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-rw-r--r--libs/ui/include/ui/LayerStack.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/libs/ui/include/ui/LayerStack.h b/libs/ui/include/ui/LayerStack.h
index d6ffeb7fad..f4c8ba250e 100644
--- a/libs/ui/include/ui/LayerStack.h
+++ b/libs/ui/include/ui/LayerStack.h
@@ -55,6 +55,10 @@ inline bool operator>(LayerStack lhs, LayerStack rhs) {
return lhs.id > rhs.id;
}
+inline bool operator<(LayerStack lhs, LayerStack rhs) {
+ return lhs.id < rhs.id;
+}
+
// A LayerFilter determines if a layer is included for output to a display.
struct LayerFilter {
LayerStack layerStack;