Subject: [Boost-commit] svn:boost r67183 - in branches/release: boost/optional libs/optional/test
From: andrey.semashev_at_[hidden]
Date: 2010-12-12 06:34:14
Author: andysem
Date: 2010-12-12 06:34:12 EST (Sun, 12 Dec 2010)
New Revision: 67183
URL: http://svn.boost.org/trac/boost/changeset/67183
Log:
Merged changes from trunk. Fixes #3395. Also updates swap behavior: if default constructor has no-throw guarantee, swap will use it to provide no-throw guarantee itself. operator>> behavior changed slightly so that the stream is not accessed when unrecognized character sequence is detected. The stream is marked with failbit in such a case.
Text files modified:
branches/release/boost/optional/optional.hpp | 178 +++++++++++----
branches/release/boost/optional/optional_io.hpp | 32 ++
branches/release/libs/optional/test/optional_test.cpp | 433 ++++++++++++++++++++++++++++++++++++---
branches/release/libs/optional/test/optional_test_io.cpp | 9
4 files changed, 557 insertions(+), 95 deletions(-)
Modified: branches/release/boost/optional/optional.hpp
==============================================================================
--- branches/release/boost/optional/optional.hpp (original)
+++ branches/release/boost/optional/optional.hpp 2010-12-12 06:34:12 EST (Sun, 12 Dec 2010)
@@ -1,4 +1,4 @@
-// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@@ -9,16 +9,20 @@
// You are welcome to contact the author at:
// fernando_cacciola_at_[hidden]
//
+// Revisions:
+// 27 Apr 2008 (improved swap) Fernando Cacciola, Niels Dekker, Thorsten Ottosen
+//
#ifndef BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP
#define BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP
-#include<new>
-#include<algorithm>
+#include <new>
+#include <algorithm>
#include "boost/config.hpp"
#include "boost/assert.hpp"
#include "boost/type.hpp"
#include "boost/type_traits/alignment_of.hpp"
+#include "boost/type_traits/has_nothrow_constructor.hpp"
#include "boost/type_traits/type_with_alignment.hpp"
#include "boost/type_traits/remove_reference.hpp"
#include "boost/type_traits/is_reference.hpp"
@@ -27,7 +31,9 @@
#include "boost/mpl/not.hpp"
#include "boost/detail/reference_content.hpp"
#include "boost/none.hpp"
+#include "boost/utility/addressof.hpp"
#include "boost/utility/compare_pointees.hpp"
+#include "boost/utility/in_place_factory.hpp"
#include "boost/optional/optional_fwd.hpp"
@@ -76,6 +82,15 @@
#define BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION
#endif
+#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) > 302 \
+ && !defined(__INTEL_COMPILER)
+// GCC since 3.3 has may_alias attribute that helps to alleviate optimizer issues with
+// regard to violation of the strict aliasing rules. The optional< T > storage type is marked
+// with this attribute in order to let the compiler know that it will alias objects of type T
+// and silence compilation warnings.
+#define BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS
+#endif
+
// Daniel Wallin discovered that bind/apply.hpp badly interacts with the apply<>
// member template of a factory as used in the optional<> implementation.
// He proposed this simple fix which is to move the call to apply<> outside
@@ -105,7 +120,12 @@
class aligned_storage
{
// Borland ICEs if unnamed unions are used for this!
- union dummy_u
+ union
+ // This works around GCC warnings about breaking strict aliasing rules when casting storage address to T*
+#if defined(BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS)
+ __attribute__((may_alias))
+#endif
+ dummy_u
{
char data[ sizeof(T) ];
BOOST_DEDUCED_TYPENAME type_with_alignment<
@@ -114,8 +134,13 @@
public:
- void const* address() const { return &dummy_.data[0]; }
- void * address() { return &dummy_.data[0]; }
+#if defined(BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS)
+ void const* address() const { return &dummy_; }
+ void * address() { return &dummy_; }
+#else
+ void const* address() const { return dummy_.data; }
+ void * address() { return dummy_.data; }
+#endif
} ;
template<class T>
@@ -149,7 +174,7 @@
typedef
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
BOOST_DEDUCED_TYPENAME
-#endif
+#endif
::boost::detail::make_reference_content<T>::type internal_type ;
typedef aligned_storage<internal_type> storage_type ;
@@ -200,7 +225,7 @@
{
construct(val);
}
-
+
// Creates an optional<T> initialized with 'val' IFF cond is true, otherwise creates an uninitialzed optional<T>.
