Jison 0.2.2 Error with lstack.

[jashkenas]

Hi Zach.

Upgrading from Jison 0.2.0 to 0.2.2 and rebuilding the CoffeeScript compiler causes the generated parser to fail. Looking at the diff, it appears that an lstack array was introduced, into which is pushed two different types of objects: the yyloc location, and the yyval._$ object, which have different properties. The first time the _$ is created, it assumes the existence of a previous object in the stack, causing things to break like so:

TypeError: In Cakefile, Cannot read property 'first_line' of undefined
    at Object.parse (/Users/jashkenas/Desktop/Projects/coffee-script/lib/parser.js:621:63)
    at /Users/jashkenas/Desktop/Projects/coffee-script/lib/coffee-script.js:26:22
    at Object.run (/Users/jashkenas/Desktop/Projects/coffee-script/lib/coffee-script.js:55:28)
    at /Users/jashkenas/Desktop/Projects/coffee-script/lib/cake.js:41:20
    at path.js:271:19

Here's the diff of the generated parser.js:

https://gist.github.com/878709

Hope that helps.

[zaach]

Ah, thanks. There was a new location object added to the lexer, but I need to ignore it if a custom lexer does not have it.

[zaach]

This should be fixed now.

[jashkenas]

Works great -- thanks for the release.