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/********************* */
/*! \file expr_iomanip.h
** \verbatim
** Top contributors (to current version):
** Tim King, Paul Meng
** This file is part of the CVC4 project.
** Copyright (c) 2009-2017 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.\endverbatim
**
** \brief Expr IO manipulation classes.
**
** Expr IO manipulation classes.
**/
#include "cvc4_public.h"
#ifndef __CVC4__EXPR__EXPR_IOMANIP_H
#define __CVC4__EXPR__EXPR_IOMANIP_H
#include <iosfwd>
namespace CVC4 {
namespace expr {
/**
* IOStream manipulator to set the maximum depth of Exprs when
* pretty-printing. -1 means print to any depth. E.g.:
*
* // let a, b, c, and d be VARIABLEs
* Expr e = em->mkExpr(OR, a, b, em->mkExpr(AND, c, em->mkExpr(NOT, d)))
* out << setdepth(3) << e;
*
* gives "(OR a b (AND c (NOT d)))", but
*
* out << setdepth(1) << [same expr as above]
*
* gives "(OR a b (...))".
*
* The implementation of this class serves two purposes; it holds
* information about the depth setting (such as the index of the
* allocated word in ios_base), and serves also as the manipulator
* itself (as above).
*/
class CVC4_PUBLIC ExprSetDepth {
public:
/**
* Construct a ExprSetDepth with the given depth.
*/
ExprSetDepth(long depth);
void applyDepth(std::ostream& out);
static long getDepth(std::ostream& out);
static void setDepth(std::ostream& out, long depth);
/**
* Set the expression depth on the output stream for the current
* stack scope. This makes sure the old depth is reset on the stream
* after normal OR exceptional exit from the scope, using the RAII
* C++ idiom.
*/
class Scope {
public:
Scope(std::ostream& out, long depth);
~Scope();
private:
std::ostream& d_out;
long d_oldDepth;
};/* class ExprSetDepth::Scope */
private:
/**
* The allocated index in ios_base for our depth setting.
*/
static const int s_iosIndex;
/**
* The default depth to print, for ostreams that haven't yet had a
* setdepth() applied to them.
*/
static const int s_defaultPrintDepth = -1;
/**
* When this manipulator is used, the depth is stored here.
*/
long d_depth;
};/* class ExprSetDepth */
/**
* IOStream manipulator to print type ascriptions or not.
*
* // let a, b, c, and d be variables of sort U
* Expr e = em->mkExpr(OR, a, b, em->mkExpr(AND, c, em->mkExpr(NOT, d)))
* out << e;
*
* gives "(OR a:U b:U (AND c:U (NOT d:U)))", but
*/
class CVC4_PUBLIC ExprPrintTypes {
public:
/**
* Construct a ExprPrintTypes with the given setting.
*/
ExprPrintTypes(bool printTypes);
void applyPrintTypes(std::ostream& out);
static bool getPrintTypes(std::ostream& out);
static void setPrintTypes(std::ostream& out, bool printTypes);
/**
* Set the print-types state on the output stream for the current
* stack scope. This makes sure the old state is reset on the
* stream after normal OR exceptional exit from the scope, using the
* RAII C++ idiom.
*/
class Scope {
public:
Scope(std::ostream& out, bool printTypes);
~Scope();
private:
std::ostream& d_out;
bool d_oldPrintTypes;
};/* class ExprPrintTypes::Scope */
private:
/**
* The allocated index in ios_base for our setting.
*/
static const int s_iosIndex;
/**
* When this manipulator is used, the setting is stored here.
*/
bool d_printTypes;
};/* class ExprPrintTypes */
/**
* IOStream manipulator to print expressions as a dag (or not).
*/
class CVC4_PUBLIC ExprDag {
public:
/**
* Construct a ExprDag with the given setting (dagification on or off).
*/
explicit ExprDag(bool dag);
/**
* Construct a ExprDag with the given setting (letify only common
* subexpressions that appear more than 'dag' times). dag <= 0 means
* don't dagify.
*/
explicit ExprDag(int dag);
void applyDag(std::ostream& out);
static size_t getDag(std::ostream& out);
static void setDag(std::ostream& out, size_t dag);
/**
* Set the dag state on the output stream for the current
* stack scope. This makes sure the old state is reset on the
* stream after normal OR exceptional exit from the scope, using the
* RAII C++ idiom.
*/
class Scope {
public:
Scope(std::ostream& out, size_t dag);
~Scope();
private:
std::ostream& d_out;
size_t d_oldDag;
};/* class ExprDag::Scope */
private:
/**
* The allocated index in ios_base for our setting.
*/
static const int s_iosIndex;
/**
* The default setting, for ostreams that haven't yet had a
* dag() applied to them.
*/
static const size_t s_defaultDag = 1;
/**
* When this manipulator is used, the setting is stored here.
*/
size_t d_dag;
};/* class ExprDag */
/**
* Sets the default dag setting when pretty-printing a Expr to an ostream.
* Use like this:
*
* // let out be an ostream, e an Expr
* out << Expr::dag(true) << e << endl;
*
* The setting stays permanently (until set again) with the stream.
*/
std::ostream& operator<<(std::ostream& out, ExprDag d) CVC4_PUBLIC;
/**
* Sets the default print-types setting when pretty-printing an Expr
* to an ostream. Use like this:
*
* // let out be an ostream, e an Expr
* out << Expr::printtypes(true) << e << endl;
*
* The setting stays permanently (until set again) with the stream.
*/
std::ostream& operator<<(std::ostream& out, ExprPrintTypes pt) CVC4_PUBLIC;
/**
* Sets the default depth when pretty-printing a Expr to an ostream.
* Use like this:
*
* // let out be an ostream, e an Expr
* out << Expr::setdepth(n) << e << endl;
*
* The depth stays permanently (until set again) with the stream.
*/
std::ostream& operator<<(std::ostream& out, ExprSetDepth sd) CVC4_PUBLIC;
}/* namespace CVC4::expr */
}/* CVC4 namespace */
#endif /* __CVC4__EXPR__EXPR_IOMANIP_H */
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