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[SVN r18045]
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nobody
2003-03-22 13:34:53 +00:00
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317
include/boost/optional.hpp
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// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#ifndef BOOST_OPTIONAL_FLC_19NOV2002_HPP
#define BOOST_OPTIONAL_FLC_19NOV2002_HPP
#include<new>
#include<algorithm>
#include "boost/config.hpp"
#include "boost/assert.hpp"
#include "boost/type_traits/alignment_of.hpp"
#include "boost/type_traits/type_with_alignment.hpp"
#if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
// VC6.0 has the following bug:
// When a templated assignment operator exist, an implicit conversion
// constructing an optional<T> is used when assigment of the form:
// optional<T> opt ; opt = T(...);
// is compiled.
// However, optional's ctor is _explicit_ and the assignemt shouldn't compile.
// Therefore, for VC6.0 templated assignment is disabled.
//
#define BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, == 1300)
// VC7.0 has the following bug:
// When both a non-template and a template copy-ctor exist
// and the templated version is made 'explicit', the explicit is also
// given to the non-templated version, making the class non-implicitely-copyable.
//
#define BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
#endif
namespace boost
{
namespace optional_detail
{
template <class T>
class aligned_storage
{
// Borland ICEs if unnamed unions are used for this!
union dummy_u
{
char data[ sizeof(T) ];
BOOST_DEDUCED_TYPENAME type_with_alignment<
::boost::alignment_of<T>::value >::type aligner_;
} dummy_ ;
public:
void const* address() const { return &dummy_.data[0]; }
void * address() { return &dummy_.data[0]; }
} ;
}
template<class T>
class optional
{
typedef optional<T> this_type ;
typedef optional_detail::aligned_storage<T> storage_type ;
typedef void (this_type::*unspecified_bool_type)();
public :
typedef T value_type ;
// Creates an optional<T> uninitialized.
// No-throw
optional ()
:
m_initialized(false) {}
// Creates an optional<T> initialized with 'val'.
// Can throw if T::T(T const&) does
explicit optional ( T const& val )
:
m_initialized(false)
{
construct(val);
}
#ifndef BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
// NOTE: MSVC needs templated versions first
// Creates a deep copy of another convertible optional<U>
// Requires a valid conversion from U to T.
// Can throw if T::T(U const&) does
template<class U>
explicit optional ( optional<U> const& rhs )
:
m_initialized(false)
{
if ( rhs )
construct(*rhs);
}
#endif
// Creates a deep copy of another optional<T>
// Can throw if T::T(T const&) does
optional ( optional const& rhs )
:
m_initialized(false)
{
if ( rhs )
construct(*rhs);
}
// No-throw (assuming T::~T() doesn't)
~optional() { destroy() ; }
#ifndef BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT
// Assigns from another convertible optional<U> (converts && deep-copies the rhs value)
// Requires a valid conversion from U to T.
// Basic Guarantee: If T::T( U const& ) throws, this is left UNINITIALIZED
template<class U>
optional& operator= ( optional<U> const& rhs )
{
destroy(); // no-throw
if ( rhs )
{
// An exception can be thrown here.
// It it happens, THIS will be left uninitialized.
construct(*rhs);
}
return *this ;
}
#endif
// Assigns from another optional<T> (deep-copies the rhs value)
// Basic Guarantee: If T::T( T const& ) throws, this is left UNINITIALIZED
optional& operator= ( optional const& rhs )
{
destroy(); // no-throw
if ( rhs )
{
// An exception can be thrown here.
// It it happens, THIS will be left uninitialized.
construct(*rhs);
}
return *this ;
}
// Destroys the current value, if any, leaving this UNINITIALIZED
// No-throw (assuming T::~T() doesn't)
void reset()
{
destroy();
}
// Replaces the current value -if any- with 'val'
// Basic Guarantee: If T::T( T const& ) throws this is left UNINITIALIZED.
void reset ( T const& val )
{
destroy();
construct(val);
}
// Returns a pointer to the value if this is initialized, otherwise,
// returns NULL.
