ReferenceCollector

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

All Implemented Interfaces:

CompilerPass, StaticSymbolTable<Var,Reference>
```
public final class ReferenceCollector
extends java.lang.Object
implements CompilerPass, StaticSymbolTable<Var,Reference>
```
A helper class for passes that want to access all information about where a variable is referenced and declared at once and then make a decision as to how it should be handled, possibly inlining, reordering, or generating warnings. Callers do this by providing ReferenceCollector.Behavior and then calling process(Node, Node).

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static interface`	`ReferenceCollector.Behavior`	Way for callers to add specific behavior during traversal that utilizes the built-up reference information.

Constructor Summary

Constructors
Constructor	Description
`ReferenceCollector(AbstractCompiler compiler, ReferenceCollector.Behavior behavior, com.google.javascript.jscomp.ScopeCreator creator)`	Constructor initializes block stack.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Iterable<Var>`	`getAllSymbols()`	Gets the variables that were referenced in this callback.
`ReferenceCollection`	`getReferences(Var v)`	Gets the reference collection for the given variable.
`Scope`	`getScope(Var var)`	Returns the scope for a given symbol.
`void`	`process(Node root)`
`void`	`process(Node externs, Node root)`	Convenience method for running this pass over a tree with this class as a callback.

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

- Constructor Detail
  - ReferenceCollector
```
public ReferenceCollector(AbstractCompiler compiler,
                          ReferenceCollector.Behavior behavior,
                          com.google.javascript.jscomp.ScopeCreator creator)
```
    Constructor initializes block stack.
- Method Detail
  - process
```
public void process(Node externs,
                    Node root)
```
    Convenience method for running this pass over a tree with this class as a callback.
    
    Specified by:
    
    process in interface CompilerPass
    
    Parameters:
    
    externs - Top of external JS tree
    
    root - Top of JS tree
  - process
```
public void process(Node root)
```
  - getAllSymbols
```
public java.lang.Iterable<Var> getAllSymbols()
```
    Gets the variables that were referenced in this callback.
    
    Specified by:
    
    getAllSymbols in interface StaticSymbolTable<Var,Reference>
  - getScope
```
public Scope getScope(Var var)
```
    Description copied from interface: StaticSymbolTable
    
    Returns the scope for a given symbol.
    
    Specified by:
    
    getScope in interface StaticSymbolTable<Var,Reference>
  - getReferences
```
public ReferenceCollection getReferences(Var v)
```
    Gets the reference collection for the given variable.
    
    Specified by:
    
    getReferences in interface StaticSymbolTable<Var,Reference>