Fixes are available
APAR status
Closed as program error.
Error description
An implicit template instantiation with explicit specialization, using a pointer to a function with a default parameter is encountering an invalid error during compile. ===== TEST CASE ===== template <typename T> struct myTemplate { typedef T type; }; template <typename T> struct myTemplate<T *> { typedef T type; }; void defaultarg(int = 0); template <typename T> void templateFunction(T) { typedef typename myTemplate<T>::type template_type; } void test() { templateFunction(&defaultarg); } $ xlC -c test.cpp 1540-1111 (S) Only function declarations can have default arguments. "test.cpp", line 12.13: 1540-0700 (I) The previous message was produced while processing "struct myTemplate<void (*)(int)>". "test.cpp", line 10.6: 1540-0700 (I) The previous message was produced while processing "templateFunction<void (*)(int)>(void (*)(int))". "test.cpp", line 17.9: 1540-0700 (I) The previous message was produced while processing "test()". $
Local fix
The issue can be worked around by using an explicit template instantiation.
Problem summary
PROBLEM DESCRIPTION: Template argument deduction including default arguments in an invalid context. USERS AFFECTED: The problem is specific to the use of argument deduction when passing a function type to a template function, where the function type has a default argument.
Problem conclusion
The problem has been resolved.
Temporary fix
Comments
APAR Information
APAR number
LI77444
Reported component name
XL C/C++ FOR LI
Reported component ID
5724X1400
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2013-06-11
Closed date
2013-06-11
Last modified date
2013-06-11
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
XL C/C++ FOR LI
Fixed component ID
5724X1400
Applicable component levels
RB10 PSN IV33204
UP06/09/13
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSXVZZ","label":"XL C\/C++ for Linux"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B10","Line of Business":{"code":"LOB57","label":"Power"}}]
Document Information
Modified date:
14 October 2021