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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
* in the top-level source directory and their institutional affiliations.
* All rights reserved. See the file COPYING in the top-level source
* directory for licensing information.
* ****************************************************************************
*
* Print channels for LFSC proofs.
*/
#include "cvc5_private.h"
#ifndef CVC4__PROOF__LFSC__LFSC_PRINT_CHANNEL_H
#define CVC4__PROOF__LFSC__LFSC_PRINT_CHANNEL_H
#include <iostream>
#include <map>
#include "expr/node.h"
#include "printer/let_binding.h"
#include "proof/lfsc/lfsc_util.h"
#include "proof/proof_node.h"
namespace cvc5 {
namespace proof {
/**
* LFSC proofs are printed in two phases: the first phase computes the
* letification of terms in the proof as well as other information that is
* required for printing the preamble of the proof. The second phase prints the
* proof to an output stream. This is the base class for these two phases.
*/
class LfscPrintChannel
{
public:
LfscPrintChannel() {}
virtual ~LfscPrintChannel() {}
/** Print node n */
virtual void printNode(TNode n) {}
/** Print type node n */
virtual void printTypeNode(TypeNode tn) {}
/** Print a hole */
virtual void printHole() {}
/**
* Print an application of the trusting the result res, whose source is the
* given proof rule.
*/
virtual void printTrust(TNode res, PfRule src) {}
/** Print the opening of the rule of proof rule pn, e.g. "(and_elim ". */
virtual void printOpenRule(const ProofNode* pn) {}
/** Print the opening of LFSC rule lr, e.g. "(cong " */
virtual void printOpenLfscRule(LfscRule lr) {}
/** Print the closing of # nparen proof rules */
virtual void printCloseRule(size_t nparen = 1) {}
/** Print a letified proof with the given identifier */
virtual void printProofId(size_t id) {}
/** Print a proof assumption with the given identifier */
virtual void printAssumeId(size_t id) {}
/** Print an end line */
virtual void printEndLine() {}
};
/** Prints the proof to output stream d_out */
class LfscPrintChannelOut : public LfscPrintChannel
{
public:
LfscPrintChannelOut(std::ostream& out);
void printNode(TNode n) override;
void printTypeNode(TypeNode tn) override;
void printHole() override;
void printTrust(TNode res, PfRule src) override;
void printOpenRule(const ProofNode* pn) override;
void printOpenLfscRule(LfscRule lr) override;
void printCloseRule(size_t nparen = 1) override;
void printProofId(size_t id) override;
void printAssumeId(size_t id) override;
void printEndLine() override;
//------------------- helper methods
/**
* Print node to stream in the expected format of LFSC.
*/
static void printNodeInternal(std::ostream& out, Node n);
/**
* Print type node to stream in the expected format of LFSC.
*/
static void printTypeNodeInternal(std::ostream& out, TypeNode tn);
static void printRule(std::ostream& out, const ProofNode* pn);
static void printId(std::ostream& out, size_t id);
static void printProofId(std::ostream& out, size_t id);
static void printAssumeId(std::ostream& out, size_t id);
//------------------- end helper methods
private:
/**
* Replaces "(_ " with "(" to eliminate indexed symbols
* Replaces "__LFSC_TMP" with ""
*/
static void cleanSymbols(std::string& s);
/** The output stream */
std::ostream& d_out;
};
/**
* Run on the proof before it is printed, and does two preparation steps:
* - Computes the letification of nodes that appear in the proof.
* - Computes the set of DSL rules that appear in the proof.
*/
class LfscPrintChannelPre : public LfscPrintChannel
{
public:
LfscPrintChannelPre(LetBinding& lbind);
void printNode(TNode n) override;
void printTrust(TNode res, PfRule src) override;
void printOpenRule(const ProofNode* pn) override;
private:
/** The let binding */
LetBinding& d_lbind;
};
} // namespace proof
} // namespace cvc5
#endif
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