// No-throw
T const* get() const { return m_initialized ? static_cast<T const*>(m_storage.address()) : 0 ; }
T* get() { return m_initialized ? static_cast<T*> (m_storage.address()) : 0 ; }
// Returns a pointer to the value if this is initialized, otherwise,
// the behaviour is UNDEFINED
// No-throw
T const* operator->() const { BOOST_ASSERT(m_initialized) ; return static_cast<T const*>(m_storage.address()) ; }
T* operator->() { BOOST_ASSERT(m_initialized) ; return static_cast<T*> (m_storage.address()) ; }
// Returns a reference to the value if this is initialized, otherwise,
// the behaviour is UNDEFINED
// No-throw
T const& operator *() const { BOOST_ASSERT(m_initialized) ; return *static_cast<T const*>(m_storage.address()) ; }
T& operator *() { BOOST_ASSERT(m_initialized) ; return *static_cast<T*> (m_storage.address()) ; }
// implicit conversion to "bool"
// No-throw
operator unspecified_bool_type() const { return m_initialized ? &this_type::destroy : 0 ; }
// This is provided for those compilers which don't like the conversion to bool
// on some contexts.
bool operator!() const { return !m_initialized ; }
private :
void construct ( T const& val )
{
new (m_storage.address()) T(val) ;
m_initialized = true ;
}
void destroy()
{
if ( m_initialized )
{
get()->~T() ;
m_initialized = false ;
}
}
bool m_initialized ;
storage_type m_storage ;
} ;
// Returns a pointer to the value if this is initialized, otherwise, returns NULL.
// No-throw
template<class T>
inline
T const* get_pointer ( optional<T> const& opt )
{
return opt.get() ;
}
template<class T>
inline
T* get_pointer ( optional<T>& opt )
{
return opt.get() ;
}
// template<class OP> bool equal_pointees(OP const& x, OP const& y);
//
// Being OP a model of OptionalPointee (either a pointer or an optional):
//
// If both x and y have valid pointees, returns the result of (*x == *y)
// If only one has a valid pointee, returns false.
// If none have valid pointees, returns true.
// No-throw
template<class OptionalPointee>
inline
bool equal_pointees ( OptionalPointee const& x, OptionalPointee const& y )
{
return (!x) != (!y) ? false : ( !x ? true : (*x) == (*y) ) ;
}
// optional's operator == and != have deep-semantics (compare values).
// WARNING: This is UNLIKE pointers. Use equal_pointees() in generic code instead.
template<class T>
inline
bool operator == ( optional<T> const& x, optional<T> const& y )
{ return equal_pointees(x,y); }
template<class T>
inline
bool operator != ( optional<T> const& x, optional<T> const& y )
{ return !( x == y ) ; }
//
// The following swap implementation follows the GCC workaround as found in
// "boost/detail/compressed_pair.hpp"
//
namespace optional_detail {
#ifdef __GNUC__
// workaround for GCC (JM):
using std::swap;
#endif
// optional's swap:
// If both are initialized, calls swap(T&, T&), with whatever exception guarantess are given there.
// If only one is initialized, calls I.reset() and U.reset(*I), with the Basic Guarantee
// 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); // Basic guarantee.
y.reset();
}
else if ( !!x && !y )
{
y.reset(*x); // Basic guarantee.
x.reset();
}
else if ( !!x && !!y )
{
#ifndef __GNUC__
using std::swap ;
#endif
swap(*x,*y);
}
}
} // namespace optional_detail
template<class T> inline void swap ( optional<T>& x, optional<T>& y )
{
optional_detail::optional_swap(x,y);
}
} // namespace boost
#endif

9
index.html
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<html>
<head>
<meta http-equiv="refresh" content="0; URL=doc/optional.html">
</head>
<body>
Automatic redirection failed, please go to
<a href="doc/optional.html">doc/optional.html</a>.
</body>
</html>

1
test/.cvsignore
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bin

37
test/Jamfile
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# Boost.Optional Library test Jamfile
#
# Copyright (C) 2003, Fernando Luis Cacciola Carballal.
#
# This material is provided "as is", with absolutely no warranty expressed
# or implied. Any use is at your own risk.
#
# Permission to use or copy this software for any purpose is hereby granted
# without fee, provided the above notices are retained on all copies.
# Permission to modify the code and to distribute modified code is granted,
# provided the above notices are retained, and a notice that the code was
# modified is included with the above copyright notice.
#
subproject libs/optional/test ;
# bring in rules for testing
SEARCH on testing.jam = $(BOOST_BUILD_PATH) ;
include testing.jam ;
