[GitHub] [arrow-datafusion] ozankabak commented on a diff in pull request #6657: RowAccumulators support generics

["ozankabak (via GitHub)" <gi...@apache.org>]

ozankabak commented on code in PR #6657:
URL: https://github.com/apache/arrow-datafusion/pull/6657#discussion_r1241295359


##########
datafusion/physical-expr/src/aggregate/row_agg_macros.rs:
##########
@@ -0,0 +1,525 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#[macro_export]
+macro_rules! matches_all_supported_data_types {
+    ($expression:expr) => {
+        matches!(
+            $expression,
+            DataType::Boolean
+                | DataType::UInt8
+                | DataType::UInt16
+                | DataType::UInt32
+                | DataType::UInt64
+                | DataType::Int8
+                | DataType::Int16
+                | DataType::Int32
+                | DataType::Int64
+                | DataType::Float32
+                | DataType::Float64
+                | DataType::Decimal128(_, _)
+        )
+    };
+}
+pub use matches_all_supported_data_types;
+
+#[macro_export]
+macro_rules! dispatch_all_supported_data_types {
+    ($macro:ident $(, $x:ident)*) => {
+        $macro! {
+                [$($x),*],
+                { Boolean, BooleanArray },
+                { Int8, Int8Array },
+                { Int16, Int16Array },
+                { Int32, Int32Array },
+                { Int64, Int64Array },
+                { UInt8, UInt8Array },
+                { UInt16, UInt16Array },
+                { UInt32, UInt32Array },
+                { UInt64, UInt64Array },
+                { Float32, Float32Array },
+                { Float64, Float64Array },
+                { Decimal128, Decimal128Array }
+        }
+    };
+}
+
+pub use dispatch_all_supported_data_types;
+
+// TODO generate the matching type pairs
+#[macro_export]

Review Comment:
   > I will think about this as I sleep tonight
   
   This made me smile -- such is the life of an engineer 🤣 



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