531 lines
20 KiB
C++
531 lines
20 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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#include <algorithm>
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#include "util/sstream.h"
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#include "util/sexpr/option_declarations.h"
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#include "kernel/type_checker.h"
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#include "library/io_state_stream.h"
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#include "library/scoped_ext.h"
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#include "library/aliases.h"
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#include "library/private.h"
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#include "library/locals.h"
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#include "frontends/lean/parser.h"
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#include "frontends/lean/calc.h"
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#include "frontends/lean/notation_cmd.h"
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namespace lean {
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static name g_raw("raw");
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static name g_llevel_curly(".{");
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static name g_rcurly("}");
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static name g_colon(":");
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static name g_assign(":=");
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static name g_private("[private]");
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static name g_inline("[inline]");
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static name g_true("true");
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static name g_false("false");
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static name g_options("options");
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static name g_lparen("(");
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static name g_rparen(")");
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static name g_arrow("->");
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static name g_lbracket("[");
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static name g_rbracket("]");
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static name g_declarations("declarations");
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static name g_decls("decls");
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static name g_hiding("hiding");
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static name g_renaming("renaming");
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static void check_atomic(name const & n) {
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if (!n.is_atomic())
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throw exception(sstream() << "invalid declaration name '" << n << "', identifier must be atomic");
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}
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environment universe_cmd(parser & p) {
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name n = p.check_id_next("invalid universe declaration, identifier expected");
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check_atomic(n);
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environment env = p.env();
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if (in_section(env)) {
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p.add_local_level(n, mk_param_univ(n));
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} else {
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name const & ns = get_namespace(env);
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name full_n = ns + n;
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env = module::add_universe(env, full_n);
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if (!ns.is_anonymous())
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env = add_alias(env, n, mk_global_univ(full_n));
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}
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return env;
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}
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static void check_in_section(parser const & p) {
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if (!in_section(p.env()))
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throw exception(sstream() << "invalid command, it must be used in a section");
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}
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static void parse_univ_params(parser & p, buffer<name> & ps) {
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if (p.curr_is_token(g_llevel_curly)) {
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p.next();
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while (!p.curr_is_token(g_rcurly)) {
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name l = p.check_id_next("invalid universe parameter, identifier expected");
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p.add_local_level(l, mk_param_univ(l));
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ps.push_back(l);
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}
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p.next();
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}
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}
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static void update_parameters(buffer<name> & ls_buffer, name_set const & found, parser const & p) {
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unsigned old_sz = ls_buffer.size();
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found.for_each([&](name const & n) {
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if (std::find(ls_buffer.begin(), ls_buffer.begin() + old_sz, n) == ls_buffer.begin() + old_sz)
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ls_buffer.push_back(n);
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});
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std::sort(ls_buffer.begin(), ls_buffer.end(), [&](name const & n1, name const & n2) {
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return p.get_local_level_index(n1) < p.get_local_level_index(n2);
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});
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}
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static environment declare_var(parser & p, environment env,
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name const & n, level_param_names const & ls, expr const & type,
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bool is_axiom, binder_info const & bi, pos_info const & pos) {
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if (in_section(p.env())) {
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p.add_local_expr(n, p.save_pos(mk_local(n, type), pos), bi);
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return env;
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} else {
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name const & ns = get_namespace(env);
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name full_n = ns + n;
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if (is_axiom)
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env = module::add(env, check(env, mk_axiom(full_n, ls, type)));
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else
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env = module::add(env, check(env, mk_var_decl(full_n, ls, type)));
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if (!ns.is_anonymous())
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env = add_alias(env, n, mk_constant(full_n));
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return env;
