com.google.javascript.rhino

Class TokenStream

java.lang.Object

com.google.javascript.rhino.TokenStream

public class TokenStream
extends java.lang.Object

This class implements the JavaScript scanner.

It is based on the C source files jsscan.c and jsscan.h in the jsref package.

IMPORTANT: As of 2018-03-09 it is still not possible to use Java 8 features in this file due to limitations on some internal Google projects that depend on it.

Constructor Summary

Constructors

Constructor and Description
TokenStream()

Method Summary

Modifier and Type	Method and Description
static boolean	isJSIdentifier(java.lang.String s)
static boolean	isKeyword(java.lang.String name) Is the string an ES3 keyword?

Methods inherited from class java.lang.Object

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

Constructor Detail

TokenStream

public TokenStream()

Method Detail

isKeyword

public static boolean isKeyword(java.lang.String name)

Is the string an ES3 keyword?

Keywords for versions of JavaScript after ES3 are not included, because the parser would reject valid ES3 code that happened to newer keywords if we did that.

Since isKeyword() is used repeatedly in scanning, for performance reasons, it is implemented to do the minimum number of character comparisons to ascertain whether the given name is a keyword, instead of doing string search of the name against JS keywords.

isJSIdentifier

public static boolean isJSIdentifier(java.lang.String s)