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Author SHA1 Message Date
Dave Abrahams
68d7ce1c53 Branch for developing Bitten client/server testing
[SVN r41004]
2007-11-10 22:53:12 +00:00
Niels Dekker
42e0001370 Added value_initialized<T> test, having T as aggregate POD struct. In the past, this would have triggered MSVC warning C4345; this warning is now disabled within value_init.hpp, changeset [40088]
[SVN r40089]
2007-10-16 17:06:39 +00:00
Niels Dekker
cd8f85afee Disabled MSVC warning C4345, in response to Gennadiy Rozental, Boost Developer mailing list, "[utility] value_init warning", October 14, 2007. Push'n'pop reminder from Paul A Bristow taken into account.
[SVN r40088]
2007-10-16 17:00:28 +00:00
Markus Schöpflin
bddd52c4b9 Fixed bug preventing compilation on Tru64/CXX.
[SVN r39918]
2007-10-11 07:36:41 +00:00
Niels Dekker
8f03aeac4e Added unit test to make sure that Visual C++ 7.1 ICE reported by Ralf W. Grosse-Kunstleve (Boost Developers mailing list, subject "utility/value_init.hpp: VC 7.1 ICE & workaround") will not occur anymore.
[SVN r39309]
2007-09-16 09:48:28 +00:00
Niels Dekker
3bb2568fad Visual C++ 7.1 ICE workaround by Ralf W. Grosse-Kunstleve added to ~const_T_base() as well. See also Boost Developers mailing list, subject "utility/value_init.hpp: VC 7.1 ICE & workaround"
[SVN r39308]
2007-09-16 09:33:34 +00:00
Ralf W. Grosse-Kunstleve
01e91a3799 work around Visual C++ 7.1 internal compiler error
[SVN r39302]
2007-09-15 23:11:50 +00:00
Niels Dekker
55f3c351a3 Added MSVC workaround to value_initialized, as described by ticket #1217, proposed at the Boost Developers mailing list, and discussed with Fernando Cacciola.
[SVN r39157]
2007-09-07 17:17:09 +00:00
3 changed files with 126 additions and 6 deletions

View File

@@ -54,8 +54,8 @@ public:
void* apply (void* address, std::size_t n) const
{
for(char* next = address = this->apply(address); !! --n;)
this->apply(next = next+sizeof(T));
for(void* next = address = this->apply(address); !! --n;)
this->apply(next = static_cast<char *>(next) + sizeof(T));
return address;
}

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@@ -1,10 +1,11 @@
// (C) 2002, Fernando Luis Cacciola Carballal.
// (C) Copyright 2002-2007, Fernando Luis Cacciola Carballal.
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// 21 Ago 2002 (Created) Fernando Cacciola
// 07 Set 2007 (Worked around MSVC++ bug) Fernando Cacciola, Niels Dekker
//
#ifndef BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP
#define BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP
@@ -13,6 +14,98 @@
#include <boost/type_traits/cv_traits.hpp>
#include <boost/detail/workaround.hpp>
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500) )
// Microsoft Visual C++ does not correctly support value initialization, as reported by
// Pavel Kuznetsov (MetaCommunications Engineering), 7/28/2005, Feedback ID 100744,
// Feedback Title: Value-initialization in new-expression
// https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=100744
// The report was closed at 11/14/2006, and its status was set to "Closed (Won't Fix)".
// Luckily, even in the presence of this compiler bug, boost::value_initialized will still
// do its job correctly, when using the following workaround:
#define BOOST_UTILITY_VALUE_INIT_WORKAROUND
#endif
#ifdef BOOST_UTILITY_VALUE_INIT_WORKAROUND
#include <boost/aligned_storage.hpp>
#include <boost/type_traits/alignment_of.hpp>
#include <cstring>
#include <new>
#ifdef BOOST_MSVC
#pragma warning(push)
#if _MSC_VER >= 1310
// When using MSVC 7.1 or higher, placement new, "new (&x) T()", may trigger warning C4345:
// "behavior change: an object of POD type constructed with an initializer of the form ()
// will be default-initialized". There is no need to worry about this, though.
#pragma warning(disable: 4345)
#endif
#endif
namespace boost {
namespace vinit_detail {
template<class T>
class const_T_base
{
protected :
const_T_base()
{
std::memset(&x, 0, sizeof(x));
new (&x) T();
}
~const_T_base()
{
void const * ptr = &x;
static_cast<T*>(ptr)->T::~T();
}
T & get() const
{
void const * ptr = &x;
return *static_cast<T*>(ptr);
}
private :
typename ::boost::aligned_storage<sizeof(T), ::boost::alignment_of<T>::value>::type x;
} ;
template<class T>
class non_const_T_base
{
protected :
non_const_T_base()
{
std::memset(&x, 0, sizeof(x));
new (&x) T();
}
~non_const_T_base()
{
void * ptr = &x;
static_cast<T*>(ptr)->T::~T();
}
T & get() const
{
void * ptr = &x;
return *static_cast<T*>(ptr);
}
private :
mutable typename ::boost::aligned_storage<sizeof(T), ::boost::alignment_of<T>::value>::type x;
} ;
#ifdef BOOST_MSVC
// Restores the state of warning C4345.
#pragma warning(pop)
#endif
#else
namespace boost {
namespace vinit_detail {
@@ -23,20 +116,26 @@ class const_T_base
protected :
const_T_base() : x() {}
T & get() const { return x; }
private :
T x ;
} ;
template<class T>
struct non_const_T_base
class non_const_T_base
{
protected :
non_const_T_base() : x() {}
T & get() const { return x; }
private :
mutable T x ;
} ;
#endif
template<class T>
struct select_base
{
@@ -57,9 +156,9 @@ class value_initialized : private vinit_detail::select_base<T>::type
value_initialized() {}
operator T&() const { return this->x ; }
operator T&() const { return this->get(); }
T& data() const { return this->x ; }
T& data() const { return this->get(); }
} ;

View File

@@ -60,6 +60,20 @@ struct NonPOD : NonPODBase
std::string id ;
} ;
//
// Sample aggregate POD struct type
//
struct AggregatePODStruct
{
float f;
char c;
int i;
};
bool operator == ( AggregatePODStruct const& lhs, AggregatePODStruct const& rhs )
{ return lhs.f == rhs.f && lhs.c == rhs.c && lhs.i == rhs.i ; }
template<class T>
void test ( T const& y, T const& z )
{
@@ -95,6 +109,13 @@ int test_main(int, char **)
test( POD(0,0,0.0), POD('a',1234,56.78) ) ;
test( NonPOD( std::string() ), NonPOD( std::string("something") ) ) ;
NonPOD NonPOD_object( std::string("NonPOD_object") );
test<NonPOD *>( 0, &NonPOD_object ) ;
AggregatePODStruct zeroInitializedAggregatePODStruct = { 0.0f, '\0', 0 };
AggregatePODStruct nonZeroInitializedAggregatePODStruct = { 1.25f, 'a', -1 };
test(zeroInitializedAggregatePODStruct, nonZeroInitializedAggregatePODStruct);
return 0;
}