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}
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}
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static environment variable_cmd_core(parser & p, bool is_axiom, binder_info const & bi) {
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auto pos = p.pos();
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name n = p.check_id_next("invalid declaration, identifier expected");
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check_atomic(n);
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buffer<name> ls_buffer;
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if (p.curr_is_token(g_llevel_curly) && in_section(p.env()))
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throw parser_error("invalid declaration, axioms/parameters occurring in sections cannot be universe polymorphic", p.pos());
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optional<parser::local_scope> scope1;
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if (!in_section(p.env()))
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scope1.emplace(p);
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parse_univ_params(p, ls_buffer);
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parser::param_universe_scope scope2(p);
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expr type;
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if (!p.curr_is_token(g_colon)) {
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buffer<parameter> ps;
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auto lenv = p.parse_binders(ps);
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p.check_token_next(g_colon, "invalid declaration, ':' expected");
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type = p.parse_scoped_expr(ps, lenv);
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type = p.pi_abstract(ps, type);
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} else {
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p.next();
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type = p.parse_expr();
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}
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level_param_names ls;
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if (in_section(p.env())) {
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ls = to_level_param_names(collect_univ_params(type));
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} else {
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update_parameters(ls_buffer, collect_univ_params(type), p);
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ls = to_list(ls_buffer.begin(), ls_buffer.end());
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}
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type = p.elaborate(type, ls);
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return declare_var(p, p.env(), n, ls, type, is_axiom, bi, pos);
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}
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environment variable_cmd(parser & p) {
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return variable_cmd_core(p, false, binder_info());
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}
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environment axiom_cmd(parser & p) {
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return variable_cmd_core(p, true, binder_info());
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}
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environment implicit_variable_cmd(parser & p) {
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check_in_section(p);
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return variable_cmd_core(p, false, mk_implicit_binder_info());
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}
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environment implicit_axiom_cmd(parser & p) {
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check_in_section(p);
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return variable_cmd_core(p, true, mk_implicit_binder_info());
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}
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environment cast_variable_cmd(parser & p) {
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check_in_section(p);
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return variable_cmd_core(p, false, mk_cast_binder_info());
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}
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static environment variables_cmd_core(parser & p, bool is_axiom, binder_info const & bi) {
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auto pos = p.pos();
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buffer<name> ids;
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while (!p.curr_is_token(g_colon)) {
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name id = p.check_id_next("invalid parameters declaration, identifier expected");
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check_atomic(id);
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ids.push_back(id);
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}
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p.next();
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optional<parser::local_scope> scope1;
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if (!in_section(p.env()))
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scope1.emplace(p);
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parser::param_universe_scope scope2(p);
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expr type = p.parse_expr();
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level_param_names ls = to_level_param_names(collect_univ_params(type));
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type = p.elaborate(type, ls);
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environment env = p.env();
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for (auto id : ids)
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env = declare_var(p, env, id, ls, type, is_axiom, bi, pos);
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return env;
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}
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environment variables_cmd(parser & p) {
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return variables_cmd_core(p, false, binder_info());
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}
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environment implicit_variables_cmd(parser & p) {
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check_in_section(p);
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return variables_cmd_core(p, false, mk_implicit_binder_info());
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}
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environment cast_variables_cmd(parser & p) {
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check_in_section(p);
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return variables_cmd_core(p, false, mk_cast_binder_info());
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}
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// Collect local (section) constants occurring in type and value, sort them, and store in section_ps
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static void collect_section_locals(expr const & type, expr const & value, parser const & p, buffer<parameter> & section_ps) {
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name_set ls = collect_locals(type, collect_locals(value));
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ls.for_each([&](name const & n) {
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section_ps.push_back(*p.get_local(n));
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});
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std::sort(section_ps.begin(), section_ps.end(), [&](parameter const & p1, parameter const & p2) {
