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Added more value-initialization tests. Added more comment. Printed revision number. Avoided CodeGear 2010 warning W8070, "Function should return a value".

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[SVN r61175]
This commit is contained in:
Niels Dekker
2010-04-10 10:28:40 +00:00
parent c9829c3a02
commit 7318513e8e
1 changed files with 176 additions and 26 deletions
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202
test/boost_no_com_value_init.ipp
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@ -47,7 +47,21 @@ namespace boost_no_complete_value_initialization
arg.p == 0;
}
struct derived_pod_struct: pod_struct
{
int derived_data;
};
bool is_zero_initialized(const derived_pod_struct& arg)
{
const pod_struct& base_subobject = arg;
return arg.derived_data == 0 && is_zero_initialized(base_subobject);
}
// 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;
@ -66,6 +80,64 @@ namespace boost_no_complete_value_initialization
};
// An aggregate struct of a non-POD class and an int.
struct enum_holder_and_int
{
enum_holder e;
int i;
};
bool is_value_initialized(const enum_holder_and_int& arg)
{
return arg.e.is_default() && arg.i == 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:
bool is_value_initialized() const
{
return private_int == 0 && 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
{
@ -83,6 +155,7 @@ namespace boost_no_complete_value_initialization
virtual ~non_pod_class() {}
};
// The first argument (is_value_initializated) tells whether value initialization
// has succeeded.
// The second argument tells what expression was evaluated.
@ -98,26 +171,47 @@ namespace boost_no_complete_value_initialization
#define IS_TRUE(value) is_true(value, #value)
#define IS_ZERO(value) is_true(value == 0, #value " == 0")
// The default constructor of this class initializes each of its
// data members by means of an empty set of parentheses, and checks
// whether each of them is value-initialized.
// 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]).
class value_initializer
{
private:
enum_holder m_enum_holder;
enum_holder m_enum_holder_array[2];
enum_type m_enum;
char m_char;
unsigned char m_unsigned_char;
enum_type m_enum_array[2];
char m_char;
char m_char_array[2];
unsigned char m_unsigned_char;
unsigned char m_unsigned_char_array[2];
short m_short;
short m_short_array[2];
int m_int;
unsigned m_unsigned;
long m_long;
float m_float;
double m_double;
void* m_ptr;
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];
void* m_ptr;
void* m_ptr_array[2];
pod_struct m_pod;
pod_struct m_pod_array[2];
derived_pod_struct m_derived_pod;
derived_pod_struct m_derived_pod_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_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];
@ -125,19 +219,39 @@ namespace boost_no_complete_value_initialization
value_initializer()
:
m_enum_holder(),
m_enum_holder_array(),
m_enum(),
m_enum_array(),
m_char(),
m_char_array(),
m_unsigned_char(),
m_unsigned_char_array(),
m_short(),
m_short_array(),
m_int(),
m_unsigned(),
m_long(),
m_float(),
m_double(),
m_ptr(),
m_int_array(),
m_unsigned(),
m_unsigned_array(),
m_long(),
m_long_array(),
m_float(),
m_float_array(),
m_double(),
m_double_array(),
m_ptr(),
m_ptr_array(),
m_pod(),
m_pod_array(),
m_derived_pod(),
m_derived_pod_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_destructor_holder(),
m_user_defined_destructor_holder_array(),
m_virtual_destructor_holder(),
m_virtual_destructor_holder_array(),
m_non_pod(),
m_non_pod_array()
{
@ -146,30 +260,66 @@ namespace boost_no_complete_value_initialization
// Returns the number of failures.
