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grow/shrink as DCGs.

This commit is contained in:
Simon Forman 2019-08-07 23:28:28 -07:00
parent 4ea77cf1be
commit 976b8302be
1 changed files with 2 additions and 2 deletions
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thun/thun.pl
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@ -313,8 +313,8 @@ to_fixed_point(DCG, Ei, Eo) :-
phrase(DCG, Ei, E), % Apply DCG...
(Ei=E -> Eo=E ; to_fixed_point(DCG, E, Eo)). % ...until a fixed-point is reached.
grow(Ei, Eo) :- to_fixed_point(rebo(expando, grow ), Ei, Eo).
shrink(Ei, Eo) :- to_fixed_point(rebo(contracto, shrink), Ei, Eo).
grow --> to_fixed_point(rebo(expando, grow )).
shrink --> to_fixed_point(rebo(contracto, shrink)).
% format_n(N) --> {number(N), !, number_codes(N, Codes)}, Codes.