Target.Extension (Mixin 0.16.5-0.8.7-1 API)

java.lang.Object
- org.spongepowered.asm.mixin.injection.struct.Target.Extension

Enclosing class:

Target
```
public class Target.Extension
extends java.lang.Object
```
A stateful extension of stack or locals space for a target method which can be applied.
Stack and locals extensions are generally localised to a particular injection. This means they don't necessarily need to accumulate, it's generally sufficient to expand the method's original stack or locals size by the extension amount, with the largest extension determining the final stack size of the method.

Before this mechanism, injectors generally needed to keep track of their extension sizes via arbitrary integers, then apply them in one go. However some injector logic made the flow of these integers hard to track and lead to insidious bugs when values which should be combined were instead applied sequentially. The minor performance trade-off of using extensions to track these operations is covered by the increase in robustness.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Target.Extension`	`add()`	Add 1 to this extension
`Target.Extension`	`add(int size)`	Add the specified size to this extension
`Target.Extension`	`add(org.objectweb.asm.Type[] types)`	Add the size of the supplied type array to this extension.
`void`	`apply()`	Apply this extension to the target.
`int`	`get()`	Get the current size of this extension
`Target.Extension`	`set(int size)`	Set the size of this extension

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - add
```
public Target.Extension add()
```
    Add 1 to this extension
    
    Returns:
    
    fluent interface
  - add
```
public Target.Extension add(int size)
```
    Add the specified size to this extension
    
    Parameters:
    
    size - size to add
    
    Returns:
    
    fluent interface
  - add
```
public Target.Extension add(org.objectweb.asm.Type[] types)
```
    Add the size of the supplied type array to this extension. The size of the supplied args will first be computed, then the result will be added to the extension.
    
    Parameters:
    
    types - Types to add
    
    Returns:
    
    fluent interface
  - set
```
public Target.Extension set(int size)
```
    Set the size of this extension
    
    Parameters:
    
    size - Size to set
    
    Returns:
    
    fluent interface
  - get
```
public int get()
```
    Get the current size of this extension
    
    Returns:
    
    fluent interface
  - apply
```
public void apply()
```
    Apply this extension to the target. This reduces the current size to zero so that a new operation can begin if required.