com.google.gwt.dev.js

Class JsStaticEval

java.lang.Object

com.google.gwt.dev.js.JsStaticEval

public class JsStaticEval
extends Object

Removes JsFunctions that are never referenced in the program.

Nested Class Summary

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.

Constructor Summary

Constructors

Constructor and Description
JsStaticEval(JsProgram program)

Method Summary

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 void	shortCircuitAnd(JsExpression arg1, JsExpression arg2, JsContext ctx) Simplify short circuit AND expressions.
protected static void	shortCircuitOr(JsExpression arg1, JsExpression arg2, JsContext ctx) Simplify short circuit OR expressions.
protected static void	trySimplifyComma(JsExpression arg1, JsExpression arg2, JsContext ctx)

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, toString

Constructor Detail

JsStaticEval

public JsStaticEval(JsProgram program)

Method Detail

exec

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

exec

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.

isEmpty

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.

shortCircuitAnd

protected static void shortCircuitAnd(JsExpression arg1,
                                      JsExpression arg2,
                                      JsContext ctx)

Simplify short circuit AND expressions.

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

shortCircuitOr

protected static void shortCircuitOr(JsExpression arg1,
                                     JsExpression arg2,
                                     JsContext ctx)

Simplify short circuit OR expressions.

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

trySimplifyComma

protected static void trySimplifyComma(JsExpression arg1,
                                       JsExpression arg2,
                                       JsContext ctx)

execImpl

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

execImpl

public OptimizerStats execImpl()