Support tokens in number properties

[edenh]

Would allow for vector tile data in style properties, like:

{
   "icon-size": "{venue_rating}"
}

cc @ansis @mourner

[nickidlugash]

👍 for this, together with arithmetic operators: #47

[robschley]

Has there been any movement on this feature? What would it take to get it added to the spec? Can I help in any way?

[jfirebaugh]

@robschley No movement, though it's relatively high on the priority list. The spec change is straightforward; the main lift would be implementing it in mapbox-gl-js and mapbox-gl-native.

[jfirebaugh]

⇢ #249