51aee83b70
This modification was motivated by a bug exposed by tst17 at tests/kernel/type_checker. metavar_env is now a smart point to metavar_env_cell. ro_metavar_env is a read-only smart pointer. It is useful to make sure we are using proof_state correctly. example showing that the approach for caching metavar_env is broken in the type_checker Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
20 lines
514 B
C++
20 lines
514 B
C++
/*
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Copyright (c) 2013 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 "kernel/metavar.h"
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namespace lean {
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/**
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\brief Wrapper for metavar_env that only allows us to access the assignment.
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*/
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class assignment {
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metavar_env m_menv;
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public:
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assignment(metavar_env const & menv):m_menv(menv) {}
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optional<expr> operator()(name const & mvar) const { return m_menv->get_subst(mvar); }
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};
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}
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