46 lines
1.4 KiB
C++
46 lines
1.4 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 "kernel/type_checker.h"
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#include "kernel/environment.h"
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#include "library/module.h"
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namespace lean {
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static name * g_sorry_name = nullptr;
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static name * g_l = nullptr;
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static expr * g_sorry_type = nullptr;
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void initialize_sorry() {
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g_sorry_name = new name("sorry");
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g_l = new name("l");
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g_sorry_type = new expr(mk_pi("A", mk_sort(mk_param_univ(*g_l)), mk_var(0), binder_info(true)));
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}
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void finalize_sorry() {
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delete g_sorry_type;
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delete g_l;
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delete g_sorry_name;
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}
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bool has_sorry(environment const & env) {
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auto decl = env.find(*g_sorry_name);
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return decl && decl->get_type() == *g_sorry_type;
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}
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environment declare_sorry(environment const & env) {
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if (auto decl = env.find(*g_sorry_name)) {
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if (decl->get_type() != *g_sorry_type)
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throw exception("failed to declare 'sorry', environment already has an object named 'sorry'");
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return env;
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} else {
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return module::add(env, check(env, mk_constant_assumption(*g_sorry_name, list<name>(*g_l), *g_sorry_type)));
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}
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}
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expr mk_sorry() { return mk_constant(*g_sorry_name); }
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name const & get_sorry_name() { return *g_sorry_name; }
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bool is_sorry(expr const & e) { return is_constant(e) && const_name(e) == get_sorry_name(); }
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}
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