[core] Filter operator==

1 files changed, 59 insertions, 1 deletions

diff --git a/include/mbgl/style/filter.hpp b/include/mbgl/style/filter.hpp
index dd2b20cd0d..e5d8081d82 100644
--- a/include/mbgl/style/filter.hpp
+++ b/include/mbgl/style/filter.hpp
@@ -6,85 +6,143 @@
 
 #include <string>
 #include <vector>
+#include <tuple>
 
 namespace mbgl {
 namespace style {
 
 class Filter;
 
-class NullFilter {};
+class NullFilter {
+public:
+    friend bool operator==(const NullFilter&, const NullFilter&) {
+        return true;
+    }
+};
 
 class EqualsFilter {
 public:
     std::string key;
     Value value;
+
+    friend bool operator==(const EqualsFilter& lhs, const EqualsFilter& rhs) {
+        return std::tie(lhs.key, lhs.value) == std::tie(rhs.key, rhs.value);
+    }
 };
 
 class NotEqualsFilter {
 public:
     std::string key;
     Value value;
+
+    friend bool operator==(const NotEqualsFilter& lhs, const NotEqualsFilter& rhs) {
+        return std::tie(lhs.key, lhs.value) == std::tie(rhs.key, rhs.value);
+    }
 };
 
 class LessThanFilter {
 public:
     std::string key;
     Value value;
+
+    friend bool operator==(const LessThanFilter& lhs, const LessThanFilter& rhs) {
+        return std::tie(lhs.key, lhs.value) == std::tie(rhs.key, rhs.value);
+    }
 };
 
 class LessThanEqualsFilter {
 public:
     std::string key;
     Value value;
+
+    friend bool operator==(const LessThanEqualsFilter& lhs, const LessThanEqualsFilter& rhs) {
+        return std::tie(lhs.key, lhs.value) == std::tie(rhs.key, rhs.value);
+    }
 };
 
 class GreaterThanFilter {
 public:
     std::string key;
     Value value;
+
+    friend bool operator==(const GreaterThanFilter& lhs, const GreaterThanFilter& rhs) {
+        return std::tie(lhs.key, lhs.value) == std::tie(rhs.key, rhs.value);
+    }
 };
 
 class GreaterThanEqualsFilter {
 public:
     std::string key;
     Value value;
+
+    friend bool operator==(const GreaterThanEqualsFilter& lhs, const GreaterThanEqualsFilter& rhs) {
+        return std::tie(lhs.key, lhs.value) == std::tie(rhs.key, rhs.value);
+    }
 };
 
 class InFilter {
 public:
     std::string key;
     std::vector<Value> values;
+
+    friend bool operator==(const InFilter& lhs, const InFilter& rhs) {
+        return std::tie(lhs.key, lhs.values) == std::tie(rhs.key, rhs.values);
+    }
 };
 
 class NotInFilter {
 public:
     std::string key;
     std::vector<Value> values;
+
+    friend bool operator==(const NotInFilter& lhs, const NotInFilter& rhs) {
+        return std::tie(lhs.key, lhs.values) == std::tie(rhs.key, rhs.values);
+    }
 };
 
 class AnyFilter {
 public:
     std::vector<Filter> filters;
+
+    friend bool operator==(const AnyFilter& lhs, const AnyFilter& rhs) {
+        return lhs.filters == rhs.filters;
+    }
 };
 
 class AllFilter {
 public:
     std::vector<Filter> filters;
+
+    friend bool operator==(const AllFilter& lhs, const AllFilter& rhs) {
+        return lhs.filters == rhs.filters;
+    }
 };
 
 class NoneFilter {
 public:
     std::vector<Filter> filters;
+
+    friend bool operator==(const NoneFilter& lhs, const NoneFilter& rhs) {
+        return lhs.filters == rhs.filters;
+    }
 };
 
 class HasFilter {
 public:
     std::string key;
+
+    friend bool operator==(const HasFilter& lhs, const HasFilter& rhs) {
+        return lhs.key == rhs.key;
+    }
 };
 
 class NotHasFilter {
 public:
     std::string key;
+
+    friend bool operator==(const NotHasFilter& lhs, const NotHasFilter& rhs) {
+        return lhs.key == rhs.key;
+    }
 };
 
 using FilterBase = variant<