Package org.codehaus.groovy.transform.tailrec

Class InWhileLoopWrapper

java.lang.Object

org.codehaus.groovy.transform.tailrec.InWhileLoopWrapper

public class InWhileLoopWrapper
extends Object

Wrap the body of a method in a while loop, nested in a try-catch. This is the first step in making a tail recursive method iterative.

There are two ways to invoke the next iteration step:

1. "continue _RECUR_HERE_" is used by recursive calls outside of closures
2. "throw LOOP_EXCEPTION" is used by recursive calls within closures b/c you cannot invoke "continue" from there

Field Summary

Fields

Modifier and Type	Field	Description
static final GotoRecurHereException	LOOP_EXCEPTION	Exception instance thrown from closures to restart the generated loop.
static final String	LOOP_LABEL	Label targeted by synthesized continue statements.

Constructor Summary

Constructors

Constructor	Description
InWhileLoopWrapper()

Method Summary

Modifier and Type	Method	Description
void	wrap(MethodNode method)	Wraps the supplied method body in the loop structure used by the tail-recursion transform.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LOOP_LABEL

public static final String LOOP_LABEL

Label targeted by synthesized continue statements.

See Also:

• Constant Field Values

LOOP_EXCEPTION

public static final GotoRecurHereException LOOP_EXCEPTION

Exception instance thrown from closures to restart the generated loop.

Constructor Details

InWhileLoopWrapper

public InWhileLoopWrapper()

Method Details

wrap

public void wrap(MethodNode method)

Wraps the supplied method body in the loop structure used by the tail-recursion transform.

Parameters:

method - the method to rewrite