35 lines
1 KiB
C++
35 lines
1 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("sorry");
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static expr g_sorry(mk_constant(g_sorry_name));
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static name g_l("l");
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static expr g_sorry_type(mk_pi("A", mk_sort(mk_param_univ(g_l)), mk_var(0), binder_info(true)));
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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_var_decl(g_sorry_name, list<name>(g_l), g_sorry_type)));
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}
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}
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expr const & get_sorry_constant() {
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return g_sorry;
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}
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}
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