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/****************************************************************************** |
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* Top contributors (to current version): |
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* Dejan Jovanovic, Andrew Reynolds, Tim King |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Rewriter for the theory of arithmetic. |
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* |
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* This rewrites to the normal form for arithmetic. |
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* See theory/arith/normal_form.h for more information. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__ARITH__ARITH_REWRITER_H |
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#define CVC5__THEORY__ARITH__ARITH_REWRITER_H |
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#include "theory/arith/rewrites.h" |
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#include "theory/theory_rewriter.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace arith { |
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class OperatorElim; |
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class ArithRewriter : public TheoryRewriter |
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{ |
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public: |
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ArithRewriter(OperatorElim& oe); |
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RewriteResponse preRewrite(TNode n) override; |
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RewriteResponse postRewrite(TNode n) override; |
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/** |
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* Expand definition, which eliminates extended operators like div/mod in |
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* the given node. |
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*/ |
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TrustNode expandDefinition(Node node) override; |
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private: |
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static Node makeSubtractionNode(TNode l, TNode r); |
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static Node makeUnaryMinusNode(TNode n); |
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static RewriteResponse preRewriteTerm(TNode t); |
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static RewriteResponse postRewriteTerm(TNode t); |
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static RewriteResponse rewriteVariable(TNode t); |
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static RewriteResponse rewriteConstant(TNode t); |
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static RewriteResponse rewriteMinus(TNode t, bool pre); |
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static RewriteResponse rewriteUMinus(TNode t, bool pre); |
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static RewriteResponse rewriteDiv(TNode t, bool pre); |
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static RewriteResponse rewriteIntsDivMod(TNode t, bool pre); |
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static RewriteResponse rewriteIntsDivModTotal(TNode t, bool pre); |
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static RewriteResponse preRewritePlus(TNode t); |
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static RewriteResponse postRewritePlus(TNode t); |
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static RewriteResponse preRewriteMult(TNode t); |
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static RewriteResponse postRewriteMult(TNode t); |
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static RewriteResponse postRewriteIAnd(TNode t); |
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static RewriteResponse postRewritePow2(TNode t); |
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static RewriteResponse preRewriteTranscendental(TNode t); |
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static RewriteResponse postRewriteTranscendental(TNode t); |
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static RewriteResponse preRewriteAtom(TNode t); |
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static RewriteResponse postRewriteAtom(TNode t); |
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static bool isAtom(TNode n); |
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static inline bool isTerm(TNode n) { |
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return !isAtom(n); |
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} |
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/** return rewrite */ |
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static RewriteResponse returnRewrite(TNode t, Node ret, Rewrite r); |
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/** The operator elimination utility */ |
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OperatorElim& d_opElim; |
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}; /* class ArithRewriter */ |
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} // namespace arith |
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} // namespace theory |
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} // namespace cvc5 |
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#endif /* CVC5__THEORY__ARITH__ARITH_REWRITER_H */ |