessor; class args_proxy; class kwargs_proxy; }
/// Holds a reference to a Python object (no reference counting)