// Can throw if T::T(T const&) does
optional_base ( bool cond, argument_type val )
@@ -421,8 +446,22 @@
private :
// internal_type can be either T or reference_content<T>
+#if defined(BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS)
+ // This workaround is supposed to silence GCC warnings about broken strict aliasing rules
+ internal_type const* get_object() const
+ {
+ union { void const* ap_pvoid; internal_type const* as_ptype; } caster = { m_storage.address() };
+ return caster.as_ptype;
+ }
+ internal_type * get_object()
+ {
+ union { void* ap_pvoid; internal_type* as_ptype; } caster = { m_storage.address() };
+ return caster.as_ptype;
+ }
+#else
internal_type const* get_object() const { return static_cast<internal_type const*>(m_storage.address()); }
internal_type * get_object() { return static_cast<internal_type *> (m_storage.address()); }
+#endif
// reference_content<T> lacks an implicit conversion to T&, so the following is needed to obtain a proper reference.
reference_const_type dereference( internal_type const* p, is_not_reference_tag ) const { return *p ; }
@@ -513,12 +552,12 @@
// Depending on the above some T ctor is called.
// Can throw is the resolved T ctor throws.
template<class Expr>
- explicit optional ( Expr const& expr ) : base(expr,&expr) {}
+ explicit optional ( Expr const& expr ) : base(expr,boost::addressof(expr)) {}
#endif
// Creates a deep copy of another optional<T>
// Can throw if T::T(T const&) does
- optional ( optional const& rhs ) : base(rhs) {}
+ optional ( optional const& rhs ) : base( static_cast<base const&>(rhs) ) {}
// No-throw (assuming T::~T() doesn't)
~optional() {}
@@ -527,9 +566,9 @@
// Assigns from an expression. See corresponding constructor.
// Basic Guarantee: If the resolved T ctor throws, this is left UNINITIALIZED
template<class Expr>
- optional& operator= ( Expr expr )
+ optional& operator= ( Expr const& expr )
{
- this->assign_expr(expr,&expr);
+ this->assign_expr(expr,boost::addressof(expr));
return *this ;
}
#endif
@@ -552,7 +591,7 @@
// (NOTE: On BCB, this operator is not actually called and left is left UNMODIFIED in case of a throw)
optional& operator= ( optional const& rhs )
{
- this->assign( rhs ) ;
+ this->assign( static_cast<base const&>(rhs) ) ;
return *this ;
}
@@ -573,6 +612,14 @@
return *this ;
}
+ void swap( optional & arg )
+ {
+ // allow for Koenig lookup
+ using boost::swap ;
+ swap(*this, arg);
+ }
+
+
// Returns a reference to the value if this is initialized, otherwise,
// the behaviour is UNDEFINED
// No-throw
@@ -582,7 +629,7 @@
// Returns a copy of the value if this is initialized, 'v' otherwise
reference_const_type get_value_or ( reference_const_type v ) const { return this->is_initialized() ? get() : v ; }
reference_type get_value_or ( reference_type v ) { return this->is_initialized() ? get() : v ; }
-
+
// Returns a pointer to the value if this is initialized, otherwise,
// the behaviour is UNDEFINED
// No-throw
@@ -599,22 +646,22 @@
// No-throw
operator unspecified_bool_type() const { return this->safe_bool() ; }
- // This is provided for those compilers which don't like the conversion to bool
- // on some contexts.