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return p.get_local_index(mlocal_name(p1.m_local)) < p.get_local_index(mlocal_name(p2.m_local));
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});
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}
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static void parse_modifiers(parser & p, bool & is_private, bool & is_opaque) {
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while (true) {
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if (p.curr_is_token(g_private)) {
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is_private = true;
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p.next();
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} else if (p.curr_is_token(g_inline)) {
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is_opaque = false;
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p.next();
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} else {
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break;
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}
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}
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}
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// Wrap \c e with the "explicit macro", the idea is to inform the elaborator
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// preprocessor, that we do not need create metavariables for implicit arguments
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static expr mark_explicit(expr const & e) {
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// TODO(Leo)
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return e;
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}
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environment definition_cmd_core(parser & p, bool is_theorem, bool is_opaque) {
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bool is_private = false;
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parse_modifiers(p, is_private, is_opaque);
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if (is_theorem && !is_opaque)
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throw exception("invalid theorem declaration, theorems cannot be transparent");
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name n = p.check_id_next("invalid declaration, identifier expected");
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check_atomic(n);
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environment env = p.env();
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name real_n; // real name for this declaration
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if (is_private) {
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auto env_n = add_private_name(env, n, optional<unsigned>(hash(p.pos().first, p.pos().second)));
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env = env_n.first;
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real_n = env_n.second;
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} else {
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name const & ns = get_namespace(env);
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real_n = ns + n;
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}
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buffer<name> ls_buffer;
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expr type, value;
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level_param_names ls;
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{
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parser::local_scope scope1(p);
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parse_univ_params(p, ls_buffer);
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if (!p.curr_is_token(g_colon)) {
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buffer<parameter> ps;
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optional<local_environment> lenv;
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{
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parser::param_universe_scope scope2(p);
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lenv = p.parse_binders(ps);
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p.check_token_next(g_colon, "invalid declaration, ':' expected");
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type = p.parse_scoped_expr(ps, *lenv);
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}
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p.check_token_next(g_assign, "invalid declaration, ':=' expected");
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value = p.parse_scoped_expr(ps, *lenv);
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type = p.pi_abstract(ps, type);
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value = p.lambda_abstract(ps, value);
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} else {
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p.next();
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{
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parser::param_universe_scope scope2(p);
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type = p.parse_expr();
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}
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p.check_token_next(g_assign, "invalid declaration, ':=' expected");
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value = p.parse_expr();
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}
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update_parameters(ls_buffer, collect_univ_params(value, collect_univ_params(type)), p);
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ls = to_list(ls_buffer.begin(), ls_buffer.end());
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}
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if (in_section(env)) {
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buffer<parameter> section_ps;
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collect_section_locals(type, value, p, section_ps);
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type = p.pi_abstract(section_ps, type);
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value = p.lambda_abstract(section_ps, value);
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buffer<level> section_ls_buffer;
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for (name const & l : ls) {
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if (p.get_local_level_index(l))
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section_ls_buffer.push_back(mk_param_univ(l));
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else
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break;
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}
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levels section_ls = to_list(section_ls_buffer.begin(), section_ls_buffer.end());
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buffer<expr> section_args;
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for (auto const & p : section_ps)
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section_args.push_back(p.m_local);
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expr ref = mk_app(mark_explicit(mk_constant(real_n, section_ls)), section_args);
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p.add_local_expr(n, ref);
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} else {
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if (real_n != n)
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env = add_alias(env, n, mk_constant(real_n));
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}
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if (is_theorem) {
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// TODO(Leo): delay theorems
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auto type_value = p.elaborate(type, value, ls);
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type = type_value.first;
