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Move asm dependency to implementation configuration; rename many ASM API classes, make AsmCompiledExpression implement functional Expression, fix typos, encapsulate AsmGenerationContext

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Commander Tvis 2020-06-07 19:04:39 +07:00
parent a2e33bf6d8
commit 6ac0297530
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5 changed files with 129 additions and 147 deletions
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4
kmath-asm/build.gradle.kts
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@ -4,6 +4,6 @@ plugins {
dependencies { dependencies {
api(project(path = ":kmath-core")) api(project(path = ":kmath-core"))
api("org.ow2.asm:asm:8.0.1") implementation("org.ow2.asm:asm:8.0.1")
api("org.ow2.asm:asm-commons:8.0.1") implementation("org.ow2.asm:asm-commons:8.0.1")
} }

199
kmath-asm/src/main/kotlin/scientifik/kmath/expressions/AsmExpressions.kt
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@ -8,11 +8,30 @@ import scientifik.kmath.operations.Algebra
import scientifik.kmath.operations.Field import scientifik.kmath.operations.Field
import scientifik.kmath.operations.Space import scientifik.kmath.operations.Space
abstract class AsmCompiled<T>(@JvmField val algebra: Algebra<T>, @JvmField val constants: MutableList<out Any>) { abstract class AsmCompiledExpression<T> internal constructor(
abstract fun evaluate(arguments: Map<String, T>): T @JvmField val algebra: Algebra<T>,
@JvmField val constants: MutableList<out Any>
) : Expression<T> {
abstract override fun invoke(arguments: Map<String, T>): T
} }
class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T>, private val className: String) { internal fun buildName(expression: AsmExpression<*>, collision: Int = 0): String {
val name = "scientifik.kmath.expressions.generated.AsmCompiledExpression_${expression.hashCode()}_$collision"
try {
Class.forName(name)
} catch (ignored: ClassNotFoundException) {
return name
}
return buildName(expression, collision + 1)
}
class AsmGenerationContext<T>(
classOfT: Class<*>,
private val algebra: Algebra<T>,
private val className: String
) {
private class ClassLoader(parent: java.lang.ClassLoader) : java.lang.ClassLoader(parent) { private class ClassLoader(parent: java.lang.ClassLoader) : java.lang.ClassLoader(parent) {
internal fun defineClass(name: String?, b: ByteArray): Class<*> = defineClass(name, b, 0, b.size) internal fun defineClass(name: String?, b: ByteArray): Class<*> = defineClass(name, b, 0, b.size)
} }
@ -26,30 +45,23 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
private val T_CLASS: String = classOfT.name.replace('.', '/') private val T_CLASS: String = classOfT.name.replace('.', '/')
private val slashesClassName: String = className.replace(oldChar = '.', newChar = '/') private val slashesClassName: String = className.replace(oldChar = '.', newChar = '/')
private val evaluateThisVar: Int = 0 private val invokeThisVar: Int = 0
private val evaluateArgumentsVar: Int = 1 private val invokeArgumentsVar: Int = 1
private var maxStack: Int = 0 private var maxStack: Int = 0
private lateinit var constants: MutableList<Any> private val constants: MutableList<Any> = mutableListOf()
private lateinit var asmCompiledClassWriter: ClassWriter private val asmCompiledClassWriter: ClassWriter = ClassWriter(0)
