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-rw-r--r--src/mbgl/renderer/layers/render_custom_layer.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mbgl/renderer/layers/render_custom_layer.cpp b/src/mbgl/renderer/layers/render_custom_layer.cpp
index 75c21997b0..c53286a2a0 100644
--- a/src/mbgl/renderer/layers/render_custom_layer.cpp
+++ b/src/mbgl/renderer/layers/render_custom_layer.cpp
@@ -14,10 +14,15 @@ namespace mbgl {
using namespace style;
+namespace {
+
inline const CustomLayer::Impl& impl(const Immutable<style::Layer::Impl>& impl) {
+ assert(impl->getTypeInfo() == CustomLayer::Impl::staticTypeInfo());
return static_cast<const CustomLayer::Impl&>(*impl);
}
+} // namespace
+
RenderCustomLayer::RenderCustomLayer(Immutable<style::CustomLayer::Impl> _impl)
: RenderLayer(makeMutable<CustomLayerProperties>(std::move(_impl))),
host(impl(baseImpl).host) {