The handwritten parser has numerous benefits over the old bison generated one, the most basic being: * It's more than 2 times faster than the bison parser * It doesn't require complete duplication of the grammar to support strict mode (and can identify strict mode in the first place) * It fixes a number of bugs inherent in the bison parser due to the way automatic semicolon insertion was implemented.
There are a number of other benefits, but those are the most obvious. --Oliver On Nov 29, 2011, at 11:38 PM, PandaCanFly wrote: > Hello everyone, > I am researching WEBKIT and coming up against difficulty about Javascript > parser。As I Know, WEBKIT of old version uses the bison parser to interpret > javascript code. But WEBKIT of recently version doesn't uses bison parser. > Instead, WEBKIT of recently version uses Top-To-Down Recursion parser. > I have some details to add. 1) WEBKIT using bison parser has a source > file named "Grammar.cpp". 2) I know WEBKIT with 38688 version number uses > bison parser. > I hope someone can give me some explanation, thanks. > > > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
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