764 lines
32 KiB
Rust
764 lines
32 KiB
Rust
extern crate termion;
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mod prolog;
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use prolog::io::*;
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use prolog::machine::*;
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#[cfg(test)]
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mod tests {
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use super::*;
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use prolog::codegen::*;
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fn submit(wam: &mut Machine, buffer: &str) -> bool {
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wam.reset();
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match parse_code(buffer.trim()) {
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Some(tl) =>
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match eval(wam, &tl) {
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EvalSession::InitialQuerySuccess(_, _) |
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EvalSession::EntrySuccess |
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EvalSession::SubsequentQuerySuccess =>
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true,
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_ => false
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},
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None => panic!("Grammatical error of some kind!")
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}
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}
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#[test]
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fn test_queries_on_facts() {
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let mut wam = Machine::new();
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submit(&mut wam, "p(Z, Z).");
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submit(&mut wam, "clouds(are, nice).");
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// submit returns true on failure, false on success.
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assert_eq!(submit(&mut wam, "?- p(Z, Z)."), true);
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assert_eq!(submit(&mut wam, "?- p(Z, z)."), true);
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assert_eq!(submit(&mut wam, "?- p(Z, w)."), true);
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assert_eq!(submit(&mut wam, "?- p(z, w)."), false);
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assert_eq!(submit(&mut wam, "?- p(w, w)."), true);
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assert_eq!(submit(&mut wam, "?- clouds(Z, Z)."), false);
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assert_eq!(submit(&mut wam, "?- clouds(are, Z)."), true);
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assert_eq!(submit(&mut wam, "?- clouds(Z, nice)."), true);
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assert_eq!(submit(&mut wam, "?- p(Z, h(Z, W), f(W))."), false);
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submit(&mut wam, "p(Z, h(Z, W), f(W)).");
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assert_eq!(submit(&mut wam, "?- p(z, h(z, z), f(w))."), false);
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assert_eq!(submit(&mut wam, "?- p(z, h(z, w), f(w))."), true);
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assert_eq!(submit(&mut wam, "?- p(z, h(z, W), f(w))."), true);
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assert_eq!(submit(&mut wam, "?- p(Z, h(Z, w), f(Z))."), true);
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assert_eq!(submit(&mut wam, "?- p(z, h(Z, w), f(Z))."), false);
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submit(&mut wam, "p(f(X), h(Y, f(a)), Y).");
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assert_eq!(submit(&mut wam, "?- p(Z, h(Z, W), f(W))."), true);
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}
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#[test]
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fn test_queries_on_rules() {
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let mut wam = Machine::new();
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submit(&mut wam, "p(X, Y) :- q(X, Z), r(Z, Y).");
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submit(&mut wam, "q(q, s).");
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submit(&mut wam, "r(s, t).");
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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assert_eq!(submit(&mut wam, "?- p(q, t)."), true);
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assert_eq!(submit(&mut wam, "?- p(t, q)."), false);
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assert_eq!(submit(&mut wam, "?- p(q, T)."), true);
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assert_eq!(submit(&mut wam, "?- p(Q, t)."), true);
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assert_eq!(submit(&mut wam, "?- p(t, t)."), false);
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submit(&mut wam, "p(X, Y) :- q(f(f(X)), R), r(S, T).");
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submit(&mut wam, "q(f(f(X)), r).");
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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submit(&mut wam, "q(f(f(x)), r).");
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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submit(&mut wam, "p(X, Y) :- q(X, Y), r(X, Y).");
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submit(&mut wam, "q(s, t).");
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submit(&mut wam, "r(X, Y) :- r(a).");
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submit(&mut wam, "r(a).");
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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assert_eq!(submit(&mut wam, "?- p(t, S)."), false);
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assert_eq!(submit(&mut wam, "?- p(t, s)."), false);