private lateinit var evaluateMethodVisitor: MethodVisitor private val invokeMethodVisitor: MethodVisitor
private lateinit var evaluateL0: Label private val invokeL0: Label
private lateinit var evaluateL1: Label private lateinit var invokeL1: Label
private var generatedInstance: AsmCompiledExpression<T>? = null
init { init {
start()
}
fun start() {
constants = mutableListOf()
asmCompiledClassWriter = ClassWriter(0)
maxStack = 0
asmCompiledClassWriter.visit( asmCompiledClassWriter.visit(
V1_8, V1_8,
ACC_PUBLIC or ACC_FINAL or ACC_SUPER, ACC_PUBLIC or ACC_FINAL or ACC_SUPER,
slashesClassName, slashesClassName,
"L$ASM_COMPILED_CLASS<L$T_CLASS;>;", "L$ASM_COMPILED_EXPRESSION_CLASS<L$T_CLASS;>;",
ASM_COMPILED_CLASS, ASM_COMPILED_EXPRESSION_CLASS,
arrayOf() arrayOf()
) )
@ -66,7 +78,7 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
visitMethodInsn( visitMethodInsn(
INVOKESPECIAL, INVOKESPECIAL,
ASM_COMPILED_CLASS, ASM_COMPILED_EXPRESSION_CLASS,
"<init>", "<init>",
"(L$ALGEBRA_CLASS;L$LIST_CLASS;)V", "(L$ALGEBRA_CLASS;L$LIST_CLASS;)V",
false false
@ -93,45 +105,48 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
visitEnd() visitEnd()
} }
evaluateMethodVisitor = visitMethod( invokeMethodVisitor = visitMethod(
ACC_PUBLIC or ACC_FINAL, ACC_PUBLIC or ACC_FINAL,
"evaluate", "invoke",
"(L$MAP_CLASS;)L$T_CLASS;", "(L$MAP_CLASS;)L$T_CLASS;",
"(L$MAP_CLASS<L$STRING_CLASS;+L$T_CLASS;>;)L$T_CLASS;", "(L$MAP_CLASS<L$STRING_CLASS;+L$T_CLASS;>;)L$T_CLASS;",
null null
) )
evaluateMethodVisitor.run { invokeMethodVisitor.run {
visitCode() visitCode()
evaluateL0 = Label() invokeL0 = Label()
visitLabel(evaluateL0) visitLabel(invokeL0)
} }
} }
} }
@PublishedApi
@Suppress("UNCHECKED_CAST") @Suppress("UNCHECKED_CAST")
fun generate(): AsmCompiled<T> { internal fun generate(): AsmCompiledExpression<T> {
evaluateMethodVisitor.run { generatedInstance?.let { return it }
invokeMethodVisitor.run {
visitInsn(ARETURN) visitInsn(ARETURN)
evaluateL1 = Label() invokeL1 = Label()
visitLabel(evaluateL1) visitLabel(invokeL1)
visitLocalVariable( visitLocalVariable(
"this", "this",
"L$slashesClassName;", "L$slashesClassName;",
T_CLASS, T_CLASS,
evaluateL0, invokeL0,
evaluateL1, invokeL1,
evaluateThisVar invokeThisVar
) )
visitLocalVariable( visitLocalVariable(
"arguments", "arguments",
"L$MAP_CLASS;", "L$MAP_CLASS;",
"L$MAP_CLASS<L$STRING_CLASS;+L$T_CLASS;>;", "L$MAP_CLASS<L$STRING_CLASS;+L$T_CLASS;>;",
evaluateL0, invokeL0,
evaluateL1, invokeL1,
evaluateArgumentsVar invokeArgumentsVar
) )
visitMaxs(maxStack + 1, 2) visitMaxs(maxStack + 1, 2)
@ -140,7 +155,7 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
asmCompiledClassWriter.visitMethod( asmCompiledClassWriter.visitMethod(
ACC_PUBLIC or ACC_FINAL or ACC_BRIDGE or ACC_SYNTHETIC, ACC_PUBLIC or ACC_FINAL or ACC_BRIDGE or ACC_SYNTHETIC,
"evaluate", "invoke",
"(L$MAP_CLASS;)L$OBJECT_CLASS;", "(L$MAP_CLASS;)L$OBJECT_CLASS;",
null, null,
null null
@ -151,7 +166,7 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
visitLabel(l0) visitLabel(l0)
visitVarInsn(ALOAD, 0) visitVarInsn(ALOAD, 0)
visitVarInsn(ALOAD, 1) visitVarInsn(ALOAD, 1)
visitMethodInsn(INVOKEVIRTUAL, slashesClassName, "evaluate", "(L$MAP_CLASS;)L$T_CLASS;", false) visitMethodInsn(INVOKEVIRTUAL, slashesClassName, "invoke", "(L$MAP_CLASS;)L$T_CLASS;", false)
visitInsn(ARETURN) visitInsn(ARETURN)
