63b6564b78
A particular macro definition may use the extra information to retrieve information necessary to expand/type a given macro application. Example: it may need to invoke whnf. Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
33 lines
888 B
C++
33 lines
888 B
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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#pragma once
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#include "util/name.h"
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namespace lean {
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class expr;
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class constraint;
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class environment;
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/**
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\brief Extension context (aka API provided to macro_definitions and normalizer_extensions).
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The extension can request
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1) the environment being used.
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2) the weak head normal form of an expression.
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3) the type of an expression.
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4) a new fresh name.
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5) registration of a new constraint.
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*/
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class extension_context {
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public:
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virtual ~extension_context() {}
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virtual environment const & env() const = 0;
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virtual expr whnf(expr const & e) = 0;
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virtual expr infer_type(expr const & e) = 0;
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virtual name mk_fresh_name() = 0;
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virtual void add_cnstr(constraint const & c) = 0;
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};
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}
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