// Created on: 1992-07-20
// Created by: Arnaud BOUZY
// Copyright (c) 1992-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _ExprIntrp_Generator_HeaderFile
#define _ExprIntrp_Generator_HeaderFile

#include "Standard.hxx"

#include "Expr_NamedFunction.hxx"
#include "NCollection_Sequence.hxx"
#include "Expr_NamedExpression.hxx"
#include "Standard_Transient.hxx"
class Expr_NamedFunction;
class Expr_NamedExpression;
class TCollection_AsciiString;

//! Implements general services for interpretation of
//! expressions.
class ExprIntrp_Generator : public Standard_Transient
{

public:
  Standard_EXPORT void Use(const occ::handle<Expr_NamedFunction>& func);

  Standard_EXPORT void Use(const occ::handle<Expr_NamedExpression>& named);

  Standard_EXPORT const NCollection_Sequence<occ::handle<Expr_NamedExpression>>& GetNamed() const;

  Standard_EXPORT const NCollection_Sequence<occ::handle<Expr_NamedFunction>>& GetFunctions() const;

  //! Returns NamedExpression with name <name> already
  //! interpreted if it exists. Returns a null handle if
  //! not.
  Standard_EXPORT occ::handle<Expr_NamedExpression> GetNamed(
    const TCollection_AsciiString& name) const;

  //! Returns NamedFunction with name <name> already
  //! interpreted if it exists. Returns a null handle if
  //! not.
  Standard_EXPORT occ::handle<Expr_NamedFunction> GetFunction(
    const TCollection_AsciiString& name) const;

  DEFINE_STANDARD_RTTIEXT(ExprIntrp_Generator, Standard_Transient)

protected:
  Standard_EXPORT ExprIntrp_Generator();

private:
  NCollection_Sequence<occ::handle<Expr_NamedFunction>>   myFunctions;
  NCollection_Sequence<occ::handle<Expr_NamedExpression>> myNamed;
};

#endif // _ExprIntrp_Generator_HeaderFile