David Crayford wrote:
On 10/08/2018 7:34 PM, Peter Relson wrote:
I have no idea why the health checker header files in
SYS1.SIEAHDR.H(HZS*) chose to use them.
Because no one was willing to take a stand that everyone has a system
like
yours that can handle the braces, at the expense of someone who did not.
You make a good point Peter and I certainly don't mean any disrespect
to the original authors of those header files.
It's just IMO trigraphs are worse then using a codepage such as 1047
which is the ubiquitous C codepage on z/OS.
Nevertheless, it seems unlikely that there will be additional use of the
#pragma codepage presents its on set of problems.
Consider, for instance, you move the source into a Git repository
on a remote (and ASCII) system. And, if you have a cross-compiler,
might consider compiling on that remote system.
Now, your source claims to be in code-page 1047 - but it certainly isn't
likely
to be so, since the move to the ASCII system rendered it in ASCII.
This means your cross-compiler has to quietly ignore the #pragma codepage
and hope that your transmission to the ASCII system did "the right thing."
Trigraphs are hideously ugly; but they did produce portable source files
that could be moved around and compiled.
As I mentioned in another post; C++17 removed support for Trigraphs
from their language definition.... so, they are generally going away...
- Dave R. -
--
riv...@dignus.com Work: (919) 676-0847
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