# Make tests run by default.
DEPENDS all : test ;
{
# look in BOOST_ROOT for sources first, just in this Jamfile
local SEARCH_SOURCE = $(BOOST_ROOT) $(SEARCH_SOURCE) ;
test-suite optional :
[ run libs/optional/test/optional_test.cpp ]
[ compile-fail libs/optional/test/optional_test_fail1.cpp ]
[ compile-fail libs/optional/test/optional_test_fail2.cpp ]
[ compile-fail libs/optional/test/optional_test_fail3.cpp ]
[ compile-fail libs/optional/test/optional_test_fail4.cpp ]
[ compile-fail libs/optional/test/optional_test_fail5a.cpp ]
[ compile-fail libs/optional/test/optional_test_fail5b.cpp ]
;
}

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test/optional_test.cpp
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// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#include<iostream>
#include<stdexcept>
#include<string>
#define BOOST_ENABLE_ASSERT_HANDLER
#include "boost/optional.hpp"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "boost/test/minimal.hpp"
#ifdef ENABLE_TRACE
#define TRACE(msg) std::cout << msg << std::endl ;
#else
#define TRACE(msg)
#endif
namespace boost {
void assertion_failed (char const * expr, char const * func, char const * file, long )
{
using std::string ;
string msg = string("Boost assertion failure for \"")
+ string(expr)
+ string("\" at file \"")
+ string(file)
+ string("\" function \"")
+ string(func)
+ string("\"") ;
TRACE(msg);
throw std::logic_error(msg);
}
}
using boost::optional ;
template<class T> inline void unused_variable ( T const& ) {}
#ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
using boost::swap ;
using boost::get_pointer ;
#endif
// MSVC6.0 does not support comparisons of optional against a literal null pointer value (0)
// via the safe_bool operator.
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1300) ) // 1300 == VC++ 7.1
#define BOOST_OPTIONAL_NO_NULL_COMPARE
#endif
#define ARG(T) (static_cast< T const* >(0))
//
// Helper class used to verify the lifetime managment of the values held by optional
//
class X
{
public :
X ( int av ) : v(av)
{
++ count ;
TRACE ( "X::X(" << av << "). this=" << this ) ;
}
X ( X const& rhs ) : v(rhs.v)
{
pending_copy = false ;
TRACE ( "X::X( X const& rhs). this=" << this << " rhs.v=" << rhs.v ) ;
if ( throw_on_copy )
{
TRACE ( "throwing exception in X's copy ctor" ) ;
throw 0 ;
}
++ count ;
}
~X()
{
pending_dtor = false ;
-- count ;
TRACE ( "X::~X(). v=" << v << " this=" << this );
}
X& operator= ( X const& rhs )
{
v = rhs.v ;
TRACE ( "X::operator =( X const& rhs). this=" << this << " rhs.v=" << rhs.v ) ;
return *this ;
}
friend bool operator == ( X const& a, X const& b )
{ return a.v == b.v ; }
friend bool operator != ( X const& a, X const& b )
{ return a.v != b.v ; }
friend bool operator < ( X const& a, X const& b )
{ return a.v < b.v ; }
int V() const { return v ; }
int& V() { return v ; }
static int count ;
static bool pending_copy ;
static bool pending_dtor ;
static bool throw_on_copy ;
private :
int v ;
private :
X() ;
} ;
int X::count = 0 ;
bool X::pending_copy = false ;
bool X::pending_dtor = false ;
bool X::throw_on_copy = false ;
inline void set_pending_copy ( X const* x ) { X::pending_copy = true ; }
inline void set_pending_dtor ( X const* x ) { X::pending_dtor = true ; }
inline void set_throw_on_copy ( X const* x ) { X::throw_on_copy = true ; }
inline void reset_throw_on_copy ( X const* x ) { X::throw_on_copy = false ; }
inline void check_is_pending_copy ( X const* x ) { BOOST_CHECK( X::pending_copy ) ; }
inline void check_is_pending_dtor ( X const* x ) { BOOST_CHECK( X::pending_dtor ) ; }
