From 76ed5079a547e9f98616a9401c8814d224cec9d8 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Fri, 5 Jan 2018 12:40:54 -0800
Subject: [core, ios, macos, android] Add data-driven-styling support for
 `text-font`

---
 include/mbgl/style/expression/coercion.hpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'include/mbgl/style/expression/coercion.hpp')

diff --git a/include/mbgl/style/expression/coercion.hpp b/include/mbgl/style/expression/coercion.hpp
index 665bb7ce7c..40d2490186 100644
--- a/include/mbgl/style/expression/coercion.hpp
+++ b/include/mbgl/style/expression/coercion.hpp
@@ -1,6 +1,8 @@
 #pragma once
+
 #include <mbgl/style/expression/expression.hpp>
 #include <mbgl/style/conversion.hpp>
+
 #include <memory>
 #include <vector>
 
@@ -23,6 +25,9 @@ public:
     void eachChild(const std::function<void(const Expression&)>& visit) const override;
 
     bool operator==(const Expression& e) const override;
+
+    std::vector<optional<Value>> possibleOutputs() const override;
+
 private:
     EvaluationResult (*coerceSingleValue) (const Value& v);
     std::vector<std::unique_ptr<Expression>> inputs;
-- 
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