move cast_kernels > kernels/cast

rust/arrow/src/compute/cast_kernels.rs → rust/arrow/src/compute/kernels/cast.rs

@@ -15,23 +15,7 @@
 // specific language governing permissions and limitations
 // under the License.
 
-//! Defines cast kernels for `ArrayRef`.
-//!
-//! Allows casting arrays between supported datatypes.
-//!
-//! ## Behavior
-//!
-//! * Boolean to Utf8: `true` => '1', `false` => `0`
-//! * Utf8 to numeric: strings that can't be parsed to numbers return null, float strings
-//! in integer casts return null
-//! * Numeric to boolean: 0 returns `false`, any other value returns `true`
-//!
-//! ## Unsupported Casts
-//!
-//! * To or from `StructArray`
-//! * To or from `ListArray`
-//! * Boolean to float
-//! * Utf8 to boolean
+//! Defines cast kernels for `ArrayRef`, allowing casting arrays between supported datatypes.
 //!
 //! Example:
 //!
@@ -123,6 +107,18 @@ macro_rules! cast_bool_to_numeric {
 }
 
 /// Cast array to provided data type
+///
+/// Behavior:
+/// * Boolean to Utf8: `true` => '1', `false` => `0`
+/// * Utf8 to numeric: strings that can't be parsed to numbers return null, float strings
+/// in integer casts return null
+/// * Numeric to boolean: 0 returns `false`, any other value returns `true`
+///
+/// Unsupported Casts
+/// * To or from `StructArray`
+/// * To or from `ListArray`
+/// * Boolean to float
+/// * Utf8 to boolean
 pub fn cast(array: &ArrayRef, to_type: &DataType) -> Result<ArrayRef> {
  use DataType::*;
  let from_type = array.data_type();

rust/arrow/src/compute/kernels/mod.rs

@@ -0,0 +1,20 @@
+// 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.
+
+//! Computation kernels on Arrow Arrays
+
+pub mod cast;

rust/arrow/src/compute/mod.rs

@@ -20,13 +20,13 @@
 pub mod arithmetic_kernels;
 pub mod array_ops;
 pub mod boolean_kernels;
-pub mod cast_kernels;
 pub mod comparison_kernels;
+pub mod kernels;
 
 mod util;
 
 pub use self::arithmetic_kernels::*;
 pub use self::array_ops::*;
 pub use self::boolean_kernels::*;
-pub use self::cast_kernels::*;
 pub use self::comparison_kernels::*;
+pub use self::kernels::cast::*;