- bool operator!() const { return !this->is_initialized() ; }
+ // This is provided for those compilers which don't like the conversion to bool
+ // on some contexts.
+ bool operator!() const { return !this->is_initialized() ; }
} ;
// Returns optional<T>(v)
-template<class T>
-inline
+template<class T>
+inline
optional<T> make_optional ( T const& v )
{
return optional<T>(v);
}
// Returns optional<T>(cond,v)
-template<class T>
-inline
+template<class T>
+inline
optional<T> make_optional ( bool cond, T const& v )
{
return optional<T>(cond,v);
@@ -880,44 +927,77 @@
#define BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE
#endif
-// optional's swap:
-// If both are initialized, calls swap(T&, T&). If this swap throws, both will remain initialized but their values are now unspecified.
-// If only one is initialized, calls U.reset(*I), THEN I.reset().
-// If U.reset(*I) throws, both are left UNCHANGED (U is kept uinitialized and I is never reset)
-// If both are uninitialized, do nothing (no-throw)
-template<class T>
-inline
-void optional_swap ( optional<T>& x, optional<T>& y )
-{
- if ( !x && !!y )
- {
- x.reset(*y);
- y.reset();
- }
- else if ( !!x && !y )
- {
- y.reset(*x);
- x.reset();
- }
- else if ( !!x && !!y )
+ template<bool use_default_constructor> struct swap_selector;
+
+ template<>
+ struct swap_selector<true>
{
-// GCC > 3.2 and all other compilers have the using declaration at function scope (FLC)
+ template<class T>
+ static void optional_swap ( optional<T>& x, optional<T>& y )
+ {
+ bool hasX = x;
+ bool hasY = y;
+
+ if ( !hasX && !hasY )
+ return;
+
+ if( !hasX )
+ x = boost::in_place();
+ else if ( !hasY )
+ y = boost::in_place();
+
+ // GCC > 3.2 and all other compilers have the using declaration at function scope (FLC)
#ifndef BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE
- // allow for Koenig lookup
- using std::swap ;
+ // allow for Koenig lookup
+ using std::swap ;
#endif
- swap(*x,*y);
- }
-}
+ swap(*x,*y);
+
+ if( !hasX )
+ y = boost::none ;
+ else if( !hasY )
+ x = boost::none ;
+ }
+ };
+
+ template<>
+ struct swap_selector<false>
+ {
+ template<class T>
+ static void optional_swap ( optional<T>& x, optional<T>& y )
+ {
+ if ( !x && !!y )
+ {
+ x = *y;
+ y = boost::none ;
+ }
+ else if ( !!x && !y )
+ {
+ y = *x ;
+ x = boost::none ;
+ }
+ else if ( !!x && !!y )
+ {
+ // GCC > 3.2 and all other compilers have the using declaration at function scope (FLC)
+ #ifndef BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE
+ // allow for Koenig lookup
+ using std::swap ;
+ #endif
+ swap(*x,*y);
+ }
+ }
+ };
} // namespace optional_detail
+template<class T>
+struct optional_swap_should_use_default_constructor : has_nothrow_default_constructor<T> {} ;
+
template<class T> inline void swap ( optional<T>& x, optional<T>& y )
{
- optional_detail::optional_swap(x,y);
+ optional_detail::swap_selector<optional_swap_should_use_default_constructor<T>::value>::optional_swap(x, y);
}
-
} // namespace boost
#endif
