Interface DiscontinuedInstruction.RetInstruction

All Superinterfaces:

ClassFileElementPREVIEW, CodeElementPREVIEW, DiscontinuedInstructionPREVIEW, InstructionPREVIEW

Enclosing interface:

DiscontinuedInstructionPREVIEW

public static sealed interface DiscontinuedInstruction.RetInstruction
extends DiscontinuedInstructionPREVIEW

RetInstruction is a preview API of the Java platform.

Programs can only use RetInstruction when preview features are enabled.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

Models RET and RET_W instructions discontinued from the code array of a Code attribute since class file version 51.0. Corresponding opcodes will have a kind of Opcode.Kind.DISCONTINUED_RET^PREVIEW. Delivered as a CodeElement^PREVIEW when traversing the elements of a CodeModel^PREVIEW.

Since:

22

Nested Class Summary

Nested classes/interfaces declared in interface java.lang.classfile.instruction.DiscontinuedInstruction^PREVIEW

DiscontinuedInstruction.JsrInstructionPREVIEW, DiscontinuedInstruction.RetInstructionPREVIEW

Method Summary

Modifier and Type	Method	Description
static DiscontinuedInstruction.RetInstructionPREVIEW	of(int slot)	Returns a RET instruction.
static DiscontinuedInstruction.RetInstructionPREVIEW	of(OpcodePREVIEW op, int slot)	Returns a RET or RET_W instruction.
int	slot()	Returns the local variable slot with return address.

Methods declared in interface java.lang.classfile.Instruction^PREVIEW

opcode, sizeInBytes

Method Details

slot

int slot()

Returns the local variable slot with return address.

Returns:

the local variable slot with return address

of

static DiscontinuedInstruction.RetInstructionPREVIEW of(OpcodePREVIEW op,
 int slot)

Returns a RET or RET_W instruction.

Parameters:

op - the opcode for the specific type of RET instruction, which must be of kind Opcode.Kind.DISCONTINUED_RET^PREVIEW

slot - the local variable slot to load return address from

Returns:

a RET or RET_W instruction

Throws:

IllegalArgumentException - if the opcode kind is not Opcode.Kind.DISCONTINUED_RET^PREVIEW or if slot is out of range

of

static DiscontinuedInstruction.RetInstructionPREVIEW of(int slot)

Returns a RET instruction.

Parameters:

slot - the local variable slot to load return address from

Returns:

a RET instruction

Throws:

IllegalArgumentException - if slot is out of range