Prolog "compare"
/**
* Prolog code for the structure lexical theory test cases.
*
* Source of test cases are the following standards:
* - Prolog General Core ISO/IEC 13211-1
* - Draft Technical Corrigendum 2, WG17, Ulrich Neumerkel
* <a href="https://www.complang.tuwien.ac.at/ulrich/iso-prolog/dtc2">www.complang.tuwien.ac.at/ulrich/iso-prolog/dtc2</a>
*
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* 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.
*
* Rights & License
* 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
* excerpts, XLOG Technologies AG has at least obtained the right to
* 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.
*
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies AG.
*/
runner_file(structure, compare, 'ISO 8.4.1 lexical').
/****************************************************************/
/* Lexical Comparison */
/****************************************************************/
/* X == Y */
runner_pred(==, 2, structure, compare, 'ISO 8.4.1.4').
runner_case(==, 2, structure, compare, 'ISO 8.4.1.4, ISO 13') :-
X == X.
runner_case(==, 2, structure, compare, 'ISO 8.4.1.4, ISO 15') :-
\+ _ == _.
runner_case(==, 2, structure, compare, 'ISO 8.2.1.4, XLOG 1') :-
\+ 1 == 2.
runner_case(==, 2, structure, compare, 'ISO 8.2.1.4, XLOG 2') :-
\+ g(X) == f(f(X)).
runner_case(==, 2, structure, compare, 'ISO 8.4.1.4, XLOG 3') :-
\+ current_prolog_flag(dialect, gprolog),
X = f(g(X,A),B), Y = g(f(Y,B),A), Z = f(Y,B),
X == Z.
runner_case(==, 2, structure, compare, 'ISO 8.4.1.4, XLOG 4') :-
\+ current_prolog_flag(dialect, gprolog),
X = f(f(f(X,A),A),A), Y = f(f(Y,A),A),
X == Y.
/* X \== Y */
runner_pred(\==, 2, structure, compare, 'ISO 8.4.1.4').
runner_case(\==, 2, structure, compare, 'ISO 8.4.1.4, ISO 3') :-
\+ 1 \== 1.
runner_case(\==, 2, structure, compare, 'ISO 8.4.1.4, ISO 16') :-
_ \== _.
runner_case(\==, 2, structure, compare, 'ISO 8.4.1.4, XLOG 1') :-
\+ current_prolog_flag(dialect, gprolog),
X = g(X), Y = f(Y), Z = g(Y),
X \== Z.
/****************************************************************/
/* Object Predicates */
/****************************************************************/
/* same_term(X, H) */
runner_pred(same_term,2, structure, compare, 'XLOG 3.2.7').
runner_case(same_term,2, structure, compare, 'XLOG 3.2.7, XLOG 1') :-
X = f(_), Y = f(_), \+ same_term(X, Y).
runner_case(same_term,2, structure, compare, 'XLOG 3.2.7, XLOG 2') :-
X = f(_), Y = X, same_term(X, Y).
/* hash_code(X, H) */
runner_pred(hash_code,2, structure, compare, 'XLOG 3.2.8').
runner_case(hash_code,2, structure, compare, 'XLOG 3.2.8, XLOG 1') :-
X = f(_), Y = X, hash_code(X, H), hash_code(Y, J),
H == J.
runner_case(hash_code,2, structure, compare, 'XLOG 3.2.8, XLOG 2') :-
X is pi, hash_code(X, H),
H == 340593891.
runner_case(hash_code,2, structure, compare, 'XLOG 3.2.8, XLOG 3') :-
X = 'abc', hash_code(X, H),
H == 96354.
runner_case(hash_code,2, structure, compare, 'XLOG 3.2.8, XLOG 4') :-
X is 2^40-1, hash_code(X, H),
H == 7904.
runner_case(hash_code,2, structure, compare, 'XLOG 3.2.8, XLOG 5') :-
current_input(C), hash_code(C, X),
integer(X).