handy.h: Create isALPHANUMERIC() and kin

Perl has had an undocumented macro isALNUMC() for a long time.  I want
to document it, but the name is very obscure.  Neither Yves nor I are
sure what it is.  My best guess is "C's alnum".  It corresponds to
/[[:alnum:]]/, and so its best name would be isALNUM().  But that is the
name long given to what matches \w.  A new synonym, isWORDCHAR(), has
been in place for several releases for that, but the old isALNUM()
should remain for backwards compatibility.

I don't think that the name isALNUMC() should be published, as it is too
close to isALNUM().  I finally came to the conclusion that
isALPHANUMERIC() is the best name; it describes its purpose clearly; the
disadvantage is its long length.  I doubt that it will get much use, but
we need something, I think, that we can publish to accomplish this
functionality.

This commit also converts core uses of isALNUMC to isALPHANUMERIC.  (I
intended to that separately, but made a mistake in rebasing, and
combined the two patches; and it seemed like not a big enough problem to
separate them out again.)

1 files changed, 1 insertions, 1 deletions

diff --git a/pp_hot.c b/pp_hot.c
index 64f8406b89..33f8669e35 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -1813,7 +1813,7 @@ Perl_do_readline(pTHX)
 		}
 	    }
 	    for (t1 = SvPVX_const(sv); *t1; t1++)
-		if (!isALNUMC(*t1) &&
+		if (!isALPHANUMERIC(*t1) &&
 		    strchr("$&*(){}[]'\";\\|?<>~`", *t1))
 			break;
 	    if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {