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1313 lines (1051 loc) · 31.8 KB
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// 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
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
// Revisions:
// 12 May 2008 (added more swap tests)
//
#include<iostream>
#include<stdexcept>
#include<string>
#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"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "boost/none.hpp"
#include "boost/test/minimal.hpp"
#include "optional_test_common.cpp"
void test_implicit_construction ( optional<double> opt, double v, double z )
{
check_value(opt,v,z);
}
void test_implicit_construction ( optional<X> opt, X const& v, X const& z )
{
check_value(opt,v,z);
}
void test_default_implicit_construction ( double, optional<double> opt )
{
BOOST_CHECK(!opt);
}
void test_default_implicit_construction ( X const&, optional<X> opt )
{
BOOST_CHECK(!opt);
}
//
// 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);
// Implicit construction
// The first parameter is implicitely converted to optional<T>(a);
test_implicit_construction(a,a,z);
// 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 = a ;
check_is_not_pending_copy( ARG(T) ) ;
check_initialized(ob);
check_value(ob,a,z);
// Value-Assignment upon Initialized optional.
// T::operator=( T const& x ) is used
set_pending_assign( ARG(T) ) ;
set_pending_copy ( ARG(T) ) ;
set_pending_dtor ( ARG(T) ) ;
ob = b ;
check_is_not_pending_assign( ARG(T) ) ;
check_is_pending_copy ( ARG(T) ) ;
check_is_pending_dtor ( 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::operator= ( T const& x ) is used to copy new value.
set_pending_assign( ARG(T) ) ;
oa = ob ;
check_is_not_pending_assign( 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);
}
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
check_initialized(o0);
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 ) ;
}
//
// 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.get().V() == x.V() ) ;
BOOST_CHECK( opt0.get().V() == x.V() ) ;
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( get(opt0).V() == y.V() ) ;
}
//
// 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.get() ;
unused_variable(n);
passed = true ;
}
catch (...) {}
BOOST_CHECK(!passed);
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) );
reset_throw_on_copy( 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);
reset_throw_on_copy( ARG(T) ) ;
}
//
// 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);
T x(-1);
int count = get_instance_count( ARG(T) ) ;
optional<T> opt ( b ) ;
++ count ;
check_instance_count(count, ARG(T) );
check_value(opt,b,z);
set_throw_on_assign( ARG(T) ) ;
bool passed = false ;
try
{
// This should:
// Attempt to assign 'a' and throw.
// opt is kept initialized but its value not neccesarily fully assigned
// (in this test, incompletely assigned is flaged with the value -1 being set)
set_pending_assign( ARG(T) ) ;
opt.reset ( a ) ;
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
check_is_not_pending_assign( ARG(T) );
check_instance_count(count, ARG(T) );
check_initialized(opt);
check_value(opt,x,z);
reset_throw_on_assign ( ARG(T) ) ;
}
//
// 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);
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);
reset_throw_on_copy( ARG(T) ) ;
}
//
// 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);
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);
reset_throw_on_copy( ARG(T) ) ;
}
//
// 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);
T x(-1);
optional<T> opt0(a) ;
optional<T> opt1(b) ;
int count = get_instance_count( ARG(T) ) ;
set_throw_on_assign( ARG(T) ) ;
bool passed = false ;
try
{
// This should:
// Attempt to copy construct 'opt1.value()' into opt0 and throw.
// opt0 is kept initialized but its value not neccesarily fully assigned
// (in this test, incompletely assigned is flaged with the value -1 being set)
set_pending_assign( ARG(T) ) ;
opt0 = opt1 ;
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
// opt0 was left uninitialized
check_is_not_pending_assign( ARG(T) );
check_instance_count(count, ARG(T) );
check_initialized(opt0);
check_value(opt0,x,z);
reset_throw_on_assign( ARG(T) ) ;
}
//
// 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);
optional<T> def0 ;
optional<T> def1 ;
optional<T> opt0(a) ;
optional<T> opt1(b) ;
int count = get_instance_count( ARG(T) ) ;
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);
T x(-1);
optional<T> opt0(a) ;
optional<T> opt1(b) ;
set_throw_on_assign( 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);
// optional's swap doesn't affect the initialized states of the arguments. Therefore,
// the following must hold:
check_initialized(opt0);
check_initialized(opt1);
check_value(opt0,x,a);
check_value(opt1,b,x);
//
// Case 2: Only one Initialized.
//
reset_throw_on_assign( 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)
// Both opt0 and op1 are left unchanged (unswaped)
swap(opt0,opt1);
passed = true ;
}
catch ( ... ) {}
BOOST_CHECK(!passed);
check_uninitialized(opt0);
check_initialized(opt1);
check_value(opt1,a,x);
reset_throw_on_copy( ARG(T) ) ;
}
//
// This verifies relational operators.
