exprResultDelayed.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2012-2018 Bernhard Gschaider
    Copyright (C) 2019-2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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    You should have received a copy of the GNU General Public License
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Class
    Foam::expressions::exprResultDelayed
 
Description
    An exprResult with an additional delay before evaluation
 
    \heading Dictionary parameters
    \table
        Property    | Description                           | Required | Default
        name        | The result name                       | yes |
        delay       | The delay before starting             | yes |
        storeInterval | The storage interval (time)         | yes |
        startupValue | The initial startup value            | yes |
        value        | The expression result (dictionary)   | no  |
        storedValues | The list of stored values            | yes |
    \endtable
 
SourceFiles
    exprResultDelayed.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_expressions_exprResultDelayed_H
#define Foam_expressions_exprResultDelayed_H
 
#include "exprResult.H"
#include "exprString.H"
#include "Tuple2.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace expressions
{
 
/*---------------------------------------------------------------------------*\
                      Class exprResultDelayed Declaration
\*---------------------------------------------------------------------------*/
 
class exprResultDelayed
:
    public expressions::exprResult
{
    // Typedefs
 
        //- Expression at a given time value.
        typedef Tuple2<scalar, expressions::exprResult> ValueAtTime;
 
 
    // Private Data
 
        //- The name of the expression
        word name_;
 
        //- The initial value expression
        expressions::exprString startExpr_;
 
        //- The pending result to be set
        expressions::exprResult settingResult_;
 
        //- The old results
        DLList<ValueAtTime> storedValues_;
 
        //- How often values should be stored
        scalar storeInterval_;
 
        //- The size of the delay
        scalar delay_;
 
 
protected:
 
    // Protected Member Functions
 
        //- Simulate virtual templated methods
        inline expressions::exprResult& target() { return settingResult_; }
 
 
public:
 
    //- Runtime type information
    TypeNameNoDebug("exprResultDelayed");
 
 
    // Constructors
 
        //- Default construct
        exprResultDelayed();
 
        //- Copy construct
        exprResultDelayed(const exprResultDelayed&);
 
        //- Construct from a dictionary
        exprResultDelayed(const dictionary& dict);
 
        //- Clone
        virtual autoPtr<exprResult> clone() const
        {
            return autoPtr<exprResult>
            (
                new exprResultDelayed(*this)
            );
        }
 
 
    //- Destructor
    virtual ~exprResultDelayed() = default;
 
 
    // Member Functions
 
        //- The expression name
        const word& name() const noexcept
        {
            return name_;
        }
 
        //- The initial value expression
        const expressions::exprString& startupValueExpression() const noexcept
        {
            return startExpr_;
        }
 
        //- Update the read-value
        //  return true if there was a valid value.
        //  this does not do the work of setReadValue because we have no
        //  access to the Parser
        bool updateReadValue(const scalar& timeVal);
 
        //- Set the readValue with a calculated value
        void setReadValue(const exprResult& val);
 
        //- Add a stored value
        void storeValue(const scalar& timeVal);
 
 
    // Write
 
        void writeDict(Ostream& os) const;
 
 
    // Member Operators
 
        //- Copy assignment
        void operator=(const exprResultDelayed& rhs);
 
        //- Copy assignment
        void operator=(const exprResult& rhs);
 
        //- Move assignment
        void operator=(exprResult&& rhs);
 
        //- Compare for inequality (need by Ulist)
        bool operator!=(const exprResultDelayed& rhs) const noexcept
        {
            return (this != &rhs);
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace expressions
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 
// IO Operators
Istream& operator>>(Istream& is, expressions::exprResultDelayed& data);
Ostream& operator<<(Ostream& os, const expressions::exprResultDelayed& data);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //