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Added more documentation to boost_no_complete_value_initialization test.

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[SVN r61625]
This commit is contained in:
Niels Dekker
2010-04-27 19:09:04 +00:00
parent 51a1ad1c2b
commit b54ad840b1
1 changed files with 26 additions and 4 deletions
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28
test/boost_no_com_value_init.ipp
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@ -12,6 +12,21 @@
#include <iostream>
// This test checks various forms of value-initialization:
// - doing member 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 };
@ -54,7 +69,7 @@ namespace boost_no_complete_value_initialization
arg.p == 0;
}
// A POD struct derived from another POD struct.
struct derived_pod_struct: pod_struct
{
int derived_data;
@ -88,6 +103,7 @@ namespace boost_no_complete_value_initialization
}
// A struct, having a bit-field.
struct bit_field_struct
{
bool b : 1;
@ -100,6 +116,7 @@ namespace boost_no_complete_value_initialization
return arg.b == false && arg.c == '\0'&& arg.u == 0U;
}
// A struct, having a function pointer.
struct function_ptr_struct
{
function_ptr_type data;
@ -110,6 +127,7 @@ namespace boost_no_complete_value_initialization
return arg.data == 0;
}
// A struct, having a member function pointer.
struct member_function_ptr_struct
{
member_function_ptr_type data;
@ -120,8 +138,8 @@ namespace boost_no_complete_value_initialization
return arg.data == 0;
}
// Equivalent to the struct TData from CodeGear bug report 51854,
// "Value-initialization: POD struct should be zero-initialized",
// 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
@ -135,6 +153,7 @@ namespace boost_no_complete_value_initialization
}
// A struct, having an int_struct.
struct int_struct_holder
{
int_struct data;
@ -146,6 +165,7 @@ namespace boost_no_complete_value_initialization
}
// A struct derived from int_struct.
struct derived_int_struct: int_struct
{
};
@ -440,6 +460,8 @@ namespace boost_no_complete_value_initialization
}
}
// 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)