516c0c73b9
current compilers have several bugs associated with it We use the simpler __thread (gcc and clang) and __declspec(thread) (visual studio).
276 lines
12 KiB
C++
276 lines
12 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 <unordered_map>
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#include <string>
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#include "util/sstream.h"
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#include "kernel/instantiate.h"
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#include "kernel/type_checker.h"
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#include "library/annotation.h"
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#include "library/string.h"
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#include "library/num.h"
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#include "library/tactic/expr_to_tactic.h"
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#include "library/tactic/apply_tactic.h"
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namespace lean {
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typedef std::unordered_map<name, expr_to_tactic_fn, name_hash, name_eq> expr_to_tactic_map;
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static expr_to_tactic_map * g_map = nullptr;
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expr_to_tactic_map & get_expr_to_tactic_map() {
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return *g_map;
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}
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void register_tac(name const & n, expr_to_tactic_fn const & fn) {
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get_expr_to_tactic_map().insert(mk_pair(n, fn));
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}
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static expr * g_exact_tac_fn = nullptr;
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static expr * g_and_then_tac_fn = nullptr;
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static expr * g_or_else_tac_fn = nullptr;
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static expr * g_repeat_tac_fn = nullptr;
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static expr * g_determ_tac_fn = nullptr;
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static expr * g_tac_type = nullptr;
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static expr * g_builtin_tac = nullptr;
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static expr * g_fixpoint_tac = nullptr;
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expr const & get_exact_tac_fn() { return *g_exact_tac_fn; }
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expr const & get_and_then_tac_fn() { return *g_and_then_tac_fn; }
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expr const & get_or_else_tac_fn() { return *g_or_else_tac_fn; }
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expr const & get_determ_tac_fn() { return *g_determ_tac_fn; }
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expr const & get_repeat_tac_fn() { return *g_repeat_tac_fn; }
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expr const & get_tactic_type() { return *g_tac_type; }
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bool has_tactic_decls(environment const & env) {
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try {
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type_checker tc(env);
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return
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tc.infer(*g_builtin_tac).first == *g_tac_type &&
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tc.infer(*g_and_then_tac_fn).first == *g_tac_type >> (*g_tac_type >> *g_tac_type) &&
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tc.infer(*g_or_else_tac_fn).first == *g_tac_type >> (*g_tac_type >> *g_tac_type) &&
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tc.infer(*g_repeat_tac_fn).first == *g_tac_type >> *g_tac_type;
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} catch (exception &) {
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return false;
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}
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}
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static void throw_failed(expr const & e) {
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throw expr_to_tactic_exception(e, "failed to convert expression into tactic");
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}
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/** \brief Return true if v is the constant tactic.builtin or the constant function that returns tactic.builtin_tactic */
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static bool is_builtin_tactic(expr const & v) {
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if (is_lambda(v))
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return is_builtin_tactic(binding_body(v));
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else if (v == *g_builtin_tac)
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return true;
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else
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return false;
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}
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tactic expr_to_tactic(type_checker & tc, expr e, pos_info_provider const * p) {
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e = tc.whnf(e).first;
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expr f = get_app_fn(e);
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if (!is_constant(f))
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throw_failed(e);
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optional<declaration> it = tc.env().find(const_name(f));
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if (!it || !it->is_definition())
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throw_failed(e);
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expr v = it->get_value();
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if (is_builtin_tactic(v)) {
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auto const & map = get_expr_to_tactic_map();
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auto it2 = map.find(const_name(f));
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if (it2 != map.end())
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return it2->second(tc, e, p);
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else
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throw expr_to_tactic_exception(e, sstream() << "implementation for builtin tactic '" << const_name(f) << "' was not found");
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} else {
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// unfold definition
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buffer<expr> locals;
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get_app_rev_args(e, locals);
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level_param_names const & ps = it->get_univ_params();
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levels ls = const_levels(f);
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unsigned num_ps = length(ps);
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unsigned num_ls = length(ls);
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if (num_ls > num_ps)
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throw expr_to_tactic_exception(e, sstream() << "invalid number of universes");
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if (num_ls < num_ps) {
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buffer<level> extra_ls;
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name_generator ngen = tc.mk_ngen();
