From: nesotto_at_[hidden]
Date: 2008-07-18 10:18:57
Author: nesotto
Date: 2008-07-18 10:18:57 EDT (Fri, 18 Jul 2008)
New Revision: 47559
URL: http://svn.boost.org/trac/boost/changeset/47559
Log:
default constructor changed so it does not allocate memory (it allocated a huge memory block previously).
Text files modified:
branches/release/boost/circular_buffer/base.hpp | 17 +++++++++--------
1 files changed, 9 insertions(+), 8 deletions(-)
Modified: branches/release/boost/circular_buffer/base.hpp
==============================================================================
--- branches/release/boost/circular_buffer/base.hpp (original)
+++ branches/release/boost/circular_buffer/base.hpp 2008-07-18 10:18:57 EDT (Fri, 18 Jul 2008)
@@ -907,22 +907,23 @@
// Construction/Destruction
- //! Create an empty <code>circular_buffer</code> with a maximum capacity.
+ //! Create an empty <code>circular_buffer</code> with zero capacity.
/*!
- \post <code>capacity() == max_size() \&\& size() == 0</code>
+ \post <code>capacity() == 0 \&\& size() == 0</code>
\param alloc The allocator.
\throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
used).
\par Complexity
Constant.
- \warning This constructor has been defined only due to compatibility with the STL container definition. Avoid
- using it because it may allocate <b>very large</b> amount of memory (depending on allocator's
- %max_size()).
+ \warning Since Boost version 1.36 the behaviour of this constructor has changed. Now the constructor does not
+ allocate any memory and both capacity and size are set to zero. Also note when inserting an element
+ into a <code>circular_buffer</code> with zero capacity (e.g. by
+ <code>\link push_back() push_back(const_reference)\endlink</code> or
+ <code>\link insert(iterator, param_value_type) insert(iterator, value_type)\endlink</code>) nothing
+ will be inserted and the size (as well as capacity) remains zero.
*/
explicit circular_buffer(const allocator_type& alloc = allocator_type())
- : m_size(0), m_alloc(alloc) {
- initialize(max_size());
- }
+ : m_buff(0), m_end(0), m_first(0), m_last(0), m_size(0), m_alloc(alloc) {}
//! Create an empty <code>circular_buffer</code> with the specified capacity.
/*!