Modified: branches/release/boost/optional/optional_io.hpp
==============================================================================
--- branches/release/boost/optional/optional_io.hpp (original)
+++ branches/release/boost/optional/optional_io.hpp 2010-12-12 06:34:12 EST (Sun, 12 Dec 2010)
@@ -13,19 +13,20 @@
#define BOOST_OPTIONAL_OPTIONAL_IO_FLC_19NOV2002_HPP
#if defined __GNUC__
-# if (__GNUC__ == 2 && __GNUC_MINOR__ <= 97)
+# if (__GNUC__ == 2 && __GNUC_MINOR__ <= 97)
# define BOOST_OPTIONAL_NO_TEMPLATED_STREAMS
# endif
#endif // __GNUC__
#if defined BOOST_OPTIONAL_NO_TEMPLATED_STREAMS
# include <iostream>
-#else
+#else
# include <istream>
# include <ostream>
-#endif
-
+#endif
+#include <boost/none.hpp>
+#include <boost/assert.hpp>
#include "boost/optional/optional.hpp"
#include "boost/utility/value_init.hpp"
@@ -62,17 +63,30 @@
operator>>(std::basic_istream<CharType, CharTrait>& in, optional<T>& v)
#endif
{
- if ( in.good() )
+ if (in.good())
{
int d = in.get();
- if ( d == ' ' )
+ if (d == ' ')
{
- T x ;
+ T x;
in >> x;
- v = x ;
+ v = x;
}
else
- v = optional<T>() ;
+ {
+ if (d == '-')
+ {
+ d = in.get();
+
+ if (d == '-')
+ {
+ v = none;
+ return in;
+ }
+ }
+
+ in.setstate( std::ios::failbit );
+ }
}
return in;
Modified: branches/release/libs/optional/test/optional_test.cpp
==============================================================================
--- branches/release/libs/optional/test/optional_test.cpp (original)
+++ branches/release/libs/optional/test/optional_test.cpp 2010-12-12 06:34:12 EST (Sun, 12 Dec 2010)
@@ -1,4 +1,4 @@
-// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@@ -9,6 +9,9 @@
// You are welcome to contact the author at:
// fernando_cacciola_at_[hidden]
//
+// Revisions:
+// 12 May 2008 (added more swap tests)
+//
#include<iostream>
#include<stdexcept>
#include<string>
@@ -16,6 +19,8 @@
#define BOOST_ENABLE_ASSERT_HANDLER
#include "boost/bind/apply.hpp" // Included just to test proper interaction with boost::apply<> as reported by Daniel Wallin
+#include "boost/mpl/bool.hpp"
+#include "boost/mpl/bool_fwd.hpp" // For mpl::true_ and mpl::false_
#include "boost/optional/optional.hpp"
@@ -153,27 +158,27 @@
ob.reset();
check_is_pending_dtor( ARG(T) ) ;
check_uninitialized(ob);
-
+
}
template<class T>
void test_conditional_ctor_and_get_valur_or ( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
-
+
T a(321);
-
+
T z(123);
-
+
optional<T> const cdef0(false,a);
-
+
optional<T> def0(false,a);
optional<T> def1 = boost::make_optional(false,a); // T is not within boost so ADL won't find make_optional unqualified
check_uninitialized(def0);
check_uninitialized(def1);
optional<T> const co0(true,a);
-
+
optional<T> o0(true,a);
optional<T> o1 = boost::make_optional(true,a); // T is not within boost so ADL won't find make_optional unqualified
@@ -181,65 +186,65 @@
check_initialized(o1);
check_value(o0,a,z);
check_value(o1,a,z);
-
+
T b = def0.get_value_or(z);
BOOST_CHECK( b == z ) ;
-
+
b = get_optional_value_or(def0,z);
BOOST_CHECK( b == z ) ;
-
+
b = o0.get_value_or(z);
BOOST_CHECK( b == a ) ;
b = get_optional_value_or(o0,z);
BOOST_CHECK( b == a ) ;
-
-
+
+
T const& crz = z ;
T& rz = z ;
-
+
T const& crzz = def0.get_value_or(crz);
BOOST_CHECK( crzz == crz ) ;
-
+
T& rzz = def0.get_value_or(rz);
BOOST_CHECK( rzz == rz ) ;
-
+
T const& crzzz = get_optional_value_or(cdef0,crz);
BOOST_CHECK( crzzz == crz ) ;
-
+
T& rzzz = get_optional_value_or(def0,rz);
BOOST_CHECK( rzzz == rz ) ;
-
+
T const& crb = o0.get_value_or(crz);
BOOST_CHECK( crb == a ) ;
-
+
T& rb = o0.get_value_or(rz);
BOOST_CHECK( rb == b ) ;
-
+
T const& crbb = get_optional_value_or(co0,crz);
BOOST_CHECK( crbb == b ) ;
-
+
T const& crbbb = get_optional_value_or(o0,crz);
BOOST_CHECK( crbbb == b ) ;
-
+
T& rbb = get_optional_value_or(o0,rz);
BOOST_CHECK( rbb == b ) ;
-
+
T& ra = a ;
-
+
optional<T&> defref(false,ra);
BOOST_CHECK(!defref);
-
+
optional<T&> ref(true,ra);
BOOST_CHECK(!!ref);
-
+
a = T(432);
-
+
BOOST_CHECK( *ref == a ) ;
-
+
T& r1 = defref.get_value_or(z);
BOOST_CHECK( r1 == z ) ;
-
+
T& r2 = ref.get_value_or(z);
BOOST_CHECK( r2 == a ) ;
}
@@ -713,7 +718,7 @@
optional<T> opt0(v0);
optional<T> opt1(v1);
optional<T> opt2(v2);
-
+
// Check identity
BOOST_CHECK ( def0 == def0 ) ;
BOOST_CHECK ( opt0 == opt0 ) ;
@@ -751,7 +756,7 @@
BOOST_CHECK ( opt1 > opt0 ) ;
BOOST_CHECK ( opt1 <= opt2 ) ;
BOOST_CHECK ( opt1 >= opt0 ) ;
-
+
// Compare against a value directly
BOOST_CHECK ( opt0 == v0 ) ;
BOOST_CHECK ( opt0 != v1 ) ;
@@ -794,7 +799,7 @@
BOOST_CHECK ( def0 == none ) ;
BOOST_CHECK ( non_def != none ) ;
BOOST_CHECK ( !def1 ) ;
- BOOST_CHECK ( !(non_def < none) ) ;
+ BOOST_CHECK ( !(non_def < none) ) ;
BOOST_CHECK ( non_def > none ) ;
BOOST_CHECK ( !(non_def <= none) ) ;
BOOST_CHECK ( non_def >= none ) ;
@@ -814,11 +819,11 @@
optional<T> oa(a) ;
optional<T> const coa(a) ;
-
+
BOOST_CHECK ( coa->V() == 1234 ) ;
-
+
oa->V() = 4321 ;
-
+
BOOST_CHECK ( a.V() = 1234 ) ;
BOOST_CHECK ( (*oa).V() = 4321 ) ;
}
@@ -927,6 +932,364 @@
BOOST_CHECK(*get(&opt1) == static_cast<double>(f));
}
+
+namespace optional_swap_test
+{
+ class default_ctor_exception : public std::exception {} ;
+ class copy_ctor_exception : public std::exception {} ;
+ class assignment_exception : public std::exception {} ;
+
+ //
+ // Base class for swap test classes. Its assignment should not be called, when swapping
+ // optional<T> objects. (The default std::swap would do so.)
+ //
+ class base_class_with_forbidden_assignment
+ {
+ public:
+ base_class_with_forbidden_assignment & operator=(const base_class_with_forbidden_assignment &)
+ {
+ BOOST_CHECK(!"The assignment should not be used while swapping!");
+ throw assignment_exception();
+ }
+
+ virtual ~base_class_with_forbidden_assignment() {}
+ };
+
+ //
+ // Class without default constructor
+ //
+ class class_without_default_ctor : public base_class_with_forbidden_assignment
+ {
+ public:
+ char data;
+ explicit class_without_default_ctor(char arg) : data(arg) {}
+ };
+
+ //
+ // Class whose default constructor should not be used by optional::swap!