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assert_eq!(submit(&mut wam, "?- p(s, T)."), true);
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assert_eq!(submit(&mut wam, "?- p(S, t)."), true);
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submit(&mut wam, "p(f(f(a), g(b), X), g(b), h) :- q(X, Y).");
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submit(&mut wam, "q(X, Y).");
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assert_eq!(submit(&mut wam, "?- p(f(X, Y, Z), g(b), h)."), true);
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assert_eq!(submit(&mut wam, "?- p(f(X, g(Y), Z), g(Z), X)."), false);
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assert_eq!(submit(&mut wam, "?- p(f(X, g(Y), Z), g(Z), h)."), true);
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assert_eq!(submit(&mut wam, "?- p(Z, Y, X)."), true);
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assert_eq!(submit(&mut wam, "?- p(f(X, Y, Z), Y, h)."), true);
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submit(&mut wam, "p(_, f(_, Y, _)) :- h(Y).");
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submit(&mut wam, "h(y).");
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assert_eq!(submit(&mut wam, "?- p(_, f(_, Y, _))."), true);
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assert_eq!(submit(&mut wam, "?- p(_, f(_, y, _))."), true);
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assert_eq!(submit(&mut wam, "?- p(_, f(_, z, _))."), false);
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}
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#[test]
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fn test_queries_on_predicates() {
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let mut wam = Machine::new();
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submit(&mut wam, "p(X, a). p(b, X).");
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assert_eq!(submit(&mut wam, "?- p(x, Y)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, a)."), true);
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assert_eq!(submit(&mut wam, "?- p(b, X)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, X)."), true);
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assert_eq!(submit(&mut wam, "?- p(b, a)."), true);
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assert_eq!(submit(&mut wam, "?- p(a, b)."), false);
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submit(&mut wam, "p(X, Y, a). p(X, a, Y). p(X, Y, a).");
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assert_eq!(submit(&mut wam, "?- p(c, d, X)."), true);
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assert_eq!(submit(&mut wam, "?- p(a, a, a)."), true);
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assert_eq!(submit(&mut wam, "?- p(b, c, d)."), false);
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submit(&mut wam, "p(X, a). p(X, Y) :- q(Z), p(X, X).");
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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assert_eq!(submit(&mut wam, "?- p(x, a)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, a)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, b)."), false);
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submit(&mut wam, "q(z).");
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assert_eq!(submit(&mut wam, "?- p(X, b)."), true);
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assert_eq!(submit(&mut wam, "?- p(x, a)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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submit(&mut wam, "p(X, a). p(X, Y) :- q(Y), p(X, X).");
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, b)."), false);
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submit(&mut wam, "p(a, z). p(X, Y) :- q(Y), p(X, Y).");
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assert_eq!(submit(&mut wam, "?- p(X, Y)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, z)."), true);
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assert_eq!(submit(&mut wam, "?- p(a, z)."), true);
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assert_eq!(submit(&mut wam, "?- p(a, X)."), true);
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assert_eq!(submit(&mut wam, "?- p(b, a)."), false);
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submit(&mut wam, "p(X, Y, Z) :- q(X), r(Y), s(Z).
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p(a, b, Z) :- q(Z).");
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submit(&mut wam, "q(x).");
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submit(&mut wam, "r(y).");
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submit(&mut wam, "s(z).");
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assert_eq!(submit(&mut wam, "?- p(X, Y, Z)."), true);
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assert_eq!(submit(&mut wam, "?- p(a, b, c)."), false);
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assert_eq!(submit(&mut wam, "?- p(a, b, C)."), true);
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submit(&mut wam, "p(X) :- q(X). p(X) :- r(X).");
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submit(&mut wam, "q(X) :- a.");
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submit(&mut wam, "r(X) :- s(X, t). r(X) :- t(X, u).");
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submit(&mut wam, "s(x, t).");
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submit(&mut wam, "t(y, u).");
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assert_eq!(submit(&mut wam, "?- p(X)."), true);
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assert_eq!(submit(&mut wam, "?- p(x)."), true);
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assert_eq!(submit(&mut wam, "?- p(y)."), true);
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assert_eq!(submit(&mut wam, "?- p(z)."), false);
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submit(&mut wam, "p(f(f(X)), h(W), Y) :- g(W), h(W), f(X).