val l1 = Label() val l1 = Label()
visitLabel(l1) visitLabel(l1)
@ -171,31 +186,34 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
asmCompiledClassWriter.visitEnd() asmCompiledClassWriter.visitEnd()
return classLoader val new = classLoader
.defineClass(className, asmCompiledClassWriter.toByteArray()) .defineClass(className, asmCompiledClassWriter.toByteArray())
.constructors .constructors
.first() .first()
.newInstance(algebra, constants) as AsmCompiled<T> .newInstance(algebra, constants) as AsmCompiledExpression<T>
generatedInstance = new
return new
} }
fun visitLoadFromConstants(value: T) = visitLoadAnyFromConstants(value as Any, T_CLASS) internal fun visitLoadFromConstants(value: T) = visitLoadAnyFromConstants(value as Any, T_CLASS)
fun visitLoadAnyFromConstants(value: Any, type: String) { private fun visitLoadAnyFromConstants(value: Any, type: String) {
val idx = if (value in constants) constants.indexOf(value) else constants.apply { add(value) }.lastIndex val idx = if (value in constants) constants.indexOf(value) else constants.apply { add(value) }.lastIndex
maxStack++ maxStack++
evaluateMethodVisitor.run { invokeMethodVisitor.run {
visitLoadThis() visitLoadThis()
visitFieldInsn(GETFIELD, slashesClassName, "constants", "L$LIST_CLASS;") visitFieldInsn(GETFIELD, slashesClassName, "constants", "L$LIST_CLASS;")
visitLdcOrIConstInsn(idx) visitLdcOrIConstInsn(idx)
visitMethodInsn(INVOKEINTERFACE, LIST_CLASS, "get", "(I)L$OBJECT_CLASS;", true) visitMethodInsn(INVOKEINTERFACE, LIST_CLASS, "get", "(I)L$OBJECT_CLASS;", true)
evaluateMethodVisitor.visitTypeInsn(CHECKCAST, type) invokeMethodVisitor.visitTypeInsn(CHECKCAST, type)
} }
} }
private fun visitLoadThis(): Unit = evaluateMethodVisitor.visitVarInsn(ALOAD, evaluateThisVar) private fun visitLoadThis(): Unit = invokeMethodVisitor.visitVarInsn(ALOAD, invokeThisVar)
fun visitNumberConstant(value: Number) { internal fun visitNumberConstant(value: Number) {
maxStack++ maxStack++
val clazz = value.javaClass val clazz = value.javaClass
val c = clazz.name.replace('.', '/') val c = clazz.name.replace('.', '/')
@ -204,22 +222,22 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
if (sigLetter != null) { if (sigLetter != null) {
when (value) { when (value) {
is Int -> evaluateMethodVisitor.visitLdcOrIConstInsn(value) is Int -> invokeMethodVisitor.visitLdcOrIConstInsn(value)
is Double -> evaluateMethodVisitor.visitLdcOrDConstInsn(value) is Double -> invokeMethodVisitor.visitLdcOrDConstInsn(value)
is Float -> evaluateMethodVisitor.visitLdcOrFConstInsn(value) is Float -> invokeMethodVisitor.visitLdcOrFConstInsn(value)
else -> evaluateMethodVisitor.visitLdcInsn(value) else -> invokeMethodVisitor.visitLdcInsn(value)
} }
evaluateMethodVisitor.visitMethodInsn(INVOKESTATIC, c, "valueOf", "($sigLetter)L${c};", false) invokeMethodVisitor.visitMethodInsn(INVOKESTATIC, c, "valueOf", "($sigLetter)L${c};", false)
return return
} }
visitLoadAnyFromConstants(value, c) visitLoadAnyFromConstants(value, c)
} }
fun visitLoadFromVariables(name: String, defaultValue: T? = null) = evaluateMethodVisitor.run { internal fun visitLoadFromVariables(name: String, defaultValue: T? = null) = invokeMethodVisitor.run {
maxStack += 2 maxStack += 2
visitVarInsn(ALOAD, evaluateArgumentsVar) visitVarInsn(ALOAD, invokeArgumentsVar)
if (defaultValue != null) { if (defaultValue != null) {
