31 lines
832 B
C++
31 lines
832 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 "expr.h"
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#include "name_set.h"
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namespace lean {
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class environment;
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/**
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\brief Return true iff the given expression is of the form:
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((fun (x : A), B) Arg)
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*/
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bool is_head_beta(expr const & e);
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/** \brief Apply head beta-reduction to the given expression. */
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expr head_beta(expr const & e);
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/**
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\brief Try to reduce the head of the given expression.
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The following reductions are tried:
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1- Beta reduction
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2- Constant unfolding (if constant is defined in env, and defs ==
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nullptr or it contains constant).
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3- Let expansion
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*/
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expr head_reduce(expr const & e, environment const & env, name_set const * defs = nullptr);
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};
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