/************************************************************************
 * This file has been generated automatically from                      *
 *                                                                      *
 * src/core/qgsexpressionfieldbuffer.h                                  *
 *                                                                      *
 * Do not edit manually ! Edit header and run scripts/sipify.py again   *
 ************************************************************************/





class QgsExpressionFieldBuffer
{
%Docstring(signature="appended")
Buffers information about expression fields for a vector layer.
%End

%TypeHeaderCode
#include "qgsexpressionfieldbuffer.h"
%End
  public:
    struct ExpressionField
    {
      ExpressionField( const QString &exp, const QgsField &fld );

      QgsExpression cachedExpression;
      QgsField field;
    };

    QgsExpressionFieldBuffer();

    void addExpression( const QString &exp, const QgsField &fld );
%Docstring
Add an expression to the buffer

:param exp: expression to add
:param fld: field to add
%End

    void removeExpression( int index );
%Docstring
Remove an expression from the buffer

:param index: index of expression to remove
%End

    void renameExpression( int index, const QString &name );
%Docstring
Renames an expression field at a given index

:param index: The index of the expression to change
:param name: New name for field
%End

    void updateExpression( int index, const QString &exp );
%Docstring
Changes the expression at a given index

:param index: The index of the expression to change
:param exp: The new expression to set
%End

    void writeXml( QDomNode &layer_node, QDomDocument &document ) const;
%Docstring
Saves expressions to xml under the layer node
%End

    void readXml( const QDomNode &layer_node );
%Docstring
Reads expressions from project file
%End

    void updateFields( QgsFields &flds ) const;
%Docstring
Adds fields with the expressions buffered in this object to a :py:class:`QgsFields` object

:param flds: The fields to be updated
%End

    QList<QgsExpressionFieldBuffer::ExpressionField> expressions() const;

};

/************************************************************************
 * This file has been generated automatically from                      *
 *                                                                      *
 * src/core/qgsexpressionfieldbuffer.h                                  *
 *                                                                      *
 * Do not edit manually ! Edit header and run scripts/sipify.py again   *
 ************************************************************************/