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Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well.

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There are actually two debug modes:

   1.  -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1
       This is a relatively expensive debug mode, but very thorough.  This is normally what you want to debug with, but may turn O(1) operations into O(N) operations.

   2.  -D_LIBCPP_DEBUG2=0
       This is "debug lite."  Only preconditions that can be checked with O(1) expense are checked.  For example range checking on an indexing operation.  But not iterator validity.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@187369 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant
2013-07-29 19:05:47 +00:00
parent d5bfe9030f
commit 0bb0a7c9ea
26 changed files with 779 additions and 3 deletions
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37
include/__hash_table
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@@ -953,7 +953,11 @@ public:
template <class _Key>
_LIBCPP_INLINE_VISIBILITY
size_type bucket(const _Key& __k) const
{return __constrain_hash(hash_function()(__k), bucket_count());}
{
_LIBCPP_ASSERT(bucket_count() > 0,
"unordered container::bucket(key) called when bucket_count() == 0");
return __constrain_hash(hash_function()(__k), bucket_count());
}
template <class _Key>
iterator find(const _Key& __x);
@@ -1009,12 +1013,18 @@ public:
return __bc != 0 ? (float)size() / __bc : 0.f;
}
_LIBCPP_INLINE_VISIBILITY void max_load_factor(float __mlf) _NOEXCEPT
{max_load_factor() = _VSTD::max(__mlf, load_factor());}
{
_LIBCPP_ASSERT(__mlf > 0,
"unordered container::max_load_factor(lf) called with lf <= 0");
max_load_factor() = _VSTD::max(__mlf, load_factor());
}
_LIBCPP_INLINE_VISIBILITY
local_iterator
begin(size_type __n)
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::begin(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return local_iterator(__bucket_list_[__n], __n, bucket_count(), this);
#else
@@ -1026,6 +1036,8 @@ public:
local_iterator
end(size_type __n)
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::end(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return local_iterator(nullptr, __n, bucket_count(), this);
#else
@@ -1037,6 +1049,8 @@ public:
const_local_iterator
cbegin(size_type __n) const
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::cbegin(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_local_iterator(__bucket_list_[__n], __n, bucket_count(), this);
#else
@@ -1048,6 +1062,8 @@ public:
const_local_iterator
cend(size_type __n) const
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::cend(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_local_iterator(nullptr, __n, bucket_count(), this);
#else
@@ -1830,6 +1846,11 @@ typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_hint_multi(
const_iterator __p, _Args&&... __args)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::emplace_hint(const_iterator, args...) called with an iterator not"
" referring to this unordered container");
#endif
__node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
@@ -1871,6 +1892,11 @@ typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(const_iterator __p,
_Pp&& __x)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::insert(const_iterator, rvalue) called with an iterator not"
" referring to this unordered container");
#endif
__node_holder __h = __construct_node(_VSTD::forward<_Pp>(__x));
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
@@ -1894,6 +1920,11 @@ typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(const_iterator __p,
const value_type& __x)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::insert(const_iterator, lvalue) called with an iterator not"
" referring to this unordered container");
#endif
__node_holder __h = __construct_node(__x);
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
@@ -2364,6 +2395,8 @@ template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::bucket_size(size_type __n) const
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::bucket_size(n) called with n >= bucket_count()");
__node_const_pointer __np = __bucket_list_[__n];
size_type __bc = bucket_count();
size_type __r = 0;