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Fix and test

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This commit is contained in:
Alexander Nozik 2021-05-16 20:51:46 +03:00
parent 15d874fb06
commit 516444d1bc
5 changed files with 28 additions and 9 deletions
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6
kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MST.kt
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@ -76,7 +76,7 @@ public fun <T> Algebra<T>.evaluate(node: MST): T = when (node) {
}
}
internal class InnerAlgebra<T : Any>(val algebra: Algebra<T>, val arguments: Map<Symbol, T>) : NumericAlgebra<T> {
internal class InnerAlgebra<T>(val algebra: Algebra<T>, val arguments: Map<Symbol, T>) : NumericAlgebra<T> {
override fun bindSymbolOrNull(value: String): T? = algebra.bindSymbolOrNull(value) ?: arguments[StringSymbol(value)]
override fun unaryOperation(operation: String, arg: T): T =
@ -101,7 +101,7 @@ internal class InnerAlgebra<T : Any>(val algebra: Algebra<T>, val arguments: Map
/**
* Interprets the [MST] node with this [Algebra] and optional [arguments]
*/
public fun <T : Any> MST.interpret(algebra: Algebra<T>, arguments: Map<Symbol, T>): T =
public fun <T> MST.interpret(algebra: Algebra<T>, arguments: Map<Symbol, T>): T =
InnerAlgebra(algebra, arguments).evaluate(this)
/**
@ -111,7 +111,7 @@ public fun <T : Any> MST.interpret(algebra: Algebra<T>, arguments: Map<Symbol, T
* @param algebra the algebra that provides operations.
* @return the value of expression.
*/
public fun <T : Any> MST.interpret(algebra: Algebra<T>, vararg arguments: Pair<Symbol, T>): T =
public fun <T> MST.interpret(algebra: Algebra<T>, vararg arguments: Pair<Symbol, T>): T =
interpret(algebra, mapOf(*arguments))
/**

2
kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/Algebra.kt
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@ -84,7 +84,7 @@ public interface Algebra<T> {
* @return an operation.
*/
public fun binaryOperationFunction(operation: String): (left: T, right: T) -> T =
error("Binary operation $operation not defined in $this")
error("Binary operation '$operation; not defined in $this")
/**
* Dynamically invokes a binary operation with the certain name.

6
kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/LogicAlgebra.kt
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@ -27,12 +27,18 @@ public interface LogicAlgebra<T : Any> : Algebra<T> {
else -> super.unaryOperation(operation, arg)
}
override fun unaryOperationFunction(operation: String): (arg: T) -> T = { unaryOperation(operation, it) }
override fun binaryOperation(operation: String, left: T, right: T): T = when (operation) {
Boolean::and.name -> left.and(right)
Boolean::or.name -> left.or(right)
else -> super.binaryOperation(operation, left, right)
}
override fun binaryOperationFunction(operation: String): (left: T, right: T) -> T = { l, r ->
binaryOperation(operation, l, r)
}
/**
* Logic 'not'
*/

3
kmath-core/src/commonTest/kotlin/space/kscience/kmath/expressions/ExpressionFieldTest.kt
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@ -6,7 +6,6 @@
package space.kscience.kmath.expressions
import space.kscience.kmath.operations.DoubleField
import space.kscience.kmath.operations.invoke
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertFails
@ -16,7 +15,7 @@ class ExpressionFieldTest {
@Test
fun testExpression() {
val expression = FunctionalExpressionField(DoubleField).invoke {
val expression = with(FunctionalExpressionField(DoubleField)) {
val x by binding()
x * x + 2 * x + one
}

20
kmath-core/src/commonTest/kotlin/space/kscience/kmath/expressions/InterpretTest.kt
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@ -5,18 +5,32 @@
package space.kscience.kmath.expressions
import space.kscience.kmath.expressions.Symbol.Companion.x
import space.kscience.kmath.misc.UnstableKMathAPI
import space.kscience.kmath.operations.BooleanAlgebra
import space.kscience.kmath.operations.DoubleField
import space.kscience.kmath.operations.bindSymbol
import space.kscience.kmath.operations.invoke
import kotlin.test.Test
import kotlin.test.assertEquals
internal class InterpretTest {
@Test
fun interpretation() {
val expr = MstField {
val x = bindSymbol(Symbol.x)
x * 2.0 + number(2.0) / x - 16.0
}.toExpression(DoubleField)
expr(Symbol.x to 2.2)
assertEquals(-10.69, expr(x to 2.2), 0.02)
}
@Test
@UnstableKMathAPI
fun booleanAlgebra() {
val expr = MstLogicAlgebra {
x and const(true)
}.toExpression(BooleanAlgebra)
assertEquals(true, expr(x to true))
assertEquals(false, expr(x to false))
}
}