refactor(library/projection): remove projection macro from library
This commit is contained in:
Leonardo de Moura
parent
dd145926a2
commit
c15bcf1354
2 changed files with 0 additions and 126 deletions
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@ -69,107 +69,6 @@ static void projection_info_reader(deserializer & d, shared_environment & senv,
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static name * g_projection_macro_name = nullptr;
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static std::string * g_projection_opcode = nullptr;
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class projection_macro_definition_cell : public macro_definition_cell {
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name m_proj_name;
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void check_macro(expr const & m) const {
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if (!is_macro(m) || macro_num_args(m) != 1)
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throw exception(sstream() << "invalid '" << m_proj_name
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<< "' projection macro, incorrect number of arguments");
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}
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public:
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projection_macro_definition_cell(name const & n):m_proj_name(n) {}
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name const & get_proj_name() const { return m_proj_name; }
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virtual name get_name() const { return m_proj_name; } // *g_projection_macro_name; }
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virtual format pp(formatter const &) const { return format(m_proj_name); }
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virtual void display(std::ostream & out) const { out << m_proj_name; }
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virtual pair<expr, constraint_seq> check_type(expr const & m, extension_context & ctx, bool infer_only) const {
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check_macro(m);
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environment const & env = ctx.env();
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constraint_seq cs;
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expr s = macro_arg(m, 0);
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expr s_t = ctx.whnf(ctx.check_type(s, cs, infer_only), cs);
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buffer<expr> I_args;
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expr const & I = get_app_args(s_t, I_args);
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if (is_constant(I)) {
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declaration proj_decl = env.get(m_proj_name);
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if (length(const_levels(I)) != proj_decl.get_num_univ_params())
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throw_kernel_exception(env, sstream() << "invalid projection application '" << m_proj_name
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<< "', incorrect number of universe parameters", m);
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expr t = instantiate_type_univ_params(proj_decl, const_levels(I));
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I_args.push_back(s);
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unsigned num = I_args.size();
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for (unsigned i = 0; i < num; i++) {
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if (!is_pi(t))
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throw_kernel_exception(env, sstream() << "invalid projection application '" << m_proj_name
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<< "', number of arguments mismatch", m);
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t = binding_body(t);
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}
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return mk_pair(instantiate_rev(t, I_args.size(), I_args.data()), cs);
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} else {
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// TODO(Leo)
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throw_kernel_exception(env, sstream() << "projection macros do not support arbitrary terms "
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<< "containing metavariables yet (solution: use trust-level 0)", m);
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}
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}
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// try to unfold projection argument into a \c c constructor application
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static optional<expr> process_proj_arg(environment const & env, name const & c, expr const & s) {
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if (optional<name> mk_name = is_constructor_app_ext(env, s)) {
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if (*mk_name == c) {
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expr new_s = s;
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while (is_app(new_s) && !is_constructor_app(env, new_s)) {
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if (auto next_new_s = unfold_app(env, new_s))
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new_s = *next_new_s;
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else
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return none_expr();
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}
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if (is_app(new_s))
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return some_expr(new_s);
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}
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}
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return none_expr();
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}
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virtual optional<expr> expand(expr const & m, extension_context & ctx) const {
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check_macro(m);
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environment const & env = ctx.env();
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auto info = get_projection_info(env, m_proj_name);
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if (!info)
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throw_kernel_exception(env, sstream() << "invalid projection application '" << m_proj_name
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<< "', constant is not a projection function", m);
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expr const & s = macro_arg(m, 0);
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if (optional<expr> mk = process_proj_arg(env, info->m_constructor, s)) {
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// efficient version
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buffer<expr> mk_args;
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get_app_args(*mk, mk_args);
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unsigned i = info->m_nparams + info->m_i;
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lean_assert(i < mk_args.size());
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return some_expr(mk_args[i]);
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} else {
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// use definition
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constraint_seq cs;
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expr s_t = ctx.whnf(ctx.infer_type(s, cs), cs);
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if (cs)
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return none_expr();
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buffer<expr> I_args;
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expr const & I = get_app_args(s_t, I_args);
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if (!is_constant(I))
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return none_expr();
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return some_expr(mk_app(mk_app(mk_constant(m_proj_name, const_levels(I)), I_args), s));
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}
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}
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virtual void write(serializer & s) const {
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s.write_string(*g_projection_opcode);
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s << m_proj_name;
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}
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};
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/** \brief Return true iff the type named \c S can be viewed as
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/** \brief Return true iff the type named \c S can be viewed as
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a structure in the given environment.
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a structure in the given environment.
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@ -183,11 +82,6 @@ bool is_structure_like(environment const & env, name const & S) {
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return length(inductive::inductive_decl_intros(decl)) == 1 && *inductive::get_num_indices(env, S) == 0;
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return length(inductive::inductive_decl_intros(decl)) == 1 && *inductive::get_num_indices(env, S) == 0;
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}
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}
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expr mk_projection_macro(name const & proj_name, expr const & e) {
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macro_definition def(new projection_macro_definition_cell(proj_name));
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return mk_macro(def, 1, &e);
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}
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projection_info const * projection_converter::is_projection(expr const & e) const {
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projection_info const * projection_converter::is_projection(expr const & e) const {
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expr const & f = get_app_fn(e);
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expr const & f = get_app_fn(e);
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if (is_constant(f))
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if (is_constant(f))
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@ -320,22 +214,10 @@ void initialize_projection() {
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g_ext = new projection_ext_reg();
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g_ext = new projection_ext_reg();
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g_proj_key = new std::string("proj");
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g_proj_key = new std::string("proj");
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register_module_object_reader(*g_proj_key, projection_info_reader);
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register_module_object_reader(*g_proj_key, projection_info_reader);
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g_projection_macro_name = new name("projection");
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g_projection_opcode = new std::string("Proj");
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register_macro_deserializer(*g_projection_opcode,
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[](deserializer & d, unsigned num, expr const * args) {
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if (num != 1)
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throw corrupted_stream_exception();
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name proj_name;
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d >> proj_name;
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return mk_projection_macro(proj_name, args[0]);
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});
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}
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}
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void finalize_projection() {
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void finalize_projection() {
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delete g_proj_key;
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delete g_proj_key;
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delete g_ext;
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delete g_ext;
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delete g_projection_macro_name;
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delete g_projection_opcode;
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}
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}
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}
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}
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@ -48,14 +48,6 @@ inline bool is_projection(environment const & env, name const & n) {
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return get_projection_info(env, n) != nullptr;
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return get_projection_info(env, n) != nullptr;
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}
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}
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/** \brief Create a projection macro term that can peform the following reduction efficiently
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pr_i A (mk A f_1 ... f_n) ==> f_i
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\remark proj_name is the name of the definition that implements the actual projection.
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*/
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expr mk_projection_macro(name const & proj_name, expr const & e);
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/** \brief Return true iff the type named \c S can be viewed as
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/** \brief Return true iff the type named \c S can be viewed as
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a structure in the given environment.
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a structure in the given environment.
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