visitLdcInsn(name) visitLdcInsn(name)
@ -242,26 +260,26 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
visitCastToT() visitCastToT()
} }
fun visitLoadAlgebra() { internal fun visitLoadAlgebra() {
evaluateMethodVisitor.visitVarInsn(ALOAD, evaluateThisVar) invokeMethodVisitor.visitVarInsn(ALOAD, invokeThisVar)
evaluateMethodVisitor.visitFieldInsn( invokeMethodVisitor.visitFieldInsn(
GETFIELD, GETFIELD,
ASM_COMPILED_CLASS, "algebra", "L$ALGEBRA_CLASS;" ASM_COMPILED_EXPRESSION_CLASS, "algebra", "L$ALGEBRA_CLASS;"
) )
evaluateMethodVisitor.visitTypeInsn(CHECKCAST, T_ALGEBRA_CLASS) invokeMethodVisitor.visitTypeInsn(CHECKCAST, T_ALGEBRA_CLASS)
} }
fun visitAlgebraOperation(owner: String, method: String, descriptor: String) { internal fun visitAlgebraOperation(owner: String, method: String, descriptor: String) {
maxStack++ maxStack++
evaluateMethodVisitor.visitMethodInsn(INVOKEINTERFACE, owner, method, descriptor, true) invokeMethodVisitor.visitMethodInsn(INVOKEINTERFACE, owner, method, descriptor, true)
visitCastToT() visitCastToT()
} }
private fun visitCastToT(): Unit = evaluateMethodVisitor.visitTypeInsn(CHECKCAST, T_CLASS) private fun visitCastToT(): Unit = invokeMethodVisitor.visitTypeInsn(CHECKCAST, T_CLASS)
companion object { internal companion object {
private val SIGNATURE_LETTERS = mapOf( private val SIGNATURE_LETTERS = mapOf(
java.lang.Byte::class.java to "B", java.lang.Byte::class.java to "B",
java.lang.Short::class.java to "S", java.lang.Short::class.java to "S",
@ -271,16 +289,16 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
java.lang.Double::class.java to "D" java.lang.Double::class.java to "D"
) )
const val ASM_COMPILED_CLASS = "scientifik/kmath/expressions/AsmCompiled" internal const val ASM_COMPILED_EXPRESSION_CLASS = "scientifik/kmath/expressions/AsmCompiledExpression"
const val LIST_CLASS = "java/util/List" internal const val LIST_CLASS = "java/util/List"
const val MAP_CLASS = "java/util/Map" internal const val MAP_CLASS = "java/util/Map"
const val OBJECT_CLASS = "java/lang/Object" internal const val OBJECT_CLASS = "java/lang/Object"
const val ALGEBRA_CLASS = "scientifik/kmath/operations/Algebra" internal const val ALGEBRA_CLASS = "scientifik/kmath/operations/Algebra"
const val SPACE_OPERATIONS_CLASS = "scientifik/kmath/operations/SpaceOperations" internal const val SPACE_OPERATIONS_CLASS = "scientifik/kmath/operations/SpaceOperations"
const val STRING_CLASS = "java/lang/String" internal const val STRING_CLASS = "java/lang/String"
const val FIELD_OPERATIONS_CLASS = "scientifik/kmath/operations/FieldOperations" internal const val FIELD_OPERATIONS_CLASS = "scientifik/kmath/operations/FieldOperations"
const val RING_OPERATIONS_CLASS = "scientifik/kmath/operations/RingOperations" internal const val RING_OPERATIONS_CLASS = "scientifik/kmath/operations/RingOperations"
const val NUMBER_CLASS = "java/lang/Number" internal const val NUMBER_CLASS = "java/lang/Number"
} }
} }
@ -366,43 +384,25 @@ internal class AsmDivExpression<T>(
} }
} }
open class AsmFunctionalExpressionSpace<T>( open class AsmExpressionSpace<T>(space: Space<T>) : Space<AsmExpression<T>>,
val space: Space<T>,
one: T
) : Space<AsmExpression<T>>,
ExpressionSpace<T, AsmExpression<T>> { ExpressionSpace<T, AsmExpression<T>> {
override val zero: AsmExpression<T> = override val zero: AsmExpression<T> = AsmConstantExpression(space.zero)
