Checked the book. Indeed, in order "To enable C++ comments in C, you must compile with c99, or with the SSCOMM or LANGLVL(STDC99) or LANGLVL(EXTC99) options." So you could do it but it requires a specific compile option. Not a good idea!
I would stick to the policy of avoiding C++ style comments.
Ze'ev Atlas
________________________________
From: Ze'ev Atlas <zatlas1@???>
To: pcre exim <pcre-dev@???>
Sent: Wednesday, October 17, 2012 11:44 AM
Subject: [pcre-dev] Fw: [Bug 1295] add 32-bit library
>C++ style comments: I have avoided using these just in case somebody
>with a non-C++ compiler wants to compile it. (I have no idea, for
>example, if the z/OS compiler recognizes C++ comments.)
I will check the z/OS-z/VM compiler and let you know, but it should work since it IS a C/C++ compiler (believe it or not but the good Ol' mainframe does have all the new technologies like C++, DLL, POSIX style UNIX services at al). The VM was actually invented here :)
Ze'ev Atlas
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