Re: help with parsing and dcg (swi-prolog in particular)

Brian Hulley wrote:
> blindsearch wrote:
> > I don't think a single list could handle it. The file I was reading
> in
> > was 2.5mb, there were 8199 frames.
>

You could also modify the convert_file_to_list predicate so that it
counted parentheses - when the opening bracket is closed, you stop
reading from the file and return the list which should contain the
chars for a single concept (assuming the original file is bracketed
correctly, which from your first post seemed to be the case)

Thus your main loop would be something like:

go :-
see(File),
get_byte(Char),
start_with(Char).

start_with(-1) :- seen. % end of file
start_with(Char) :-
get_next_concept_list(Char,List,NextChar),
phrase(concept(Concept), List, Remainder), % ignore remainder (?)
write(Concept),nl,
start_with(NextChar).

Garbage collection will ensure that you don't run out of space in this
kind of loop (using tail recursion).

Regards, Brian.

.

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