Re: Line continuation characters

* Randal L. Schwartz <[email protected]>:
> Ted> Because Marc's grammar seems to be otherwise line-oriented, I'd
> Ted> suggest preprocessing the grammar input to merge lines as needed, to
> Ted> simplify the grammar.  The major disadvantage would be that line
> Ted> numbers would be off when reporting errors though.
> 
> "line oriented grammar" => "requires preprocessing" doesn't seem to be
> very supportable logic.  There's nothing inherent in P::RD that
> requires the grammar to be non-line-oriented.
> 
> Now "metagrammar can appear within tokens" implies a need for a
> preprocessing layer.  But from what I saw for examples, the
> metagrammar (line continuation) appears only outside of tokens, so
> that means it can be built into the skip matching logic.
> 
> Don't overcomplicate the design... until you have to. :)

I'm *attempting* to convert some old IBM System/36 Operation
Control Language (OCL) procedures to a somewhat newer language,
CL.  Both languages are line oriented.  OCL is interpreted, while
CL is compiled.

I took Ted's suggestion for expediency while I get a handle on
the grammar.  (I have been unable to find any BNF description for
either language.)  I did so because I was unable to find a way to
get the skip directive you provided earlier to work:

   <skip: '(?:[ \t]+|\+\n)+'> commandline /\n/

Ken <[email protected]> responded similarly.

	-Marc