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WSJT-X/boost/libs/config/test/boost_no_com_value_init.ipp

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// (C) Copyright Niels Dekker 2010.
// Use, modification and distribution are 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/libs/config for most recent version.
// MACRO: BOOST_NO_COMPLETE_VALUE_INITIALIZATION
// TITLE: No complete value-initialization
// DESCRIPTION: The C++ compiler does not to have implemented value-initialization completely.
// See also boost/libs/utility/value_init.htm#compiler_issues
#include <iostream>
// This test checks various forms of value-initialization:
// - doing subobject initialization inside a constructor
// - creating a temporary object by T()
// - creating a heap object by doing new T()
// It checks various DefaultConstructible types, including fundamental types,
// enum, union, pointer types, array types, POD and non-POD class types. For
// each type of object, a helper function is_value_initialized(const T&) tells
// whether the object is value-initialized.
//
// Note: It appeared insufficient to just check a single POD and a single
// non-POD class type, because some compilers correctly value-initialize some
// POD and some non-POD objects, while failing to value-initialize others.
//
// The test returns the number of encountered value-initialization failures.
namespace boost_no_complete_value_initialization
{
enum enum_type { negative_number = -1, magic_number = 42 };
class incomplete_class;
typedef int (*function_ptr_type)(int);
typedef int (incomplete_class::*member_function_ptr_type)(int);
// A POD struct.
struct pod_struct
{
enum_type e;
bool b;
char c;
unsigned char uc;
short s;
int i;
unsigned u;
long l;
float f;
double d;
long double ld;
void* p;
};
bool is_value_initialized(const pod_struct& arg)
{
return
arg.b == 0 &&
arg.e == 0 &&
arg.c == 0 &&
arg.uc == 0 &&
arg.s == 0 &&
arg.i == 0 &&
arg.u == 0 &&
arg.l == 0 &&
arg.f == 0 &&
arg.d == 0 &&
arg.p == 0;
}
// A POD struct derived from another POD struct.
struct derived_pod_struct: pod_struct
{
int derived_data;
};
bool is_value_initialized(const derived_pod_struct& arg)
{
const pod_struct& base_subobject = arg;
return arg.derived_data == 0 && is_value_initialized(base_subobject);
}
struct empty_struct
{
};
// A POD aggregate struct derived from an empty struct.
// Similar to struct Foo1 from Microsoft Visual C++ bug report 484295,
// "VC++ does not value-initialize members of derived classes without
// user-declared constructor", reported in 2009 by Sylvester Hesp:
// https://connect.microsoft.com/VisualStudio/feedback/details/484295
struct derived_struct: empty_struct
{
int data;
};
bool is_value_initialized(const derived_struct& arg)
{
return arg.data == 0;
}
// A struct, having a bit-field.
struct bit_field_struct
{
bool b : 1;
char c : 7;
unsigned u: 8 * sizeof(unsigned) - 1;
};
bool is_value_initialized(const bit_field_struct& arg)
{
return arg.b == false && arg.c == '\0'&& arg.u == 0U;
}
// A struct, having a function pointer.
struct function_ptr_struct
{
function_ptr_type data;
};
bool is_value_initialized(const function_ptr_struct& arg)
{
return arg.data == 0;
}
// A struct, having a member function pointer.
struct member_function_ptr_struct
{
member_function_ptr_type data;
};
bool is_value_initialized(const member_function_ptr_struct& arg)
{
return arg.data == 0;
}
struct int_pair_struct
{
int first;
int second;
};
typedef int int_pair_struct::*ptr_to_member_type;
struct ptr_to_member_struct
{
ptr_to_member_type data;
};
bool is_value_initialized(const ptr_to_member_struct& arg)
{
return arg.data == 0;
}
// A struct, having an int. Equivalent to the struct TData, from CodeGear bug
// report 51854, "Value-initialization: POD struct should be zero-initialized",
// reported by me (Niels Dekker, LKEB) in 2007:
// http://qc.embarcadero.com/wc/qcmain.aspx?d=51854
struct int_struct
{
int data;
};
bool is_value_initialized(const int_struct& arg)
{
return arg.data == 0;
}
// A struct, having an int_struct.
