[core] Replace expressions RTTI with enums + static cast

1 files changed, 4 insertions, 3 deletions

diff --git a/include/mbgl/style/expression/literal.hpp b/include/mbgl/style/expression/literal.hpp
index 44c095bf28..bcae23b1fa 100644
--- a/include/mbgl/style/expression/literal.hpp
+++ b/include/mbgl/style/expression/literal.hpp
@@ -13,12 +13,12 @@ namespace expression {
 class Literal : public Expression {
 public:
     Literal(Value value_)
-        : Expression(typeOf(value_))
+        : Expression(Kind::Literal, typeOf(value_))
         , value(value_)
     {}
     
     Literal(type::Array type_, std::vector<Value> value_)
-        : Expression(type_)
+        : Expression(Kind::Literal, type_)
         , value(value_)
     {}
 
@@ -31,7 +31,8 @@ public:
     void eachChild(const std::function<void(const Expression&)>&) const override {}
     
     bool operator==(const Expression& e) const override {
-        if (auto rhs = dynamic_cast<const Literal*>(&e)) {
+        if (e.getKind() == Kind::Literal) {
+            auto rhs = static_cast<const Literal*>(&e);
             return value == rhs->value;
         }
         return false;