From: Felipe Magno de Almeida (felipe.m.almeida_at_[hidden])
Date: 2007-10-03 09:28:46
I would like to propose a way that could avoid allocations and would
be customizable too.
A allocator could be aggregated inside the boost.exception hierarchy.
This class could be a template on the number of bytes it would have,
and it would do the SBO for allocators.
virtual /* all allocator interface */
template <std::size_t size>
struct allocator : allocator_base
boost::array<char, size> buffer_;
// all boilerpart to handle multiple sizes
Then it is possible to dynamic_cast<> to allocator_base, where all
allocations would take place.
That way the allocator would not be allocated in the heap and the user
could customize to a bigger size if it knows it will have to attach
more info to that throwing, or less if it believes to be wasting
space. It could have a partial specialization for 0 too to disable SBO
I guess objects should be default-constructed and swapped too, to avoid copying.
-- Felipe Magno de Almeida
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