struct int_struct_holder
{
int_struct data;
};
bool is_value_initialized(const int_struct_holder& arg)
{
return is_value_initialized(arg.data);
}
// A struct derived from int_struct.
struct derived_int_struct: int_struct
{
};
bool is_value_initialized(const derived_int_struct& arg)
{
return arg.data == 0;
}
struct char_array_struct
{
char data[42];
};
bool is_value_initialized(const char_array_struct& arg)
{
for ( unsigned i = 0; i < sizeof(arg.data); ++i)
{
if ( arg.data[i] != 0 )
{
return false;
}
}
return true;
}
class private_int_holder
{
private:
int m_data;
friend bool is_value_initialized(const private_int_holder& arg)
{
return arg.m_data == 0;
}
};
// Equivalent to the Stats class from GCC Bug 33916,
// "Default constructor fails to initialize array members", reported in 2007 by
// Michael Elizabeth Chastain: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916
class private_int_array_pair
{
friend bool is_value_initialized(const private_int_array_pair& arg);
private:
int first[12];
int second[12];
};
bool is_value_initialized(const private_int_array_pair& arg)
{
for ( unsigned i = 0; i < 12; ++i)
{
if ( (arg.first[i] != 0) || (arg.second[i] != 0) )
{
return false;
}
}
return true;
}
union pod_struct_and_int_union
{
pod_struct first;
int second;
};
bool is_value_initialized(const pod_struct_and_int_union& arg)
{
// When a union is zero-initialized, its first non-static
// named data member is zero-initialized ([dcl.init]).
return is_value_initialized(arg.first);
}
union int_and_pod_struct_union
{
int first;
pod_struct second;
};
bool is_value_initialized(const int_and_pod_struct_union& arg)
{
return arg.first == 0;
}
// A class that holds a "magic" enum value.
// Note: This is not a POD class, because it has a user-defined
// default constructor.
class enum_holder
{
enum_type m_enum;
public:
enum_holder()
:
m_enum(magic_number)
{
}
bool is_value_initialized() const
{
return m_enum == magic_number;
}
};
bool is_value_initialized(const enum_holder& arg)
{
return arg.is_value_initialized();
}
// An aggregate struct of a non-POD class and an int.
// Similar to struct A from Microsoft Visual C++ bug report 100744,
// "Value-initialization in new-expression", reported in 2005 by
// Pavel Kuznetsov (MetaCommunications Engineering):
// https://connect.microsoft.com/VisualStudio/feedback/details/100744
struct enum_holder_and_int
{
enum_holder e;
int i;
};
bool is_value_initialized(const enum_holder_and_int& arg)
{
return arg.e.is_value_initialized() && arg.i == 0;
}
class user_defined_copy_constructor_holder
{
public:
int data;
user_defined_copy_constructor_holder()
:
data(0)
{
}
user_defined_copy_constructor_holder(const user_defined_copy_constructor_holder& arg)
:
data(arg.data)
{
}
};
// An aggregate struct that has a data member which has a user-defined
// copy constructor and a data member of a scalar type.
