Removed GenericNDField. Additional cleanup

benchmarks/src/main/kotlin/scientifik/kmath/structures/NDFieldBenchmark.kt

@@ -9,7 +9,7 @@ fun main(args: Array<String>) {
 
     val bufferedField = NDField.auto(intArrayOf(dim, dim), RealField)
     val specializedField = NDField.real(intArrayOf(dim, dim))
-    val genericField = NDField.generic(intArrayOf(dim, dim), RealField)
+    val genericField = NDField.buffered(intArrayOf(dim, dim), RealField)
     val lazyNDField = NDField.lazy(intArrayOf(dim, dim), RealField)
 
 //    val action: NDField<Double, DoubleField, NDStructure<Double>>.() -> Unit = {
@@ -75,7 +75,7 @@ fun main(args: Array<String>) {
     val genericTime = measureTimeMillis {
         //genericField.run(action)
         genericField.run {
-            var res = one
+            var res: NDBuffer<Double> = one
             repeat(n) {
                 res += 1.0
             }

kmath-core/src/commonMain/kotlin/scientifik/kmath/misc/Grids.kt

@@ -32,6 +32,6 @@ fun ClosedFloatingPointRange<Double>.toSequence(step: Double): Sequence<Double>
  * Convert double range to array of evenly spaced doubles, where the size of array equals [numPoints]
  */
 fun ClosedFloatingPointRange<Double>.toGrid(numPoints: Int): DoubleArray {
-    if (numPoints < 2) error("Can't generic grid with less than two points")
+    if (numPoints < 2) error("Can't buffered grid with less than two points")
     return DoubleArray(numPoints) { i -> start + (endInclusive - start) / (numPoints - 1) * i }
 }

kmath-core/src/commonMain/kotlin/scientifik/kmath/structures/NDElement.kt

@@ -35,24 +35,22 @@ object NDElements {
     /**
      * Simple boxing NDArray
      */
-    fun <T : Any, F : Field<T>> generic(
+    fun <T : Any, F : Field<T>> buffered(
         shape: IntArray,
         field: F,
         initializer: F.(IntArray) -> T
-    ): GenericNDElement<T, F> {
+    ): BufferNDElement<T, F> {
-        val ndField = GenericNDField(shape, field)
+        val ndField = BufferNDField(shape, field, ::boxingBuffer)
-        val structure = ndStructure(shape) { index -> field.initializer(index) }
+        return ndField.produce(initializer)
-        return GenericNDElement(ndField, structure)
     }
 
-    inline fun <reified T : Any, F : Field<T>> inline(
+    inline fun <reified T : Any, F : Field<T>> auto(
         shape: IntArray,
         field: F,
         noinline initializer: F.(IntArray) -> T
-    ): GenericNDElement<T, F> {
+    ): BufferNDElement<T, F> {
-        val ndField = GenericNDField(shape, field)
+        val ndField = NDField.auto(shape, field)
-        val structure = ndStructure(shape, ::autoBuffer) { index -> field.initializer(index) }
+        return ndField.produce(initializer)
-        return GenericNDElement(ndField, structure)
     }
 }
 

kmath-core/src/commonMain/kotlin/scientifik/kmath/structures/NDField.kt

@@ -22,43 +22,10 @@ interface NDField<T, F : Field<T>, N : NDStructure<T>> : Field<N> {
     val elementField: F
 
     fun produce(initializer: F.(IntArray) -> T): N
-
     fun map(arg: N, transform: F.(T) -> T): N
-
     fun mapIndexed(arg: N, transform: F.(index: IntArray, T) -> T): N
-
     fun combine(a: N, b: N, transform: F.(T, T) -> T): N
 
-    /**
-     * Element by element application of any operation on elements to the whole array. Just like in numpy
-     */
-    operator fun Function1<T, T>.invoke(structure: N): N
-
-    /**
-     * Summation operation for [NDElements] and single element
-     */
-    operator fun N.plus(arg: T): N
-
-    /**
-     * Subtraction operation between [NDElements] and single element
-     */
-    operator fun N.minus(arg: T): N
-
-    /**
-     * Product operation for [NDElements] and single element
-     */
-    operator fun N.times(arg: T): N
-
-    /**
-     * Division operation between [NDElements] and single element
-     */
-    operator fun N.div(arg: T): N
-
-    operator fun T.plus(arg: N): N
-    operator fun T.minus(arg: N): N
-    operator fun T.times(arg: N): N
-    operator fun T.div(arg: N): N
-
     companion object {
         /**
          * Create a nd-field for [Double] values
@@ -68,14 +35,14 @@ interface NDField<T, F : Field<T>, N : NDStructure<T>> : Field<N> {
         /**
          * Create a nd-field with boxing generic buffer
          */
-        fun <T : Any, F : Field<T>> generic(shape: IntArray, field: F) = GenericNDField(shape, field)
+        fun <T : Any, F : Field<T>> buffered(shape: IntArray, field: F) =
+            BufferNDField(shape, field, ::boxingBuffer)
 
