34 lines
1.5 KiB
C
34 lines
1.5 KiB
C
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/*
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Copyright (c) 2015 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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#pragma once
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#include <memory>
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#include "kernel/environment.h"
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namespace lean {
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/** \brief Auxiliary exception that stores the "real" exception, and a new
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environment that should replace the one in the parser.
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This is a trick to simulate commands that had "partial success".
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Example: we may have failed to type check a proof, but we may have succeeded
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in checking the theorem's type. So, we may store the theorem as an axiom, and
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continue. This feature is useful to avoid a cascade of error messages when
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a heavily useful theorem is broken in the beginning of the file.
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*/
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class update_environment_exception : public exception {
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environment m_env;
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std::shared_ptr<throwable> m_exception;
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public:
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update_environment_exception(environment const & env, std::shared_ptr<throwable> const & ex):
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exception("exception"), m_env(env), m_exception(ex) {}
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virtual ~update_environment_exception() {}
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virtual throwable * clone() const { return new update_environment_exception(m_env, m_exception); }
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virtual void rethrow() const { throw *this; }
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virtual char const * what() const noexcept { return m_exception->what(); }
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throwable const & get_exception() const { return *(m_exception.get()); }
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environment const & get_env() const { return m_env; }
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};
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}
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