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Fix bug in Sseq constraints found by Seth Cantrell 

llvm-svn: 129285
This commit is contained in:
Howard Hinnant 2011-04-11 18:22:12 +00:00
parent 9377a52c12
commit a23551cad4
3 changed files with 24 additions and 14 deletions
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34
libcxx/include/random
View File

@ -1650,6 +1650,16 @@ class piecewise_linear_distribution
_LIBCPP_BEGIN_NAMESPACE_STD
// __is_seed_sequence
template <class _Sseq, class _Engine>
struct __is_seed_sequence
{
static const bool value =
!is_convertible<_Sseq, typename _Engine::result_type>::value &&
!is_same<typename remove_cv<_Sseq>::type, _Engine>::value;
};
// linear_congruential_engine
template <unsigned long long __a, unsigned long long __c,
@ -1848,7 +1858,7 @@ public:
{seed(__s);}
template<class _Sseq> explicit linear_congruential_engine(_Sseq& __q,
_LIBCPP_INLINE_VISIBILITY
typename enable_if<!is_convertible<_Sseq, result_type>::value>::type* = 0)
typename enable_if<__is_seed_sequence<_Sseq, linear_congruential_engine>::value>::type* = 0)
{seed(__q);}
_LIBCPP_INLINE_VISIBILITY
void seed(result_type __s = default_seed)
@ -1858,7 +1868,7 @@ public:
_LIBCPP_INLINE_VISIBILITY
typename enable_if
<
!is_convertible<_Sseq, result_type>::value,
__is_seed_sequence<_Sseq, linear_congruential_engine>::value,
void
>::type
seed(_Sseq& __q)
@ -2104,14 +2114,14 @@ public:
{seed(__sd);}
template<class _Sseq> explicit mersenne_twister_engine(_Sseq& __q,
_LIBCPP_INLINE_VISIBILITY
typename enable_if<!is_convertible<_Sseq, result_type>::value>::type* = 0)
typename enable_if<__is_seed_sequence<_Sseq, mersenne_twister_engine>::value>::type* = 0)
{seed(__q);}
void seed(result_type __sd = default_seed);
template<class _Sseq>
_LIBCPP_INLINE_VISIBILITY
typename enable_if
<
!is_convertible<_Sseq, result_type>::value,
__is_seed_sequence<_Sseq, mersenne_twister_engine>::value,
void
>::type
seed(_Sseq& __q)
@ -2473,7 +2483,7 @@ public:
{seed(__sd);}
template<class _Sseq> explicit subtract_with_carry_engine(_Sseq& __q,
_LIBCPP_INLINE_VISIBILITY
typename enable_if<!is_convertible<_Sseq, result_type>::value>::type* = 0)
typename enable_if<__is_seed_sequence<_Sseq, subtract_with_carry_engine>::value>::type* = 0)
{seed(__q);}
_LIBCPP_INLINE_VISIBILITY
void seed(result_type __sd = default_seed)
@ -2482,7 +2492,7 @@ public:
_LIBCPP_INLINE_VISIBILITY
typename enable_if
<
!is_convertible<_Sseq, result_type>::value,
__is_seed_sequence<_Sseq, subtract_with_carry_engine>::value,
void
>::type
seed(_Sseq& __q)
@ -2741,7 +2751,7 @@ public:
template<class _Sseq>
_LIBCPP_INLINE_VISIBILITY
explicit discard_block_engine(_Sseq& __q,
typename enable_if<!is_convertible<_Sseq, result_type>::value &&
typename enable_if<__is_seed_sequence<_Sseq, discard_block_engine>::value &&
!is_convertible<_Sseq, _Engine>::value>::type* = 0)
: __e_(__q), __n_(0) {}
_LIBCPP_INLINE_VISIBILITY
@ -2752,7 +2762,7 @@ public:
_LIBCPP_INLINE_VISIBILITY
typename enable_if
<
!is_convertible<_Sseq, result_type>::value,
__is_seed_sequence<_Sseq, discard_block_engine>::value,
void
>::type
seed(_Sseq& __q) {__e_.seed(__q); __n_ = 0;}
@ -2940,7 +2950,7 @@ public:
explicit independent_bits_engine(result_type __sd) : __e_(__sd) {}
template<class _Sseq> explicit independent_bits_engine(_Sseq& __q,
_LIBCPP_INLINE_VISIBILITY
typename enable_if<!is_convertible<_Sseq, result_type>::value &&
typename enable_if<__is_seed_sequence<_Sseq, independent_bits_engine>::value &&
!is_convertible<_Sseq, _Engine>::value>::type* = 0)
: __e_(__q) {}
_LIBCPP_INLINE_VISIBILITY
@ -2951,7 +2961,7 @@ public:
_LIBCPP_INLINE_VISIBILITY
typename enable_if
<
!is_convertible<_Sseq, result_type>::value,
__is_seed_sequence<_Sseq, independent_bits_engine>::value,
void
>::type
seed(_Sseq& __q) {__e_.seed(__q);}
@ -3163,7 +3173,7 @@ public:
explicit shuffle_order_engine(result_type __sd) : __e_(__sd) {__init();}
template<class _Sseq> explicit shuffle_order_engine(_Sseq& __q,
_LIBCPP_INLINE_VISIBILITY
typename enable_if<!is_convertible<_Sseq, result_type>::value &&
typename enable_if<__is_seed_sequence<_Sseq, shuffle_order_engine>::value &&
!is_convertible<_Sseq, _Engine>::value>::type* = 0)
: __e_(__q) {__init();}
_LIBCPP_INLINE_VISIBILITY
@ -3174,7 +3184,7 @@ public:
_LIBCPP_INLINE_VISIBILITY
typename enable_if
<
!is_convertible<_Sseq, result_type>::value,
__is_seed_sequence<_Sseq, shuffle_order_engine>::value,
void
>::type
seed(_Sseq& __q) {__e_.seed(__q); __init();}

2
libcxx/test/numerics/rand/rand.eng/rand.eng.mers/copy.pass.cpp
View File

@ -40,7 +40,7 @@ test2()
typedef std::mt19937_64 E;
E e1;
e1();
E e2 = e1;
E e2(e1);
assert(e1 == e2);
assert(e1() == e2());
E::result_type k = e1();

2
libcxx/test/numerics/rand/rand.eng/rand.eng.sub/copy.pass.cpp
View File

@ -38,7 +38,7 @@ test2()
typedef std::ranlux48_base E;
E e1;
e1();
E e2 = e1;
E e2(e1);
assert(e1 == e2);
assert(e1() == e2());
E::result_type k = e1();