AsmConstantExpression(space.zero) override fun const(value: T): AsmExpression<T> = AsmConstantExpression(value)
override fun variable(name: String, default: T?): AsmExpression<T> = AsmVariableExpression(name, default)
override fun const(value: T): AsmExpression<T> = override fun add(a: AsmExpression<T>, b: AsmExpression<T>): AsmExpression<T> = AsmSumExpression(a, b)
AsmConstantExpression(value) override fun multiply(a: AsmExpression<T>, k: Number): AsmExpression<T> = AsmConstProductExpression(a, k)
override fun variable(name: String, default: T?): AsmExpression<T> =
AsmVariableExpression(
name,
default
)
override fun add(a: AsmExpression<T>, b: AsmExpression<T>): AsmExpression<T> =
AsmSumExpression(a, b)
override fun multiply(a: AsmExpression<T>, k: Number): AsmExpression<T> =
AsmConstProductExpression(a, k)
operator fun AsmExpression<T>.plus(arg: T) = this + const(arg) operator fun AsmExpression<T>.plus(arg: T) = this + const(arg)
operator fun AsmExpression<T>.minus(arg: T) = this - const(arg) operator fun AsmExpression<T>.minus(arg: T) = this - const(arg)
operator fun T.plus(arg: AsmExpression<T>) = arg + this operator fun T.plus(arg: AsmExpression<T>) = arg + this
operator fun T.minus(arg: AsmExpression<T>) = arg - this operator fun T.minus(arg: AsmExpression<T>) = arg - this
} }
class AsmFunctionalExpressionField<T>(val field: Field<T>) : ExpressionField<T, AsmExpression<T>>, class AsmExpressionField<T>(private val field: Field<T>) : ExpressionField<T, AsmExpression<T>>,
AsmFunctionalExpressionSpace<T>(field, field.one) { AsmExpressionSpace<T>(field) {
override val one: AsmExpression<T> override val one: AsmExpression<T>
get() = const(this.field.one) get() = const(this.field.one)
override fun const(value: Double): AsmExpression<T> = const(field.run { one * value }) override fun number(value: Number): AsmExpression<T> = const(field.run { one * value })
override fun multiply(a: AsmExpression<T>, b: AsmExpression<T>): AsmExpression<T> = override fun multiply(a: AsmExpression<T>, b: AsmExpression<T>): AsmExpression<T> =
AsmProductExpression(a, b) AsmProductExpression(a, b)
@ -412,7 +412,6 @@ class AsmFunctionalExpressionField<T>(val field: Field<T>) : ExpressionField<T,
operator fun AsmExpression<T>.times(arg: T) = this * const(arg) operator fun AsmExpression<T>.times(arg: T) = this * const(arg)
operator fun AsmExpression<T>.div(arg: T) = this / const(arg) operator fun AsmExpression<T>.div(arg: T) = this / const(arg)
operator fun T.times(arg: AsmExpression<T>) = arg * this operator fun T.times(arg: AsmExpression<T>) = arg * this
operator fun T.div(arg: AsmExpression<T>) = arg / this operator fun T.div(arg: AsmExpression<T>) = arg / this
} }

25
kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt
View File

@ -12,15 +12,12 @@ class AsmTest {
arguments: Map<String, T>, arguments: Map<String, T>,
algebra: Algebra<T>, algebra: Algebra<T>,
clazz: Class<*> clazz: Class<*>
) { ): Unit = assertEquals(
assertEquals( expectedValue, AsmGenerationContext(clazz, algebra, "TestAsmCompiled")
expectedValue, AsmGenerationContext( .also(expr::invoke)
clazz, .generate()
algebra, .invoke(arguments)
"TestAsmCompiled" )
).also(expr::invoke).generate().evaluate(arguments)
)
}
@Suppress("UNCHECKED_CAST") @Suppress("UNCHECKED_CAST")
