zanmato1984 commented on code in PR #46180:
URL: https://github.com/apache/arrow/pull/46180#discussion_r2052854613


##########
cpp/src/arrow/meson.build:
##########
@@ -371,6 +366,9 @@ if needs_json
             'dependencies': [rapidjson_dep],
         },
     }
+
+    arrow_util_srcs += 'ipc/json_simple.cc'

Review Comment:
   I'm a little confused, isn't `ipc/json_simple.cc` moved to 
`util/from_json.cc`?



##########
cpp/src/arrow/CMakeLists.txt:
##########
@@ -620,6 +624,11 @@ if(ARROW_WITH_OPENTELEMETRY)
     target_link_libraries(${ARROW_UTIL_TARGET} PRIVATE 
${ARROW_OPENTELEMETRY_LIBS})
   endforeach()
 endif()
+if(ARROW_WITH_RAPIDJSON)

Review Comment:
   Do we still need line 930~934?
   ```
     if(ARROW_JSON)
       foreach(ARROW_IPC_TARGET ${ARROW_IPC_TARGETS})
         target_link_libraries(${ARROW_IPC_TARGET} PRIVATE RapidJSON)
       endforeach()
     endif()
   ```



##########
cpp/src/arrow/acero/hash_join_node_test.cc:
##########
@@ -1397,16 +1397,16 @@ TEST(HashJoin, Dictionary) {
       TestHashJoinDictionaryHelper(
           JoinType::FULL_OUTER, JoinKeyCmp::EQ, parallel,
           // Input
-          ArrayFromJSON(utf8(), R"(["a", "c", "c", "d"])"),
+          arrow::ArrayFromJSON(utf8(), R"(["a", "c", "c", "d"])"),

Review Comment:
   Maybe declaring `using arrow::ArrayFromJSON;` at the beginning of this file 
will do?



##########
docs/source/cpp/api/array.rst:
##########
@@ -110,3 +110,9 @@ Utilities
    :project: arrow_cpp
    :members:
    :undoc-members:
+
+.. _api-array-from-json:
+
+.. doxygengroup:: array-from-json

Review Comment:
   Is this section ill-formed? I saw "group array-from-json" rendered out in 
the output document.
   <img width="758" alt="Screenshot 2025-04-21 at 13 48 15" 
src="https://github.com/user-attachments/assets/be30cd8c-9ec4-4ee4-88f7-9d4071ac97d8";
 />
   



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