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Posted to issues@stdcxx.apache.org by "Travis Vitek (JIRA)" <ji...@apache.org> on 2008/07/03 00:04:44 UTC
[jira] Created: (STDCXX-983) [Linux/gcc] 20.meta.unary.prop.cpp
fails is_pod assertions
[Linux/gcc] 20.meta.unary.prop.cpp fails is_pod assertions
----------------------------------------------------------
Key: STDCXX-983
URL: https://issues.apache.org/jira/browse/STDCXX-983
Project: C++ Standard Library
Issue Type: Bug
Components: TR1.4 - Metaprogramming and Type Traits
Affects Versions: 4.3
Environment: gcc-4.3
Reporter: Travis Vitek
Fix For: 4.3
I'm pretty confident that the following should compile and run without failure. It abbends with SIGABRT with recent versions of gcc-4.3.
{{noformat}}
$ cat t.cpp && g++ t.cpp && ./a.out
#include <assert.h>
struct empty_t
{
};
struct trivial_t
{
long value;
};
template <class T>
struct public_derived_t : T
{
};
int main ()
{
assert (__is_pod(trivial_t));
assert (__is_pod(public_derived_t<trivial_t>));
assert (__is_pod(empty_t));
assert (__is_pod(public_derived_t<empty_t>));
return 0;
}
a.out: t.cpp:20: int main(): Assertion `__is_pod(public_derived_t<trivial_t>)' failed.
Aborted
{{noformat}}
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[jira] Commented: (STDCXX-983) [Linux/gcc] 20.meta.unary.prop.cpp
fails is_pod assertions
Posted by "Travis Vitek (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12610069#action_12610069 ]
Travis Vitek commented on STDCXX-983:
-------------------------------------
This is the documentation for the helper (taken from [here|http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Type-Traits.html#Type-Traits])
__is_pod (type){quote}If type is a cv POD type ([basic.types]) then the trait is true, else it is false. Requires: type shall be a complete type, an array of unknown bound or is a void type.{quote}
Here are the pertenent sections of the standard
3.9 p9{quote}Scalar types, POD classes (clause 9), arrays of such types and cv-qualified versions of these types (3.9.3) are collectively called POD types. Scalar types, trivial class types (clause 9), arrays of such types and cv-qualified versions of these types (3.9.3) are collectively called trivial types. Scalar types, standard-layout class types (clause 9), arrays of such types and cv-qualified versions of these types (3.9.3) are collectively called standard-layout types.{quote}
9 p5{quote}a trivial class is a class that
-- has a trivial default constructor
-- has a trivial copy constructor
-- has a trivial copy assignment operator
-- has a trivial destructor
{quote}
9 p6{quote}a standard-layout class is a class that
-- has no non-static data members of type non-standard-layout class (or array of such types) or reference
-- has no virtual functions and no virtual base classes
-- has the same access control for all non-static data members
-- has no non-standard-layout base classes
-- either has no non-static data members in the most-derived class and at most one base class with non-static data members, or has no base classes with non-static data members
-- has no base classes of the same type as the first non-static data member
{quote}
9 p9{quote}a POD struct is a class that is both a trivial class and a standard-layout class, and has no non-static data members of type non-POD struct, non-POD union (or array of such types). Similarly, a POD union is a union that is both a trivial class and a standard layout class, and has no non-static data members of type non-POD struct, non-POD union (or array of such types).A POD class is a class that is either a POD struct or a POD union.{quote}
> [Linux/gcc] 20.meta.unary.prop.cpp fails is_pod assertions
> ----------------------------------------------------------
>
> Key: STDCXX-983
> URL: https://issues.apache.org/jira/browse/STDCXX-983
> Project: C++ Standard Library
> Issue Type: Bug
> Components: TR1.4 - Metaprogramming and Type Traits
> Affects Versions: 4.3
> Environment: gcc-4.3
> Reporter: Travis Vitek
> Fix For: 4.3
>
>
> I'm pretty confident that the following should compile and run without failure. It abbends with SIGABRT with recent versions of gcc-4.3.
> {noformat}
> $ cat t.cpp && g++ t.cpp && ./a.out
> #include <assert.h>
> struct empty_t
> {
> };
> struct trivial_t
> {
> long value;
> };
> template <class T>
> struct public_derived_t : T
> {
> };
> int main ()
> {
> assert (__is_pod(trivial_t));
> assert (__is_pod(public_derived_t<trivial_t>));
> assert (__is_pod(empty_t));
> assert (__is_pod(public_derived_t<empty_t>));
> return 0;
> }
> a.out: t.cpp:20: int main(): Assertion `__is_pod(public_derived_t<trivial_t>)' failed.
> Aborted
> {noformat}
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[jira] Updated: (STDCXX-983) [Linux/gcc] 20.meta.unary.prop.cpp
fails is_pod assertions
Posted by "Travis Vitek (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-983?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Travis Vitek updated STDCXX-983:
--------------------------------
Description:
I'm pretty confident that the following should compile and run without failure. It abbends with SIGABRT with recent versions of gcc-4.3.
{noformat}
$ cat t.cpp && g++ t.cpp && ./a.out
#include <assert.h>
struct empty_t
{
};
struct trivial_t
{
long value;
};
template <class T>
struct public_derived_t : T
{
};
int main ()
{
assert (__is_pod(trivial_t));
assert (__is_pod(public_derived_t<trivial_t>));
assert (__is_pod(empty_t));
assert (__is_pod(public_derived_t<empty_t>));
return 0;
}
a.out: t.cpp:20: int main(): Assertion `__is_pod(public_derived_t<trivial_t>)' failed.
Aborted
{noformat}
was:
I'm pretty confident that the following should compile and run without failure. It abbends with SIGABRT with recent versions of gcc-4.3.
{{noformat}}
$ cat t.cpp && g++ t.cpp && ./a.out
#include <assert.h>
struct empty_t
{
};
struct trivial_t
{
long value;
};
template <class T>
struct public_derived_t : T
{
};
int main ()
{
assert (__is_pod(trivial_t));
assert (__is_pod(public_derived_t<trivial_t>));
assert (__is_pod(empty_t));
assert (__is_pod(public_derived_t<empty_t>));
return 0;
}
a.out: t.cpp:20: int main(): Assertion `__is_pod(public_derived_t<trivial_t>)' failed.
Aborted
{{noformat}}
Fix formatting.
> [Linux/gcc] 20.meta.unary.prop.cpp fails is_pod assertions
> ----------------------------------------------------------
>
> Key: STDCXX-983
> URL: https://issues.apache.org/jira/browse/STDCXX-983
> Project: C++ Standard Library
> Issue Type: Bug
> Components: TR1.4 - Metaprogramming and Type Traits
> Affects Versions: 4.3
> Environment: gcc-4.3
> Reporter: Travis Vitek
> Fix For: 4.3
>
>
> I'm pretty confident that the following should compile and run without failure. It abbends with SIGABRT with recent versions of gcc-4.3.
> {noformat}
> $ cat t.cpp && g++ t.cpp && ./a.out
> #include <assert.h>
> struct empty_t
> {
> };
> struct trivial_t
> {
> long value;
> };
> template <class T>
> struct public_derived_t : T
> {
> };
> int main ()
> {
> assert (__is_pod(trivial_t));
> assert (__is_pod(public_derived_t<trivial_t>));
> assert (__is_pod(empty_t));
> assert (__is_pod(public_derived_t<empty_t>));
> return 0;
> }
> a.out: t.cpp:20: int main(): Assertion `__is_pod(public_derived_t<trivial_t>)' failed.
> Aborted
> {noformat}
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[jira] Updated: (STDCXX-983) [Linux/gcc] 20.meta.unary.prop.cpp
fails is_pod assertions
Posted by "Martin Sebor (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-983?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Sebor updated STDCXX-983:
--------------------------------
Component/s: (was: TR1.4 - Metaprogramming and Type Traits)
External
Affects Version/s: (was: 4.3)
Fix Version/s: (was: 4.3)
This is a bug in third party software (gcc), not in stdcxx. Set Component to External.
> [Linux/gcc] 20.meta.unary.prop.cpp fails is_pod assertions
> ----------------------------------------------------------
>
> Key: STDCXX-983
> URL: https://issues.apache.org/jira/browse/STDCXX-983
> Project: C++ Standard Library
> Issue Type: Bug
> Components: External
> Environment: gcc-4.3
> Reporter: Travis Vitek
>
> I'm pretty confident that the following should compile and run without failure. It abbends with SIGABRT with recent versions of gcc-4.3.
> {noformat}
> $ cat t.cpp && g++ t.cpp && ./a.out
> #include <assert.h>
> struct empty_t
> {
> };
> struct trivial_t
> {
> long value;
> };
> template <class T>
> struct public_derived_t : T
> {
> };
> int main ()
> {
> assert (__is_pod(trivial_t));
> assert (__is_pod(public_derived_t<trivial_t>));
> assert (__is_pod(empty_t));
> assert (__is_pod(public_derived_t<empty_t>));
> return 0;
> }
> a.out: t.cpp:20: int main(): Assertion `__is_pod(public_derived_t<trivial_t>)' failed.
> Aborted
> {noformat}
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