private fun testDoubleExpressionValue( private fun testDoubleExpressionValue(
@ -29,7 +26,7 @@ class AsmTest {
arguments: Map<String, Double>, arguments: Map<String, Double>,
algebra: Algebra<Double> = RealField, algebra: Algebra<Double> = RealField,
clazz: Class<Double> = java.lang.Double::class.java as Class<Double> clazz: Class<Double> = java.lang.Double::class.java as Class<Double>
) = testExpressionValue(expectedValue, expr, arguments, algebra, clazz) ): Unit = testExpressionValue(expectedValue, expr, arguments, algebra, clazz)
@Test @Test
fun testSum() = testDoubleExpressionValue( fun testSum() = testDoubleExpressionValue(
@ -39,28 +36,28 @@ class AsmTest {
) )
@Test @Test
fun testConst() = testDoubleExpressionValue( fun testConst(): Unit = testDoubleExpressionValue(
123.0, 123.0,
AsmConstantExpression(123.0), AsmConstantExpression(123.0),
mapOf() mapOf()
) )
@Test @Test
fun testDiv() = testDoubleExpressionValue( fun testDiv(): Unit = testDoubleExpressionValue(
0.5, 0.5,
AsmDivExpression(AsmConstantExpression(1.0), AsmConstantExpression(2.0)), AsmDivExpression(AsmConstantExpression(1.0), AsmConstantExpression(2.0)),
mapOf() mapOf()
) )
@Test @Test
fun testProduct() = testDoubleExpressionValue( fun testProduct(): Unit = testDoubleExpressionValue(
25.0, 25.0,
AsmProductExpression(AsmVariableExpression("x"), AsmVariableExpression("x")), AsmProductExpression(AsmVariableExpression("x"), AsmVariableExpression("x")),
mapOf("x" to 5.0) mapOf("x" to 5.0)
) )
@Test @Test
fun testCProduct() = testDoubleExpressionValue( fun testCProduct(): Unit = testDoubleExpressionValue(
25.0, 25.0,
AsmConstProductExpression(AsmVariableExpression("x"), 5.0), AsmConstProductExpression(AsmVariableExpression("x"), 5.0),
mapOf("x" to 5.0) mapOf("x" to 5.0)

2
kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/Expression.kt
View File

@ -76,7 +76,7 @@ interface ExpressionSpace<T, E> : Space<E>, ExpressionContext<T, E> {
} }
interface ExpressionField<T, E> : Field<E>, ExpressionSpace<T, E> { interface ExpressionField<T, E> : Field<E>, ExpressionSpace<T, E> {
fun const(value: Double): E = one.times(value) fun number(value: Number): E = one * value
override fun produce(node: SyntaxTreeNode): E { override fun produce(node: SyntaxTreeNode): E {
if (node is BinaryNode) { if (node is BinaryNode) {

44
kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/FunctionalExpressions.kt
View File

@ -27,55 +27,41 @@ internal class ProductExpression<T>(val context: Ring<T>, val first: Expression<
context.multiply(first.invoke(arguments), second.invoke(arguments)) context.multiply(first.invoke(arguments), second.invoke(arguments))
} }
internal class ConstProductExpession<T>(val context: Space<T>, val expr: Expression<T>, val const: Number) : internal class ConstProductExpression<T>(val context: Space<T>, val expr: Expression<T>, val const: Number) :
Expression<T> { Expression<T> {
override fun invoke(arguments: Map<String, T>): T = context.multiply(expr.invoke(arguments), const) override fun invoke(arguments: Map<String, T>): T = context.multiply(expr.invoke(arguments), const)
} }
internal class DivExpession<T>(val context: Field<T>, val expr: Expression<T>, val second: Expression<T>) : internal class DivExpression<T>(val context: Field<T>, val expr: Expression<T>, val second: Expression<T>) :
Expression<T> { Expression<T> {
