Bug 33849

Summary: const decl shadowing
Product: WebKit Reporter: anton muhin <antonm>
Component: JavaScriptCoreAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: ager, barraclough, dglazkov, ggaren, oliver
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: All   
OS: All   
Attachments:
Description Flags
Small test to see how var and const declared properties are shadowed in various browsers none

anton muhin
Reported 2010-01-19 10:58:09 PST
Created attachment 46928 [details] Small test to see how var and const declared properties are shadowed in various browsers http://trac.webkit.org/changeset/47062 added a layout test to check that shadowing of const declared properties on global object is impossible. However most of other browsers behave differently---attached HTML shows that FF, Opera and Safari allow to shadow both var and const declared properties (IE8 didn't output anything)---and only Safari forbids shadowing of const properties. Semantics of shadowing/constness is not quite obvious, so it might be easily not a bug though.
Attachments
Small test to see how var and const declared properties are shadowed in various browsers (761 bytes, text/html)
2010-01-19 10:58 PST, anton muhin 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
anton muhin
Comment 1 2010-01-19 10:59:21 PST
(In reply to comment #0) > Created an attachment (id=46928) [details] > Small test to see how var and const declared properties are shadowed in various > browsers > > http://trac.webkit.org/changeset/47062 added a layout test to check that > shadowing of const declared properties on global object is impossible. However > most of other browsers behave differently---attached HTML shows that FF, Opera > and Safari allow to shadow both var and const declared properties (IE8 didn't > output anything)---and only Safari forbids shadowing of const properties. > > Semantics of shadowing/constness is not quite obvious, so it might be easily > not a bug though. Correction: FF, Opera and <Chromium> allow to shadow both var and const declared properties.
Gavin Barraclough
Comment 2 2012-03-07 00:33:04 PST
We should resolved this by implementing ES Harmony block scoped const. *** This bug has been marked as a duplicate of bug 31813 ***
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