         /**
          * Create a most suitable implementation for nd-field using reified class.
          */
-        inline fun <reified T : Any, F : Field<T>> auto(shape: IntArray, field: F): BufferNDField<T, F> {
+        inline fun <reified T : Any, F : Field<T>> auto(shape: IntArray, field: F) =
-            return BufferNDField(shape, field, ::autoBuffer)
+            BufferNDField(shape, field, ::autoBuffer)
-        }
     }
 }
 
@@ -88,16 +55,16 @@ abstract class AbstractNDField<T, F : Field<T>, N : NDStructure<T>>(
 
     override val one: N by lazy { produce { one } }
 
-    final override operator fun Function1<T, T>.invoke(structure: N) = map(structure) { value -> this@invoke(value) }
+    operator fun Function1<T, T>.invoke(structure: N) = map(structure) { value -> this@invoke(value) }
-    final override operator fun N.plus(arg: T) = map(this) { value -> elementField.run { arg + value } }
+    operator fun N.plus(arg: T) = map(this) { value -> elementField.run { arg + value } }
-    final override operator fun N.minus(arg: T) = map(this) { value -> elementField.run { arg - value } }
+    operator fun N.minus(arg: T) = map(this) { value -> elementField.run { arg - value } }
-    final override operator fun N.times(arg: T) = map(this) { value -> elementField.run { arg * value } }
+    operator fun N.times(arg: T) = map(this) { value -> elementField.run { arg * value } }
-    final override operator fun N.div(arg: T) = map(this) { value -> elementField.run { arg / value } }
+    operator fun N.div(arg: T) = map(this) { value -> elementField.run { arg / value } }
 
-    final override operator fun T.plus(arg: N) = arg + this
+    operator fun T.plus(arg: N) = arg + this
-    final override operator fun T.minus(arg: N) = arg - this
+    operator fun T.minus(arg: N) = arg - this
-    final override operator fun T.times(arg: N) = arg * this
+    operator fun T.times(arg: N) = arg * this
-    final override operator fun T.div(arg: N) = arg / this
+    operator fun T.div(arg: N) = arg / this
 
 
     /**
@@ -136,22 +103,3 @@ abstract class AbstractNDField<T, F : Field<T>, N : NDStructure<T>>(
         }
     }
 }
-
-class GenericNDField<T : Any, F : Field<T>>(
-    shape: IntArray,
-    elementField: F,
-    val bufferFactory: BufferFactory<T> = ::boxingBuffer
-) : AbstractNDField<T, F, NDStructure<T>>(shape, elementField) {
-
-    override fun produce(initializer: F.(IntArray) -> T): NDStructure<T> =
-        ndStructure(shape, bufferFactory) { elementField.initializer(it) }
-
-    override fun map(arg: NDStructure<T>, transform: F.(T) -> T): NDStructure<T> =
-        produce { index -> transform(arg.get(index)) }
-
-    override fun mapIndexed(arg: NDStructure<T>, transform: F.(index: IntArray, T) -> T): NDStructure<T> =
-        produce { index -> transform(index, arg.get(index)) }
-
-    override fun combine(a: NDStructure<T>, b: NDStructure<T>, transform: F.(T, T) -> T): NDStructure<T> =
-        produce { index -> transform(a[index], b[index]) }
-}

kmath-coroutines/src/commonTest/kotlin/scientifik/kmath/structures/LazyNDFieldTest.kt

@@ -9,7 +9,7 @@ class LazyNDFieldTest {
     @Test
     fun testLazyStructure() {
         var counter = 0
-        val regularStructure = NDField.generic(intArrayOf(2, 2, 2), IntField).produce { it[0] + it[1] - it[2] }
+        val regularStructure = NDField.auto(intArrayOf(2, 2, 2), IntField).produce { it[0] + it[1] - it[2] }
         val result = (regularStructure.lazy(IntField) + 2).map {
             counter++
             it * it