+ //
+ class class_whose_default_ctor_should_not_be_used : public base_class_with_forbidden_assignment
+ {
+ public:
+ char data;
+ explicit class_whose_default_ctor_should_not_be_used(char arg) : data(arg) {}
+
+ class_whose_default_ctor_should_not_be_used()
+ {
+ BOOST_CHECK(!"This default constructor should not be used while swapping!");
+ throw default_ctor_exception();
+ }
+ };
+
+ //
+ // Class whose default constructor should be used by optional::swap.
+ // Its copy constructor should be avoided!
+ //
+ class class_whose_default_ctor_should_be_used : public base_class_with_forbidden_assignment
+ {
+ public:
+ char data;
+ explicit class_whose_default_ctor_should_be_used(char arg) : data(arg) { }
+
+ class_whose_default_ctor_should_be_used() : data('\0') { }
+
+ class_whose_default_ctor_should_be_used(const class_whose_default_ctor_should_be_used &)
+ {
+ BOOST_CHECK(!"This copy constructor should not be used while swapping!");
+ throw copy_ctor_exception();
+ }
+ };
+
+ //
+ // Class template whose default constructor should be used by optional::swap.
+ // Its copy constructor should be avoided!
+ //
+ template <class T>
+ class template_whose_default_ctor_should_be_used : public base_class_with_forbidden_assignment
+ {
+ public:
+ T data;
+ explicit template_whose_default_ctor_should_be_used(T arg) : data(arg) { }
+
+ template_whose_default_ctor_should_be_used() : data('\0') { }
+
+ template_whose_default_ctor_should_be_used(const template_whose_default_ctor_should_be_used &)
+ {
+ BOOST_CHECK(!"This copy constructor should not be used while swapping!");
+ throw copy_ctor_exception();
+ }
+ };
+
+ //
+ // Class whose explicit constructor should be used by optional::swap.
+ // Its other constructors should be avoided!
+ //
+ class class_whose_explicit_ctor_should_be_used : public base_class_with_forbidden_assignment
+ {
+ public:
+ char data;
+ explicit class_whose_explicit_ctor_should_be_used(char arg) : data(arg) { }
+
+ class_whose_explicit_ctor_should_be_used()
+ {
+ BOOST_CHECK(!"This default constructor should not be used while swapping!");
+ throw default_ctor_exception();
+ }
+
+ class_whose_explicit_ctor_should_be_used(const class_whose_explicit_ctor_should_be_used &)
+ {
+ BOOST_CHECK(!"This copy constructor should not be used while swapping!");
+ throw copy_ctor_exception();
+ }
+ };
+
+ void swap(class_whose_default_ctor_should_not_be_used & lhs, class_whose_default_ctor_should_not_be_used & rhs)
+ {
+ std::swap(lhs.data, rhs.data);
+ }
+
+ void swap(class_whose_default_ctor_should_be_used & lhs, class_whose_default_ctor_should_be_used & rhs)
+ {
+ std::swap(lhs.data, rhs.data);
+ }
+
+ void swap(class_without_default_ctor & lhs, class_without_default_ctor & rhs)
+ {
+ std::swap(lhs.data, rhs.data);
+ }
+
+ void swap(class_whose_explicit_ctor_should_be_used & lhs, class_whose_explicit_ctor_should_be_used & rhs)
+ {
+ std::swap(lhs.data, rhs.data);
+ }
+
+ template <class T>
+ void swap(template_whose_default_ctor_should_be_used<T> & lhs, template_whose_default_ctor_should_be_used<T> & rhs)
+ {
+ std::swap(lhs.data, rhs.data);
+ }
+
+ //
+ // optional<T>::swap should be customized when neither the copy constructor
+ // nor the default constructor of T are supposed to be used when swapping, e.g.,
+ // for the following type T = class_whose_explicit_ctor_should_be_used.
+ //
+ void swap(boost::optional<class_whose_explicit_ctor_should_be_used> & x, boost::optional<class_whose_explicit_ctor_should_be_used> & y)
+ {
+ bool hasX = x;
+ bool hasY = y;
+
+ if ( !hasX && !hasY )
+ return;
+
+ if( !hasX )
+ x = boost::in_place('\0');
+ else if ( !hasY )
+ y = boost::in_place('\0');
+
+ optional_swap_test::swap(*x,*y);
+
+ if( !hasX )
+ y = boost::none ;
+ else if( !hasY )
+ x = boost::none ;
+ }
+
+
+} // End of namespace optional_swap_test.
+
+
+namespace boost {
+
+//
+// Compile time tweaking on whether or not swap should use the default constructor:
+//
+
+template <> struct optional_swap_should_use_default_constructor<
+ optional_swap_test::class_whose_default_ctor_should_be_used> : mpl::true_ {} ;
+
+template <> struct optional_swap_should_use_default_constructor<
+ optional_swap_test::class_whose_default_ctor_should_not_be_used> : mpl::false_ {} ;
+
+template <class T> struct optional_swap_should_use_default_constructor<
+ optional_swap_test::template_whose_default_ctor_should_be_used<T> > : mpl::true_ {} ;
+
+
+//
+// Specialization of boost::swap:
+//
+template <>
+void swap(optional<optional_swap_test::class_whose_explicit_ctor_should_be_used> & x, optional<optional_swap_test::class_whose_explicit_ctor_should_be_used> & y)
+{
+ optional_swap_test::swap(x, y);
+}
+
+} // namespace boost
+
+
+namespace std {
+
+//
+// Specializations of std::swap:
+//
+
+template <>
+void swap(optional_swap_test::class_whose_default_ctor_should_be_used & x, optional_swap_test::class_whose_default_ctor_should_be_used & y)
+{
+ optional_swap_test::swap(x, y);
+}
+
+template <>
+void swap(optional_swap_test::class_whose_default_ctor_should_not_be_used & x, optional_swap_test::class_whose_default_ctor_should_not_be_used & y)
+{
+ optional_swap_test::swap(x, y);
+}
+
+template <>
+void swap(optional_swap_test::class_without_default_ctor & x, optional_swap_test::class_without_default_ctor & y)
+{
+ optional_swap_test::swap(x, y);
+}
+
+template <>
+void swap(optional_swap_test::class_whose_explicit_ctor_should_be_used & x, optional_swap_test::class_whose_explicit_ctor_should_be_used & y)
+{
+ optional_swap_test::swap(x, y);
+}
+
+} // namespace std
+
+
+//
+// Tests whether the swap function works properly for optional<T>.
+// Assumes that T has one data member, of type char.
+// Returns true iff the test is passed.
+//
+template <class T>
+bool test_swap_function( T const* )
+{
+ const boost::unit_test::counter_t counter_before_test = boost::minimal_test::errors_counter();
+ try
+ {
+ optional<T> obj1;
+ optional<T> obj2('a');
+
+ // Self-swap should not have any effect.
+ swap(obj1, obj1);
+ swap(obj2, obj2);
+ BOOST_CHECK(!obj1);
+ BOOST_CHECK(!!obj2 && obj2->data == 'a');
+
+ // Call non-member swap.
+ swap(obj1, obj2);
+
+ // Test if obj1 and obj2 are really swapped.
+ BOOST_CHECK(!!obj1 && obj1->data == 'a');
+ BOOST_CHECK(!obj2);
+
+ // Call non-member swap one more time.
+ swap(obj1, obj2);
+
+ // Test if obj1 and obj2 are swapped back.
+ BOOST_CHECK(!obj1);
+ BOOST_CHECK(!!obj2 && obj2->data == 'a');
+ }
+ catch(const std::exception &)
+ {
+ // The swap function should not throw, for our test cases.
+ return false ;
+ }
+ return boost::minimal_test::errors_counter() == counter_before_test ;
+}
+
+//
+// Tests whether the optional<T>::swap member function works properly.
+// Assumes that T has one data member, of type char.
+// Returns true iff the test is passed.
+//
+template <class T>
+bool test_swap_member_function( T const* )
+{
+ const boost::unit_test::counter_t counter_before_test = boost::minimal_test::errors_counter();
+ try
+ {
+ optional<T> obj1;
+ optional<T> obj2('a');
+
+ // Self-swap should not have any effect.