// Similar to struct B from Microsoft Visual C++ bug report 499606,
// "Presence of copy constructor breaks member class initialization",
// reported in 2009 by Alex Vakulenko:
// https://connect.microsoft.com/VisualStudio/feedback/details/499606
struct user_defined_copy_constructor_holder_and_int
{
user_defined_copy_constructor_holder first;
int second;
};
bool is_value_initialized(const user_defined_copy_constructor_holder_and_int& arg)
{
return arg.first.data == 0 && arg.second == 0;
}
// An class that has a private and a protected int data member.
class private_and_protected_int
{
private:
int private_int;
protected:
int protected_int;
public:
friend bool is_value_initialized(const private_and_protected_int& arg)
{
return arg.private_int == 0 && arg.protected_int == 0;
}
};
class user_defined_destructor_holder
{
public:
int i;
~user_defined_destructor_holder()
{
}
};
bool is_value_initialized(const user_defined_destructor_holder& arg)
{
return arg.i == 0;
}
class virtual_destructor_holder
{
public:
int i;
virtual ~virtual_destructor_holder()
{
}
};
bool is_value_initialized(const virtual_destructor_holder& arg)
{
return arg.i == 0;
}
// A class that is not a POD type.
class non_pod_class
{
private:
enum_holder m_enum_holder;
public:
int i;
virtual bool is_value_initialized() const
{
return m_enum_holder.is_value_initialized() && i == 0;
}
virtual ~non_pod_class() {}
};
bool is_value_initialized(const non_pod_class& arg)
{
return arg.is_value_initialized();
}
typedef char _2d_char_array_type[3][4];
bool is_value_initialized(const _2d_char_array_type& arg)
{
for(unsigned i = 0; i < sizeof(_2d_char_array_type); ++i)
{
if ((*arg)[i] != 0)
{
return false;
}
}
return true;
}
typedef char _3d_char_array_type[5][6][7];
bool is_value_initialized(const _3d_char_array_type& arg)
{
for(unsigned i = 0; i < sizeof(_3d_char_array_type); ++i)
{
if ((**arg)[i] != 0)
{
return false;
}
}
return true;
}
// Tells whether an object of a scalar type T is value-initialized.
template <class T>
bool is_value_initialized(const T& arg)
{
return arg == 0;
}
// Wraps a heap object that it has allocated by doing new T().
template <class T>
class heap_object_wrapper
{
private:
T* const m_ptr;
// The following function is intentionally left unimplemented
// (as if deleted, "= delete", in C++0x):
void operator=(heap_object_wrapper);
public:
heap_object_wrapper()
:
m_ptr(new T())
{
}
~heap_object_wrapper()
{
delete m_ptr;
}
// The copy-constructor is intentionally left unimplemented.
heap_object_wrapper(const heap_object_wrapper&);
bool is_wrapped_object_value_initialized() const
{
return (m_ptr != 0) && is_value_initialized(*m_ptr);
}
};
template <class T>
bool is_value_initialized(const heap_object_wrapper<T>& arg)
{
return arg.is_wrapped_object_value_initialized();
}
// Returns zero when the specified object is value-initializated, and one otherwise.
// Prints a message to standard output if the value-initialization has failed.
template <class T>
unsigned failed_to_value_initialized(const T& object, const char *const object_name)
{
if ( is_value_initialized(object) )
{
return 0u;
}
else
{
std::cout << "Note: Failed to value-initialize " << object_name << '.' << std::endl;
return 1u;
}
}
// A macro that passed both the name and the value of the specified object to
// the function above here.
#define FAILED_TO_VALUE_INITIALIZE(value) failed_to_value_initialized(value, #value)
// value_initializer initializes each of its data members by means
// of an empty set of parentheses, and allows checking whether
// each of them is indeed value-initialized, as specified by
// the C++ Standard ([dcl.init]).
