Sync with language-javascript

[50Wliu]

This is a pretty large overhaul of language-coffee-script that aims to bring it up-to-date with language-javascript. Things I've ported over include:

• Functions
• Function calls
• Method calls
• Objects
• Properties
• Numbers
• Operators
• Begin/end for braces

Before	After

Fixes #18 (they should both actually be variable assignments and not functions)
Fixes #25
Fixes #45
Fixes #63
Fixes #79
Fixes #88
Fixes #90
Fixes #97
Fixes #111
Closes #53

TODO:

• Instance variables aren't being tokenized correctly in parameters (see the fixme in the code).
• Argument matching terminates at the end of the line instead of attempting to continue in the case of inline functions - Unfixable using regex
• Similar to above, argument matching does not continue for multiline arguments, even if they're surrounded by parentheses - Unfixable using regex
• Quoted functions are not recognized ("test": ->)
• Objects turn into properties if you add an existence check (a.b?.c)
• Properties don't turn into method calls if you add a standalone @ (console.log @)

/cc @atom/feedback - if some of you could try using this branch for everyday coding, that would be great in order to spot any regressions.
/cc @esdoppio @MaximSokolov @pchaigno

[50Wliu]

Remaining problems:

• Instance variables aren't being tokenized correctly in parameters (see the fixme in the code).
• Argument matching terminates at the end of the line instead of attempting to continue in the case of inline functions
• Similar to above, argument matching does not continue for multiline arguments, even if they're surrounded by parentheses
• Quoted functions are not recognized ("test": ->)

(this post will be continually edited)
moved to the main pull request description

[50Wliu]

Other than the "messed up" line in #53, everything else is now tagged. After this is merged I'll open a new issue for that.
Fixed in the commits below!

[pchaigno]

It's pretty great overall!
I found a couple constructs that seem broken by this:

1. Example before (master) in Lightshow
2. Example with this pull request

Notice a few keywords are not highlighted near the end.

[50Wliu]

Thanks - fixed!
Lightshow

[MaximSokolov]

It probably should be

{
  'match': '([a-zA-Z_$][\\w$]*)(\\.\\.\\.)?'
  'captures':
    '1':
      'name': 'variable.parameter.function.coffee'
    '2':
      'name': 'keyword.operator.splat.coffee'
}
{
  'match': '(@(?:[a-zA-Z_$][\\w$]*)?)(\\.\\.\\.)?'
  'captures':
    '1':
      'name': 'variable.parameter.function.readwrite.instance.coffee'
    '2':
      'name': 'keyword.operator.splat.coffee'
}
{
  'include': '$self'
}

[MaximSokolov]

Note that =, : operators now scoped differently

test = () -> x * x # keyword.operator.assignment
a = 1 + 1 # just keyword.operator

Seti syntax

[50Wliu]

Bah. Looks like I'll have to update those as well.

Edit: Scratch that, just going to change these scopes back to keyword.operator.

[MaximSokolov]

It also closes #64

[50Wliu]

To be clear, this suffers from the same problems in #64 as language-javascript also can't tokenize those functions.

[50Wliu]

Thanks @MaximSokolov - your fix did work!

[lee-dohm]

I've been running this for a couple days and things look good to me 👍

[50Wliu]

console.log not hasScope(beforePrefixScopesArray, "entity.name.tag.css") and prefix.trim() is ":"

^ reminder for me to fix that

Edit: Fixed! deff726

[50Wliu]

stack is incorrectly tokenized as a function:

for currentStack in stack by -1

Edit: fixed in 55dec99

No support for ..:

index = parseInt(match[1..])

Edit: I won't be adding support for splices to this PR.

[50Wliu]

error = new Error("Deprecated function(s) #{deprecations.map(({originName}) -> originName).join ', '}) were called.")

string termination breaks somewhere in there.

Edit: Fixed in 43d6b9d

[Ben3eeE]

🎉