152 lines
6.5 KiB
C++
152 lines
6.5 KiB
C++
/*
|
|
Copyright (c) 2016 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/name_map.h"
|
|
#include "util/name_set.h"
|
|
#include "kernel/expr.h"
|
|
|
|
namespace lean {
|
|
class local_decl {
|
|
public:
|
|
struct cell {
|
|
/*
|
|
<name> : <type> := <value>
|
|
|
|
m_pp_name is used for interacting with the user.
|
|
It may not be not unique.
|
|
*/
|
|
name m_name; /* this one is unique */
|
|
name m_pp_name;
|
|
expr m_type;
|
|
optional<expr> m_value;
|
|
binder_info m_bi;
|
|
unsigned m_idx;
|
|
MK_LEAN_RC(); // Declare m_rc counter
|
|
void dealloc();
|
|
cell(unsigned idx, name const & n, name const & pp_n, expr const & t, optional<expr> const & v,
|
|
binder_info const & bi);
|
|
};
|
|
private:
|
|
cell * m_ptr;
|
|
friend class local_context;
|
|
friend void initialize_local_context();
|
|
local_decl(unsigned idx, name const & n, name const & pp_n, expr const & t, optional<expr> const & v, binder_info const & bi);
|
|
local_decl(local_decl const & d, expr const & t, optional<expr> const & v);
|
|
public:
|
|
local_decl();
|
|
local_decl(local_decl const & s):m_ptr(s.m_ptr) { if (m_ptr) m_ptr->inc_ref(); }
|
|
local_decl(local_decl && s):m_ptr(s.m_ptr) { s.m_ptr = nullptr; }
|
|
~local_decl() { if (m_ptr) m_ptr->dec_ref(); }
|
|
local_decl & operator=(local_decl const & s) { LEAN_COPY_REF(s); }
|
|
local_decl & operator=(local_decl && s) { LEAN_MOVE_REF(s); }
|
|
|
|
friend bool is_eqp(local_decl const & a, local_decl const & b) { return a.m_ptr == b.m_ptr; }
|
|
|
|
name const & get_name() const { return m_ptr->m_name; }
|
|
name const & get_pp_name() const { return m_ptr->m_pp_name; }
|
|
expr const & get_type() const { return m_ptr->m_type; }
|
|
optional<expr> const & get_value() const { return m_ptr->m_value; }
|
|
binder_info const & get_info() const { return m_ptr->m_bi; }
|
|
expr mk_ref() const;
|
|
unsigned get_idx() const { return m_ptr->m_idx; }
|
|
};
|
|
|
|
bool is_local_decl_ref(expr const & e);
|
|
|
|
bool depends_on(expr const & e, unsigned num, expr const * locals);
|
|
bool depends_on(local_decl const & d, unsigned num, expr const * locals);
|
|
bool depends_on(expr const & e, buffer<expr> const & locals);
|
|
bool depends_on(local_decl const & d, buffer<expr> const & locals);
|
|
|
|
class metavar_context;
|
|
|
|
class local_context {
|
|
typedef rb_map<unsigned, local_decl, unsigned_cmp> idx2local_decl;
|
|
unsigned m_next_idx;
|
|
name_map<local_decl> m_name2local_decl;
|
|
idx2local_decl m_idx2local_decl;
|
|
friend class type_context;
|
|
|
|
local_context remove(buffer<expr> const & locals) const;
|
|
expr mk_local_decl(name const & n, name const & ppn, expr const & type,
|
|
optional<expr> const & value, binder_info const & bi);
|
|
public:
|
|
local_context():m_next_idx(0) {}
|
|
|
|
bool empty() const { return m_idx2local_decl.empty(); }
|
|
|
|
expr mk_local_decl(expr const & type, binder_info const & bi = binder_info());
|
|
expr mk_local_decl(expr const & type, expr const & value);
|
|
expr mk_local_decl(name const & ppn, expr const & type, binder_info const & bi = binder_info());
|
|
expr mk_local_decl(name const & ppn, expr const & type, expr const & value);
|
|
/** \brief Return the local declarations for the given reference.
|
|
\pre is_local_decl_ref(e) */
|
|
optional<local_decl> get_local_decl(expr const & e) const;
|
|
optional<local_decl> get_local_decl(name const & n) const;
|
|
/** \brief Traverse local declarations based on the order they were created */
|
|
void for_each(std::function<void(local_decl const &)> const & fn) const;
|
|
optional<local_decl> find_if(std::function<bool(local_decl const &)> const & pred) const; // NOLINT
|
|
optional<local_decl> back_find_if(std::function<bool(local_decl const &)> const & pred) const; // NOLINT
|
|
|
|
/** \brief Return the most recently added local_decl \c d s.t. d.get_pp_name() == n
|
|
\remark This method is used to implement tactics such as 'revert'. */
|
|
optional<local_decl> get_local_decl_from_user_name(name const & n) const;
|
|
|
|
optional<local_decl> get_last_local_decl() const;
|
|
|
|
bool rename_user_name(name const & from, name const & to);
|
|
|
|
/** \brief Execute fn for each local declaration created after \c d. */
|
|
void for_each_after(local_decl const & d, std::function<void(local_decl const &)> const & fn) const;
|
|
|
|
/** \brief Return a non-none iff other local decls depends on \c d. If the result is not none,
|
|
then it is the name of the local decl that depends on d.
|
|
\pre \c d is in this local context. */
|
|
optional<local_decl> has_dependencies(local_decl const & d) const;
|
|
|
|
/** \brief Return an unused hypothesis "user name" with the given prefix, the suffix is an
|
|
unsigned >= idx. */
|
|
name get_unused_name(name const & prefix, unsigned & idx) const;
|
|
name get_unused_name(name const & suggestion) const;
|
|
/** \brief Return true iff the given name is a hypothesis "user name". */
|
|
bool uses_user_name(name const & n) const;
|
|
|
|
/** \brief Remove the given local decl. */
|
|
void clear(local_decl const & d);
|
|
|
|
/** \brief Return true iff all locals in this context are in the set \c ls. */
|
|
bool is_subset_of(name_set const & ls) const;
|
|
/** \brief Return true iff all locals in this context are also in \c ctx. */
|
|
bool is_subset_of(local_context const & ctx) const;
|
|
|
|
void pop_local_decl();
|
|
|
|
/** \brief We say a local context is well-formed iff all local declarations only
|
|
contain local_decl references that were defined before them.
|
|
|
|
\remark This method is for debugging purposes. */
|
|
bool well_formed() const;
|
|
|
|
/** \brief Return true iff \c e is well-formed with respect to this local context.
|
|
That is, all local_decl references in \c e are defined in this context. */
|
|
bool well_formed(expr const & e) const;
|
|
|
|
format pp(formatter const & fmt) const;
|
|
|
|
/** \brief Replaced assigned metavariables with their values.
|
|
This method is a little bit hackish since it reuses the names and ids of
|
|
the existing local_decls. So, it may affects cached information.
|
|
|
|
This method is mainly used in the elaborator for reporting errors,
|
|
and for instantiating metavariables created by the elaborator before
|
|
invoking the tactic framework. */
|
|
local_context instantiate_mvars(metavar_context & ctx) const;
|
|
};
|
|
|
|
void initialize_local_context();
|
|
void finalize_local_context();
|
|
}
|