Function1Expression.C

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    Copyright (C) 2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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#include "Function1Expression.H"
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class Type>
Foam::Function1Types::Function1Expression<Type>::Function1Expression
(
    const word& entryName,
    const dictionary& dict
)
:
    Function1<Type>(entryName, dict),
    dict_(dict),
    valueExpr_(),
    driver_(1, dict_)
{
    if (dict.getOrDefault("debug", false))
    {
        debug |= 1;
    }
 
    string expr;
    dict.readEntry("expression", expr);
    valueExpr_ = expressions::exprString(expr, dict);
 
    // Basic sanity
    if (valueExpr_.empty())
    {
        FatalIOErrorInFunction(dict_)
            << "The expression was not defined!" << nl
            << exit(FatalIOError);
    }
 
    driver_.readDict(dict_);
}
 
 
template<class Type>
Foam::Function1Types::Function1Expression<Type>::Function1Expression
(
    const Function1Expression<Type>& rhs
)
:
    Function1<Type>(rhs),
    dict_(rhs.dict_),
    valueExpr_(rhs.valueExpr_),
    driver_(1, rhs.driver_)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class Type>
Type Foam::Function1Types::Function1Expression<Type>::value
(
    const scalar x
) const
{
    // Expression evaluation
    driver_.clearVariables();
 
    driver_.setArgument(x);
 
    driver_.parse(this->valueExpr_);
 
    expressions::exprResult result(driver_.result());
 
    DebugInfo
        << "Evaluated: " << result << nl;
 
    if (!result.hasValue() || !result.size() || !result.isType<Type>())
    {
        FatalErrorInFunction
            << "Could not evaluate: " << this->valueExpr_
            << exit(FatalError);
    }
 
    return result.cref<Type>().first();
}
 
 
template<class Type>
Type Foam::Function1Types::Function1Expression<Type>::integrate
(
    const scalar x1,
    const scalar x2
) const
{
    NotImplemented;
    return Zero;
}
 
 
template<class Type>
void Foam::Function1Types::Function1Expression<Type>::writeData
(
    Ostream& os
) const
{
    // Function1-from-subdict so out dictionary contains
    // only the relevant entries.
    dict_.writeEntry(this->name(), os);
}
 
 
// ************************************************************************* //