+ obj1.swap(obj1);
+ obj2.swap(obj2);
+ BOOST_CHECK(!obj1);
+ BOOST_CHECK(!!obj2 && obj2->data == 'a');
+
+ // Call member swap.
+ obj1.swap(obj2);
+
+ // Test if obj1 and obj2 are really swapped.
+ BOOST_CHECK(!!obj1 && obj1->data == 'a');
+ BOOST_CHECK(!obj2);
+
+ // Call member swap one more time.
+ obj1.swap(obj2);
+
+ // Test if obj1 and obj2 are swapped back.
+ BOOST_CHECK(!obj1);
+ BOOST_CHECK(!!obj2 && obj2->data == 'a');
+ }
+ catch(const std::exception &)
+ {
+ // The optional<T>::swap member function should not throw, for our test cases.
+ return false ;
+ }
+ return boost::minimal_test::errors_counter() == counter_before_test ;
+}
+
+
+//
+// Tests compile time tweaking of swap, by means of
+// optional_swap_should_use_default_constructor.
+//
+void test_swap_tweaking()
+{
+ BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_without_default_ctor) ) );
+ BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_whose_default_ctor_should_be_used) ) );
+ BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_whose_default_ctor_should_not_be_used) ) );
+ BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_whose_explicit_ctor_should_be_used) ) );
+ BOOST_CHECK( test_swap_function( ARG(optional_swap_test::template_whose_default_ctor_should_be_used<char>) ) );
+ BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_without_default_ctor) ) );
+ BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_whose_default_ctor_should_be_used) ) );
+ BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_whose_default_ctor_should_not_be_used) ) );
+ BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_whose_explicit_ctor_should_be_used) ) );
+ BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::template_whose_default_ctor_should_be_used<char>) ) );
+}
+
+// Test for support for classes with overridden operator&
+class CustomAddressOfClass
+{
+ int n;
+
+public:
+ CustomAddressOfClass() : n(0) {}
+ CustomAddressOfClass(CustomAddressOfClass const& that) : n(that.n) {}
+ explicit CustomAddressOfClass(int m) : n(m) {}
+ int* operator& () { return &n; }
+ bool operator== (CustomAddressOfClass const& that) const { return n == that.n; }
+};
+
+void test_custom_addressof_operator()
+{
+ boost::optional< CustomAddressOfClass > o1(CustomAddressOfClass(10));
+ BOOST_CHECK(!!o1);
+ BOOST_CHECK(o1.get() == CustomAddressOfClass(10));
+
+ o1 = CustomAddressOfClass(20);
+ BOOST_CHECK(!!o1);
+ BOOST_CHECK(o1.get() == CustomAddressOfClass(20));
+
+ o1 = boost::none;
+ BOOST_CHECK(!o1);
+}
+
int test_main( int, char* [] )
{
try
@@ -936,6 +1299,8 @@
test_no_implicit_conversions();
test_conversions1();
test_conversions2();
+ test_swap_tweaking();
+ test_custom_addressof_operator();
}
catch ( ... )
{
Modified: branches/release/libs/optional/test/optional_test_io.cpp
==============================================================================
--- branches/release/libs/optional/test/optional_test_io.cpp (original)
+++ branches/release/libs/optional/test/optional_test_io.cpp 2010-12-12 06:34:12 EST (Sun, 12 Dec 2010)
@@ -55,10 +55,14 @@
{
stringstream s ;
- s << o ;
- s >> buff ;
+ const int markv = 123 ;
+ int mark = 0 ;
+
+ s << o << " " << markv ;
+ s >> buff >> mark ;
BOOST_ASSERT( buff == o ) ;
+ BOOST_ASSERT( mark == markv ) ;
}
@@ -77,7 +81,6 @@
{
test(1,2);
test(string("hello"),string("buffer"));
- test(string(""),string("buffer"));
}
catch ( ... )
{