QGIS API Documentation  3.21.0-Master (5b68dc587e)
Classes | Macros
qgsexpressionutils.h File Reference
#include "qgsfeature.h"
#include "qgsexpression.h"
#include "qgscolorramp.h"
#include "qgsvectorlayerfeatureiterator.h"
#include "qgsrasterlayer.h"
#include "qgsproject.h"
#include "qgsrelationmanager.h"
#include "qgsvectorlayer.h"
#include "qgsmeshlayer.h"
#include <QThread>
#include <QLocale>
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class  QgsExpressionUtils
 A set of expression-related functions. More...


#define ENSURE_NO_EVAL_ERROR   { if ( parent->hasEvalError() ) return QVariant(); }
#define FEAT_FROM_CONTEXT(c, f)
#define SET_EVAL_ERROR(x)   { parent->setEvalErrorString( x ); return QVariant(); }
#define SIP_NO_FILE

Macro Definition Documentation


#define ENSURE_NO_EVAL_ERROR   { if ( parent->hasEvalError() ) return QVariant(); }

Definition at line 35 of file qgsexpressionutils.h.


#define FEAT_FROM_CONTEXT (   c,
if ( !(c) || !( c )->hasFeature() ) return QVariant(); \
QgsFeature f = ( c )->feature();
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c

Definition at line 38 of file qgsexpressionutils.h.


#define SET_EVAL_ERROR (   x)    { parent->setEvalErrorString( x ); return QVariant(); }

Definition at line 36 of file qgsexpressionutils.h.


#define SIP_NO_FILE

Definition at line 20 of file qgsexpressionutils.h.