inline void check_is_not_pending_copy( X const* x ) { BOOST_CHECK( !X::pending_copy ) ; }
inline void check_is_not_pending_dtor( X const* x ) { BOOST_CHECK( !X::pending_dtor ) ; }
inline void check_instance_count ( int c, X const* x ) { BOOST_CHECK( X::count == c ) ; }
inline int get_instance_count ( X const* x ) { return X::count ; }
inline void set_pending_copy (...) {}
inline void set_pending_dtor (...) {}
inline void set_throw_on_copy (...) {}
inline void reset_throw_on_copy (...) {}
inline void check_is_pending_copy (...) {}
inline void check_is_pending_dtor (...) {}
inline void check_is_not_pending_copy(...) {}
inline void check_is_not_pending_dtor(...) {}
inline void check_instance_count (...) {}
inline int get_instance_count (...) { return 0 ; }
template<class T>
inline void check_uninitialized_const ( optional<T> const& opt )
{
#ifndef BOOST_OPTIONAL_NO_NULL_COMPARE
BOOST_CHECK( opt == 0 ) ;
#endif
BOOST_CHECK( !opt ) ;
BOOST_CHECK( !get_pointer(opt) ) ;
BOOST_CHECK( !opt.get() ) ;
}
template<class T>
inline void check_uninitialized ( optional<T>& opt )
{
#ifndef BOOST_OPTIONAL_NO_NULL_COMPARE
BOOST_CHECK( opt == 0 ) ;
#endif
BOOST_CHECK( !opt ) ;
BOOST_CHECK( !get_pointer(opt) ) ;
BOOST_CHECK( !opt.get() ) ;
check_uninitialized_const(opt);
}
template<class T>
inline void check_initialized_const ( optional<T> const& opt )
{
BOOST_CHECK( opt ) ;
#ifndef BOOST_OPTIONAL_NO_NULL_COMPARE
BOOST_CHECK( opt != 0 ) ;
#endif
BOOST_CHECK ( !!opt ) ;
BOOST_CHECK ( get_pointer(opt) ) ;
BOOST_CHECK ( opt.get() ) ;
}
template<class T>
inline void check_initialized ( optional<T>& opt )
{
BOOST_CHECK( opt ) ;
#ifndef BOOST_OPTIONAL_NO_NULL_COMPARE
BOOST_CHECK( opt != 0 ) ;
#endif
BOOST_CHECK ( !!opt ) ;
BOOST_CHECK ( get_pointer(opt) ) ;
BOOST_CHECK ( opt.get() ) ;
check_initialized_const(opt);
}
template<class T>
inline void check_value_const ( optional<T> const& opt, T const& v, T const& z )
{
BOOST_CHECK( *opt == v ) ;
BOOST_CHECK( *opt != z ) ;
BOOST_CHECK( (*(opt.operator->()) == v) ) ;
BOOST_CHECK( *get_pointer(opt) == v ) ;
BOOST_CHECK( *opt.get() == v ) ;
}
template<class T>
inline void check_value ( optional<T>& opt, T const& v, T const& z )
{
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1200) // 1200 == VC++ 6.0
// For some reason, VC6.0 is creating a temporary while evaluating (*opt == v),
// so we need to turn throw on copy off first.
reset_throw_on_copy( ARG(T) ) ;
#endif
BOOST_CHECK( *opt == v ) ;
BOOST_CHECK( *opt != z ) ;
BOOST_CHECK( (*(opt.operator->()) == v) ) ;
BOOST_CHECK( *get_pointer(opt) == v ) ;
BOOST_CHECK( *opt.get() == v ) ;
check_value_const(opt,v,z);
}
//
// Basic test.
// Check ordinary functionality:
// Initialization, assignment, comparison and value-accessing.
//
template<class T>
void test_basics( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T z(0);
T a(1);
// Default construction.
// 'def' state is Uninitialized.
// T::T() is not called (and it is not even defined)
optional<T> def ;
check_uninitialized(def);
// Direct initialization.
// 'oa' state is Initialized with 'a'
// T::T( T const& x ) is used.
set_pending_copy( ARG(T) ) ;
optional<T> oa ( a ) ;
check_is_not_pending_copy( ARG(T) );
check_initialized(oa);
check_value(oa,a,z);
T b(2);
optional<T> ob ;
// Value-Assignment upon Uninitialized optional.
// T::T ( T const& x ) is used.
set_pending_copy( ARG(T) ) ;
ob.reset(a) ;
check_is_not_pending_copy( ARG(T) ) ;
check_initialized(ob);
check_value(ob,a,z);
// Value-Assignment upon Initialized optional.
// This uses T::operator= ( T const& x ) directly
// on the reference returned by operator*()
set_pending_dtor( ARG(T) ) ;
set_pending_copy( ARG(T) ) ;
*ob = b ;
check_is_pending_dtor( ARG(T) ) ;
check_is_pending_copy( ARG(T) ) ;
check_initialized(ob);
check_value(ob,b,z);
// Assignment initialization.
// T::T ( T const& x ) is used to copy new value.
set_pending_copy( ARG(T) ) ;
optional<T> const oa2 ( oa ) ;
check_is_not_pending_copy( ARG(T) ) ;
check_initialized_const(oa2);
check_value_const(oa2,a,z);
// Assignment
// T::~T() is used to destroy previous value in ob.
// T::T ( T const& x ) is used to copy new value.
set_pending_dtor( ARG(T) ) ;
set_pending_copy( ARG(T) ) ;
oa = ob ;
check_is_not_pending_dtor( ARG(T) ) ;
check_is_not_pending_copy( ARG(T) ) ;
check_initialized(oa);
check_value(oa,b,z);
// Uninitializing Assignment upon Initialized Optional
// T::~T() is used to destroy previous value in oa.
set_pending_dtor( ARG(T) ) ;
set_pending_copy( ARG(T) ) ;
oa = def ;
check_is_not_pending_dtor( ARG(T) ) ;
check_is_pending_copy ( ARG(T) ) ;
check_uninitialized(oa);
// Uninitializing Assignment upon Uninitialized Optional
// (Dtor is not called this time)
set_pending_dtor( ARG(T) ) ;
set_pending_copy( ARG(T) ) ;
oa = def ;
check_is_pending_dtor( ARG(T) ) ;
check_is_pending_copy( ARG(T) ) ;
check_uninitialized(oa);
// Deinitialization of Initialized Optional
// T::~T() is used to destroy previous value in ob.
set_pending_dtor( ARG(T) ) ;
ob.reset();
check_is_not_pending_dtor( ARG(T) ) ;
check_uninitialized(ob);
// Deinitialization of Uninitialized Optional
// (Dtor is not called this time)
set_pending_dtor( ARG(T) ) ;
ob.reset();
check_is_pending_dtor( ARG(T) ) ;
check_uninitialized(ob);
}
//
// Test Direct Value Manipulation
//
template<class T>
void test_direct_value_manip( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T x(3);
optional<T> const c_opt0(x) ;
optional<T> opt0(x);
BOOST_CHECK( c_opt0->V() == x.V() ) ;
BOOST_CHECK( opt0->V() == x.V() ) ;
BOOST_CHECK( (*c_opt0).V() == x.V() ) ;
BOOST_CHECK( (* opt0).V() == x.V() ) ;
T y(4);
*opt0 = y ;
BOOST_CHECK( (*opt0).V() == y.V() ) ;
BOOST_CHECK( x < (*opt0) ) ;
}
//
// Test Uninitialized access assert
//
template<class T>
void test_uninitialized_access( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
optional<T> def ;
bool passed = false ;
try
{
// This should throw because 'def' is uninitialized
T const& n = *def ;
unused_variable(n);
passed = true ;
}
catch (...) {}
BOOST_CHECK(!passed);
passed = false ;
try
{
T v(5) ;
unused_variable(v);
// This should throw because 'def' is uninitialized
*def = v ;
passed = true ;
}
catch (...) {}
BOOST_CHECK(!passed);
passed = false ;
try
{
// This should throw because 'def' is uninitialized
T v = *(def.operator->()) ;
unused_variable(v);
passed = true ;
}
catch (...) {}
BOOST_CHECK(!passed);
}
#if BOOST_WORKAROUND( BOOST_INTEL_CXX_VERSION, <= 700) // Intel C++ 7.0
void prevent_buggy_optimization( bool v ) {}
#endif
//
// Test Direct Initialization of optional for a T with throwing copy-ctor.
//
template<class T>
void test_throwing_direct_init( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T a(6);
int count = get_instance_count( ARG(T) ) ;
set_throw_on_copy( ARG(T) ) ;
bool passed = false ;
try
{
// This should:
// Attempt to copy construct 'a' and throw.
// 'opt' won't be constructed.
set_pending_copy( ARG(T) ) ;
#if BOOST_WORKAROUND( BOOST_INTEL_CXX_VERSION, <= 700) // Intel C++ 7.0
// Intel C++ 7.0 specific:
// For some reason, when "check_is_not_pending_copy",
// after the exception block is reached,
// X::pending_copy==true even though X's copy ctor set it to false.
