In our browser we need to support scripts that use as an identifier name future reserved keywords such as interface. The scripts are rather old and perfectly legal under previous revisions of EcmaScript which does not included the list of almost every Java keyword to the future reserve.
To support this I added an option to query Context.hasFeature for FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER:
/**
* if hasFeature(RESERVED_KEYWORD_AS_IDENTIFIER) returns true,
* treat future reserved keyword (see Ecma-262, section 7.5.3) as ordinary
* identifiers but warn about this usage
*/
public static final int FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER = 3;
The corresponding code in TokenStream checks for it and issues just a warning when this feature is enabled.
I also think that it would be better not to return RESERVED as a token from TokenStream.getToken but report the specific syntax error immediately because it is very unclear from the error message:
js> x.interface = 1
js: "<stdin>", line 1: uncaught JavaScript exception: SyntaxError: missing name after . operator (<stdin>; line 1)
js: x.interface = 1
js: ..........^
what exactly went wrong. I can send a patch later for that.
Regards, Igor
I'm working on a project which uses rhino. I wanted to have finer
control over class generation and saving so I've done some patching
and clean up on the current rhino tip.
The biggest change I've made is the replacement of ClassOutput with
ClassRepository that has the single method:
public boolean storeClass(String className, byte[] classBytes,
boolean isTopLevel) throws IOException;
This interface allows any arbitary storage method, such as a
Hashtable/Map. In addition it also allows you to specify whether a
class should be loaded, via returning true or false. You can still use
ClassOutput as I've coded an internal wrapper.
With this interface it has also been possible to strip out the file
saving code from Codegen and OptClassNameHelper. The file
saving code is now an inner class FileClassRepository in Context. As
a consequence of this I've stripped out some methods from ClassNameHelper.
The resulting code is much more cleaner then before hand and everything
still works as per usual.
Other small additions are:
o Annonymous functions are now named class$1 instead of class1
o get/setClassName added to ClassNameHelper exposed in Context.
My final thoughts are, since all methods in ClassNameHelper except reset()
are now exposed whould n't it be much more "cleaner" to simply to some
how work around to eliminate reset() and provide getClassNameHelper()
via Context? You could then remove the numerous ClassNameHelper shadow
methods from Context.
Likewise, FileClassRepository could be made a public class very easily
and combined with the above result in a dozen or so less public methods in
Context.
Anyway, the changes can be found on http://www.cins.co.uk/rhino.zip
Hope it is of use to some
Kemal Bayram
I'm working on a project which uses rhino. I wanted to have finer
control over class generation and saving so I've done some patching
and clean up on the current rhino tip.
The biggest change I've made is the replacement of ClassOutput with
ClassRepository that has the single method:
public boolean storeClass(String className, byte[] classBytes,
boolean isTopLevel) throws IOException;
This interface allows any arbitary storage method, such as a
Hashtable/Map. In addition it also allows you to specify whether a
class should be loaded, via returning true or false. You can still use
ClassOutput as I've coded an internal wrapper.
With this interface it has also been possible to strip out the file
saving code from Codegen and OptClassNameHelper. The file
saving code is now an inner class FileClassRepository in Context. As
a consequence of this I've stripped out some methods from ClassNameHelper.
The resulting code is much more cleaner then before hand and everything
still works as per usual.
Other small additions are:
o Annonymous functions are now named class$1 instead of class1
o get/setClassName added to ClassNameHelper exposed in Context.
My final thoughts are, since all methods in ClassNameHelper except reset()
are now exposed whould n't it be much more "cleaner" to simply to some
how work around to eliminate reset() and provide getClassNameHelper()
via Context? You could then remove the numerous ClassNameHelper shadow
methods from Context.
Likewise, FileClassRepository could be made a public class very easily
and combined with the above result in a dozen or so less public methods in
Context.
Anyway, the changes can be found on http://www.cins.co.uk/rhino.zip
Hope it is of use to some
Kemal Bayram <rhino@cins.co.uk>
I suggest to move the code in ScriptableObject.get/put that deals with getter/setter
into separated methods so it would be easy to follow the code and the attached patch
does just that.
