Replace `shared_ptr` with &reference

2 files changed, 2 insertions, 2 deletions

diff --git a/include/mbgl/style/filter.hpp b/include/mbgl/style/filter.hpp
index a5bd32b71e..99a5426c2b 100644
--- a/include/mbgl/style/filter.hpp
+++ b/include/mbgl/style/filter.hpp
@@ -236,7 +236,7 @@ public:
     
 class ExpressionFilter {
 public:
-    std::shared_ptr<expression::Expression> expression;
+    expression::Expression &expression;
     
     friend bool operator==(const ExpressionFilter& lhs, const ExpressionFilter& rhs) {
         return lhs.expression == rhs.expression;
diff --git a/src/mbgl/style/filter_evaluator.cpp b/src/mbgl/style/filter_evaluator.cpp
index 72022172f4..39f356a8b1 100644
--- a/src/mbgl/style/filter_evaluator.cpp
+++ b/src/mbgl/style/filter_evaluator.cpp
@@ -213,7 +213,7 @@ bool FilterEvaluator::operator()(const NotHasIdentifierFilter&) const {
 }
 
 bool FilterEvaluator::operator()(const ExpressionFilter& filter) const {
-    const expression::EvaluationResult result = filter.expression->evaluate(context);
+    const expression::EvaluationResult result = filter.expression.evaluate(context);
     if (result) {
         const optional<bool> typed = expression::fromExpressionValue<bool>(*result);
         return typed ? *typed : false;