Accessing variables/functions from initializer in predicates doesn't work

[tamagottschi]

This is my initializer in the .pegcoffee file

{
  @knownNamespaces = []

  @isKnownNamespace = (ns) ->
    for x in namespaces
      if ns in x
        return true
    return false
}

When I try to use the definitions

Element
    = tagInfos:StartTag
        & {
            @knownNamespaces.push(tagInfos.namespaces)
            prefix = tagInfos.qid.prefix
            if (@isKnownNamespace(prefix) == false)
                error("unknown namespace prefix '" + prefix + "'")
            true
        }
        ElementContent*
        & {
            @knownNamespaces.pop()
        }
        qid:EndTag
        { if ( tagInfos.qid.full != qid.full ) then expected "that start and end tag must be identical" }

In the final action I can access, e.g. @knownNamespaces, but not in the predicates!?!

Any help?

thanks,

Jan

[dignifiedquire]

I've added some tests for using this and it works fine there. e402c1c
My guess is that something else in your parsing does not happen the way you would expect it.

[tamagottschi]

Hi,

thanks for your answer. But the problem is not the code inside of an action. I have problems with code inside predicates!!

Am 11.02.2014 um 17:48 schrieb Friedel Ziegelmayer notifications@github.com:

I've added some tests for using this and it works fine there. e402c1c
My guess is that something else in your parsing does not happen the way you would expect it

I included my (small) source code in the zipfile with the working javascript version for pegjs (as published on github) and my try with coffeescript. The following happens, if I try both versions:

xmlChecker> cd src;./pegjs.sh
x/src> cd ../test/;coffee test.coffee
x/test> cd ../src;./pegcoffee.sh
x/src> cd ../test/;coffee test.coffee

/Users/goa/Implementierungen/xmlChecker/lib/xmlCheckerModule.js:148
@knownNamespaces.push(tagInfos.namespaces)
^
SyntaxError: Unexpected token ILLEGAL
at Module._compile (module.js:439:25)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (/usr/local/lib/node_modules/coffee-script/lib/coffee-script/coffee-script.js:211:36)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (/Users/goa/Implementierungen/xmlChecker/test/test.coffee:1:1, :4:16)
at Object. (/Users/goa/Implementierungen/xmlChecker/test/test.coffee:1:1, :8:4)
at Module._compile (module.js:456:26)

Further I tried to include a function (see commented code above the initializer) in the initializer code, which gives an error, too. In pegjs this is allowed. I hope the full example will help you to localize the problem(s) easier.

As I love coffeescript I hope you find a solution.

Thanks for your help,

Jan

[dignifiedquire]

@tamagottschi I'm afraid the zip file got lost when you sent the email to github. Try sending it to my private email you can find it in my github profile