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p(X, Y, Z) :- h(Y), g(W), z(Z).");
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submit(&mut wam, "g(f(X)) :- z(X). g(X) :- h(X).");
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submit(&mut wam, "h(w). h(x). h(z).");
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submit(&mut wam, "f(s).");
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submit(&mut wam, "z(Z).");
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assert_eq!(submit(&mut wam, "?- p(X, Y, Z)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, X, Z)."), true);
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assert_eq!(submit(&mut wam, "?- p(f(f(Z)), Y, Z)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, X, X)."), true);
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assert_eq!(submit(&mut wam, "?- p(X, Y, X)."), true);
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assert_eq!(submit(&mut wam, "?- p(f(f(X)), h(f(X)), Y)."), false);
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submit(&mut wam, "p(X) :- f(Y), g(Y), i(X, Y).");
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submit(&mut wam, "g(f(a)). g(f(b)). g(f(c)).");
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submit(&mut wam, "f(f(a)). f(f(b)). f(f(c)).");
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submit(&mut wam, "i(X, X).");
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assert_eq!(submit(&mut wam, "?- p(X)."), true);
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submit(&mut wam, "p(X) :- f(f(Y)), g(Y, f(Y)), i(X, f(Y)).");
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submit(&mut wam, "g(Y, f(Y)) :- g(f(Y)).");
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assert_eq!(submit(&mut wam, "?- p(X)."), true);
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}
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#[test]
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fn test_queries_on_cuts() {
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let mut wam = Machine::new();
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// test shallow cuts.
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submit(&mut wam, "memberchk(X, [X|_]) :- !.
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memberchk(X, [_|Xs]) :- memberchk(X, Xs).");
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assert_eq!(submit(&mut wam, "?- memberchk(X, [a,b,c])."), true);
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assert_eq!(submit(&mut wam, "?- memberchk([X,X], [a,b,c,[d,e],[d,d]])."), true);
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assert_eq!(submit(&mut wam, "?- memberchk([X,X], [a,b,c,[D,d],[e,e]])."), true);
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assert_eq!(submit(&mut wam, "?- memberchk([X,X], [a,b,c,[e,d],[f,e]])."), false);
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assert_eq!(submit(&mut wam, "?- memberchk([X,X,Y], [a,b,c,[e,d],[f,e]])."), false);
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assert_eq!(submit(&mut wam, "?- memberchk([X,X,Y], [a,b,c,[e,e,d],[f,e]])."), true);
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// test deep cuts.
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submit(&mut wam, "commit :- a, !.");
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assert_eq!(submit(&mut wam, "?- commit."), false);
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submit(&mut wam, "a.");
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assert_eq!(submit(&mut wam, "?- commit."), true);
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submit(&mut wam, "commit(X) :- a(X), !.");
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assert_eq!(submit(&mut wam, "?- commit(X)."), false);
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submit(&mut wam, "a(x).");
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assert_eq!(submit(&mut wam, "?- commit(X)."), true);
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submit(&mut wam, "a :- b, !, c. a :- d.");
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assert_eq!(submit(&mut wam, "?- a."), false);
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submit(&mut wam, "b.");
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assert_eq!(submit(&mut wam, "?- a."), false);
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submit(&mut wam, "d.");
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// we've committed to the first clause since the query on b
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// succeeds, so we expect failure here.
