Add parent and child accessor functions for OGSubgraphRef

Author: jcmosc

Sources/OpenGraphCxx/Graph/OGSubgraph.cpp

@@ -136,6 +136,31 @@ void OGSubgraphRemoveChild(OGSubgraphRef parent, OGSubgraphRef child) {
     // TODO
 }
 
+OGSubgraphRef OGSubgraphGetChild(OGSubgraphRef cf_subgraph, uint32_t index, uint8_t *_Nullable tag_out) {
+    // TODO
+    return nullptr;
+}
+
+uint32_t OGSubgraphGetChildCount(OGSubgraphRef cf_subgraph) {
+    // TODO
+    return 0;
+}
+
+OGSubgraphRef OGSubgraphGetParent(OGSubgraphRef cf_subgraph, int64_t index) {
+    // TODO
+    return nullptr;
+}
+
+uint64_t OGSubgraphGetParentCount(OGSubgraphRef cf_subgraph) {
+    // TODO
+    return 0;
+}
+
+bool OGSubgraphIsAncestor(OGSubgraphRef cf_subgraph, OGSubgraphRef other) {
+    // TODO
+    return false;
+}
+
 void OGSubgraphApply(OGSubgraphRef cf_subgraph,
                      OGAttributeFlags flags,
                      const void (*function)(const void * _Nullable context OG_SWIFT_CONTEXT, OGAttribute attribute) OG_SWIFT_CC(swift),

Sources/OpenGraphCxx/include/OpenGraph/OGSubgraph.h

@@ -68,6 +68,26 @@ OG_EXPORT
 OG_REFINED_FOR_SWIFT
 void OGSubgraphRemoveChild(OGSubgraphRef parent, OGSubgraphRef child) OG_SWIFT_NAME(OGSubgraphRef.removeChild(self:_:));
 
+OG_EXPORT
+OG_REFINED_FOR_SWIFT
+OGSubgraphRef OGSubgraphGetChild(OGSubgraphRef cf_subgraph, uint32_t index, uint8_t *_Nullable tag_out) OG_SWIFT_NAME(OGSubgraphRef.child(self:at:tag:));
+
+OG_EXPORT
+OG_REFINED_FOR_SWIFT
+uint32_t OGSubgraphGetChildCount(OGSubgraphRef cf_subgraph) OG_SWIFT_NAME(getter:OGSubgraphRef.childCount(self:));
+
+OG_EXPORT
+OG_REFINED_FOR_SWIFT
+OGSubgraphRef OGSubgraphGetParent(OGSubgraphRef cf_subgraph, int64_t index) OG_SWIFT_NAME(OGSubgraphRef.parent(self:at:));
+
+OG_EXPORT
+OG_REFINED_FOR_SWIFT
+uint64_t OGSubgraphGetParentCount(OGSubgraphRef cf_subgraph) OG_SWIFT_NAME(getter:OGSubgraphRef.parentCount(self:));
+
+OG_EXPORT
+OG_REFINED_FOR_SWIFT
+bool OGSubgraphIsAncestor(OGSubgraphRef cf_subgraph, OGSubgraphRef other) OG_SWIFT_NAME(OGSubgraphRef.isAncestor(self:of:));
+
 OG_EXPORT
 OG_REFINED_FOR_SWIFT
 bool OGSubgraphIntersects(OGSubgraphRef subgraph, OGAttributeFlags flags) OG_SWIFT_NAME(OGSubgraphRef.intersects(self:flags:));