JsStaticEval (GWT DEV 2.7.0)

```
public class JsStaticEval
extends Object
```
Removes JsFunctions that are never referenced in the program.

Nested Classes
Modifier and Type	Class and Description
`static class`	`JsStaticEval.FindBreakContinueStatementsVisitor` Examines code to find out whether it contains any break or continue statements.

Constructors
Constructor and Description
`JsStaticEval(JsProgram program)`

Methods
Modifier and Type	Method and Description
`static OptimizerStats`	`exec(JsProgram program)`
`static <T extends JsVisitable> T`	`exec(JsProgram program, T node)`
`OptimizerStats`	`execImpl()`
`<T extends JsVisitable> T`	`execImpl(T node)`
`protected static JsExpression`	`extractExpression(JsStatement stmt)` Attempts to extract a single expression from a given statement and returns it.
`protected static boolean`	`isEmpty(JsStatement stmt)`
`protected static JsFunction`	`isFunctionDecl(JsStatement stmt)` If the statement is a JsExprStmt that declares a function with no other side effects, returns that function; otherwise `null`.
`protected static JsExpression`	`shortCircuitAnd(JsBinaryOperation expr)` Simplify short circuit AND expressions.
`protected static JsExpression`	`shortCircuitOr(JsBinaryOperation expr)` Simplify short circuit OR expressions.
`protected static JsExpression`	`trySimplifyComma(JsBinaryOperation expr)`

public JsStaticEval(JsProgram program)

public static <T extends JsVisitable> T exec(JsProgram program,
                             T node)

public static OptimizerStats exec(JsProgram program)

extractExpression
```
protected static JsExpression extractExpression(JsStatement stmt)
```
Attempts to extract a single expression from a given statement and returns it. If no such expression exists, returns null.

protected static boolean isEmpty(JsStatement stmt)

isFunctionDecl
```
protected static JsFunction isFunctionDecl(JsStatement stmt)
```
If the statement is a JsExprStmt that declares a function with no other side effects, returns that function; otherwise null.

protected static JsExpression shortCircuitAnd(JsBinaryOperation expr)

Simplify short circuit AND expressions.

 if (true && isWhatever()) -> if (isWhatever()), unless side effects
 if (false() && isWhatever()) -> if (false())

protected static JsExpression shortCircuitOr(JsBinaryOperation expr)

Simplify short circuit OR expressions.

 if (true() || isWhatever()) -> if (true())
 if (false || isWhatever()) -> if (isWhatever()), unless side effects

protected static JsExpression trySimplifyComma(JsBinaryOperation expr)

public <T extends JsVisitable> T execImpl(T node)

Class JsStaticEval