//
// Note: its base class, int_struct, is there to try to reproduce GCC Bug 30111,
// "Value-initialization of POD base class doesn't initialize members", reported
// by Jonathan Wakely in 2006: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30111
class value_initializer: private int_struct
{
private:
enum_holder m_enum_holder;
enum_holder m_enum_holder_array[2];
enum_type m_enum;
enum_type m_enum_array[2];
bool m_bool;
bool m_bool_array[2];
char m_char;
char m_char_array[2];
_2d_char_array_type m_2d_char_array;
_3d_char_array_type m_3d_char_array;
unsigned char m_unsigned_char;
unsigned char m_unsigned_char_array[2];
short m_short;
short m_short_array[2];
int m_int;
int m_int_array[2];
unsigned m_unsigned;
unsigned m_unsigned_array[2];
long m_long;
long m_long_array[2];
float m_float;
float m_float_array[2];
double m_double;
double m_double_array[2];
long double m_long_double;
long double m_long_double_array[2];
void* m_void_ptr;
void* m_void_ptr_array[2];
function_ptr_type m_function_ptr;
function_ptr_type m_function_ptr_array[2];
function_ptr_struct m_function_ptr_struct;
function_ptr_struct m_function_ptr_struct_array[2];
member_function_ptr_type m_member_function_ptr;
member_function_ptr_type m_member_function_ptr_array[2];
member_function_ptr_struct m_member_function_ptr_struct;
member_function_ptr_struct m_member_function_ptr_struct_array[2];
ptr_to_member_type m_ptr_to_member;
ptr_to_member_type m_ptr_to_member_array[2];
ptr_to_member_struct m_ptr_to_member_struct;
ptr_to_member_struct m_ptr_to_member_struct_array[2];
bit_field_struct m_bit_field_struct;
bit_field_struct m_bit_field_struct_array[2];
int_struct m_int_struct;
int_struct m_int_struct_array[2];
int_struct m_int_struct_holder;
int_struct m_int_struct_holder_array[2];
pod_struct m_pod_struct;
pod_struct m_pod_struct_array[2];
derived_pod_struct m_derived_pod_struct;
derived_pod_struct m_derived_pod_struct_array[2];
derived_struct m_derived_struct;
derived_struct m_derived_struct_array[2];
derived_int_struct m_derived_int_struct;
derived_int_struct m_derived_int_struct_array[2];
private_int_holder m_private_int_holder;
private_int_holder m_private_int_holder_array[2];
char_array_struct m_char_array_struct;
char_array_struct m_char_array_struct_array[2];
private_int_array_pair m_private_int_array_pair;
private_int_array_pair m_private_int_array_pair_array[2];
enum_holder_and_int m_enum_holder_and_int;
enum_holder_and_int m_enum_holder_and_int_array[2];
private_and_protected_int m_private_and_protected_int;
private_and_protected_int m_private_and_protected_int_array[2];
user_defined_copy_constructor_holder_and_int m_user_defined_copy_constructor_holder_and_int;
user_defined_copy_constructor_holder_and_int m_user_defined_copy_constructor_holder_and_int_array[2];
user_defined_destructor_holder m_user_defined_destructor_holder;
user_defined_destructor_holder m_user_defined_destructor_holder_array[2];
virtual_destructor_holder m_virtual_destructor_holder;
virtual_destructor_holder m_virtual_destructor_holder_array[2];
non_pod_class m_non_pod;
non_pod_class m_non_pod_array[2];
pod_struct_and_int_union m_pod_struct_and_int_union;
pod_struct_and_int_union m_pod_struct_and_int_union_array[2];
int_and_pod_struct_union m_int_and_pod_struct_union;
int_and_pod_struct_union m_int_and_pod_struct_union_array[2];
public:
// Default constructor. Tries to value-initialize its base subobject and all
// of its data.members.
value_initializer()
:
// Note: CodeGear/Borland may produce a warning, W8039, for each data member
// whose type is an array type, saying "Constructor initializer list ignored".