// I guessed there is some sort of optimization bug,
// and it seems to be the since the following additional line just
// solves the problem (!?)
prevent_buggy_optimization(X::pending_copy);
#endif
optional<T> opt(a) ;
passed = true ;
}
catch ( ... ){}
BOOST_CHECK(!passed);
check_is_not_pending_copy( ARG(T) );
check_instance_count(count, ARG(T) );
}
//
// Test Value Assignment to an Uninitialized optional for a T with a throwing copy-ctor
//
template<class T>
void test_throwing_val_assign_on_uninitialized( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T a(7);
int count = get_instance_count( ARG(T) ) ;
set_throw_on_copy( ARG(T) ) ;
optional<T> opt ;
bool passed = false ;
try
{
// This should:
// Attempt to copy construct 'a' and throw.
// opt should be left uninitialized.
set_pending_copy( ARG(T) ) ;
opt.reset( a );
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
check_is_not_pending_copy( ARG(T) );
check_instance_count(count, ARG(T) );
check_uninitialized(opt);
}
//
// Test Value Reset on an Initialized optional for a T with a throwing copy-ctor
//
template<class T>
void test_throwing_val_assign_on_initialized( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T z(0);
T a(8);
T b(9);
int count = get_instance_count( ARG(T) ) ;
reset_throw_on_copy( ARG(T) ) ;
optional<T> opt ( b ) ;
++ count ;
check_instance_count(count, ARG(T) );
check_value(opt,b,z);
set_throw_on_copy( ARG(T) ) ;
bool passed = false ;
try
{
// This should:
// Attempt to copy construct 'a' and throw.
// opt should be left uninitialized (even though it was initialized)
set_pending_dtor( ARG(T) ) ;
set_pending_copy( ARG(T) ) ;
opt.reset ( a ) ;
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
-- count ;
check_is_not_pending_dtor( ARG(T) );
check_is_not_pending_copy( ARG(T) );
check_instance_count(count, ARG(T) );
check_uninitialized(opt);
}
//
// Test Copy Initialization from an Initialized optional for a T with a throwing copy-ctor
//
template<class T>
void test_throwing_copy_initialization( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T z(0);
T a(10);
reset_throw_on_copy( ARG(T) ) ;
optional<T> opt (a);
int count = get_instance_count( ARG(T) ) ;
set_throw_on_copy( ARG(T) ) ;
bool passed = false ;
try
{
// This should:
// Attempt to copy construct 'opt' and throw.
// opt1 won't be constructed.
set_pending_copy( ARG(T) ) ;
optional<T> opt1 = opt ;
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
check_is_not_pending_copy( ARG(T) );
check_instance_count(count, ARG(T) );
// Nothing should have happened to the source optional.
check_initialized(opt);
check_value(opt,a,z);
}
//
// Test Assignment to an Uninitialized optional from an Initialized optional
// for a T with a throwing copy-ctor
//
template<class T>
void test_throwing_assign_to_uninitialized( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T z(0);
T a(11);
reset_throw_on_copy( ARG(T) ) ;
optional<T> opt0 ;
optional<T> opt1(a) ;
int count = get_instance_count( ARG(T) ) ;
set_throw_on_copy( ARG(T) ) ;
bool passed = false ;
try
{
// This should:
// Attempt to copy construct 'opt1.value()' into opt0 and throw.
// opt0 should be left uninitialized.
set_pending_copy( ARG(T) ) ;
opt0 = opt1 ;
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
check_is_not_pending_copy( ARG(T) );
check_instance_count(count, ARG(T) );
check_uninitialized(opt0);
}
//
// Test Assignment to an Initialized optional from an Initialized optional
// for a T with a throwing copy-ctor
//
template<class T>
void test_throwing_assign_to_initialized( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T z(0);
T a(12);
T b(13);
reset_throw_on_copy( ARG(T) ) ;
optional<T> opt0(a) ;
optional<T> opt1(b) ;
int count = get_instance_count( ARG(T) ) ;
set_throw_on_copy( ARG(T) ) ;
bool passed = false ;
try
{
// This should:
// Attempt to copy construct 'opt1.value()' into opt0 and throw.
