examples/src/main/kotlin/kscience/kmath/operations/ComplexDemo.kt

@@ -6,8 +6,8 @@ import kscience.kmath.structures.complex
 
 fun main() {
     // 2d element
-    val element = NDElement.complex(2, 2) { index: IntArray ->
-        Complex(index[0].toDouble() - index[1].toDouble(), index[0].toDouble() + index[1].toDouble())
+    val element = NDElement.complex(2, 2) { (i,j) ->
+        Complex(i.toDouble() - j.toDouble(), i.toDouble() + j.toDouble())
     }
     println(element)
 

kmath-commons/src/main/kotlin/kscience/kmath/commons/expressions/DiffExpression.kt

@@ -16,7 +16,7 @@ import kotlin.properties.ReadOnlyProperty
  */
 public class DerivativeStructureField(
     public val order: Int,
-    public val parameters: Map<String, Double>
+    public val parameters: Map<String, Double>,
 ) : ExtendedField<DerivativeStructure> {
     public override val zero: DerivativeStructure by lazy { DerivativeStructure(parameters.size, order) }
     public override val one: DerivativeStructure by lazy { DerivativeStructure(parameters.size, order, 1.0) }
@@ -85,8 +85,9 @@ public class DerivativeStructureField(
 /**
  * A constructs that creates a derivative structure with required order on-demand
  */
-public class DiffExpression(public val function: DerivativeStructureField.() -> DerivativeStructure) :
-    Expression<Double> {
+public class DiffExpression(
+    public val function: DerivativeStructureField.() -> DerivativeStructure,
+) : Expression<Double> {
     public override operator fun invoke(arguments: Map<String, Double>): Double = DerivativeStructureField(
         0,
         arguments

kmath-commons/src/test/kotlin/kscience/kmath/commons/expressions/AutoDiffTest.kt

@@ -18,7 +18,7 @@ internal inline fun <R> diff(
 internal class AutoDiffTest {
     @Test
     fun derivativeStructureFieldTest() {
-        val res = diff(3, "x" to 1.0, "y" to 1.0) {
+        val res: Double = diff(3, "x" to 1.0, "y" to 1.0) {
             val x by variable
             val y = variable("y")
             val z = x * (-sin(x * y) + y)

kmath-core/src/commonMain/kotlin/kscience/kmath/operations/Complex.kt

@@ -195,6 +195,7 @@ public data class Complex(val re: Double, val im: Double) : FieldElement<Complex
     }
 }
 
+
 /**
  * Creates a complex number with real part equal to this real.
  *

settings.gradle.kts

@@ -10,7 +10,7 @@ pluginManagement {
         maven("https://dl.bintray.com/kotlin/kotlin-dev/")
     }
 
-    val toolsVersion = "0.6.1-dev-1.4.20-M1"
+    val toolsVersion = "0.6.3-dev-1.4.20-M1"
     val kotlinVersion = "1.4.20-M1"
 
     plugins {