39 lines
1.6 KiB
C++
39 lines
1.6 KiB
C++
/*
|
|
Copyright (c) 2014 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
|
|
Author: Leonardo de Moura
|
|
*/
|
|
#pragma once
|
|
#include "util/rb_tree.h"
|
|
#include "kernel/metavar.h"
|
|
#include "library/expr_lt.h"
|
|
|
|
namespace lean {
|
|
/** \brief Helper object for collecting metavariables occurring in expressions.
|
|
It also provides a method that given a substitution \c s, produces a constraint
|
|
?m =?= s(?m)
|
|
for each collected metavariable ?m that is assigned in \c s.
|
|
|
|
\remark Metavariables occuring in the type of other metavariables are ignored.
|
|
*/
|
|
class metavar_closure {
|
|
rb_tree<expr, expr_quick_cmp> m_expr_mvars;
|
|
rb_tree<level, level_quick_cmp> m_lvl_mvars;
|
|
public:
|
|
metavar_closure() {}
|
|
metavar_closure(expr const & e) { add(e); }
|
|
/** \brief Collect metavariables occurring in \c e */
|
|
void add(expr const & e);
|
|
void add(level const & l);
|
|
/** \brief Execute \c fn for each collected metavariable */
|
|
void for_each_expr_mvar(std::function<void(expr const &)> const & fn) const;
|
|
void for_each_level_mvar(std::function<void(level const &)> const & fn) const;
|
|
/** \brief For each collected metavariable ?m, store in \c r constraints of the form ?m =?= s(?m)
|
|
if ?m is assigned by \c s. The constraints are justified by \c j and \c relax
|
|
\see mk_eq_cnstr
|
|
*/
|
|
void mk_constraints(substitution s, justification const & j, bool relax, buffer<constraint> & r) const;
|
|
constraints mk_constraints(substitution s, justification const & j, bool relax) const;
|
|
};
|
|
}
|