com.google.dart.compiler.backend.js
Class JsFirstExpressionVisitor

java.lang.Object
  com.google.dart.compiler.backend.js.ast.JsVisitor
      com.google.dart.compiler.backend.js.ast.RecursiveJsVisitor
          com.google.dart.compiler.backend.js.JsFirstExpressionVisitor

public class JsFirstExpressionVisitor
extends RecursiveJsVisitor

Determines if an expression statement needs to be surrounded by parentheses.

The statement or the left-most expression needs to be surrounded by parentheses if the left-most expression is an object literal or a function object. Function declarations do not need parentheses.

For example the following require parentheses:

• { key : 'value'}
• { key : 'value'}.key
• function () {return 1;}()
• function () {return 1;}.prototype

The following do not require parentheses:

• var x = { key : 'value'}
• "string" + { key : 'value'}.key
• function func() {}
• function() {}

Method Summary

static boolean	exec(JsExpressionStatement statement)
void	visitArray(JsArrayLiteral x)
void	visitArrayAccess(JsArrayAccess x)
void	visitBinaryExpression(JsBinaryOperation x)
void	visitConditional(JsConditional x)
void	visitFunction(JsFunction x)
void	visitInvocation(JsInvocation invocation)
void	visitNameRef(JsNameRef nameRef)
void	visitNew(JsNew x)
void	visitObjectLiteral(JsObjectLiteral x)
void	visitPostfixOperation(JsPostfixOperation x)
void	visitPrefixOperation(JsPrefixOperation x)

Methods inherited from class com.google.dart.compiler.backend.js.ast.RecursiveJsVisitor

visitElement

Methods inherited from class com.google.dart.compiler.backend.js.ast.JsVisitor

accept, acceptList, acceptLvalue, acceptWithInsertRemove, visit, visit, visitBlock, visitBoolean, visitBreak, visitCase, visitCatch, visitContinue, visitDebugger, visitDefault, visitDocComment, visitDouble, visitDoWhile, visitEmpty, visitExpressionStatement, visitFor, visitForIn, visitIf, visitInt, visitLabel, visitNull, visitParameter, visitProgram, visitProgramFragment, visitPropertyInitializer, visitRegExp, visitReturn, visitString, visitThis, visitThrow, visitTry, visitVars, visitWhile

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

exec

public static boolean exec(JsExpressionStatement statement)

visitArrayAccess

public void visitArrayAccess(JsArrayAccess x)

Overrides:

visitArrayAccess in class JsVisitor

visitArray

public void visitArray(JsArrayLiteral x)

Overrides:

visitArray in class JsVisitor

visitBinaryExpression

public void visitBinaryExpression(JsBinaryOperation x)

Overrides:

visitBinaryExpression in class JsVisitor

visitConditional

public void visitConditional(JsConditional x)

Overrides:

visitConditional in class JsVisitor

visitFunction

public void visitFunction(JsFunction x)

Overrides:

visitFunction in class JsVisitor

visitInvocation

public void visitInvocation(JsInvocation invocation)

Overrides:

visitInvocation in class JsVisitor

visitNameRef

public void visitNameRef(JsNameRef nameRef)

Overrides:

visitNameRef in class JsVisitor

visitNew

public void visitNew(JsNew x)

Overrides:

visitNew in class JsVisitor

visitObjectLiteral

public void visitObjectLiteral(JsObjectLiteral x)

Overrides:

visitObjectLiteral in class JsVisitor

visitPostfixOperation

public void visitPostfixOperation(JsPostfixOperation x)

Overrides:

visitPostfixOperation in class JsVisitor

visitPrefixOperation

public void visitPrefixOperation(JsPrefixOperation x)

Overrides:

visitPrefixOperation in class JsVisitor