SourceAst

All Known Implementing Classes:

JsAst, RecoverableJsAst
```
public interface SourceAst
```
An interface for accessing the AST root of an input.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`clearAst()`	Removes any references to root node of the AST.
`Node`	`getAstRoot(AbstractCompiler compiler)`	Gets the root node of the AST for the source file this represents.
`InputId`	`getInputId()`
`SourceFile`	`getSourceFile()`	Returns the source file the generated AST represents.

- Method Detail
  - getAstRoot
```
Node getAstRoot(AbstractCompiler compiler)
```
    Gets the root node of the AST for the source file this represents. The AST is lazily instantiated and cached. This node is always non-null, even in the case of parse errors.
  - clearAst
```
void clearAst()
```
    Removes any references to root node of the AST. If it is requested again, another parse will be performed. This method is needed to allow the ASTs to be garbage collected if the inputs are still around after compilation.
  - getInputId
```
InputId getInputId()
```
    Returns:
    
    The input id associated with this AST
  - getSourceFile
```
SourceFile getSourceFile()
```
    Returns the source file the generated AST represents.