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value = type_value.second;
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env = module::add(env, check(env, mk_theorem(real_n, ls, type, value)));
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} else {
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auto type_value = p.elaborate(type, value, ls);
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type = type_value.first;
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value = type_value.second;
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env = module::add(env, check(env, mk_definition(env, real_n, ls, type, value, is_opaque)));
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}
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return env;
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}
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environment definition_cmd(parser & p) {
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return definition_cmd_core(p, false, true);
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}
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environment abbreviation_cmd(parser & p) {
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return definition_cmd_core(p, false, false);
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}
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environment theorem_cmd(parser & p) {
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return definition_cmd_core(p, true, true);
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}
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environment print_cmd(parser & p) {
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if (p.curr() == scanner::token_kind::String) {
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p.regular_stream() << p.get_str_val() << endl;
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p.next();
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} else if (p.curr_is_token_or_id(g_raw)) {
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p.next();
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expr e = p.parse_expr();
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p.regular_stream() << e << endl;
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} else if (p.curr_is_token_or_id(g_options)) {
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p.next();
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p.regular_stream() << p.ios().get_options() << endl;
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} else {
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throw parser_error("invalid print command", p.pos());
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}
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return p.env();
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}
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environment section_cmd(parser & p) {
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p.push_local_scope();
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return push_scope(p.env(), p.ios());
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}
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environment namespace_cmd(parser & p) {
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name n = p.check_id_next("invalid namespace declaration, identifier expected");
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check_atomic(n);
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return push_scope(p.env(), p.ios(), n);
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}
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environment end_scoped_cmd(parser & p) {
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if (in_section(p.env()))
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p.pop_local_scope();
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return pop_scope(p.env());
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}
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environment check_cmd(parser & p) {
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expr e = p.parse_expr();
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level_param_names ls = to_level_param_names(collect_univ_params(e));
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e = p.elaborate(e, ls);
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expr type = type_checker(p.env()).check(e, ls);
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p.regular_stream() << e << " : " << type << endl;
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return p.env();
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}
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environment set_line_cmd(parser & p) {
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if (!p.curr_is_numeral())
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throw parser_error("invalid #setline command, numeral expected", p.pos());
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unsigned r = p.get_small_nat();
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p.set_line(r);
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p.next();
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return p.env();
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}
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environment exit_cmd(parser &) {
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throw interrupt_parser();
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}
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environment set_option_cmd(parser & p) {
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auto id_pos = p.pos();
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name id = p.check_id_next("invalid set option, identifier (i.e., option name) expected");
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auto decl_it = get_option_declarations().find(id);
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if (decl_it == get_option_declarations().end()) {
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// add "lean" prefix
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name lean_id = name("lean") + id;
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decl_it = get_option_declarations().find(lean_id);
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if (decl_it == get_option_declarations().end()) {
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throw parser_error(sstream() << "unknown option '" << id << "', type 'help options.' for list of available options", id_pos);
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} else {
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id = lean_id;
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}
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}
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option_kind k = decl_it->second.kind();
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if (k == BoolOption) {
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if (p.curr_is_token_or_id(g_true))
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p.set_option(id, true);
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else if (p.curr_is_token_or_id(g_false))
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p.set_option(id, false);
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else
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throw parser_error("invalid Boolean option value, 'true' or 'false' expected", p.pos());
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p.next();
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} else if (k == StringOption) {
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if (!p.curr_is_string())
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throw parser_error("invalid option value, given option is not a string", p.pos());
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p.set_option(id, p.get_str_val());
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p.next();
