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/**
* Prolog code for the naïve reverse benchmark.
*
* This is the benchmark of page 219 of:
* Warren, D.H.D. (1983): Applied Logic - Its Use and
* Implementation as a Programming Tool,
* Technical Note 290, SRI International, 1983
*
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* otherwise agreed upon, XLOG Technologies AG makes no warranties
* regarding the provided information. XLOG Technologies AG assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies AG.
*
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* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies AG. If the company was not the originator of some
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* reproduce, change and translate the information.
*
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
*
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
*
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*/
/*****************************************************************/
/* Normal Test Cases */
/*****************************************************************/
% nrev
nrev :- datanrev(X), rev(X, _).
% datanrev(-List)
datanrev([1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,
21,22,23,24,25,26,27,28,29,30]).
/*****************************************************************/
/* The Predicates */
/*****************************************************************/
% rev(+List, -List)
rev([], []).
rev([X|Rest], Ans) :- rev(Rest, L), concatenate(L, [X], Ans).
% concatenate(+List, +List, -List)
concatenate([], L, L).
concatenate([X|L1], L2, [X|L3]) :- concatenate(L1, L2, L3).