39 lines
1.5 KiB
C++
39 lines
1.5 KiB
C++
/*
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Copyright (c) 2014 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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#pragma once
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#include "util/rb_tree.h"
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#include "kernel/metavar.h"
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#include "library/expr_lt.h"
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namespace lean {
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/** \brief Helper object for collecting metavariables occurring in expressions.
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It also provides a method that given a substitution \c s, produces a constraint
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?m =?= s(?m)
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for each collected metavariable ?m that is assigned in \c s.
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\remark Metavariables occuring in the type of other metavariables are ignored.
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*/
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class metavar_closure {
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rb_tree<expr, expr_quick_cmp> m_expr_mvars;
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rb_tree<level, level_quick_cmp> m_lvl_mvars;
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public:
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metavar_closure() {}
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metavar_closure(expr const & e) { add(e); }
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/** \brief Collect metavariables occurring in \c e */
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void add(expr const & e);
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void add(level const & l);
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/** \brief Execute \c fn for each collected metavariable */
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void for_each_expr_mvar(std::function<void(expr const &)> const & fn) const;
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void for_each_level_mvar(std::function<void(level const &)> const & fn) const;
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/** \brief For each collected metavariable ?m, store in \c r constraints of the form ?m =?= s(?m)
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if ?m is assigned by \c s. The constraints are justified by \c j
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\see mk_eq_cnstr
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*/
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void mk_constraints(substitution s, justification const & j, buffer<constraint> & r) const;
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constraints mk_constraints(substitution s, justification const & j) const;
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};
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}
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