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Member fun value() that throws on uninitialized

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This commit is contained in:
Andrzej Krzemienski
2014-05-22 23:32:49 +02:00
parent 5e59e10f93
commit 75271b73a8
11 changed files with 226 additions and 6 deletions
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18
include/boost/optional/optional.hpp
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@ -23,7 +23,9 @@
#include <boost/config.hpp>
#include <boost/assert.hpp>
#include <boost/bad_optional_access.hpp>
#include <boost/static_assert.hpp>
#include <boost/throw_exception.hpp>
#include <boost/type.hpp>
#include <boost/type_traits/alignment_of.hpp>
#include <boost/type_traits/has_nothrow_constructor.hpp>
@ -935,6 +937,22 @@ class optional : public optional_detail::optional_base<T>
// No-throw
reference_const_type operator *() const { return this->get() ; }
reference_type operator *() { return this->get() ; }
reference_const_type value() const
{
if (this->is_initialized())
return this->get() ;
else
throw_exception(bad_optional_access("Attempted to access the value of an uninitialized optional object."));
}
reference_type value()
{
if (this->is_initialized())
return this->get() ;
else
throw_exception(bad_optional_access("Attempted to access the value of an uninitialized optional object."));
}
bool operator!() const BOOST_NOEXCEPT { return !this->is_initialized() ; }