16#ifndef QGSOPTIONALEXPRESSION_H
17#define QGSOPTIONALEXPRESSION_H
67 void writeXml( QDomElement &element )
const;
73 void readXml(
const QDomElement &element );
Class for parsing and evaluation of expressions (formerly called "search strings").
An expression with an additional enabled flag.
QgsOptionalExpression()=default
Construct a default optional expression.
QgsOptional is a container for other classes and adds an additional enabled/disabled flag.