// If it does, it probably won't value-initialize those arrays, as reported
// by me (Niels Dekker, LKEB) in 2010, report 83751, "Value-initialization:
// arrays should have each element value-initialized",
// http://qc.embarcadero.com/wc/qcmain.aspx?d=83751
// On the other hand, Microsoft Visual C++ may produce warnings of type C4351,
// saying "new behavior: elements of array '...' will be default initialized",
// which is actually the right behavior!
int_struct(),
m_enum_holder(),
m_enum_holder_array(),
m_enum(),
m_enum_array(),
m_bool(),
m_bool_array(),
m_char(),
m_char_array(),
m_2d_char_array(),
m_3d_char_array(),
m_unsigned_char(),
m_unsigned_char_array(),
m_short(),
m_short_array(),
m_int(),
m_int_array(),
m_unsigned(),
m_unsigned_array(),
m_long(),
m_long_array(),
m_float(),
m_float_array(),
m_double(),
m_double_array(),
m_long_double(),
m_long_double_array(),
m_void_ptr(),
m_void_ptr_array(),
m_function_ptr(),
m_function_ptr_array(),
m_function_ptr_struct(),
m_function_ptr_struct_array(),
m_member_function_ptr(),
m_member_function_ptr_array(),
m_member_function_ptr_struct(),
m_member_function_ptr_struct_array(),
m_ptr_to_member(),
m_ptr_to_member_array(),
m_ptr_to_member_struct(),
m_ptr_to_member_struct_array(),
m_bit_field_struct(),
m_bit_field_struct_array(),
m_int_struct(),
m_int_struct_array(),
m_int_struct_holder(),
m_int_struct_holder_array(),
m_pod_struct(),
m_pod_struct_array(),
m_derived_pod_struct(),
m_derived_pod_struct_array(),
m_derived_struct(),
m_derived_struct_array(),
m_derived_int_struct(),
m_derived_int_struct_array(),
m_private_int_holder(),
m_private_int_holder_array(),
m_char_array_struct(),
m_char_array_struct_array(),
m_private_int_array_pair(),
m_private_int_array_pair_array(),
m_enum_holder_and_int(),
m_enum_holder_and_int_array(),
m_private_and_protected_int(),
m_private_and_protected_int_array(),
m_user_defined_copy_constructor_holder_and_int(),
m_user_defined_copy_constructor_holder_and_int_array(),
m_user_defined_destructor_holder(),
m_user_defined_destructor_holder_array(),
m_virtual_destructor_holder(),
m_virtual_destructor_holder_array(),
m_non_pod(),
m_non_pod_array(),
m_pod_struct_and_int_union(),
m_pod_struct_and_int_union_array(),
m_int_and_pod_struct_union(),
m_int_and_pod_struct_union_array()
{
}
// Returns the number of failures.
unsigned check_value_initialization_of_subobjects() const
{
const unsigned num_failures =
FAILED_TO_VALUE_INITIALIZE(int_struct::data) +
FAILED_TO_VALUE_INITIALIZE(m_enum_holder) +
FAILED_TO_VALUE_INITIALIZE(m_enum_holder_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_enum_holder_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_enum) +
FAILED_TO_VALUE_INITIALIZE(m_enum_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_enum_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_bool) +
FAILED_TO_VALUE_INITIALIZE(m_bool_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_bool_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_char) +
FAILED_TO_VALUE_INITIALIZE(m_char_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_char_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_2d_char_array) +
FAILED_TO_VALUE_INITIALIZE(m_3d_char_array) +
FAILED_TO_VALUE_INITIALIZE(m_unsigned_char) +
FAILED_TO_VALUE_INITIALIZE(m_unsigned_char_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_unsigned_char_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_short) +
FAILED_TO_VALUE_INITIALIZE(m_short_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_short_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_int) +
FAILED_TO_VALUE_INITIALIZE(m_int_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_int_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_unsigned) +
FAILED_TO_VALUE_INITIALIZE(m_unsigned_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_unsigned_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_long) +
FAILED_TO_VALUE_INITIALIZE(m_long_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_long_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_float) +
FAILED_TO_VALUE_INITIALIZE(m_float_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_float_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_double) +
FAILED_TO_VALUE_INITIALIZE(m_double_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_double_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_long_double) +
FAILED_TO_VALUE_INITIALIZE(m_long_double_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_long_double_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_void_ptr) +
FAILED_TO_VALUE_INITIALIZE(m_void_ptr_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_void_ptr_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_function_ptr) +
