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//////////////////////////////////////////////////////////////////////////
//
// pgScript - PostgreSQL Tools
//
// Copyright (C) 2002 - 2014, The pgAdmin Development Team
// This software is released under the PostgreSQL Licence
//
//////////////////////////////////////////////////////////////////////////
#ifndef PGSVARIABLE_H_
#define PGSVARIABLE_H_
#include "pgscript/pgScript.h"
#include "pgscript/utilities/pgsMapm.h"
#include "pgscript/expressions/pgsExpression.h"
class pgsNumber;
class pgsRecord;
class pgsString;
class pgsVariable : public pgsExpression
{
friend pgsOperand operator+(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator-(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator*(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator/(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator%(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator==(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator!=(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator<(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator>(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator<=(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator>=(const pgsVariable &lhs, const pgsVariable &rhs);
friend pgsOperand operator!(const pgsVariable &lhs);
friend pgsOperand operator&=(const pgsVariable &lhs, const pgsVariable &rhs);
public:
virtual pgsOperand pgs_plus(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_minus(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_times(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_over(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_modulo(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_equal(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_different(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_greater(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_lower(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_lower_equal(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_greater_equal(const pgsVariable &rhs) const = 0;
virtual pgsOperand pgs_not() const = 0;
virtual bool pgs_is_true() const = 0;
virtual pgsOperand pgs_almost_equal(const pgsVariable &rhs) const = 0;
public:
enum pgsTypes
{
pgsTReal, pgsTInt, pgsTString, pgsTRecord
};
protected:
pgsVariable(const pgsTypes &type);
pgsTypes m_type;
public:
virtual ~pgsVariable();
virtual pgsVariable *clone() const = 0;
/* pgsVariable(const pgsVariable & that); */
/* pgsVariable & operator =(const pgsVariable & that); */
static MAPM num(const pgsOperand &var);
static MAPM num(const wxString &var);
public:
virtual wxString value() const = 0;
virtual pgsOperand eval(pgsVarMap &vars) const = 0;
public:
bool is_number() const;
bool is_integer() const;
bool is_real() const;
bool is_string() const;
bool is_record() const;
const pgsTypes &type() const;
public:
virtual pgsNumber number() const = 0;
virtual pgsRecord record() const = 0;
virtual pgsString string() const = 0;
};
#endif /*PGSVARIABLE_H_*/
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