// opt0 should be left uninitialized (even though it was initialized)
set_pending_dtor( ARG(T) ) ;
set_pending_copy( ARG(T) ) ;
opt0 = opt1 ;
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
-- count ;
check_is_not_pending_dtor( ARG(T) );
check_is_not_pending_copy( ARG(T) );
check_instance_count(count, ARG(T) );
check_uninitialized(opt0);
}
//
// Test swap in a no-throwing case
//
template<class T>
void test_no_throwing_swap( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T z(0);
T a(14);
T b(15);
reset_throw_on_copy( ARG(T) ) ;
optional<T> def0 ;
optional<T> def1 ;
optional<T> opt0(a) ;
optional<T> opt1(b) ;
int count = get_instance_count( ARG(T) ) ;
using boost::swap ;
swap(def0,def1);
check_uninitialized(def0);
check_uninitialized(def1);
swap(def0,opt0);
check_uninitialized(opt0);
check_initialized(def0);
check_value(def0,a,z);
// restore def0 and opt0
swap(def0,opt0);
swap(opt0,opt1);
check_instance_count(count, ARG(T) );
check_initialized(opt0);
check_initialized(opt1);
check_value(opt0,b,z);
check_value(opt1,a,z);
}
//
// Test swap in a throwing case
//
template<class T>
void test_throwing_swap( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T a(16);
T b(17);
reset_throw_on_copy( ARG(T) ) ;
optional<T> opt0(a) ;
optional<T> opt1(b) ;
set_throw_on_copy( ARG(T) ) ;
//
// Case 1: Both Initialized.
//
bool passed = false ;
try
{
// This should attempt to swap optionals and fail at swap(X&,X&).
swap(opt0,opt1);
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
// Assuming swap(T&,T&) has at least the basic guarantee, these should hold.
BOOST_CHECK( ( !opt0 || ( !!opt0 && ( ( *opt0 == a ) || ( *opt0 == b ) ) ) ) ) ;
BOOST_CHECK( ( !opt1 || ( !!opt1 && ( ( *opt1 == a ) || ( *opt1 == b ) ) ) ) ) ;
//
// Case 2: Only one Initialized.
//
reset_throw_on_copy( ARG(T) ) ;
opt0.reset();
opt1.reset(a);
set_throw_on_copy( ARG(T) ) ;
passed = false ;
try
{
// This should attempt to swap optionals and fail at opt0.reset(*opt1)
// opt0 should be left uninitialized and opt1 unchanged.
swap(opt0,opt1);
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
check_uninitialized(opt0);
check_initialized(opt1);
check_value(opt1,a,b);
}
//
// This verifies relational operators.
//
template<class T>
void test_relops( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
reset_throw_on_copy( ARG(T) ) ;
T v0(18);
T v1(19);
T v2(19);
optional<T> def0 ;
optional<T> def1 ;
optional<T> opt0(v0);
optional<T> opt1(v1);
optional<T> opt2(v2);
// Check identity
BOOST_CHECK ( def0 == def0 ) ;
BOOST_CHECK ( opt0 == opt0 ) ;
BOOST_CHECK ( !(def0 != def0) ) ;
BOOST_CHECK ( !(opt0 != opt0) ) ;
// If both are uininitalized they compare equal
BOOST_CHECK ( def0 == def1 ) ;
BOOST_CHECK ( !(def0 != def1) ) ;
// If only one is initialized they compare unequal
BOOST_CHECK ( def0 != opt0 ) ;
BOOST_CHECK ( !(def1 == opt1) ) ;
// If both are initialized, values are compared
BOOST_CHECK ( opt0 != opt1 ) ;
BOOST_CHECK ( opt1 == opt2 ) ;
}
void test_with_builtin_types()
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
test_basics( ARG(double) );
test_uninitialized_access( ARG(double) );
test_no_throwing_swap( ARG(double) );
test_relops( ARG(double) ) ;
}
void test_with_class_type()
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
test_basics( ARG(X) );
test_direct_value_manip( ARG(X) );
test_uninitialized_access( ARG(X) );
test_throwing_direct_init( ARG(X) );
test_throwing_val_assign_on_uninitialized( ARG(X) );
test_throwing_val_assign_on_initialized( ARG(X) );
test_throwing_copy_initialization( ARG(X) );
test_throwing_assign_to_uninitialized( ARG(X) );
test_throwing_assign_to_initialized( ARG(X) );
test_no_throwing_swap( ARG(X) );
test_throwing_swap( ARG(X) );
test_relops( ARG(X) ) ;
BOOST_CHECK ( X::count == 0 ) ;
}
int eat ( char ) { return 1 ; }
int eat ( int ) { return 1 ; }
int eat ( void const* ) { return 1 ; }
template<class T> int eat ( T ) { return 0 ; }
//
// This verifies that operator safe_bool() behaves properly.
//
template<class T>
void test_no_implicit_conversions_impl( T const& )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
optional<T> def ;
BOOST_CHECK ( eat(def) == 0 ) ;
}
void test_no_implicit_conversions()
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
char c = 0 ;
int i = 0 ;
void const* p = 0 ;
test_no_implicit_conversions_impl(c);
test_no_implicit_conversions_impl(i);
test_no_implicit_conversions_impl(p);
}
struct A {} ;
void test_conversions()
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
#ifndef BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
char c = 20 ;
optional<char> opt0(c);
optional<int> opt1(opt0);
BOOST_CHECK(*opt1 == static_cast<int>(c));
#endif
#ifndef BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT
float f = 21.22f ;
double d = f ;
optional<float> opt2(f) ;
optional<double> opt3 ;
opt3 = opt2 ;
BOOST_CHECK(*opt3 == d);
#endif
}
int test_main( int, char* [] )
{
try
{
test_with_class_type();
test_with_builtin_types();
test_no_implicit_conversions();
test_conversions();
}
catch ( ... )
{
BOOST_ERROR("Unexpected Exception caught!");
}
return 0;
}

28
test/optional_test_fail1.cpp
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@@ -1,28 +0,0 @@
// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#include "boost/optional.hpp"
//
// THIS TEST SHOULD FAIL TO COMPILE
//
void test_deep_constantness()
{
boost::optional<int> opt ;
boost::optional<int> const copt ;
*copt = opt ; // Cannot assign to "int const&"
}

26
test/optional_test_fail2.cpp
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@@ -1,26 +0,0 @@
// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#include "boost/optional.hpp"
//
// THIS TEST SHOULD FAIL TO COMPILE
//
void test_no_direct_value_assignment()
{
boost::optional<int> opt(3) ;
opt = 4 ; // Cannot assign "int" to "optional<int>"
}

36
test/optional_test_fail3.cpp
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@@ -1,36 +0,0 @@
// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#include "boost/optional.hpp"
//
// THIS TEST SHOULD FAIL TO COMPILE
//
#if BOOST_WORKAROUND( BOOST_INTEL_CXX_VERSION, <= 700) // Intel C++ 7.0
// Interl C++ 7.0 incorrectly accepts the initialization "boost::optional<int> opt = 3"
// even though the ctor is explicit (c.f. 12.3.1.2), so the test uses another form of
// copy-initialization: argument-passing (8.5.12)
void helper ( boost::optional<int> ) ;
void test_explicit_constructor()
{
helper(3) ; // ERROR: Ctor is explicit.
}
#else
void test_explicit_constructor()
{
boost::optional<int> opt = 3 ; // ERROR: Ctor is explicit.
}
#endif

29
test/optional_test_fail4.cpp
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@@ -1,29 +0,0 @@
// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#include "boost/optional.hpp"
//
// THIS TEST SHOULD FAIL TO COMPILE
//
void test_no_implicit_conversion()
{
boost::optional<int> opt(1) ;
// You can compare against 0 or against another optional<>,
// but not against another value
if ( opt == 1 ) ;
}

28
test/optional_test_fail5a.cpp
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@@ -1,28 +0,0 @@
// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#include<string>
#include "boost/optional.hpp"
//
// THIS TEST SHOULD FAIL TO COMPILE
//
void test_no_unsupported_conversion()
{
boost::optional<int> opt1(1) ;
boost::optional< std::string > opt2( opt1 ) ; // Cannot convert from "int" to "std::string"
}

29
test/optional_test_fail5b.cpp
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@@ -1,29 +0,0 @@
// (C) 2003, Fernando Luis Cacciola Carballal.
//
// This material is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
// Permission to use or copy this software for any purpose is hereby granted
// without fee, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#include<string>
#include "boost/optional.hpp"
//
// THIS TEST SHOULD FAIL TO COMPILE
//
void test_no_unsupported_conversion()
{
boost::optional<int> opt1(1) ;
boost::optional< std::string > opt2 ;
opt2 = opt1 ; // Cannot convert from "int" to "std::string"
}