see below On Feb 8, 2011, at 2:01 PM, Mark S. Miller wrote: > Does anyone know of any other syntax that all major JS engines accept that > are not in the official ES5.1 grammar?
Yes, various RegExp syntax discrepancies are know to exist. Somebody needs to catalog them. > > Does anyone know of any places on the web attempting to accumulate such > exceptions? None that I know of that I would unconditionally trust. > > The other one I know of is nested named function declarations > <http://wiki.ecmascript.org/doku.php?id=conventions:no_non_standard_strict_decls>. > And there was an ASI mis-description for "break" and "continue" that was > corrected between ES5 and ES5.1. There really isn't any useful common semantics for function declaration in blocks. See https://blogs.msdn.com/b/ie/archive/2010/08/25/chakra-interoperability-means-more-than-just-standards.aspx > > We really need a complete codification of the consensus ES5.1 grammar. > Starting from the official grammar, the Caja > <http://caja.appspot.com/trycaja/index.html?input=do%20{%3b}%20while%28false%29%20false> > and ES-Lab <http://es-lab.googlecode.com/svn/trunk/site/esparser/index.html> > parsers both reject "do {;} while (false) false;" because we didn't know any > better. I expect there are many other independent parsers (minimizers, > linters, etc) that make the same mistake. > > Even if such "corrections" do not make it into future errata, I would like to > see them recorded on the ecmascript wiki. I was going to suggest that the place to start is bugs.ecmascript.org, but you beat me to it. Allen
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