Home » Developing U++ » U++ Developers corner » Bug in msc 7.1 ?
Bug in msc 7.1 ? [message #25709] |
Mon, 08 March 2010 22:55  |
mdelfede
Messages: 1308 Registered: September 2007
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Ultimate Contributor |
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#include <Core/Core.h>
using namespace Upp;
struct pippo : Moveable<pippo>
{
int T;
};
Vector<pippo> pluto()
{
Vector<pippo> p;
p.Add();
return p;
}
CONSOLE_APP_MAIN
{
Vector<pippo>v = pluto();
}
gives this error :
z:\home\massimo\WINDOWS\upp\uppsrc\Core\Topt.h(154) : error C2523: 'pippo::~T' : destructor tag mismatch
z:\home\massimo\WINDOWS\upp\uppsrc\Core\Vcont.hpp(68) : see reference to function template instantiation 'void Upp::DestroyArray<T>(T *,const T *)'
being compiled
with
[
T=pippo
]
Z:\home\massimo\WINDOWS\SDK2003\Microsoft Visual C++ Toolkit 2003\include\xmemory(136) : while compiling class-template member function 'void Upp::V
ector<T>::Free(void)'
with
[
T=pippo
]
Z:\home\massimo\WINDOWS\upp\MyApps\TestVectx\TestVectx.cpp(12) : see reference to class template instantiation 'Upp::Vector<T>' being compiled
with
[
T=pippo
]
Changing the definition of struct pippo like that :
struct pippo : Moveable<pippo>
{
int _T; // <== note, now variable is _T
};
Solves the problem... sigh. It seems to me that M$ compiler makes some mixing between template parameters and variable names in structs....
As usual, GCC behaves right there.
Max
[Updated on: Mon, 08 March 2010 22:56] Report message to a moderator
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Re: Bug in msc 7.1 ? [message #41326 is a reply to message #25709] |
Sun, 01 December 2013 02:46  |
Lance
Messages: 656 Registered: March 2007
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Contributor |
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Interesting. I remember the other day I encountered this problem:
extern "C" extern int array[10];
Compiles fine on VC++11 but will not be accepted in g++ 4.8
I have to revise it to something like
extern "C"{
extern int array[10];
}
I am not sure which is more standard-complying here though.
And I have another very interesting situation. Some predicate I passed to Upp::BiFindIndex(...) stops both VC++11 and g++ upto 4.8 with a compiling error of cannot find a match. And the only thing I need to do to fix it is insert a blank line (or subsequently remove it if there is one already), F5 and it will pass. This symptom is same on both compilers. A recent update on vc++ has fixed the issue but g++ remains the same.
Here is what I do. It can be easily simulated:
inline bool compare_person(const RecordSet::Record& r, int person_id)
{
return r[0].As<int32>()<person_id;
}
String TrialBalanceCtrl::FormattedPerson(int person_id)
{
String s;
[b]
int i=BinFindIndex(person, person_id, compare_person);
//above line will fail g++4.8 from time to time
//simply add or remove a line after it will make
//g++4.8 happy on the next compile pass.
[/b]
if(i!=person.RecordCount() && person(i,0).As<int32>()==person_id)
{
s<<'['<<person(i,"code").As<String>()
<<"] "<<person(i,"name").As<String>();
}
return s;
}
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