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https://issues.apache.org/jira/browse/STDCXX-605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12546445
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Travis Vitek commented on STDCXX-605:
-------------------------------------
This appears to be a compiler bug. Here is a simple testcase.
[EMAIL PROTECTED] examples]$ cat t.cpp && xlCcore -g -q64 t.cpp
template <class T>
T& get ()
{
static T v = T();
return v;
}
struct A
{
template <class T>
operator const T& () const {
return get<T>();
}
};
int main ()
{
A a;
(int)a;
return 0;
}
"t.cpp", line 20.10: 1540-0216 (S) An expression of type "A" cannot be
converted to type "int".
Making an explicit call to `a.operator const int& ()' works, as does a cast to
`const int&' before the cast to `int'. It appears that the compiler isn't
seeing that it can get an `int' by applying one of the conversion operators.
Possible workarounds are to explicitly call the conversion operator, do an
additional cast, or change the conversion operator to be an exact match. i.e.
`operator T () const'.
> [IBM XLC++] errors compiling dynatype.cpp
> -----------------------------------------
>
> Key: STDCXX-605
> URL: https://issues.apache.org/jira/browse/STDCXX-605
> Project: C++ Standard Library
> Issue Type: Bug
> Components: Examples
> Affects Versions: 4.2.0
> Environment: XLC++ 6.0 through 9.0/AIX 5.3
> Reporter: Martin Sebor
> Assignee: Travis Vitek
> Fix For: 4.2.1
>
>
> The dynatype.cpp example program fails to compile with IBM XLC++ 9.0 on AIX
> with ethe following errors:
> xlCcore_r -c -I$(TOPDIR)/include/ansi -I$(TOPDIR)/include
> -I$(BUILDDIR)/include -I$(TOPDIR)/examples/include -O -Q
> -qtemplateregistry=dynatype.ti $(TOPDIR)/examples/tutorial/dynatype.cpp
> "$(TOPDIR)/examples/tutorial/dynatype.cpp", line 203.27: 1540-0216 (S) An
> expression of type "dynatype" cannot be converted to type "int".
> "$(TOPDIR)/examples/tutorial/dynatype.cpp", line 209.30: 1540-0216 (S) An
> expression of type "dynatype" cannot be converted to type "double".
> "$(TOPDIR)/examples/tutorial/dynatype.cpp", line 215.30: 1540-0216 (S) An
> expression of type "dynatype" cannot be converted to type "double".
> "$(TOPDIR)/examples/tutorial/dynatype.cpp", line 222.35: 1540-0216 (S) An
> expression of type "dynatype" cannot be converted to type "const char *".
> "$(TOPDIR)/examples/tutorial/dynatype.cpp", line 228.35: 1540-0216 (S) An
> expression of type "dynatype" cannot be converted to type "const char *".
> "$(TOPDIR)/examples/tutorial/dynatype.cpp", line 238.28: 1540-0216 (S) An
> expression of type "dynatype" cannot be converted to type "char".
> gmake: *** [dynatype.o] Error 1
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