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Add C++11 initializer list support for make_shared and allocate_shared array forms.

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[SVN r81257]
This commit is contained in:
Glen Fernandes
2012-11-09 06:17:05 +00:00
parent aa7562c3e5
commit 3d50db11b9
6 changed files with 102 additions and 0 deletions
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22
include/boost/smart_ptr/allocate_shared_array.hpp
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@@ -52,6 +52,28 @@ namespace boost {
return shared_ptr<T>(s1, p1); return shared_ptr<T>(s1, p1);
} }
#endif #endif
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
template<typename T, typename A>
inline typename detail::sp_if_array<T>::type
allocate_shared(const A& allocator, size_t size, typename detail::array_list<T>::type list) {
typedef typename shared_ptr<T>::element_type T1;
typedef typename detail::array_type<T1>::type T2;
typedef const T1* L1;
typedef const T2* L2;
T1* p1 = 0;
T2* p2 = 0;
L1 l1 = list.begin();
size_t n1 = size * detail::array_size<T1>::size;
detail::allocate_array_helper<A, T2> a1(allocator, n1, &p2);
detail::array_deleter<T2> d1;
shared_ptr<T> s1(p1, d1, a1);
detail::array_deleter<T2>* d2;
p1 = reinterpret_cast<T1*>(p2);
d2 = get_deleter<detail::array_deleter<T2> >(s1);
d2->construct(p2, n1, L2(l1));
return shared_ptr<T>(s1, p1);
}
#endif
} }
#endif #endif

8
include/boost/smart_ptr/detail/array_deleter.hpp
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@@ -37,6 +37,14 @@ namespace boost {
::new(p1) T(args...); ::new(p1) T(args...);
} }
} }
#endif
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
void construct(T* memory, std::size_t count, const T* list) {
for (object = memory; size < count; size++) {
void* p1 = object + size;
::new(p1) T(list[size]);
}
}
#endif #endif
void construct_noinit(T* memory, std::size_t count) { void construct_noinit(T* memory, std::size_t count) {
for (object = memory; size < count; size++) { for (object = memory; size < count; size++) {

18
include/boost/smart_ptr/detail/array_traits.hpp
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@@ -10,6 +10,9 @@
#define BOOST_SMART_PTR_DETAIL_ARRAY_TRAITS_HPP #define BOOST_SMART_PTR_DETAIL_ARRAY_TRAITS_HPP
#include <boost/type_traits/remove_cv.hpp> #include <boost/type_traits/remove_cv.hpp>
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
#include <initializer_list>
#endif
namespace boost { namespace boost {
namespace detail { namespace detail {
@@ -17,22 +20,37 @@ namespace boost {
struct array_type { struct array_type {
typedef typename boost::remove_cv<T>::type type; typedef typename boost::remove_cv<T>::type type;
}; };
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template<typename T, size_t N> template<typename T, size_t N>
struct array_type<T[N]> { struct array_type<T[N]> {
typedef typename array_type<T>::type type; typedef typename array_type<T>::type type;
}; };
#endif
template<typename T> template<typename T>
struct array_size { struct array_size {
enum { enum {
size = 1 size = 1
}; };
}; };
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template<typename T, size_t N> template<typename T, size_t N>
struct array_size<T[N]> { struct array_size<T[N]> {
enum { enum {
size = N * array_size<T>::size size = N * array_size<T>::size
}; };
}; };
#endif
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
template<typename T>
struct array_list {
};
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template<typename T>
struct array_list<T[]> {
typedef std::initializer_list<T> type;
};
#endif
#endif
} }
} }

22
include/boost/smart_ptr/make_shared_array.hpp
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@@ -51,6 +51,28 @@ namespace boost {
d2->construct(p2, n1, std::forward<Args>(args)...); d2->construct(p2, n1, std::forward<Args>(args)...);
return shared_ptr<T>(s1, p1); return shared_ptr<T>(s1, p1);
} }
#endif
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
template<typename T>
inline typename detail::sp_if_array<T>::type
make_shared(std::size_t size, typename detail::array_list<T>::type list) {
typedef typename shared_ptr<T>::element_type T1;
typedef typename detail::array_type<T1>::type T2;
typedef const T1* L1;
typedef const T2* L2;
T1* p1 = 0;
T2* p2 = 0;
L1 l1 = list.begin();
size_t n1 = size * detail::array_size<T1>::size;
detail::make_array_helper<T2> a1(n1, &p2);
detail::array_deleter<T2> d1;
shared_ptr<T> s1(p1, d1, a1);
detail::array_deleter<T2>* d2;
p1 = reinterpret_cast<T1*>(p2);
d2 = get_deleter<detail::array_deleter<T2> >(s1);
d2->construct(p2, n1, L2(l1));
return shared_ptr<T>(s1, p1);
}
#endif #endif
template<typename T> template<typename T>
inline typename detail::sp_if_array<T>::type inline typename detail::sp_if_array<T>::type

16
test/allocate_shared_array_create_test.cpp
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@@ -73,6 +73,22 @@ int main() {
BOOST_TEST(a1[0][1][0][0].f == 0); BOOST_TEST(a1[0][1][0][0].f == 0);
BOOST_TEST(a1[1][0][0][0].i == 0); BOOST_TEST(a1[1][0][0][0].i == 0);
} }
#endif
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
{
boost::shared_ptr<int[]> a1 = boost::allocate_shared<int[]>(std::allocator<int>(), 4, { 0, 1, 2, 3 });
BOOST_TEST(a1[0] == 0);
BOOST_TEST(a1[1] == 1);
BOOST_TEST(a1[2] == 2);
BOOST_TEST(a1[3] == 3);
}
{
boost::shared_ptr<int[][2]> a1 = boost::allocate_shared<int[][2]>(std::allocator<int>(), 2, { {0, 1}, {2, 3} });
BOOST_TEST(a1[0][0] == 0);
BOOST_TEST(a1[0][1] == 1);
BOOST_TEST(a1[1][0] == 2);
BOOST_TEST(a1[1][1] == 3);
}
#endif #endif
return boost::report_errors(); return boost::report_errors();
} }

16
test/make_shared_array_create_test.cpp
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@@ -73,6 +73,22 @@ int main() {
BOOST_TEST(a1[0][1][0][0].f == 0); BOOST_TEST(a1[0][1][0][0].f == 0);
BOOST_TEST(a1[1][0][0][0].i == 0); BOOST_TEST(a1[1][0][0][0].i == 0);
} }
#endif
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
{
boost::shared_ptr<int[]> a1 = boost::make_shared<int[]>(4, { 0, 1, 2, 3 });
BOOST_TEST(a1[0] == 0);
BOOST_TEST(a1[1] == 1);
BOOST_TEST(a1[2] == 2);
BOOST_TEST(a1[3] == 3);
}
{
boost::shared_ptr<int[][2]> a1 = boost::make_shared<int[][2]>(2, { {0, 1}, {2, 3} });
BOOST_TEST(a1[0][0] == 0);
BOOST_TEST(a1[0][1] == 1);
BOOST_TEST(a1[1][0] == 2);
BOOST_TEST(a1[1][1] == 3);
}
#endif #endif
return boost::report_errors(); return boost::report_errors();
} }