FAILED_TO_VALUE_INITIALIZE(m_function_ptr_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_function_ptr_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_function_ptr_struct) +
FAILED_TO_VALUE_INITIALIZE(m_function_ptr_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_function_ptr_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_member_function_ptr) +
FAILED_TO_VALUE_INITIALIZE(m_member_function_ptr_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_member_function_ptr_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_member_function_ptr_struct) +
FAILED_TO_VALUE_INITIALIZE(m_member_function_ptr_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_member_function_ptr_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_ptr_to_member) +
FAILED_TO_VALUE_INITIALIZE(m_ptr_to_member_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_ptr_to_member_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_ptr_to_member_struct) +
FAILED_TO_VALUE_INITIALIZE(m_ptr_to_member_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_ptr_to_member_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_bit_field_struct) +
FAILED_TO_VALUE_INITIALIZE(m_bit_field_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_bit_field_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_int_struct) +
FAILED_TO_VALUE_INITIALIZE(m_int_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_int_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_int_struct_holder) +
FAILED_TO_VALUE_INITIALIZE(m_int_struct_holder_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_int_struct_holder_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_pod_struct) +
FAILED_TO_VALUE_INITIALIZE(m_pod_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_pod_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_derived_pod_struct) +
FAILED_TO_VALUE_INITIALIZE(m_derived_pod_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_derived_pod_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_derived_struct) +
FAILED_TO_VALUE_INITIALIZE(m_derived_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_derived_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_derived_int_struct) +
FAILED_TO_VALUE_INITIALIZE(m_derived_int_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_derived_int_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_private_int_holder) +
FAILED_TO_VALUE_INITIALIZE(m_private_int_holder_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_private_int_holder_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_char_array_struct) +
FAILED_TO_VALUE_INITIALIZE(m_char_array_struct_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_char_array_struct_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_private_int_array_pair) +
FAILED_TO_VALUE_INITIALIZE(m_private_int_array_pair_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_private_int_array_pair_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_enum_holder_and_int) +
FAILED_TO_VALUE_INITIALIZE(m_enum_holder_and_int_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_enum_holder_and_int_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_private_and_protected_int) +
FAILED_TO_VALUE_INITIALIZE(m_private_and_protected_int_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_private_and_protected_int_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_user_defined_copy_constructor_holder_and_int) +
FAILED_TO_VALUE_INITIALIZE(m_user_defined_copy_constructor_holder_and_int_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_user_defined_copy_constructor_holder_and_int_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_user_defined_destructor_holder) +
FAILED_TO_VALUE_INITIALIZE(m_user_defined_destructor_holder_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_user_defined_destructor_holder_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_virtual_destructor_holder) +
FAILED_TO_VALUE_INITIALIZE(m_virtual_destructor_holder_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_virtual_destructor_holder_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_non_pod) +
FAILED_TO_VALUE_INITIALIZE(m_non_pod_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_non_pod_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_pod_struct_and_int_union) +
FAILED_TO_VALUE_INITIALIZE(m_pod_struct_and_int_union_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_pod_struct_and_int_union_array[1]) +
FAILED_TO_VALUE_INITIALIZE(m_int_and_pod_struct_union) +
FAILED_TO_VALUE_INITIALIZE(m_int_and_pod_struct_union_array[0]) +
FAILED_TO_VALUE_INITIALIZE(m_int_and_pod_struct_union_array[1]);
return num_failures;
}
};
// Checks value-initialization of a number of small temporary objects.
