Fix cpp deprecation.

src/common/transform_iterator.h

@@ -1,12 +1,12 @@
 /**
- * Copyright 2022 by XGBoost Contributors
+ * Copyright 2022-2024, XGBoost Contributors
  */
 #ifndef XGBOOST_COMMON_TRANSFORM_ITERATOR_H_
 #define XGBOOST_COMMON_TRANSFORM_ITERATOR_H_
 
 #include <cstddef>      // std::size_t
 #include <iterator>     // std::random_access_iterator_tag
-#include <type_traits>  // std::result_of_t, std::add_pointer_t, std::add_lvalue_reference_t
+#include <type_traits>  // for invoke_result_t, add_pointer_t, add_lvalue_reference_t
 #include <utility>      // std::forward
 
 #include "xgboost/span.h"  // ptrdiff_t
@@ -25,11 +25,11 @@ class IndexTransformIter {
   Fn fn_;
 
  public:
-  using iterator_category = std::random_access_iterator_tag;  // NOLINT
-  using reference = std::result_of_t<Fn(std::size_t)>;        // NOLINT
-  using value_type = std::remove_cv_t<std::remove_reference_t<reference>>; // NOLINT
-  using difference_type = detail::ptrdiff_t;                  // NOLINT
-  using pointer = std::add_pointer_t<value_type>;             // NOLINT
+  using iterator_category = std::random_access_iterator_tag;                // NOLINT
+  using reference = std::invoke_result_t<Fn, std::size_t>;                  // NOLINT
+  using value_type = std::remove_cv_t<std::remove_reference_t<reference>>;  // NOLINT
+  using difference_type = detail::ptrdiff_t;                                // NOLINT
+  using pointer = std::add_pointer_t<value_type>;                           // NOLINT
 
  public:
   /**

src/data/array_interface.h

@@ -1,5 +1,5 @@
 /**
- * Copyright 2019-2023 by XGBoost Contributors
+ * Copyright 2019-2024, XGBoost Contributors
  * \file array_interface.h
  * \brief View of __array_interface__
  */
@@ -12,7 +12,7 @@
 #include <limits>  // for numeric_limits
 #include <map>
 #include <string>
-#include <type_traits>  // std::alignment_of,std::remove_pointer_t
+#include <type_traits>  // for alignment_of, remove_pointer_t, invoke_result_t
 #include <utility>
 #include <vector>
 
@@ -643,7 +643,7 @@ auto DispatchDType(ArrayInterfaceHandler::Type dtype, Fn dispatch) {
     }
   }
 
-  return std::result_of_t<Fn(std::int8_t)>();
+  return std::invoke_result_t<Fn, std::int8_t>();
 }
 
 template <std::int32_t D, typename Fn>

src/data/proxy_dmatrix.h

@@ -1,12 +1,13 @@
 /**
- * Copyright 2020-2023, XGBoost contributors
+ * Copyright 2020-2024, XGBoost contributors
  */
 #ifndef XGBOOST_DATA_PROXY_DMATRIX_H_
 #define XGBOOST_DATA_PROXY_DMATRIX_H_
 
 #include <any>  // for any, any_cast
 #include <memory>
 #include <string>
+#include <type_traits>  // for invoke_result_t
 #include <utility>
 
 #include "adapter.h"
@@ -171,10 +172,10 @@ decltype(auto) HostAdapterDispatch(DMatrixProxy const* proxy, Fn fn, bool* type_
       LOG(FATAL) << "Unknown type: " << proxy->Adapter().type().name();
     }
     if constexpr (get_value) {
-      return std::result_of_t<Fn(
-          decltype(std::declval<std::shared_ptr<ArrayAdapter>>()->Value()))>();
+      return std::invoke_result_t<
+          Fn, decltype(std::declval<std::shared_ptr<ArrayAdapter>>()->Value())>();
     } else {
-      return std::result_of_t<Fn(decltype(std::declval<std::shared_ptr<ArrayAdapter>>()))>();
+      return std::invoke_result_t<Fn, decltype(std::declval<std::shared_ptr<ArrayAdapter>>())>();
     }
   }
 }