Remove thrust::get<0>() calls on a scalar variable. (#4851)

Close Issue #4846

Remove `thrust::get<0>()` calls on integer type variables. This shouldn't compile but this successfully compiles in the current build environment, so this hasn't been detected.

Authors:
  - Seunghwa Kang (https://github.com/seunghwak)

Approvers:
  - Chuck Hastings (https://github.com/ChuckHastings)

URL: #4851

cpp/src/sampling/neighbor_sampling_impl.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022-2024, NVIDIA CORPORATION.
+ * Copyright (c) 2022-2025, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -184,7 +184,7 @@ neighbor_sample_impl(raft::handle_t const& handle,
 
   std::vector<size_t> level_sizes{};
 
-  for (auto hop = 0; hop < num_hops; hop++) {
+  for (size_t hop = 0; hop < num_hops; ++hop) {
     rmm::device_uvector<vertex_t> level_result_src(0, handle.get_stream());
     rmm::device_uvector<vertex_t> level_result_dst(0, handle.get_stream());
 

cpp/src/sampling/sampling_post_processing_impl.cuh

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023-2024, NVIDIA CORPORATION.
+ * Copyright (c) 2023-2025, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1391,12 +1391,10 @@ compute_vertex_renumber_map(
           [offsets = *vertex_type_offsets] __device__(auto lhs, auto rhs) {
             auto lhs_v_type = thrust::distance(
               offsets.begin() + 1,
-              thrust::upper_bound(
-                thrust::seq, offsets.begin() + 1, offsets.end(), thrust::get<0>(lhs)));
+              thrust::upper_bound(thrust::seq, offsets.begin() + 1, offsets.end(), lhs));
             auto rhs_v_type = thrust::distance(
               offsets.begin() + 1,
-              thrust::upper_bound(
-                thrust::seq, offsets.begin() + 1, offsets.end(), thrust::get<0>(rhs)));
+              thrust::upper_bound(thrust::seq, offsets.begin() + 1, offsets.end(), rhs));
             return lhs_v_type < rhs_v_type;
           });
       }