DeadPropertyAssignmentElimination (Closure Compiler v20200719 API)

java.lang.Object
- com.google.javascript.jscomp.DeadPropertyAssignmentElimination

All Implemented Interfaces:

CompilerPass
```
public class DeadPropertyAssignmentElimination
extends java.lang.Object
implements CompilerPass
```
An optimization pass that finds and removes dead property assignments within functions and classes.
This pass does not currently use the control-flow graph. It makes the following assumptions:
- Functions with inner functions are not processed.
- All properties are read whenever entering a block node. Dead assignments within a block are processed.
- Hook nodes are not processed (it's assumed they read everything)
- Switch blocks are not processed (it's assumed they read everything)
- Any reference to a property getter/setter is treated like a call that escapes all props.
- If there's an Object.definePropert{y,ies} call where the object or property name is aliased then the optimization does not run at all.
- Properties names defined in externs will not be pruned.

- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void process(Node externs, Node root)
  Process the JS with root node root.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - process
```
public void process(Node externs,
                    Node root)
```
    Description copied from interface: CompilerPass
    
    Process the JS with root node root. Can modify the contents of each Node tree
    
    Specified by:
    
    process in interface CompilerPass
    
    Parameters:
    
    externs - Top of external JS tree
    
    root - Top of JS tree