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assert_eq!(submit(&mut wam, "?- a."), false);
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submit(&mut wam, "c.");
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assert_eq!(submit(&mut wam, "?- a."), true);
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submit(&mut wam, "a(X) :- b, !, c(X). a(X) :- d(X).");
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assert_eq!(submit(&mut wam, "?- a(X)."), false);
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submit(&mut wam, "c(c).");
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submit(&mut wam, "d(d).");
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assert_eq!(submit(&mut wam, "?- a(X)."), true);
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submit(&mut wam, "b.");
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assert_eq!(submit(&mut wam, "?- a(X)."), true);
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wam.clear();
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assert_eq!(submit(&mut wam, "?- c(X)."), false);
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submit(&mut wam, "a(X) :- b, c(X), !. a(X) :- d(X).");
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submit(&mut wam, "b.");
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assert_eq!(submit(&mut wam, "?- a(X)."), false);
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submit(&mut wam, "d(d).");
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assert_eq!(submit(&mut wam, "?- a(X)."), true);
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submit(&mut wam, "c(c).");
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assert_eq!(submit(&mut wam, "?- a(X)."), true);
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}
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#[test]
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fn test_queries_on_lists() {
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let mut wam = Machine::new();
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submit(&mut wam, "p([Z, W]).");
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assert_eq!(submit(&mut wam, "?- p([Z, Z])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z, W, Y])."), false);
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assert_eq!(submit(&mut wam, "?- p([Z | W])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z | [Z]])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z | [W]])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z | []])."), false);
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submit(&mut wam, "p([Z, Z]).");
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assert_eq!(submit(&mut wam, "?- p([Z, Z])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z, W, Y])."), false);
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assert_eq!(submit(&mut wam, "?- p([Z | W])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z | [Z]])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z | [W]])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z | []])."), false);
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submit(&mut wam, "p([Z]).");
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assert_eq!(submit(&mut wam, "?- p([Z, Z])."), false);
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assert_eq!(submit(&mut wam, "?- p([Z, W, Y])."), false);
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assert_eq!(submit(&mut wam, "?- p([Z | W])."), true);
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assert_eq!(submit(&mut wam, "?- p([Z | [Z]])."), false);
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assert_eq!(submit(&mut wam, "?- p([Z | [W]])."), false);
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assert_eq!(submit(&mut wam, "?- p([Z | []])."), true);
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submit(&mut wam, "member(X, [X|Xs]).
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member(X, [Y|Xs]) :- member(X, Xs).");
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assert_eq!(submit(&mut wam, "?- member(a, [c, [X, Y]])."), false);
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assert_eq!(submit(&mut wam, "?- member(c, [a, [X, Y]])."), false);
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assert_eq!(submit(&mut wam, "?- member(a, [a, [X, Y]])."), true);
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assert_eq!(submit(&mut wam, "?- member(a, [X, Y, Z])."), true);
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assert_eq!(submit(&mut wam, "?- member([X, X], [a, [X, Y]])."), true);
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assert_eq!(submit(&mut wam, "?- member([X, X], [a, [b, c], [b, b], [Z, x], [d, f]])."), true);
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assert_eq!(submit(&mut wam, "?- member([X, X], [a, [b, c], [b, d], [foo, x], [d, f]])."), false);
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assert_eq!(submit(&mut wam, "?- member([X, Y], [a, [b, c], [b, b], [Z, x], [d, f]])."), true);
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assert_eq!(submit(&mut wam, "?- member([X, Y, Y], [a, [b, c], [b, b], [Z, x], [d, f]])."), false);
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assert_eq!(submit(&mut wam, "?- member([X, Y, Z], [a, [b, c], [b, b], [Z, x], [d, f]])."), false);
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}
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#[test]
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fn test_queries_on_indexed_predicates() {
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let mut wam = Machine::new();
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submit(&mut wam, "p(a) :- a.
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p(b) :- b, f(X).
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p(c) :- c, g(X).
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p(f(a)) :- a.
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p(g(b, c)) :- b.
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p(g(b)) :- b.
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p([a|b]) :- a.
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p([]).
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p(X) :- x.
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p([c, d, e]).");
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assert_eq!(submit(&mut wam, "?- p(a)."), false);
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assert_eq!(submit(&mut wam, "?- p(b)."), false);
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assert_eq!(submit(&mut wam, "?- p(c)."), false);
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assert_eq!(submit(&mut wam, "?- p(f(a))."), false);
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assert_eq!(submit(&mut wam, "?- p(g(b, X))."), false);
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assert_eq!(submit(&mut wam, "?- p(g(Y, X))."), false);
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assert_eq!(submit(&mut wam, "?- p(g(Y, c))."), false);
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assert_eq!(submit(&mut wam, "?- p(g(b))."), false);
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assert_eq!(submit(&mut wam, "?- p([])."), true);
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assert_eq!(submit(&mut wam, "?- p([c, d, e])."), true);
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assert_eq!(submit(&mut wam, "?- p([c, d | X])."), true);
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assert_eq!(submit(&mut wam, "?- p([c|X])."), true);
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assert_eq!(submit(&mut wam, "?- p([Y|X])."), true);
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assert_eq!(submit(&mut wam, "?- p([Y|[d|Xs]])."), true);
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submit(&mut wam, "a.");
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assert_eq!(submit(&mut wam, "?- p(a)."), true);
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assert_eq!(submit(&mut wam, "?- p(b)."), false);
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assert_eq!(submit(&mut wam, "?- p(c)."), false);
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assert_eq!(submit(&mut wam, "?- p(f(a))."), true);
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assert_eq!(submit(&mut wam, "?- p(g(b, X))."), false);
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assert_eq!(submit(&mut wam, "?- p(g(Y, X))."), false);
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assert_eq!(submit(&mut wam, "?- p(g(Y, c))."), false);
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assert_eq!(submit(&mut wam, "?- p(g(b))."), false);
|
|
assert_eq!(submit(&mut wam, "?- p([])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d, e])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d | X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|[d|Xs]])."), true);
|
|
|
|
submit(&mut wam, "b.");
|
|
submit(&mut wam, "f(x).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(a)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(b)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(c)."), false);
|
|
assert_eq!(submit(&mut wam, "?- p(f(a))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(b, X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(Y, X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(Y, c))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(b))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d, e])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d | X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|[d|Xs]])."), true);
|
|
|
|
submit(&mut wam, "c.");
|
|
submit(&mut wam, "g(X).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(a)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(b)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(c)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(f(a))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(b, X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(Y, X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(Y, c))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(b))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d, e])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d | X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|[d|Xs]])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(blah)."), false);
|
|
|
|
submit(&mut wam, "x.");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(a)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(b)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(c)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(true(a))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(b, X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(Y, X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(Y, c))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(g(b))."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d, e])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c, d | X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([c|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|X])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p([Y|[d|Xs]])."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(blah)."), true);
|
|
|
|
submit(&mut wam, "ind_call(or(X, Y)) :- ind_call(X).
|
|
ind_call(trace) :- trace.
|
|
ind_call(or(X, Y)) :- ind_call(Y).
|
|
ind_call(notrace) :- notrace.
|
|
ind_call(nl) :- nl.
|
|
ind_call(X) :- builtin(X).
|
|
ind_call(X) :- extern(X).
|
|
ind_call(ind_call(X)) :- ind_call(X).
|
|
ind_call(repeat).
|
|
ind_call(repeat) :- ind_call(repeat).
|
|
ind_call(false).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- ind_call(repeat)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(false)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(ind_call(repeat))."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(ind_call(false))."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(notrace)."), false);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(nl)."), false);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(builtin(X))."), false);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(extern(X))."), false);
|
|
|
|
submit(&mut wam, "notrace.");
|
|
submit(&mut wam, "nl.");
|
|
|
|
assert_eq!(submit(&mut wam, "?- ind_call(repeat)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(false)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(ind_call(repeat))."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(ind_call(false))."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(notrace)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(nl)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(builtin(X))."), false);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(extern(X))."), false);
|
|
|
|
submit(&mut wam, "builtin(X).");
|
|
submit(&mut wam, "extern(x).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- ind_call(repeat)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(false)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(ind_call(repeat))."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(ind_call(false))."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(notrace)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(nl)."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(builtin(X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- ind_call(extern(X))."), true);
|
|
}
|
|
|
|
#[test]
|
|
fn test_queries_on_conjuctive_queries() {
|
|
let mut wam = Machine::new();
|
|
|
|
submit(&mut wam, "p(a, b).");
|
|
submit(&mut wam, "q(b, c).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, Z)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, X)."), false);
|
|
|
|
submit(&mut wam, "p(a, [f(g(X))]).");
|
|
submit(&mut wam, "q(Y, c).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, Z)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, X)."), false);
|
|
|
|
submit(&mut wam, "member(X, [X|_]).
|
|
member(X, [_|Xs]) :- member(X, Xs).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- member(X, [a,b,c]), member(X, [a,b,c])."), true);
|
|
assert_eq!(submit(&mut wam, "?- member(X, [a,b,c]), member(X, [b,c])."), true);
|
|
assert_eq!(submit(&mut wam, "?- member(X, [a,c]), member(X, [b,c])."), true);
|
|
assert_eq!(submit(&mut wam, "?- member(X, [a,b,c,d]), !, member(X, [a,d])."), true);
|
|
assert_eq!(submit(&mut wam, "?- member(X, [a,b,c,d]), !, member(X, [e])."), false);
|
|
assert_eq!(submit(&mut wam, "?- member([X,X],[a,b,c,[d,d],[e,d]]),
|
|
member(X, [a,b,c,d,e,f,g]),
|
|
member(Y, [X, a, b, c, d])."),
|
|
true);
|
|
assert_eq!(submit(&mut wam, "?- member([X,X],[a,b,c,[d,d],[e,d]]),
|
|
member(X, [a,b,c,d,e,f,g]),
|
|
!,
|
|
member(Y, [X, a, b, c, d])."),
|
|
true);
|
|
|
|
submit(&mut wam, "p(a, [f(g(X))]).");
|
|
submit(&mut wam, "q(Y, c).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, Z)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, X)."), false);
|
|
|
|
submit(&mut wam, "p(a, [f(g(X))]). p(X, c) :- c.");
|
|
submit(&mut wam, "c.");
|
|
submit(&mut wam, "q(Y, c).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, Z)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), !, q(Y, Z)."), true);
|
|
|
|
submit(&mut wam, "q([f(g(x))], Z). q([f(g(y))], Y). q([f(g(z))], a).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, Z)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), !, q(Y, Z)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), !, q(Y, X)."), true);
|
|
|
|
submit(&mut wam, "p(X, [f(g(x))]). p(X, [f(g(y))]). p(X, [f(g(z))]).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- q(f(X), Y), p(X, Y)."), false);
|
|
assert_eq!(submit(&mut wam, "?- q(X, Y), p(X, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(X, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- p(X, Y), q(Y, X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- q(X, Y), p(Y, X)."), true);
|
|
}
|
|
|
|
#[test]
|
|
fn test_queries_on_call_n()
|
|
{
|
|
let mut wam = Machine::new();
|
|
|
|
submit(&mut wam, "maplist(Pred, []).
