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/********************* -*- C++ -*- */
/** expr_builder.h
** This file is part of the CVC4 prototype.
** Copyright (c) 2009 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.
**
**/
#ifndef __CVC4__EXPR_BUILDER_H
#define __CVC4__EXPR_BUILDER_H
#include <vector>
#include "expr_manager.h"
#include "kind.h"
namespace CVC4 {
class AndExprBuilder;
class OrExprBuilder;
class PlusExprBuilder;
class MinusExprBuilder;
class MultExprBuilder;
class ExprBuilder {
ExprManager* d_em;
Kind d_kind;
// initially false, when you extract the Expr this is set and you can't
// extract another
bool d_used;
static const unsigned nchild_thresh = 10;
unsigned d_nchildren;
union {
ExprValue* u_arr[nchild_thresh];
std::vector<Expr>* u_vec;
} d_children;
void addChild(const Expr&);
void addChild(ExprValue*);
void collapse();
typedef ExprValue** ev_iterator;
typedef ExprValue const** const_ev_iterator;
ExprBuilder& reset(const ExprValue*);
public:
ExprBuilder();
ExprBuilder(Kind k);
ExprBuilder(const Expr&);
ExprBuilder(const ExprBuilder&);
ExprBuilder(ExprManager*);
ExprBuilder(ExprManager*, Kind k);
ExprBuilder(ExprManager*, const Expr&);
ExprBuilder(ExprManager*, const ExprBuilder&);
~ExprBuilder();
// Compound expression constructors
ExprBuilder& eqExpr(const Expr& right);
ExprBuilder& notExpr();
ExprBuilder& negate(); // avoid double-negatives
ExprBuilder& andExpr(const Expr& right);
ExprBuilder& orExpr(const Expr& right);
ExprBuilder& iteExpr(const Expr& thenpart, const Expr& elsepart);
ExprBuilder& iffExpr(const Expr& right);
ExprBuilder& impExpr(const Expr& right);
ExprBuilder& xorExpr(const Expr& right);
ExprBuilder& skolemExpr(int i);
ExprBuilder& substExpr(const std::vector<Expr>& oldTerms,
const std::vector<Expr>& newTerms);
/*
ExprBuilder& substExpr(const ExprHashMap<Expr>& oldToNew);
*/
/* TODO design: these modify ExprBuilder */
ExprBuilder& operator!() { return notExpr(); }
ExprBuilder& operator&&(const Expr& right) { return andExpr(right); }
ExprBuilder& operator||(const Expr& right) { return orExpr(right); }
// "Stream" expression constructor syntax
ExprBuilder& operator<<(const Kind& op);
ExprBuilder& operator<<(const Expr& child);
// For pushing sequences of children
ExprBuilder& append(const std::vector<Expr>& children) { return append(children.begin(), children.end()); }
template <class Iterator> ExprBuilder& append(const Iterator& begin, const Iterator& end);
operator Expr();// not const
AndExprBuilder operator&&(Expr);
OrExprBuilder operator||(Expr);
PlusExprBuilder operator+ (Expr);
PlusExprBuilder operator- (Expr);
MultExprBuilder operator* (Expr);
};/* class ExprBuilder */
class AndExprBuilder {
ExprManager* d_em;
public:
AndExprBuilder& operator&&(Expr);
OrExprBuilder operator||(Expr);
operator ExprBuilder();
};/* class AndExprBuilder */
class OrExprBuilder {
ExprManager* d_em;
public:
AndExprBuilder operator&&(Expr);
OrExprBuilder& operator||(Expr);
operator ExprBuilder();
};/* class OrExprBuilder */
class PlusExprBuilder {
ExprManager* d_em;
public:
PlusExprBuilder& operator+(Expr);
PlusExprBuilder& operator-(Expr);
MultExprBuilder operator*(Expr);
operator ExprBuilder();
};/* class PlusExprBuilder */
class MultExprBuilder {
ExprManager* d_em;
public:
PlusExprBuilder operator+(Expr);
PlusExprBuilder operator-(Expr);
MultExprBuilder& operator*(Expr);
operator ExprBuilder();
};/* class MultExprBuilder */
template <class Iterator>
ExprBuilder& ExprBuilder::append(const Iterator& begin, const Iterator& end) {
return *this;
}
}/* CVC4 namespace */
#endif /* __CVC4__EXPR_BUILDER_H */
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