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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2018-2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::functionEntries::ifeqEntry
Description
Conditional parsing of and within dictionary entries.
E.g.
\verbatim
a #calc "0.123";
b 1.23e-1;
#ifeq ($a $b)
..
#else
..
#endif
c #ifeq ($a $b) 5.53 #else 7.89 #endif;
\endverbatim
\verbatim
ddtSchemes
{
#ifeq (${FOAM_APPLICATION} foamRun)
default steadyState;
#else
default Euler;
#endif
}
\endverbatim
Note:
- supports dictionary variables and environment variables
- the two arguments should be tokens
- the equality test supports any word/string/variable, integers
and floating point numbers
- parsing of (non)matching \c \#else, \c \#endif is not very sophisticated
See also
Foam::functionEntries::ifEntry
SourceFiles
ifeqEntry.C
\*---------------------------------------------------------------------------*/
#ifndef ifeqEntry_H
#define ifeqEntry_H
#include "functionEntry.H"
#include "DynamicList.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace functionEntries
{
/*---------------------------------------------------------------------------*\
Class ifeqEntry Declaration
\*---------------------------------------------------------------------------*/
class ifeqEntry
:
public functionEntry
{
protected:
typedef Tuple2<fileName, label> filePos;
private:
// Private Member Functions
static tokenList readArgList(Istream& is);
//- Read tokens. Skip dummy tokens
void readToken(token& t, Istream& is) const;
//- Expand token if it is a variable
token expand(const dictionary& dict, const token& t) const;
bool equalToken(const token& t1, const token& t2) const;
//- Consume tokens until reached a specific word
void skipUntil
(
DynamicList<filePos>& stack,
const dictionary& contextDict,
const functionName& endWord,
Istream& is
) const;
template<class Context>
bool evaluate
(
const bool doIf,
DynamicList<filePos>& stack,
const dictionary& contextDict,
Context& context,
Istream& is
) const;
//- Main driver: depending on 'equal' starts evaluating or
// skips forward to #else
template<class Context>
bool execute
(
DynamicList<filePos>& stack,
const dictionary& contextDict,
Context& context,
Istream& is
) const;
protected:
// Protected Member Functions
//- Main driver: depending on 'equal' starts evaluating or
// skips forward to #else
template<class Context>
bool execute
(
const bool equal,
DynamicList<filePos>& stack,
const dictionary& contextDict,
Context& context,
Istream& is
) const;
public:
//- Runtime type information
FunctionTypeName("#ifeq");
// Constructors
//- Construct from function type, dictionary and tokenList
ifeqEntry
(
const functionName& functionType,
const label lineNumber,
const dictionary& parentDict,
const Istream& is,
const tokenList& tokens
);
//- Construct from line number, dictionary and Istream
ifeqEntry
(
const label lineNumber,
const dictionary& parentDict,
Istream& is
);
//- Copy construct
ifeqEntry(const ifeqEntry&) = default;
//- Clone
virtual autoPtr<entry> clone(const dictionary&) const
{
return autoPtr<entry>(new ifeqEntry(*this));
}
// Member Functions
//- Expand the functionEntry into the contextDict
virtual bool execute(dictionary& contextDict, Istream& is);
//- Expand the functionEntry into the contextEntry
static bool execute
(
const dictionary& contextDict,
primitiveEntry& contextEntry,
Istream&
);
// Member Operators
//- Disallow default bitwise assignment
void operator=(const ifeqEntry&) = delete;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace functionEntries
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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