|
|
maplist(Pred, [X|Xs]) :- call(Pred, X), maplist(Pred, Xs).");
|
|
submit(&mut wam, "f(a). f(b). f(c).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- maplist(f, [X,Y,Z])."), true);
|
|
assert_eq!(submit(&mut wam, "?- maplist(f, [a,Y,Z])."), true);
|
|
assert_eq!(submit(&mut wam, "?- maplist(f, [X,a,b])."), true);
|
|
assert_eq!(submit(&mut wam, "?- maplist(f, [c,a,b])."), true);
|
|
assert_eq!(submit(&mut wam, "?- maplist(f, [d,e,f])."), false);
|
|
assert_eq!(submit(&mut wam, "?- maplist(f, [])."), true);
|
|
assert_eq!(submit(&mut wam, "?- maplist(f(X), [a,b,c])."), false);
|
|
|
|
submit(&mut wam, "f(X) :- call(X), call(X).");
|
|
submit(&mut wam, "p(x). p(y).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(p)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(x))."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(w))."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(X, Y))."), false);
|
|
|
|
submit(&mut wam, "f(P) :- call(P, X), call(P, Y).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(p)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(non_existent)."), false);
|
|
|
|
submit(&mut wam, "f(P, X, Y) :- call(P, X), call(P, Y).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(p, X, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p, x, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p, X, y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p, x, y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p, X, z)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p, z, Y)."), false);
|
|
|
|
assert_eq!(submit(&mut wam, "?- call(p, X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(p, x)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(p, y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(p, z)."), false);
|
|
|
|
submit(&mut wam, "r(f(X)) :- p(X). r(g(Y)) :- p(Y).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(r, X, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(r, X, X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(r, f(X), g(Y))."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(r, j(X), h(Y))."), false);
|
|
|
|
submit(&mut wam, "p(one, one). p(one, two). p(two, two).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(p(one), X, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(one), X, X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(one), one, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(one), one, two)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(one), one, three)."), false);
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(p(two), one, two)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(two), two, one)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(two), two, two)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(two), two, three)."), false);
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(p(three), X, Y)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(three), X, X)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(three), one, Y)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(three), one, two)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(three), one, three)."), false);
|
|
|
|
submit(&mut wam, "f(P, X) :- call(P, X).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(p(one), one)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(two), two)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(p(two), one)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(three), one)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(one), three)."), false);
|
|
assert_eq!(submit(&mut wam, "?- f(p(two), three)."), false);
|
|
|
|
submit(&mut wam, "p(f(g(X)), compound, [lists,are,good]).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- call(p(f(g(X))), Y, Z)."), true);
|
|
|
|
submit(&mut wam, "david_lynch(coffee).
|
|
david_lynch(pie).
|
|
david_lynch(kyle(Film)) :- kyle(Film).");
|
|
|
|
submit(&mut wam, "kyle(dune).
|
|
kyle(blue_velvet).
|
|
kyle(showgirls).
|
|
kyle(flintstones).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- call(david_lynch, X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(david_lynch, kyle(Film))."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(david_lynch, kyle(Film), _)."), false);
|
|
|
|
submit(&mut wam, "call_mult(P, X) :- call(call(P), X).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- call_mult(p(X), Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call_mult(p(X), X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call_mult(p(one), X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call_mult(p(X), one)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call_mult(p(two), one)."), false);
|
|
assert_eq!(submit(&mut wam, "?- call_mult(p(two), two)."), true);
|
|
|
|
assert_eq!(submit(&mut wam, "?- call(call(p(one)), X), call(call(p(two)), two)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p(one, X))), call(call(p(two, two)))."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p(one)), X), call(call(p(two)), one)."), false);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p(X)), X), call(call(p(Y)), Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p(X)), Y), call(call(p(Y)), X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p), X, Y), call(call(call(p)), X, Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p), X, Y), call(call(call(p(X))), Y)."), true);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p), X, Y), call(call(call(p(X))), X, Y)."), false);
|
|
assert_eq!(submit(&mut wam, "?- call(call(p), X, Y), call(call(call(p(X))), X)."), true);
|
|
|
|
submit(&mut wam, "f(call(f, undefined)). f(undefined).");
|
|
submit(&mut wam, "call_var(P) :- P.");
|
|
|
|
assert_eq!(submit(&mut wam, "?- f(X), call_var(X)."), true);
|
|
assert_eq!(submit(&mut wam, "?- f(call(f, Q)), call_var(call(f, Q))."), true);
|
|
assert_eq!(submit(&mut wam, "?- call_var(call(undefined, Q))."), false);
|
|
|
|
assert_eq!(submit(&mut wam, "?- call(call)."), false);
|
|
assert_eq!(submit(&mut wam, "?- call(call(call))."), false);
|
|
assert_eq!(submit(&mut wam, "?- call(call(call(call)))."), false);
|
|
assert_eq!(submit(&mut wam, "?- call(call(call(call(call))))."), false);
|
|
assert_eq!(submit(&mut wam, "?- call(call(call(call(call(call)))))."), false);
|
|
assert_eq!(submit(&mut wam, "?- call(call(call(call(call(call(p(X)))))))."), true);
|
|
}
|
|
|
|
#[test]
|
|
fn test_queries_on_exceptions()
|
|
{
|
|
let mut wam = Machine::new();
|
|
|
|
submit(&mut wam, "f(a). f(_) :- throw(stuff).");
|
|
submit(&mut wam, "handle(stuff).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), Exception, handle(Exception))."), true);
|
|
|
|
submit(&mut wam, "f(a). f(X) :- g(X).");
|
|
submit(&mut wam, "g(x). g(y). g(z).");
|
|
submit(&mut wam, "handle(x). handle(y).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), X, handle(X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(a), _, handle(X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(b), _, handle(X))."), false);
|
|
|
|
submit(&mut wam, "g(x). g(X) :- throw(x).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), x, handle(X))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), x, handle(z))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(z), x, handle(x))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(z), x, handle(y))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(z), x, handle(z))."), false);
|
|
|
|
submit(&mut wam, "f(X) :- throw(stuff). f(X) :- throw(other_stuff).");
|
|
submit(&mut wam, "handle(stuff). handle(other_stuff).");
|
|
|
|
// this should deterministically succeed with Exception = stuff.
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), Exception, handle(Exception))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), Exception, handle(stuff))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), Exception, handle(other_stuff))."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), Exception, handle(not_stuff))."), false);
|
|
|
|
submit(&mut wam, "f(success). f(X) :- catch(g(X), E, handle(E)).");
|
|
submit(&mut wam, "g(g_success). g(g_success_2). g(X) :- throw(X).");
|
|
submit(&mut wam, "handle(x). handle(y). handle(z).");
|
|
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), E, E)."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(fail), _, _)."), false);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(x), _, _)."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(y), _, _)."), true);
|
|
assert_eq!(submit(&mut wam, "?- catch(f(z), _, _)."), true);
|
|
|
|
submit(&mut wam, "f(success). f(E) :- catch(g(E), E, handle(E)).");
|
|
submit(&mut wam, "g(g_success). g(g_success_2). g(X) :- throw(X).");
|
|
submit(&mut wam, "handle(x). handle(y). handle(z). handle(v) :- throw(X).");
|
|
|
|
//TODO: fix this test. record the ball properly. currently it
|
|
// is unwound when the heap is truncated.
|
|
assert_eq!(submit(&mut wam, "?- catch(f(X), E, E)."), true);
|
|
}
|
|
}
|
|
|
|
fn process_buffer(wam: &mut Machine, buffer: &str)
|
|
{
|
|
match parse_code(buffer.trim()) {
|
|
Some(tl) => {
|
|
let result = eval(wam, &tl);
|
|
print(wam, result);
|
|
},
|
|
None => println!("Grammatical error!")
|
|
};
|
|
}
|
|
|
|
fn prolog_repl() {
|
|
let mut wam = Machine::new();
|
|
|
|
loop {
|
|
print!("prolog> ");
|
|
|
|
let buffer = read();
|
|
|
|
if buffer == "quit\n" {
|
|
break;
|
|
} else if buffer == "clear\n" {
|
|
wam.clear();
|
|
continue;
|
|
}
|
|
|
|
process_buffer(&mut wam, buffer.trim());
|
|
wam.reset();
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
prolog_repl();
|
|
}
|