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Scheme Programming Language

expression to string how?


hi

Is it possible to have the string for "(display exp)"?
Also need to do regular expression on string. like unix sed.
thanks.

On Fri, 12 Apr 2007, dillog@gmail.com wrote:
> hi

> Is it possible to have the string for "(display exp)"?

???

> Also need to do regular expression on string. like unix sed.
> thanks.

Did you do this first?
http://www.google.com/search?hl=en&safe=off&client=opera&rls=en&hs=m2...

dillog@gmail.com wrote:
> hi

> Is it possible to have the string for "(display exp)"?

If I understand you correctly, string ports
(SRFI 6-- http://srfi.schemers.org/srfi-6/srfi-6.html ) should do this
if it's supported by your implementation.

> Also need to do regular expression on string. like unix sed.
> thanks.

This is probably more implementation-specific.  For example, Scheme 48
provides access to the underlying POSIX regexp facilities
( http://www.s48.org/1.6/manual/manual-Z-H-11.html#node_sec_9.9 ).

But depending on what you're doing with regular expressions, it might
actually be easier to hand-code a lexer and parser with something like
Essence ( http://www.informatik.uni-freiburg.de/proglang/software/essence/ ).
--
Darren Bane

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