23 lines
538 B
C++
23 lines
538 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 "kernel/occurs.h"
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#include "library/placeholder.h"
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namespace lean {
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static name g_placeholder_name("_");
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expr mk_placholder() {
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return mk_constant(g_placeholder_name);
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}
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bool is_placeholder(expr const & e) {
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return is_constant(e) && const_name(e) == g_placeholder_name;
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}
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bool has_placeholder(expr const & e) {
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return occurs(mk_placholder(), e);
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}
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}
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