TXPathNegationNode

Represents an XPath Negation expression.

Declaration

Source position: laz2_xpath.pas line 130

`type TXPathNegationNode = class(TXPathExprNode)`
`public`
`constructor Create();`		Constructor for the class instance.
`destructor Destroy; override;`		Destructor for the class instance.
`function Evaluate(); override;`		Evaluates the XPath expression.
`end;`

`TXPathNegationNode`		Represents an XPath Negation expression.
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`TXPathExprNode`		Defines the base class used to evaluate XPath expressions.
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`TObject`

TXPathNegationNode is a TXPathExprNode descendant used to represent a Unary Expression with a Negation literal in the XPath syntax. For example:

-$varname

TXPathNegationNode provides an overridden Evaluate method used to derive the return value for the expression.