From 1960aca2765e8d22c3110e98b1464c27853b1f1c Mon Sep 17 00:00:00 2001
From: Raul Ochoa <rochoaf@gmail.com>
Date: Tue, 3 Jan 2017 19:03:10 +0100
Subject: [PATCH] Accept expresions in polygon fill

---
 lib/carto/torque-reference.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/carto/torque-reference.js b/lib/carto/torque-reference.js
index 0b9f204..65cb946 100644
--- a/lib/carto/torque-reference.js
+++ b/lib/carto/torque-reference.js
@@ -311,7 +311,8 @@ var _mapnik_reference_latest = {
                 "type": "float",
                 "doc": "The opacity of the polygon",
                 "default-value": 1,
-                "default-meaning": "opaque"
+                "default-meaning": "opaque",
+                "expression": true
             },
             "gamma": {
                 "css": "polygon-gamma",