Filter not recognized when filtered expression contains a '/' with ()

[tals]

Vue.js version

2.1.10

Reproduction Link

A variation on #4415
https://jsbin.com/heguyujupu/edit?html,console,output

Steps to reproduce

{{ (price) / 100 | currency }}

What is Expected?

This divided number gets filtered

What is actually happening?

Get this error:

[Vue warn]: Property or method \"currency\" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option. 
(found in root instance)"

[rixlabs]

The parser think is a regex due to this check

(!p || !/[\w$]/.test(p))
line 58 of filter-parser.js

If you test it with the close parenthesis ')' it gives true.

I can add another 'if' and open a PR. If anyone see a better way just let me know

[tals]

Thanks for the quick response!

Seems like data[0] / 1 and 1. / 2 will blow up for the same reason. Might be worth rolling that into your PR.

[rixlabs]

you're right I have to check all the parenthesis and the point. Is not the case for comma if I'm not wrong

[rixlabs]

Added dot and square brackets verification