// Returns the number of failures.
unsigned check_value_initialization_of_temporaries()
{
typedef long double long_double_type;
typedef unsigned char unsigned_char_type;
typedef void* void_ptr_type;
const unsigned num_failures =
FAILED_TO_VALUE_INITIALIZE(enum_holder()) +
FAILED_TO_VALUE_INITIALIZE(enum_type()) +
FAILED_TO_VALUE_INITIALIZE(bool()) +
FAILED_TO_VALUE_INITIALIZE(char()) +
FAILED_TO_VALUE_INITIALIZE(unsigned_char_type()) +
FAILED_TO_VALUE_INITIALIZE(short()) +
FAILED_TO_VALUE_INITIALIZE(int()) +
FAILED_TO_VALUE_INITIALIZE(unsigned()) +
FAILED_TO_VALUE_INITIALIZE(long()) +
FAILED_TO_VALUE_INITIALIZE(float()) +
FAILED_TO_VALUE_INITIALIZE(double()) +
FAILED_TO_VALUE_INITIALIZE(long_double_type()) +
FAILED_TO_VALUE_INITIALIZE(void_ptr_type()) +
FAILED_TO_VALUE_INITIALIZE(bit_field_struct()) +
FAILED_TO_VALUE_INITIALIZE(function_ptr_type()) +
FAILED_TO_VALUE_INITIALIZE(function_ptr_struct()) +
FAILED_TO_VALUE_INITIALIZE(member_function_ptr_type()) +
FAILED_TO_VALUE_INITIALIZE(member_function_ptr_struct()) +
FAILED_TO_VALUE_INITIALIZE(ptr_to_member_type()) +
FAILED_TO_VALUE_INITIALIZE(ptr_to_member_struct()) +
FAILED_TO_VALUE_INITIALIZE(int_struct()) +
FAILED_TO_VALUE_INITIALIZE(int_struct_holder()) +
FAILED_TO_VALUE_INITIALIZE(pod_struct()) +
FAILED_TO_VALUE_INITIALIZE(derived_pod_struct()) +
FAILED_TO_VALUE_INITIALIZE(derived_struct()) +
FAILED_TO_VALUE_INITIALIZE(derived_int_struct()) +
FAILED_TO_VALUE_INITIALIZE(private_int_holder()) +
FAILED_TO_VALUE_INITIALIZE(char_array_struct()) +
FAILED_TO_VALUE_INITIALIZE(private_int_array_pair()) +
// IBM's XL V10.1.0.0 may fail to value-initialize a temporary of a non-POD
// type like enum_holder_and_int, virtual_destructor_holder, or non_pod_class,
// as appeared at the Boost Config/trunk regression page in April 2010.
// Michael Wong (IBM Canada Ltd) confirmed the issue to me (Niels Dekker, LKEB),
// and gave it high priority.
FAILED_TO_VALUE_INITIALIZE(enum_holder_and_int()) +
FAILED_TO_VALUE_INITIALIZE(private_and_protected_int()) +
FAILED_TO_VALUE_INITIALIZE(user_defined_copy_constructor_holder_and_int()) +
// The following line, doing user_defined_destructor_holder(), causes
// a compilation error on Embarcadero 2010 (Borland/CodeGear 6.21),
// as reported by me (Niels Dekker, LKEB) in 2010, bug report 83851,
// "Value-initialized temporary triggers internal backend error C1798",
// http://qc.embarcadero.com/wc/qcmain.aspx?d=83851
FAILED_TO_VALUE_INITIALIZE(user_defined_destructor_holder()) +
FAILED_TO_VALUE_INITIALIZE(virtual_destructor_holder()) +
FAILED_TO_VALUE_INITIALIZE(non_pod_class()) +
FAILED_TO_VALUE_INITIALIZE(pod_struct_and_int_union()) +
FAILED_TO_VALUE_INITIALIZE(int_and_pod_struct_union());
return num_failures;
}
// Checks value-initialization of small heap objects.
