Separate ast module

kmath-ast/build.gradle.kts

@@ -0,0 +1,16 @@
+plugins {
+    id("scientifik.mpp")
+}
+
+repositories{
+    maven("https://dl.bintray.com/hotkeytlt/maven")
+}
+
+kotlin.sourceSets {
+    commonMain {
+        dependencies {
+            api(project(":kmath-core"))
+            implementation("com.github.h0tk3y.betterParse:better-parse-multiplatform:0.4.0-alpha3")
+        }
+    }
+}

kmath-ast/src/commonMain/kotlin/scientifik/kmath/ast/MathSyntaxTree.kt

@@ -1,4 +1,4 @@
-package scientifik.kmath.expressions
+package scientifik.kmath.ast
 
 import scientifik.kmath.operations.NumericAlgebra
 import scientifik.kmath.operations.RealField

kmath-ast/src/jvmMain/kotlin/scientifik/kmath/ast/asm.kt

@@ -0,0 +1,23 @@
+package scientifik.kmath.ast
+
+import scientifik.kmath.expressions.Expression
+import scientifik.kmath.operations.Algebra
+import scientifik.kmath.operations.NumericAlgebra
+
+//TODO stubs for asm generation
+
+interface AsmExpression<T>
+
+interface AsmExpressionAlgebra<T, A : Algebra<T>> : NumericAlgebra<AsmExpression<T>> {
+    val algebra: A
+}
+
+fun <T> AsmExpression<T>.compile(): Expression<T> = TODO()
+
+//TODO add converter for functional expressions
+
+inline fun <reified T : Any, A : Algebra<T>> A.asm(
+    block: AsmExpressionAlgebra<T, A>.() -> AsmExpression<T>
+): Expression<T> = TODO()
+
+inline fun <reified T : Any, A : Algebra<T>> A.asm(ast: MathSyntaxTree): Expression<T> = asm { compile(ast) }

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

@@ -2,7 +2,7 @@ package scientifik.kmath.commons.expressions
 
 import org.apache.commons.math3.analysis.differentiation.DerivativeStructure
 import scientifik.kmath.expressions.Expression
-import scientifik.kmath.expressions.ExpressionContext
+import scientifik.kmath.expressions.ExpressionAlgebra
 import scientifik.kmath.operations.ExtendedField
 import scientifik.kmath.operations.Field
 import kotlin.properties.ReadOnlyProperty
@@ -113,7 +113,7 @@ fun DiffExpression.derivative(name: String) = derivative(name to 1)
 /**
  * A context for [DiffExpression] (not to be confused with [DerivativeStructure])
  */
-object DiffExpressionContext : ExpressionContext<Double, DiffExpression>, Field<DiffExpression> {
+object DiffExpressionAlgebra : ExpressionAlgebra<Double, DiffExpression>, Field<DiffExpression> {
     override fun variable(name: String, default: Double?) =
         DiffExpression { variable(name, default?.const()) }
 

kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/Expression.kt

@@ -14,7 +14,7 @@ operator fun <T> Expression<T>.invoke(vararg pairs: Pair<String, T>): T = invoke
 /**
  * A context for expression construction
  */
-interface ExpressionContext<T, E> : Algebra<E> {
+interface ExpressionAlgebra<T, E> : Algebra<E> {
     /**
      * Introduce a variable into expression context
      */

kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/functionalExpressions.kt

@@ -21,8 +21,11 @@ internal class SumExpression<T>(
     override fun invoke(arguments: Map<String, T>): T = context.add(first.invoke(arguments), second.invoke(arguments))
 }
 
-internal class ProductExpression<T>(val context: Ring<T>, val first: Expression<T>, val second: Expression<T>) :
+internal class ProductExpression<T>(
-    Expression<T> {
+    val context: Ring<T>,
+    val first: Expression<T>,
+    val second: Expression<T>
+) : Expression<T> {
     override fun invoke(arguments: Map<String, T>): T =
         context.multiply(first.invoke(arguments), second.invoke(arguments))
 }
@@ -39,7 +42,7 @@ internal class DivExpession<T>(val context: Field<T>, val expr: Expression<T>, v
 
 open class FunctionalExpressionSpace<T>(
     val space: Space<T>
-) : Space<Expression<T>>, ExpressionContext<T,Expression<T>> {
+) : Space<Expression<T>>, ExpressionAlgebra<T, Expression<T>> {
 
     override val zero: Expression<T> = ConstantExpression(space.zero)
 
@@ -61,12 +64,12 @@ open class FunctionalExpressionSpace<T>(
 
 open class FunctionalExpressionField<T>(
     val field: Field<T>
-) :  Field<Expression<T>>, ExpressionContext<T,Expression<T>>, FunctionalExpressionSpace<T>(field) {
+) : Field<Expression<T>>, ExpressionAlgebra<T, Expression<T>>, FunctionalExpressionSpace<T>(field) {
 
     override val one: Expression<T>
         get() = const(this.field.one)
 
-    fun const(value: Double): Expression<T> = const(field.run { one*value})
+    fun const(value: Double): Expression<T> = const(field.run { one * value })
 
     override fun multiply(a: Expression<T>, b: Expression<T>): Expression<T> = ProductExpression(field, a, b)
 

kmath-core/src/jvmMain/kotlin/scientifik/kmath/operations/bigNumbers.kt

@@ -1,10 +1,12 @@
 package scientifik.kmath.operations
 
-import scientifik.kmath.structures.*
 import java.math.BigDecimal
 import java.math.BigInteger
 import java.math.MathContext
 
+/**
+ * A field wrapper for Java [BigInteger]
+ */
 object JBigIntegerField : Field<BigInteger> {
     override val zero: BigInteger = BigInteger.ZERO
     override val one: BigInteger = BigInteger.ONE
@@ -18,6 +20,9 @@ object JBigIntegerField : Field<BigInteger> {
     override fun divide(a: BigInteger, b: BigInteger): BigInteger = a.div(b)
 }
 
+/**
+ * A Field wrapper for Java [BigDecimal]
+ */
 class JBigDecimalField(val mathContext: MathContext = MathContext.DECIMAL64) : Field<BigDecimal> {
     override val zero: BigDecimal = BigDecimal.ZERO
     override val one: BigDecimal = BigDecimal.ONE

settings.gradle.kts

@@ -44,5 +44,6 @@ include(
     ":kmath-dimensions",
     ":kmath-for-real",
     ":kmath-geometry",
+    ":kmath-ast",
     ":examples"
 )