override fun invoke(arguments: Map<String, T>): T = context.divide(expr.invoke(arguments), second.invoke(arguments)) override fun invoke(arguments: Map<String, T>): T = context.divide(expr.invoke(arguments), second.invoke(arguments))
} }
open class FunctionalExpressionSpace<T>( open class FunctionalExpressionSpace<T>(val space: Space<T>) : Space<Expression<T>>, ExpressionSpace<T, Expression<T>> {
val space: Space<T>,
one: T
) : Space<Expression<T>>, ExpressionSpace<T,Expression<T>> {
override val zero: Expression<T> = ConstantExpression(space.zero) override val zero: Expression<T> = ConstantExpression(space.zero)
override fun const(value: T): Expression<T> = ConstantExpression(value) override fun const(value: T): Expression<T> = ConstantExpression(value)
override fun variable(name: String, default: T?): Expression<T> = VariableExpression(name, default) override fun variable(name: String, default: T?): Expression<T> = VariableExpression(name, default)
override fun add(a: Expression<T>, b: Expression<T>): Expression<T> = SumExpression(space, a, b) override fun add(a: Expression<T>, b: Expression<T>): Expression<T> = SumExpression(space, a, b)
override fun multiply(a: Expression<T>, k: Number): Expression<T> = ConstProductExpression(space, a, k)
override fun multiply(a: Expression<T>, k: Number): Expression<T> = ConstProductExpession(space, a, k) operator fun Expression<T>.plus(arg: T): Expression<T> = this + const(arg)
operator fun Expression<T>.minus(arg: T): Expression<T> = this - const(arg)
operator fun T.plus(arg: Expression<T>): Expression<T> = arg + this
operator fun Expression<T>.plus(arg: T) = this + const(arg) operator fun T.minus(arg: Expression<T>): Expression<T> = arg - this
operator fun Expression<T>.minus(arg: T) = this - const(arg)
operator fun T.plus(arg: Expression<T>) = arg + this
operator fun T.minus(arg: Expression<T>) = arg - this
} }
open class FunctionalExpressionField<T>( open class FunctionalExpressionField<T>(
val field: Field<T> val field: Field<T>
) : ExpressionField<T,Expression<T>>, FunctionalExpressionSpace<T>(field, field.one) { ) : ExpressionField<T, Expression<T>>, FunctionalExpressionSpace<T>(field) {
override val one: Expression<T> override val one: Expression<T>
get() = const(this.field.one) get() = const(this.field.one)
override fun const(value: Double): Expression<T> = const(field.run { one*value}) override fun number(value: Number): Expression<T> = const(field.run { one * value })
override fun multiply(a: Expression<T>, b: Expression<T>): Expression<T> = ProductExpression(field, a, b) override fun multiply(a: Expression<T>, b: Expression<T>): Expression<T> = ProductExpression(field, a, b)
override fun divide(a: Expression<T>, b: Expression<T>): Expression<T> = DivExpression(field, a, b)
override fun divide(a: Expression<T>, b: Expression<T>): Expression<T> = DivExpession(field, a, b) operator fun Expression<T>.times(arg: T): Expression<T> = this * const(arg)
operator fun Expression<T>.div(arg: T): Expression<T> = this / const(arg)
operator fun Expression<T>.times(arg: T) = this * const(arg) operator fun T.times(arg: Expression<T>): Expression<T> = arg * this
operator fun Expression<T>.div(arg: T) = this / const(arg) operator fun T.div(arg: Expression<T>): Expression<T> = arg / this
operator fun T.times(arg: Expression<T>) = arg * this
operator fun T.div(arg: Expression<T>) = arg / this
} }