Ralph Corderoy <ra...@inputplus.co.uk> wrote (Fri, 07 Nov 2014 16:16:38
+0000):
> Hi Holger,
>
> > Due to the 'Troff User's Manual' page 24 and the man 7 groff
> > (missing a negation)
>
> What's missing?
"I" -- I was missing .. ;)
> > the statement:
> >
> > .if 'str1'str2' anything
> >
> > cannot handle regular expressions or kinda glob-ing as patterns?
Ok, that makes no sense, 'cause of the strings are processed by groff.
> Correct. It's not a simple string compare though, groff's info manual
> explains more.
>
> info groff 2>/dev/null |
> sed -n '/Node: Operators in Conditionals/,/^File:/p'
>
> You can get close with De Morgans to turn a|b into !(!a&!b) and chain
> two .ifs to do the & with the first being a .ie so the .el mops up,
> but it misses one of the cases.
A nested .if-statement will have two .el-parts, containing the same
code. I wanted to avoid that. However, a De Morgan of the original OR I
posted first will do.
But how about to code a statement like:
.if 'str'pattern1'pattern2' anything
maybe
.if 'str'pattern1'pattern2'..'patternN' anything
?
May someone help me to direct me to the place where the .if-statements
for string comparison are located. I'm a bit new to the sources (and
had problems to grep for "if"). Do I have to look at the .m4-files?
Thanks Holger
