A set of expression-related functions. More...

Static Public Member Functions
static std::tuple< QVariant::Type, int >	determineResultType (const QString &expression, const QgsVectorLayer layer, QgsFeatureRequest request=QgsFeatureRequest(), QgsExpressionContext context=QgsExpressionContext(), bool foundFeatures=nullptr)
	Returns a value type and user type for a given expression.

Detailed Description

A set of expression-related functions.

Definition at line 51 of file qgsexpressionutils.h.

Member Function Documentation

std::tuple< QVariant::Type, int > QgsExpressionUtils::determineResultType	(	const QString &	expression,
		const QgsVectorLayer *	layer,
		QgsFeatureRequest	request = `QgsFeatureRequest()`,
		QgsExpressionContext	context = `QgsExpressionContext()`,
		bool *	foundFeatures = `nullptr`
	)

static

Returns a value type and user type for a given expression.

Parameters

expression	An expression string.
layer	A vector layer from which the expression will be executed against.
request	A feature request object.
context	An expression context object.
foundFeatures	An optional boolean parameter that will be set when features are found.

Definition at line 339 of file qgsexpressionutils.cpp.

The documentation for this class was generated from the following files: