net.sf.saxon.expr

Class NegateExpression

public class NegateExpression extends UnaryExpression

Negate Expression: implements the unary minus operator. This expression is initially created as an ArithmeticExpression (or in backwards compatibility mode, an ArithmeticExpression10) to take advantage of the type checking code. So we don't need to worry about type checking or argument conversion.

Constructor Summary
	NegateExpression(Expression base) Create a NegateExpression

Method Summary
Expression	copy() Copy an expression.
protected String	displayOperator(Configuration config)
Item	evaluateItem(XPathContext context) Evaluate the expression.
ItemType	getItemType(TypeHierarchy th) Determine the data type of the expression, if this is known statically
void	setBackwardsCompatible(boolean compatible) Set whether the expression is to be evaluated in XPath 1.0 compatibility mode
Expression	typeCheck(ExpressionVisitor visitor, ItemType contextItemType)