22 lines
526 B
C++
22 lines
526 B
C++
/*
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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 "library/expr_pair.h"
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#include "kernel/builtin.h"
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namespace lean {
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bool is_eq_heq(expr const & e) {
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return is_eq(e) || is_homo_eq(e);
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}
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expr_pair eq_heq_args(expr const & e) {
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lean_assert(is_eq(e) || is_homo_eq(e));
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if (is_eq(e))
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return expr_pair(eq_lhs(e), eq_rhs(e));
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else
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return expr_pair(arg(e, 2), arg(e, 3));
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}
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}
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