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} else if (k == DoubleOption) {
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p.set_option(id, p.parse_double());
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} else if (k == UnsignedOption || k == IntOption) {
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p.set_option(id, p.parse_small_nat());
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} else {
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throw parser_error("invalid option value, 'true', 'false', string, integer or decimal value expected", p.pos());
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}
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p.updt_options();
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return p.env();
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}
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static name parse_class(parser & p) {
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if (p.curr_is_token(g_lbracket)) {
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p.next();
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name n;
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if (p.curr_is_identifier())
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n = p.get_name_val();
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else if (p.curr_is_keyword() || p.curr_is_command())
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n = p.get_token_info().value();
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else
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throw parser_error("invalid 'using' command, identifier or symbol expected", p.pos());
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p.next();
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p.check_token_next(g_rbracket, "invalid 'using' command, ']' expected");
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return n;
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} else {
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return name();
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}
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}
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static void check_identifier(parser & p, environment const & env, name const & ns, name const & id) {
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name full_id = ns + id;
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if (!env.find(full_id))
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throw parser_error(sstream() << "invalid 'using' command, unknown declaration '" << full_id << "'", p.pos());
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}
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// using [class] id (id ...) (renaming id->id id->id) (hiding id ... id)
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environment using_cmd(parser & p) {
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environment env = p.env();
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name cls = parse_class(p);
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bool decls = cls.is_anonymous() || cls == g_decls || cls == g_declarations;
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name ns = p.check_id_next("invalid 'using' command, identifier expected");
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env = using_namespace(env, p.ios(), ns, cls);
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if (decls) {
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// Remark: we currently to not allow renaming and hiding of universe levels
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buffer<name> exceptions;
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bool found_explicit = false;
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while (p.curr_is_token(g_lparen)) {
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p.next();
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if (p.curr_is_token_or_id(g_renaming)) {
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p.next();
|
|
while (p.curr_is_identifier()) {
|
|
name from_id = p.get_name_val();
|
|
p.next();
|
|
p.check_token_next(g_arrow, "invalid 'using' command renaming, '->' expected");
|
|
name to_id = p.check_id_next("invalid 'using' command renaming, identifier expected");
|
|
check_identifier(p, env, ns, from_id);
|
|
exceptions.push_back(from_id);
|
|
env = add_alias(env, to_id, mk_constant(ns+from_id));
|
|
}
|
|
} else if (p.curr_is_token_or_id(g_hiding)) {
|
|
p.next();
|
|
while (p.curr_is_identifier()) {
|
|
name id = p.get_name_val();
|
|
p.next();
|
|
check_identifier(p, env, ns, id);
|
|
exceptions.push_back(id);
|
|
}
|
|
} else if (p.curr_is_identifier()) {
|
|
found_explicit = true;
|
|
while (p.curr_is_identifier()) {
|
|
name id = p.get_name_val();
|
|
p.next();
|
|
check_identifier(p, env, ns, id);
|
|
env = add_alias(env, id, mk_constant(ns+id));
|
|
}
|
|
} else {
|
|
throw parser_error("invalid 'using' command option, identifier, 'hiding' or 'renaming' expected", p.pos());
|
|
}
|
|
if (found_explicit && !exceptions.empty())
|
|
throw parser_error("invalid 'using' command option, mixing explicit and implicit 'using' options", p.pos());
|
|
p.check_token_next(g_rparen, "invalid 'using' command option, ')' expected");
|
|
}
|
|
if (!found_explicit)
|
|
env = add_aliases(env, ns, name(), exceptions.size(), exceptions.data());
|
|
}
|
|
return env;
|
|
}
|
|
|
|
cmd_table init_cmd_table() {
|
|
cmd_table r;
|
|
add_cmd(r, cmd_info("using", "create aliases for declarations, and use objects defined in other namespaces", using_cmd));
|
|
add_cmd(r, cmd_info("set_option", "set configuration option", set_option_cmd));
|
|
add_cmd(r, cmd_info("exit", "exit", exit_cmd));
|
|
add_cmd(r, cmd_info("print", "print a string", print_cmd));
|
|
add_cmd(r, cmd_info("universe", "declare a global universe level", universe_cmd));
|
|
add_cmd(r, cmd_info("section", "open a new section", section_cmd));
|
|
add_cmd(r, cmd_info("namespace", "open a new namespace", namespace_cmd));
|
|
add_cmd(r, cmd_info("end", "close the current namespace/section", end_scoped_cmd));
|
|
add_cmd(r, cmd_info("variable", "declare a new parameter", variable_cmd));
|
|
add_cmd(r, cmd_info("{variable}", "declare a new implict parameter", implicit_variable_cmd));
|
|
add_cmd(r, cmd_info("[variable]", "declare a new cast parameter", cast_variable_cmd));
|
|
add_cmd(r, cmd_info("axiom", "declare a new axiom", axiom_cmd));
|
|
add_cmd(r, cmd_info("{axiom}", "declare a new implicit axiom", implicit_axiom_cmd));
|
|
add_cmd(r, cmd_info("variables", "declare new parameters", variables_cmd));
|
|
add_cmd(r, cmd_info("{variables}", "declare new implict parameters", implicit_variables_cmd));
|
|
add_cmd(r, cmd_info("[variables]", "declare new cast parameters", cast_variables_cmd));
|
|
add_cmd(r, cmd_info("definition", "add new definition", definition_cmd));
|
|
add_cmd(r, cmd_info("abbreviation", "add new abbreviation (aka transparent definition)", abbreviation_cmd));
|
|
add_cmd(r, cmd_info("theorem", "add new theorem", theorem_cmd));
|
|
add_cmd(r, cmd_info("check", "type check given expression, and display its type", check_cmd));
|
|
add_cmd(r, cmd_info("precedence", "set token left binding power", precedence_cmd));
|
|
add_cmd(r, cmd_info("infixl", "declare a new infix (left) notation", infixl_cmd));
|
|
add_cmd(r, cmd_info("infix", "declare a new infix (left) notation", infixl_cmd));
|
|
add_cmd(r, cmd_info("infixr", "declare a new infix (right) notation", infixr_cmd));
|
|
add_cmd(r, cmd_info("postfix", "declare a new postfix notation", postfix_cmd));
|
|
add_cmd(r, cmd_info("notation", "declare a new notation", notation_cmd));
|
|
add_cmd(r, cmd_info("#setline", "modify the current line number, it only affects error/report messages", set_line_cmd));
|
|
register_calc_cmds(r);
|
|
return r;
|
|
}
|
|
|
|
cmd_table get_builtin_cmds() {
|
|
static optional<cmd_table> r;
|
|
if (!r)
|
|
r = init_cmd_table();
|
|
return *r;
|
|
}
|
|
}
|