From 46fcfeb4656cc4144b0332eeb7b3c202f3f76f98 Mon Sep 17 00:00:00 2001
From: Sutou Kouhei <kou@clear-code.com>
Date: Sat, 7 Oct 2023 06:36:15 +0900
Subject: [PATCH] GH-38090: [C++][Emscripten] chunked_array: Suppress
 shorten-64-to-32 warnings

We need explicit cast to use `int64_t` for `size_t` on Emscripten.

Explicit casts.
---
 cpp/src/arrow/chunked_array.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpp/src/arrow/chunked_array.cc b/cpp/src/arrow/chunked_array.cc
index 12937406e7800..3523059647900 100644
--- a/cpp/src/arrow/chunked_array.cc
+++ b/cpp/src/arrow/chunked_array.cc
@@ -172,7 +172,7 @@ Result<std::shared_ptr<Scalar>> ChunkedArray::GetScalar(int64_t index) const {
     return Status::IndexError("index with value of ", index,
                               " is out-of-bounds for chunked array of length ", length_);
   }
-  return chunks_[loc.chunk_index]->GetScalar(loc.index_in_chunk);
+  return chunks_[static_cast<size_t>(loc.chunk_index)]->GetScalar(loc.index_in_chunk);
 }
 
 std::shared_ptr<ChunkedArray> ChunkedArray::Slice(int64_t offset, int64_t length) const {