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for (unsigned i = num_ls; i < num_ps; i++)
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extra_ls.push_back(mk_meta_univ(ngen.next()));
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ls = append(ls, to_list(extra_ls.begin(), extra_ls.end()));
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}
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v = instantiate_univ_params(v, ps, ls);
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v = apply_beta(v, locals.size(), locals.data());
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return expr_to_tactic(tc, v, p);
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}
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}
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static name * g_tmp_prefix = nullptr;
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LEAN_THREAD_VALUE(unsigned, g_expr_tac_id, 0);
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static name_generator next_name_generator() {
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unsigned r = g_expr_tac_id;
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g_expr_tac_id++;
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return name_generator(name(*g_tmp_prefix, r));
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}
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tactic expr_to_tactic(environment const & env, expr const & e, pos_info_provider const * p) {
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type_checker tc(env, next_name_generator());
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return expr_to_tactic(tc, e, p);
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}
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tactic fixpoint(expr const & b) {
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return tactic([=](environment const & env, io_state const & ios, proof_state const & s) -> proof_state_seq {
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return expr_to_tactic(env, b, nullptr)(env, ios, s);
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});
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}
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void register_simple_tac(name const & n, std::function<tactic()> f) {
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register_tac(n, [=](type_checker &, expr const & e, pos_info_provider const *) {
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if (!is_constant(e))
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throw expr_to_tactic_exception(e, "invalid constant tactic");
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return f();
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});
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}
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void register_bin_tac(name const & n, std::function<tactic(tactic const &, tactic const &)> f) {
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register_tac(n, [=](type_checker & tc, expr const & e, pos_info_provider const * p) {
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buffer<expr> args;
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get_app_args(e, args);
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if (args.size() != 2)
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throw expr_to_tactic_exception(e, "invalid binary tactic, it must have two arguments");
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return f(expr_to_tactic(tc, args[0], p),
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expr_to_tactic(tc, args[1], p));
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});
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}
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void register_unary_tac(name const & n, std::function<tactic(tactic const &)> f) {
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register_tac(n, [=](type_checker & tc, expr const & e, pos_info_provider const * p) {
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buffer<expr> args;
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get_app_args(e, args);
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if (args.size() != 1)
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throw expr_to_tactic_exception(e, "invalid unary tactic, it must have one argument");
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return f(expr_to_tactic(tc, args[0], p));
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});
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}
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void register_unary_num_tac(name const & n, std::function<tactic(tactic const &, unsigned k)> f) {
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register_tac(n, [=](type_checker & tc, expr const & e, pos_info_provider const * p) {
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buffer<expr> args;
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get_app_args(e, args);
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if (args.size() != 2)
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throw expr_to_tactic_exception(e, "invalid tactic, it must have two arguments");
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tactic t = expr_to_tactic(tc, args[0], p);
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optional<mpz> k = to_num(args[1]);
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if (!k)
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k = to_num(tc.whnf(args[1]).first);
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if (!k)
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throw expr_to_tactic_exception(e, "invalid tactic, second argument must be a numeral");
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if (!k->is_unsigned_int())
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throw expr_to_tactic_exception(e, "invalid tactic, second argument does not fit in a machine unsigned integer");
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return f(t, k->get_unsigned_int());
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});
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}
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static name * g_by_name = nullptr;
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expr mk_by(expr const & e) { return mk_annotation(*g_by_name, e); }
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bool is_by(expr const & e) { return is_annotation(e, *g_by_name); }
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expr const & get_by_arg(expr const & e) { lean_assert(is_by(e)); return get_annotation_arg(e); }
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void initialize_expr_to_tactic() {
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g_tmp_prefix = new name(name::mk_internal_unique_name());
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g_by_name = new name("by");
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register_annotation(*g_by_name);
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g_map = new expr_to_tactic_map();
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name g_tac("tactic");
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name g_builtin_tac_name(g_tac, "builtin");
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name g_exact_tac_name(g_tac, "exact");
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name g_and_then_tac_name(g_tac, "and_then");
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name g_or_else_tac_name(g_tac, "or_else");
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name g_repeat_tac_name(g_tac, "repeat");
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name g_fixpoint_name(g_tac, "fixpoint");
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name g_determ_tac_name(g_tac, "determ");
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g_exact_tac_fn = new expr(Const(g_exact_tac_name));
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g_and_then_tac_fn = new expr(Const(g_and_then_tac_name));
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g_or_else_tac_fn = new expr(Const(g_or_else_tac_name));
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g_repeat_tac_fn = new expr(Const(g_repeat_tac_name));
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g_determ_tac_fn = new expr(Const(g_determ_tac_name));
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g_tac_type = new expr(Const(g_tac));
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g_builtin_tac = new expr(Const(g_builtin_tac_name));
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g_fixpoint_tac = new expr(Const(g_fixpoint_name));
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register_simple_tac(name(g_tac, "id"), []() { return id_tactic(); });
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register_simple_tac(name(g_tac, "now"), []() { return now_tactic(); });
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register_simple_tac(name(g_tac, "assumption"), []() { return assumption_tactic(); });
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register_simple_tac(name(g_tac, "eassumption"), []() { return eassumption_tactic(); });
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register_simple_tac(name(g_tac, "fail"), []() { return fail_tactic(); });
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register_simple_tac(name(g_tac, "beta"), []() { return beta_tactic(); });
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register_bin_tac(g_and_then_tac_name, [](tactic const & t1, tactic const & t2) { return then(t1, t2); });
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register_bin_tac(name(g_tac, "append"), [](tactic const & t1, tactic const & t2) { return append(t1, t2); });
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register_bin_tac(name(g_tac, "interleave"), [](tactic const & t1, tactic const & t2) { return interleave(t1, t2); });
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register_bin_tac(name(g_tac, "par"), [](tactic const & t1, tactic const & t2) { return par(t1, t2); });
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register_bin_tac(g_or_else_tac_name, [](tactic const & t1, tactic const & t2) { return orelse(t1, t2); });
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register_unary_tac(g_repeat_tac_name, [](tactic const & t1) { return repeat(t1); });
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register_tac(name(g_tac, "state"), [](type_checker &, expr const & e, pos_info_provider const * p) {
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if (p)
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if (auto it = p->get_pos_info(e))
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return trace_state_tactic(std::string(p->get_file_name()), *it);
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return trace_state_tactic();
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});
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register_tac(name(g_tac, "trace"), [](type_checker & tc, expr const & e, pos_info_provider const *) {
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buffer<expr> args;
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get_app_args(e, args);
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if (args.size() != 1)
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throw expr_to_tactic_exception(e, "invalid trace tactic, argument expected");
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if (auto str = to_string(args[0]))
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return trace_tactic(*str);
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else if (auto str = to_string(tc.whnf(args[0]).first))
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return trace_tactic(*str);
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else
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throw expr_to_tactic_exception(e, "invalid trace tactic, string value expected");
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});
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register_tac(name(g_tac, "apply"), [](type_checker &, expr const & e, pos_info_provider const *) {
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return apply_tactic(app_arg(e));
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});
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register_tac(g_exact_tac_name, [](type_checker &, expr const & e, pos_info_provider const *) {
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return exact_tactic(app_arg(e));
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});
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register_tac(name(g_tac, "unfold"), [](type_checker &, expr const & e, pos_info_provider const *) {
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expr id = get_app_fn(app_arg(e));
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if (!is_constant(id))
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return fail_tactic();
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else
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return unfold_tactic(const_name(id));
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});
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register_unary_num_tac(name(g_tac, "at_most"), [](tactic const & t, unsigned k) { return take(t, k); });
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register_unary_num_tac(name(g_tac, "discard"), [](tactic const & t, unsigned k) { return discard(t, k); });
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register_unary_num_tac(name(g_tac, "focus_at"), [](tactic const & t, unsigned k) { return focus(t, k); });
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register_unary_num_tac(name(g_tac, "try_for"), [](tactic const & t, unsigned k) { return try_for(t, k); });
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register_tac(g_fixpoint_name, [](type_checker & tc, expr const & e, pos_info_provider const *) {
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if (!is_constant(app_fn(e)))
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throw expr_to_tactic_exception(e, "invalid fixpoint tactic, it must have one argument");
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expr r = tc.whnf(mk_app(app_arg(e), e)).first;
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return fixpoint(r);
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});
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}
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void finalize_expr_to_tactic() {
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delete g_fixpoint_tac;
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delete g_builtin_tac;
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delete g_tac_type;
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delete g_determ_tac_fn;
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delete g_repeat_tac_fn;
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delete g_or_else_tac_fn;
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delete g_and_then_tac_fn;
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delete g_exact_tac_fn;
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delete g_map;
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delete g_by_name;
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delete g_tmp_prefix;
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}
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}
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