// Returns the number of failures.
unsigned check_value_initialization_of_heap_objects()
{
const unsigned num_failures =
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<enum_holder>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<enum_type>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<bool>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<char>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<unsigned char>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<short>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<int>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<unsigned>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<long>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<float>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<double>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<long double>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<void*>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<function_ptr_type>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<function_ptr_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<member_function_ptr_type>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<member_function_ptr_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<ptr_to_member_type>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<ptr_to_member_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<bit_field_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<int_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<int_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<pod_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<derived_pod_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<derived_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<derived_int_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<char_array_struct>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<private_int_holder>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<private_int_array_pair>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<enum_holder_and_int>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<private_and_protected_int>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<user_defined_copy_constructor_holder_and_int>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<user_defined_destructor_holder>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<virtual_destructor_holder>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<non_pod_class>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<pod_struct_and_int_union>() ) +
FAILED_TO_VALUE_INITIALIZE( heap_object_wrapper<int_and_pod_struct_union>() );
return num_failures;
}
// Equivalent to the dirty_stack() function from GCC Bug 33916,
// "Default constructor fails to initialize array members", reported in 2007 by
// Michael Elizabeth Chastain: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916
void dirty_stack()
{
unsigned char array_on_stack[sizeof(value_initializer) + 256];
for (unsigned i = 0; i < sizeof(array_on_stack); ++i)
{
array_on_stack[i] = 0x11;
}
}
// Checks value-initialization of the subobjects of a temporary object,
// an object on the stack, an object on the heap; furthermore it checks
// value-initialization of a number of smaller temporary objects and
// heap objects.
int test()
{
unsigned total_num_failures = 0;
dirty_stack();
const unsigned num_failures_of_subobjects_of_a_temporary =
value_initializer().check_value_initialization_of_subobjects();
total_num_failures += num_failures_of_subobjects_of_a_temporary;
if ( total_num_failures > 0 )
{
std::cout << "- Number of subobject initialization failures of a temporary: "
<< num_failures_of_subobjects_of_a_temporary << std::endl;
}
dirty_stack();
value_initializer object_on_stack;
const unsigned num_failures_of_subobjects_on_stack =
object_on_stack.check_value_initialization_of_subobjects();
total_num_failures += num_failures_of_subobjects_on_stack;
if ( total_num_failures > 0 )
{
std::cout << "- Number of subobject initialization failures on the stack: "
<< num_failures_of_subobjects_on_stack << std::endl;
}
const value_initializer* const ptr = new value_initializer();
const unsigned num_failures_of_subobjects_on_heap = ptr->check_value_initialization_of_subobjects();
delete ptr;
total_num_failures += num_failures_of_subobjects_on_heap;
if ( total_num_failures > 0 )
{
std::cout << "- Number of subobject initialization failures on the heap: "
<< num_failures_of_subobjects_on_heap << std::endl;
}
dirty_stack();
const unsigned num_failures_of_temporaries = check_value_initialization_of_temporaries();
total_num_failures += num_failures_of_temporaries;
if ( total_num_failures > 0 )
{
std::cout << "- Number of initialization failures of temporary objects: "
<< num_failures_of_temporaries << std::endl;
}
const unsigned num_failures_of_heap_objects = check_value_initialization_of_heap_objects();
total_num_failures += num_failures_of_heap_objects;
if ( total_num_failures > 0 )
{
std::cout << "- Number of failures of heap objects: "
<< num_failures_of_heap_objects << std::endl;
}
if ( total_num_failures > 0 )
{
std::cout << "-- Total number of initialization failures ("
<< num_failures_of_subobjects_of_a_temporary << '+'
<< num_failures_of_subobjects_on_stack << '+'
<< num_failures_of_subobjects_on_heap << '+'
<< num_failures_of_temporaries << '+'
<< num_failures_of_heap_objects << "): "
<< total_num_failures
<< "\nDetected by boost_no_complete_value_initialization::test() revision 32."
<< std::endl;
}
return static_cast<int>(total_num_failures);
}
} // End of namespace.
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