RelativeStep

java.lang.Object
- gnu.mapping.PropertySet
- - gnu.mapping.Procedure
  - - gnu.mapping.ProcedureN
    - - gnu.mapping.MethodProc
      - gnu.xquery.util.RelativeStep

All Implemented Interfaces:

Inlineable, Named
```
public class RelativeStep
extends MethodProc
implements Inlineable
```
Implements XPath path expression. The XPath expression E1/E2 is compiled into: (relative-step E1 (lambda (dot position last) E2)).

Field Summary

Fields
Modifier and Type Field Description

static RelativeStep relativeStep
- Fields inherited from class gnu.mapping.MethodProc
  applyToConsumerDefaultMP, argTypes, NO_MATCH, NO_MATCH_AMBIGUOUS, NO_MATCH_BAD_TYPE, NO_MATCH_GUARD_FALSE, NO_MATCH_TOO_FEW_ARGS, NO_MATCH_TOO_MANY_ARGS, NO_MATCH_UNUSED_KEYWORD, THROW_ON_EXCEPTION
- Fields inherited from class gnu.mapping.ProcedureN
  applyToObject, noArgs
- Fields inherited from class gnu.mapping.Procedure
  applyMethodType, applyToConsumerDefault, applyToConsumerMethod, applyToObjectDefault, applyToObjectMethod, compilerKey, compilerXKey, inlineIfConstantSymbol, validateApplyKey, validateXApplyKey
- Fields inherited from class gnu.mapping.PropertySet
  nameKey

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static Object`	`applyToConsumer(Procedure proc, CallContext ctx)`
`void`	`compile(ApplyExp exp, Compilation comp, Target target)`
`static TreeScanner`	`extractStep(Expression exp)`
`Type`	`getReturnType(Expression[] args)`	Semi-deprecated - instead should be set at Inline time.
`int`	`numArgs()`	Return `minArgs()\|(maxArgs<<12)`.

Methods inherited from class gnu.mapping.MethodProc
applyToConsumerDefaultMP, getParameterType, isApplicable, matchFailAsException, mostSpecific, numParameters, overrideEquivalent, resolveParameterTypes

Methods inherited from class gnu.mapping.ProcedureN
applyToObject

Methods inherited from class gnu.mapping.Procedure
apply0, apply1, apply2, apply3, apply4, applyL, applyN, applyToConsumerDefault, applyToObjectDefault, checkArgCount, checkBadCode, getApplyMethod, getApplyToConsumerMethod, getApplyToObjectMethod, getSetter, getSourceLocation, isSideEffectFree, lookupApplyHandle, maxArgs, maxArgs, minArgs, minArgs, set0, set1, setN, setSetter, setSourceLocation, toString

Methods inherited from class gnu.mapping.PropertySet
getName, getProperty, getSymbol, removeProperty, setName, setProperty, setProperty, setSymbol

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - relativeStep
```
public static final RelativeStep relativeStep
```
- Method Detail
  - numArgs
```
public int numArgs()
```
    Description copied from class: Procedure
    
    Return minArgs()|(maxArgs<<12). We use a single virtual function to reduce the number of methods in the system, as well as the number of virtual method table entries. We shift by 12 so the number can normally be represented using a sipush instruction, without requiring a constant pool entry.
    
    Overrides:
    
    numArgs in class Procedure
  - applyToConsumer
```
public static Object applyToConsumer(Procedure proc,
                                     CallContext ctx)
                              throws Throwable
```
    Throws:
    
    Throwable
  - compile
```
public void compile(ApplyExp exp,
                    Compilation comp,
                    Target target)
```
    Specified by:
    
    compile in interface Inlineable
  - getReturnType
```
public Type getReturnType(Expression[] args)
```
    Description copied from class: Procedure
    
    Semi-deprecated - instead should be set at Inline time. FIXME
    
    Overrides:
    
    getReturnType in class Procedure
  - extractStep
```
public static TreeScanner extractStep(Expression exp)
```