//
template<class T>
void test_relops( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T v0(0);
T v1(1);
T v2(1);
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) ) ;
// Check when both are uininitalized.
BOOST_CHECK ( def0 == def1 ) ; // both uninitialized compare equal
BOOST_CHECK ( !(def0 < def1) ) ; // uninitialized is never less than uninitialized
BOOST_CHECK ( !(def0 > def1) ) ; // uninitialized is never greater than uninitialized
BOOST_CHECK ( !(def0 != def1) ) ;
BOOST_CHECK ( def0 <= def1 ) ;
BOOST_CHECK ( def0 >= def1 ) ;
// Check when only lhs is uninitialized.
BOOST_CHECK ( def0 != opt0 ) ; // uninitialized is never equal to initialized
BOOST_CHECK ( !(def0 == opt0) ) ;
BOOST_CHECK ( def0 < opt0 ) ; // uninitialized is always less than initialized
BOOST_CHECK ( !(def0 > opt0) ) ;
BOOST_CHECK ( def0 <= opt0 ) ;
BOOST_CHECK ( !(def0 >= opt0) ) ;
// Check when only rhs is uninitialized.
BOOST_CHECK ( opt0 != def0 ) ; // initialized is never equal to uninitialized
BOOST_CHECK ( !(opt0 == def0) ) ;
BOOST_CHECK ( !(opt0 < def0) ) ; // initialized is never less than uninitialized
BOOST_CHECK ( opt0 > def0 ) ;
BOOST_CHECK ( !(opt0 <= def0) ) ;
BOOST_CHECK ( opt0 >= opt0 ) ;
// If both are initialized, values are compared
BOOST_CHECK ( opt0 != opt1 ) ;
BOOST_CHECK ( opt1 == opt2 ) ;
BOOST_CHECK ( opt0 < opt1 ) ;
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 ) ;
BOOST_CHECK ( opt1 == v2 ) ;
BOOST_CHECK ( opt0 < v1 ) ;
BOOST_CHECK ( opt1 > v0 ) ;
BOOST_CHECK ( opt1 <= v2 ) ;
BOOST_CHECK ( opt1 >= v0 ) ;
BOOST_CHECK ( v0 != opt1 ) ;
BOOST_CHECK ( v1 == opt2 ) ;
BOOST_CHECK ( v0 < opt1 ) ;
BOOST_CHECK ( v1 > opt0 ) ;
BOOST_CHECK ( v1 <= opt2 ) ;
BOOST_CHECK ( v1 >= opt0 ) ;
BOOST_CHECK ( def0 != v0 ) ;
BOOST_CHECK ( !(def0 == v0) ) ;
BOOST_CHECK ( def0 < v0 ) ;
BOOST_CHECK ( !(def0 > v0) ) ;
BOOST_CHECK ( def0 <= v0 ) ;
BOOST_CHECK ( !(def0 >= v0) ) ;
BOOST_CHECK ( v0 != def0 ) ;
BOOST_CHECK ( !(v0 == def0) ) ;
BOOST_CHECK ( !(v0 < def0) ) ;
BOOST_CHECK ( v0 > def0 ) ;
BOOST_CHECK ( !(v0 <= def0) ) ;
BOOST_CHECK ( v0 >= opt0 ) ;
}
template<class T>
void test_none( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
using boost::none ;
optional<T> def0 ;
optional<T> def1(none) ;
optional<T> non_def( T(1234) ) ;
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 ) ;
non_def = none ;
BOOST_CHECK ( !non_def ) ;
test_default_implicit_construction(T(1),none);
}
template<class T>
void test_arrow( T const* )
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
T a(1234);
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 ) ;
}
void test_with_builtin_types()
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
test_basics( ARG(double) );
test_conditional_ctor_and_get_valur_or( ARG(double) );
test_uninitialized_access( ARG(double) );
test_no_throwing_swap( ARG(double) );
test_relops( ARG(double) ) ;
test_none( ARG(double) ) ;
}
void test_with_class_type()
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
test_basics( ARG(X) );
test_conditional_ctor_and_get_valur_or( 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) ) ;
test_none( ARG(X) ) ;
test_arrow( ARG(X) ) ;
BOOST_CHECK ( X::count == 0 ) ;
}
int eat ( bool ) { return 1 ; }
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 );
bool b = false ;
char c = 0 ;
int i = 0 ;
void const* p = 0 ;
test_no_implicit_conversions_impl(b);
test_no_implicit_conversions_impl(c);
test_no_implicit_conversions_impl(i);
test_no_implicit_conversions_impl(p);
}
struct A {} ;
void test_conversions1()
{
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
}
void test_conversions2()
{
TRACE( std::endl << BOOST_CURRENT_FUNCTION );
char c = 20 ;
optional<int> opt(c);
BOOST_CHECK( get(opt) == static_cast<int>(c));
float f = 21.22f ;
optional<double> opt1;
opt1 = f ;
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();
}
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