expose integer label get/set

Author: Sanhaoji2

include/abstract_index.h

@@ -112,6 +112,9 @@ class AbstractIndex
 
     template <typename label_type> void set_universal_label(const label_type universal_label);
 
+    virtual void enable_integer_label() = 0;
+    virtual bool integer_label_enabled() const = 0;
+
     virtual bool is_label_valid(const std::string &raw_label) const = 0;
     virtual bool is_set_universal_label() const = 0;
     virtual TableStats get_table_stats() const = 0;

include/index.h

@@ -119,9 +119,9 @@ template <typename T, typename TagT = uint32_t, typename LabelT = uint32_t> clas
 
     DISKANN_DLLEXPORT bool is_set_universal_label() const override;
 
-    DISKANN_DLLEXPORT void enable_integer_label();
+    DISKANN_DLLEXPORT void enable_integer_label() override;
 
-    DISKANN_DLLEXPORT bool integer_label_enabled();
+    DISKANN_DLLEXPORT bool integer_label_enabled() const override;
 
     // Set starting point of an index before inserting any points incrementally.
     // The data count should be equal to _num_frozen_pts * _aligned_dim.

src/index.cpp

@@ -2073,7 +2073,7 @@ void Index<T, TagT, LabelT>::enable_integer_label()
 }
 
 template <typename T, typename TagT, typename LabelT>
-bool Index<T, TagT, LabelT>::integer_label_enabled()
+bool Index<T, TagT, LabelT>::integer_label_enabled() const
 {
     return _use_integer_labels;
 }