net.sf.saxon.instruct
public class While extends Instruction
Constructor Summary | |
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While(Expression test, Expression action) |
Method Summary | |
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boolean | createsNewNodes()
Determine whether this instruction creates new nodes.
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void | display(int level, NamePool pool, PrintStream out)
Diagnostic print of expression structure. |
Expression | getActionExpression()
Get the action expression (the content of the for-each) |
int | getInstructionNameCode()
Get the name of this instruction for diagnostic and tracing purposes |
ItemType | getItemType(TypeHierarchy th)
Get the item type of the items returned by evaluating this instruction
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Iterator | iterateSubExpressions()
Get all the XPath expressions associated with this instruction
(in XSLT terms, the expression present on attributes of the instruction,
as distinct from the child instructions in a sequence construction) |
Expression | optimize(Optimizer opt, StaticContext env, ItemType contextItemType) |
TailCall | processLeavingTail(XPathContext context) |
protected void | promoteInst(PromotionOffer offer)
Handle promotion offers, that is, non-local tree rewrites. |
Expression | simplify(StaticContext env)
Simplify an expression. |
Expression | typeCheck(StaticContext env, ItemType contextItemType) |
Parameters: level indentation level for this expression out
Returns: the string "saxon:while"
Parameters: th
Returns: the static item type of the instruction
Parameters: offer The type of rewrite being offered
Throws: XPathException
Returns: the simplified expression
Throws: XPathException if an error is discovered during expression rewriting