-----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of David Crayford Sent: Friday, February 3, 2023 3:14 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Open XL C++ debugging
On 2/2/23 21:25, Joseph Reichman wrote: > Thanks > > First off, I am assembler programmer by trade I did learn C/C++ doing some > TCP/IP stuff from an Assembler Server Started task. There's a skill to reading documentation. For XL C++ C++11 compatability see https://www.ibm.com/docs/en/zos/2.3.0?topic=xcle-c11-compatibility. Note that the C++ standard library is *not* mentioned. We'll get to that later. > > It would display the data program listing from a sysadata on Windows. Why? Are you writing a GUI? I can understand you wanting to use an IDE as opposed to ISPF but why run anything on Windows that can run on z/OS? > I would like to use that code on z/os. > > If you say clang, is the way to go okay. > > You also say use the clang compiler instead of MSVC I hope I don’t end up > with a millon more compile errors using clang as everything compiles cleanly > using MSVC. How can you write a cross platform program using MSVC++ without having to resort to #ifdef pre-processor nonsense? That's just bonkers. > > I debug under Unix. You are not making any sense. You want to edit/compile/run on windows and then debug on Unix? What Unix, z/OS Unix? > > Since I am going to run this from z/os its going to be LE with runtime option > POSIX(ON) ? right ? > > Now as far as the doc for OPEN XL C++ > > I got a compile error using map::insert invalid call. > > CCN5218 (S) The call does not match any parameter list for "insert". > > Is referenced the following statement. > auto ret = procpointer->extsymcollector->insert({ *s, *exsympointer }); You are attempting to insert a record using an rvalue-reference with an initializer list. That's not supported by the XL C++ standard library which does not support C++11. I already told you that two posts back. The function prototype is like so: template< class P > std::pair<iterator, bool> insert( P&& value ); Check the doc https://en.cppreference.com/w/cpp/container/map/insert The Documentation in the above link is from CPP reference which it would seem that the IBM XL C++ 2.4 compiler doesn’t support that level These are the methods I see supported from XL C++ template library guide pair<iterator, bool> insert(const value_type& x); iterator insert(iterator it, const value_type& x); template<class InIt> void insert(InIt first, InIt last); If It only can accommodate a rvalue that is it very limited in scope as you can tell I am not C++ expert but an rvalue is only literal or a function that would return the specified type If XL C++ is into at C++ 11 at what level is it thanks > the compiler initially gave me a problem with '{' > > I took it out. > > auto ret = procpointer->extsymcollector->insert( *s, *exsympointer ); > That's also wrong. You need to pass a single lvalue-reference such as std::pair (please read the docs). auto ret = procpointer->extsymcollector->insert( std::pair(*s, *exsympointer) ); I'm not picking holes but the code snippet you posted concerns me. It's heavy on pointers and the de-referencing alone makes me think it's poor quality. C++ is not C, it has reference types which are absolutely essential for RAII. If you have found you are using raw pointers allocated with "new" then that's a code smell. > then I got the above error > > My question is if I got to Open XL C++ > > Regarding documentation for let's say map::inset I would reference Clang/LLVM > link you sent me earlier. > > > I hope I don’t open a pandoras box if I change to clang and re-compile all my > windows code. The question you should be asking yourself is "should I use C++?". C++ is a large and complex language and in my experience with colleagues of mine who are excellent assembler programmers it can be a struggle to become proficient. Why don't you use a simpler language like Python which is easy to use and doesn't have portability issues? I'm an experienced C/C++ programmer and I certainly wouldn't entertain using C++ to process ADATA, when I can do it faster, with less code and less bugs in Python. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
