46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
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/*
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Copyright (c) 2013 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include "occurs.h"
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#include "abstract.h"
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using namespace lean;
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static void tst1() {
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expr f = Const("f");
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expr a = Const("a");
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expr b = Const("b");
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expr T = Type();
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lean_assert(occurs(f, f));
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lean_assert(!occurs(a, f));
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lean_assert(occurs(a, f(a)));
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lean_assert(occurs("a", f(a)));
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lean_assert(!occurs("b", f));
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lean_assert(!occurs(a, Fun({a, T}, f(a))));
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context c;
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c = extend(c, name("x"), T);
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lean_assert(!occurs(f, c));
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lean_assert(occurs(f, c, {a, f(a)}));
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lean_assert(occurs(f(a), c, {a, f(a)}));
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lean_assert(!occurs(f(b), c, {a, f(a)}));
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lean_assert(occurs("f", c, {a, f(a)}));
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lean_assert(!occurs(b, c, {a, f(a)}));
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c = extend(c, name("y"), T, f(a));
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lean_assert(!occurs("x", c));
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lean_assert(occurs(f, c));
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lean_assert(occurs("f", c));
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c = extend(c, name("z"), T, f(Const("x")));
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lean_assert(occurs("x", c));
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lean_assert(occurs("a", c));
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lean_assert(occurs(f(Const("x")), c));
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lean_assert(!occurs(f(b), c));
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}
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int main() {
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continue_on_violation(true);
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tst1();
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return has_violations() ? 1 : 0;
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}
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