by Peter van der Zee, September 2010 (Please note: this project is not a usable parser, but it does produce the _complete_ parse tree for a valid ES5 script. This was my first attempt at a JS parser and I didn't really know how to get started. For my better and faster parser attemts check ZeParser, ZeParser2 and finally Tenko)
This project is not a usable parser, but it does produce the _complete_ parse tree. For my faster parsers check ZeParser and ZeParser2)
Simply enter your source in the textarea and click parse. If a certain snippet doesn't parse and you are SURE it should according to the ES5 specification, please let me know!
You can also run the test suite (takes a few seconds) or a fuzzy test (original by Jesse Ruderman, blatantly stripped by me, no longer always spits out proper js).
See blog post for more details. - Peter van der Zee
2010-09-28 Update: fixed parsing an empty script (caused by a bug). Fixing that allowed me to use the exact cfg by the spec with just one minor edit now :D Also fixed trailing whitespace/comments not being processed (they're normally ignored by a parser)
2010-12-30 Update: fixed a minor parse bug (forgot what it was :). Added simple variable inspector. Checks var declarations, shadowed vars and whether used vars are in fact declared. Sort of a work in progress. Modified code to use with my pragma pre-processor. Created own (simpler) fuzzy test suit. Made unit tests optional. Added pruning. Added simple (regex, non-parsing) syntax highlighter. Added parse tree cleanup to remove parser artifacts. Flat token tree now adds returns after each statement (want to do this for visual model as well).
2011-01-05 Update: fixed error output to no longer duplicate the string and to be html escaped. Editor is hidable. Entire settings are "exportable" in the form of a hash, which can be shared with others (settings that are missing are unchanged), also easy for my own debugging ;). Some code refactoring and cleanup. Moved highlighting css into the appropriate js files. Added an output to html option. Added small tool to do a HEREDOC kind of string-to-js-string conversion, might remove that later. Added cleaned up version of the simple highlighter.
??: fixed loop buttons for fuzzy's. Added option to break down visual parse tree model on source elements (which is probably what you want).
Planned: strict mode, variable inspector improvements, property inspector, type inferring, built in option for using a post-pragma-processed version of the script,
parse by url-argument, various code cleanups, getting rid of recursion limits.
(This is a finalized project :)