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/OpenJDK 25

Enum Class ClassFile.DeadLabelsOption

java.lang.Object
java.lang.Enum<ClassFile.DeadLabelsOption>
java.lang.classfile.ClassFile.DeadLabelsOption
All Implemented Interfaces:
Serializable, ClassFile.Option, Comparable<ClassFile.DeadLabelsOption>, Constable
Enclosing interface:
ClassFile
public static enum ClassFile.DeadLabelsOption extends Enum<ClassFile.DeadLabelsOption> implements ClassFile.Option
The option describing whether to filter unbound labels and drop their enclosing structures if possible. The default is FAIL_ON_DEAD_LABELS to fail fast with an IllegalArgumentException when a PseudoInstruction refers to an unbound label during bytecode generation.

The affected PseudoInstructions include ExceptionCatch, LocalVariable, LocalVariableType, and CharacterRange. Setting this option to DROP_DEAD_LABELS filters these pseudo-instructions from a CodeBuilder instead. Note that instructions, such as BranchInstruction, with unbound labels always fail-fast with an IllegalArgumentException.

Since:
24
See Also:

Nested Class Summary

Nested classes/interfaces declared in class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constant Description
DROP_DEAD_LABELS
Filter PseudoInstructions with unbound labels.
FAIL_ON_DEAD_LABELS
Fail fast on unbound labels.

Method Summary

Modifier and Type Method Description
static ClassFile.DeadLabelsOption valueOf(String name)
Returns the enum constant of this class with the specified name.
static ClassFile.DeadLabelsOption[] values()
Returns an array containing the constants of this enum class, in the order they are declared.

Methods declared in class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods declared in class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

FAIL_ON_DEAD_LABELS

public static final ClassFile.DeadLabelsOption FAIL_ON_DEAD_LABELS
Fail fast on unbound labels. This also ensures the accuracy of the generated class files.

DROP_DEAD_LABELS

public static final ClassFile.DeadLabelsOption DROP_DEAD_LABELS
Filter PseudoInstructions with unbound labels. Note that instructions with unbound labels still cause an IllegalArgumentException.

Method Details

values

public static ClassFile.DeadLabelsOption[] values()
Returns an array containing the constants of this enum class, in the order they are declared.
Returns:
an array containing the constants of this enum class, in the order they are declared

valueOf

public static ClassFile.DeadLabelsOption valueOf(String name)
Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
Parameters:
name - the name of the enum constant to be returned.
Returns:
the enum constant with the specified name
Throws:
IllegalArgumentException - if this enum class has no constant with the specified name
NullPointerException - if the argument is null

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/classfile/ClassFile.DeadLabelsOption.html