08bc333705
Detected by https://clang.llvm.org/extra/clang-tidy/checks/performance/noexcept-move-constructor.html. This ensures constructions like `std::vector<object_ref>` call these operators instead of the copy ones, and do not do extra refcounting. Note that `optional` and `atomic` need something more complex using `noexcept()`, as they are templated.
106 lines
5.2 KiB
C++
106 lines
5.2 KiB
C++
/*
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Copyright (c) 2018 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/name_generator.h"
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#include "util/rb_map.h"
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#include "util/name_map.h"
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#include "kernel/expr.h"
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namespace lean {
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/*
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inductive LocalDecl
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| cdecl (index : Nat) (name : Name) (userName : Name) (type : Expr) (bi : BinderInfo)
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| ldecl (index : Nat) (name : Name) (userName : Name) (type : Expr) (value : Expr)
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*/
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class local_decl : public object_ref {
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friend class local_ctx;
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friend class local_context;
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friend void initialize_local_ctx();
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local_decl(unsigned idx, name const & n, name const & un, expr const & t, expr const & v);
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local_decl(local_decl const & d, expr const & t, expr const & v);
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local_decl(unsigned idx, name const & n, name const & un, expr const & t, binder_info bi);
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local_decl(local_decl const & d, expr const & t);
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public:
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local_decl();
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local_decl(local_decl const & other):object_ref(other) {}
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local_decl(local_decl && other) noexcept:object_ref(std::move(other)) {}
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local_decl(obj_arg o):object_ref(o) {}
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local_decl(b_obj_arg o, bool):object_ref(o, true) {}
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local_decl & operator=(local_decl const & other) { object_ref::operator=(other); return *this; }
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local_decl & operator=(local_decl && other) noexcept { object_ref::operator=(std::move(other)); return *this; }
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friend bool is_eqp(local_decl const & d1, local_decl const & d2) { return d1.raw() == d2.raw(); }
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unsigned get_idx() const { return static_cast<nat const &>(cnstr_get_ref(raw(), 0)).get_small_value(); }
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name const & get_name() const { return static_cast<name const &>(cnstr_get_ref(raw(), 1)); }
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name const & get_user_name() const { return static_cast<name const &>(cnstr_get_ref(raw(), 2)); }
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expr const & get_type() const { return static_cast<expr const &>(cnstr_get_ref(raw(), 3)); }
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optional<expr> get_value() const {
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if (cnstr_tag(raw()) == 0) return none_expr();
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return some_expr(static_cast<expr const &>(cnstr_get_ref(raw(), 4)));
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}
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binder_info get_info() const;
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expr mk_ref() const;
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};
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/* Plain local context object used by the kernel type checker. */
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class local_ctx : public object_ref {
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protected:
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template<bool is_lambda> expr mk_binding(unsigned num, expr const * fvars, expr const & b, bool remove_dead_let = false) const;
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public:
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local_ctx();
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explicit local_ctx(obj_arg o):object_ref(o) {}
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local_ctx(b_obj_arg o, bool):object_ref(o, true) {}
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local_ctx(local_ctx const & other):object_ref(other) {}
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local_ctx(local_ctx && other) noexcept:object_ref(std::move(other)) {}
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local_ctx & operator=(local_ctx const & other) { object_ref::operator=(other); return *this; }
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local_ctx & operator=(local_ctx && other) noexcept { object_ref::operator=(std::move(other)); return *this; }
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bool empty() const;
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/* Low level `mk_local_decl` */
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local_decl mk_local_decl(name const & n, name const & un, expr const & type, binder_info bi);
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/* Low level `mk_local_decl` */
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local_decl mk_local_decl(name const & n, name const & un, expr const & type, expr const & value);
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expr mk_local_decl(name_generator & g, name const & un, expr const & type, binder_info bi = mk_binder_info()) {
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return mk_local_decl(g.next(), un, type, bi).mk_ref();
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}
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expr mk_local_decl(name_generator & g, name const & un, expr const & type, expr const & value) {
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return mk_local_decl(g.next(), un, type, value).mk_ref();
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}
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/** \brief Return the local declarations for the given reference. */
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optional<local_decl> find_local_decl(name const & n) const;
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optional<local_decl> find_local_decl(expr const & e) const { return find_local_decl(fvar_name(e)); }
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local_decl get_local_decl(name const & n) const;
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local_decl get_local_decl(expr const & e) const { return get_local_decl(fvar_name(e)); }
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/* \brief Return type of the given free variable.
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\pre is_fvar(e) */
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expr get_type(expr const & e) const { return get_local_decl(e).get_type(); }
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/** Return the free variable associated with the given name.
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\pre get_local_decl(n) */
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expr get_local(name const & n) const;
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/** \brief Remove the given local decl. */
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void clear(local_decl const & d);
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expr mk_lambda(unsigned num, expr const * fvars, expr const & e, bool remove_dead_let = false) const;
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expr mk_pi(unsigned num, expr const * fvars, expr const & e, bool remove_dead_let = false) const;
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expr mk_lambda(buffer<expr> const & fvars, expr const & e, bool remove_dead_let = false) const { return mk_lambda(fvars.size(), fvars.data(), e, remove_dead_let); }
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expr mk_pi(buffer<expr> const & fvars, expr const & e, bool remove_dead_let = false) const { return mk_pi(fvars.size(), fvars.data(), e, remove_dead_let); }
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expr mk_lambda(expr const & fvar, expr const & e) { return mk_lambda(1, &fvar, e); }
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expr mk_pi(expr const & fvar, expr const & e) { return mk_pi(1, &fvar, e); }
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expr mk_lambda(std::initializer_list<expr> const & fvars, expr const & e) { return mk_lambda(fvars.size(), fvars.begin(), e); }
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expr mk_pi(std::initializer_list<expr> const & fvars, expr const & e) { return mk_pi(fvars.size(), fvars.begin(), e); }
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};
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void initialize_local_ctx();
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void finalize_local_ctx();
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}
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