Re: Hex Values

[Jamie Langston <jlangston@xxxxxxxxxxxxxxxx>]

Oh, yes, I understand the problem, and why it's done that way, I just always 
get confused
with how many quotes I need.  I remember one time writing a program in one 
langauge to
display a string and I would keep adding quotes and seeing how many came out.

'''' would show ', ''''' would either show me 1 or give me an error, '''''' 
would show me 2, etc...

I actually have written a few parsers for myself, although I have yet to create 
the parser
I want to, a free text parser to understand human speech.  I guess this would 
be the Holy
Grail of parsers, and a requirement for a true AI system.







Joep Beckeringh wrote:

> Jim,
>
> If you ever write some sort of parsing routine, you'll understand the
> problem.  When some character has a special meaning, like the quote as
> string delimiter, (or the backslash in C, or '<' and '>' in HTML), you can't
> use that character normally in a string.  If you need to use that character
> in its 'normal' sense, you have to have some way of 'escaping' the parsing.
> In RPG and CL you have to use two quotes when you want to have a quote in a
> string, just like you have to use '\\' in C if you want a backslash in a
> string.  But it can get very ugly if the string has to pass through a few
> interpretation layers (try to build a command string in RPG for OPNQRYF with
> some concatenation for the QRYSLT parameter).
>
> Joep Beckeringh
>
> ----- Original Message -----
> From: "Jim Langston" <jlangston@conexfreight.com>
> To: <RPG400-L@midrange.com>
> Sent: Friday, August 11, 2000 5:16 PM
> Subject: Re: Hex Values
>
> > This always confused me too.  If you want a quote in text, such as:
> 'Joe''s' you use 2 appostrophies.
> > To get single quote in a text alone, take out the letters and you get ''''
> 4 of them.  I would suspect your
> > '' gives you a compile time error.
> >
> > Regards,
> >
> > Jim Langston
>
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