gnu.bytecode

Class ExitableBlock

java.lang.Object

gnu.bytecode.ExitableBlock

public class ExitableBlock
extends java.lang.Object

Support for code block that one may be exited. You may optionally exit with a value, and/or run intervening finally blocks.

Typical usage::

 CodeAttr code = ...;
 Type retType = ...; // a Type or null
 ExitableBlock block = code.startExitableBlock(retType, true);
 ...
 ... block.exit() ...; // conditionally
 ...
 code.endExitableBlock();
 

The block.exit() compiles to a transfer to the end of the block, executing any finally-blocks within the block that surround the call to exit.

If the ExitableBlock should leave a result on the stack, then specify the type of the result as the retType. The block itself must push a result before calling endExitableBlock (unless code.reachableHere() is false), and must also push a result before block.exit()..

Method Summary

Modifier and Type	Method and Description
void	exit() Exit this surrounding block, executing finally blocks as needed.
Label	exitIsGoto() If an exit is simple, return the label for block end.

Methods inherited from class java.lang.Object

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

Method Detail

exit

public void exit()

Exit this surrounding block, executing finally blocks as needed. Return a value as the result of this ExitableBlock.

exitIsGoto

public Label exitIsGoto()

If an exit is simple, return the label for block end. The exit is simple if there is no intervening finally blocks.