Package scala.tools.asm

Class Label

java.lang.Object

scala.tools.asm.Label

public class Label
extends java.lang.Object

A position in the bytecode of a method. Labels are used for jump, goto, and switch instructions, and for try catch blocks. A label designates the instruction that is just after. Note however that there can be other elements between a label and the instruction it designates (such as other labels, stack map frames, line numbers, etc.).

Field Summary

Fields

Modifier and Type	Field	Description
int	flags	The type and status of this label or its corresponding basic block.
java.lang.Object	info	A user managed state associated with this label.

Constructor Summary

Constructors

Constructor	Description
Label()	Constructs a new label.

Method Summary

Modifier and Type	Method	Description
int	getOffset()	Returns the bytecode offset corresponding to this label.
java.lang.String	toString()	Returns a string representation of this label.

Methods inherited from class java.lang.Object

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

Field Detail

info

public java.lang.Object info

A user managed state associated with this label. Warning: this field is used by the ASM tree package. In order to use it with the ASM tree package you must override the getLabelNode method in MethodNode.

flags

public int flags

The type and status of this label or its corresponding basic block. Must be zero or more of FLAG_DEBUG_ONLY, FLAG_JUMP_TARGET, FLAG_RESOLVED, FLAG_REACHABLE, FLAG_SUBROUTINE_CALLER, FLAG_SUBROUTINE_START, FLAG_SUBROUTINE_END.

Constructor Detail

Label

public Label()

Constructs a new label.

Method Detail

getOffset

public int getOffset()

Returns the bytecode offset corresponding to this label. This offset is computed from the start of the method's bytecode. This method is intended for Attribute sub classes, and is normally not needed by class generators or adapters.

Returns:

the bytecode offset corresponding to this label.

Throws:

java.lang.IllegalStateException - if this label is not resolved yet.

toString

public java.lang.String toString()

Returns a string representation of this label.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of this label.