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https://issues.apache.org/jira/browse/STDCXX-605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12549616
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Martin Sebor commented on STDCXX-605:
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I assume (1) is because of the compiler bug?
For (2) yes, if we can't have static_cast<T>(v) because of the XLC++ bug I'd
rather see static_cast<const T&>(v). The problem, as I understand it, is that
we're invoking the conversion operator on a non-const dynatype object and thus
operator T&() rather than operator const T&() const is being invoked. I wonder
if there's a way to detect that the caller is invoking a const T& cast and
dispatch to a const member function instead...
(3) Yes. I'm saying I think the output of the example should match the code
(and use '\n' instead of std::endl).
(4) We should try. Is the difference due to unspecified behavior or another
compiler bug? (Have fun reading the relevant sections of the standard! ;-)
> [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
>
> Attachments: stdcxx-605.patch
>
>
> 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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