unsigned check() const
{
return
const unsigned num_failures =
(IS_TRUE( m_enum_holder.is_default() ) ? 0 : 1) +
(IS_TRUE( m_enum_holder_array[0].is_default() ) ? 0 : 1) +
(IS_TRUE( m_enum_holder_array[1].is_default() ) ? 0 : 1) +
(IS_ZERO(m_enum) ? 0 : 1) +
(IS_ZERO(m_enum_array[0]) ? 0 : 1) +
(IS_ZERO(m_enum_array[1]) ? 0 : 1) +
(IS_ZERO(m_char) ? 0 : 1) +
(IS_ZERO(m_char_array[0]) ? 0 : 1) +
(IS_ZERO(m_char_array[1]) ? 0 : 1) +
(IS_ZERO(m_unsigned_char) ? 0 : 1) +
(IS_ZERO(m_unsigned_char_array[0]) ? 0 : 1) +
(IS_ZERO(m_unsigned_char_array[1]) ? 0 : 1) +
(IS_ZERO(m_short) ? 0 : 1) +
(IS_ZERO(m_short_array[0]) ? 0 : 1) +
(IS_ZERO(m_short_array[1]) ? 0 : 1) +
(IS_ZERO(m_int) ? 0 : 1) +
(IS_ZERO(m_unsigned) ? 0 : 1) +
(IS_ZERO(m_long) ? 0 : 1) +
(IS_ZERO(m_float) ? 0 : 1) +
(IS_ZERO(m_double) ? 0 : 1) +
(IS_ZERO(m_ptr) ? 0 : 1) +
(IS_ZERO(m_int_array[0]) ? 0 : 1) +
(IS_ZERO(m_int_array[1]) ? 0 : 1) +
(IS_ZERO(m_unsigned) ? 0 : 1) +
(IS_ZERO(m_unsigned_array[0]) ? 0 : 1) +
(IS_ZERO(m_unsigned_array[1]) ? 0 : 1) +
(IS_ZERO(m_long) ? 0 : 1) +
(IS_ZERO(m_long_array[0]) ? 0 : 1) +
(IS_ZERO(m_long_array[1]) ? 0 : 1) +
(IS_ZERO(m_float) ? 0 : 1) +
(IS_ZERO(m_float_array[0]) ? 0 : 1) +
(IS_ZERO(m_float_array[1]) ? 0 : 1) +
(IS_ZERO(m_double) ? 0 : 1) +
(IS_ZERO(m_double_array[0]) ? 0 : 1) +
(IS_ZERO(m_double_array[1]) ? 0 : 1) +
(IS_ZERO(m_ptr) ? 0 : 1) +
(IS_ZERO(m_ptr_array[0]) ? 0 : 1) +
(IS_ZERO(m_ptr_array[1]) ? 0 : 1) +
(IS_TRUE( is_zero_initialized(m_pod) ) ? 0 : 1) +
(IS_TRUE( m_non_pod.is_value_initialized() ) ? 0 : 1) +
(IS_TRUE( is_zero_initialized(m_pod_array[0]) ) ? 0 : 1) +
(IS_TRUE( is_zero_initialized(m_pod_array[1]) ) ? 0 : 1) +
(IS_TRUE( is_zero_initialized(m_derived_pod) ) ? 0 : 1) +
(IS_TRUE( is_zero_initialized(m_derived_pod_array[0]) ) ? 0 : 1) +
(IS_TRUE( is_zero_initialized(m_derived_pod_array[1]) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_enum_holder_and_int) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_enum_holder_and_int_array[0]) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_enum_holder_and_int_array[1]) ) ? 0 : 1) +
(IS_TRUE( m_private_and_protected_int.is_value_initialized() ) ? 0 : 1) +
(IS_TRUE( m_private_and_protected_int_array[0].is_value_initialized() ) ? 0 : 1 ) +
(IS_TRUE( m_private_and_protected_int_array[1].is_value_initialized() ) ? 0 : 1 );
(IS_TRUE( is_value_initialized(m_user_defined_destructor_holder) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_user_defined_destructor_holder_array[0]) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_user_defined_destructor_holder_array[1]) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_virtual_destructor_holder) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_virtual_destructor_holder_array[0]) ) ? 0 : 1) +
(IS_TRUE( is_value_initialized(m_virtual_destructor_holder_array[1]) ) ? 0 : 1) +
(IS_TRUE( m_non_pod.is_value_initialized() ) ? 0 : 1) +
(IS_TRUE( m_non_pod_array[0].is_value_initialized() ) ? 0 : 1 ) +
(IS_TRUE( m_non_pod_array[1].is_value_initialized() ) ? 0 : 1 );
return num_failures;
}
};
int test()
{
// Check both value-initialization on the stack and on the heap:
@ -180,11 +330,11 @@ namespace boost_no_complete_value_initialization
if ( num_failures_on_stack > 0 || num_failures_on_heap > 0 )
{
std::cout << "Number of initialization failures on the stack: " << num_failures_on_stack
<< "\nNumber of initialization failures on the heap: " << num_failures_on_heap << std::endl;
<< "\nNumber of initialization failures on the heap: " << num_failures_on_heap
<< "\nDetected by boost_no_complete_value_initialization::test() revision 3."
<< std::endl;
}
return static_cast<int>(num_failures_on_stack + num_failures_on_heap);
}
} // End of namespace.