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Feature/diff api #154

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altavir merged 20 commits from feature/diff-api into dev 2020-10-28 13:25:24 +03:00
Conversation 0 Commits 20 Files Changed 52 +11 -7
1 changed files with 11 additions and 7 deletions
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kmath-core/src/commonMain/kotlin/kscience/kmath/expressions/Expression.kt
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@ -3,7 +3,6 @@ package kscience.kmath.expressions
import kscience.kmath.operations.Algebra import kscience.kmath.operations.Algebra
import kotlin.jvm.JvmName import kotlin.jvm.JvmName
import kotlin.properties.ReadOnlyProperty import kotlin.properties.ReadOnlyProperty
import kotlin.reflect.KProperty
/** /**
* A marker interface for a symbol. A symbol mus have an identity * A marker interface for a symbol. A symbol mus have an identity
@ -85,11 +84,16 @@ public interface ExpressionAlgebra<in T, E> : Algebra<E> {
public fun <T, E> ExpressionAlgebra<T, E>.bind(symbol: Symbol): E = public fun <T, E> ExpressionAlgebra<T, E>.bind(symbol: Symbol): E =
bindOrNull(symbol) ?: error("Symbol $symbol could not be bound to $this") bindOrNull(symbol) ?: error("Symbol $symbol could not be bound to $this")
public val symbol: ReadOnlyProperty<Any?, StringSymbol> = object : ReadOnlyProperty<Any?, StringSymbol> { /**
override fun getValue(thisRef: Any?, property: KProperty<*>): StringSymbol = StringSymbol(property.name) * A delegate to create a symbol with a string identity in this scope
*/
public val symbol: ReadOnlyProperty<Any?, StringSymbol> = ReadOnlyProperty { thisRef, property ->
StringSymbol(property.name)
} }
public fun <T, E> ExpressionAlgebra<T, E>.binding(): ReadOnlyProperty<Any?, E> = /**
ReadOnlyProperty { _, property -> * Bind a symbol by name inside the [ExpressionAlgebra]
*/
public fun <T, E> ExpressionAlgebra<T, E>.binding(): ReadOnlyProperty<Any?, E> = ReadOnlyProperty { _, property ->
bind(StringSymbol(property.name)) ?: error("A variable with name ${property.name} does not exist") bind(StringSymbol(property.name)) ?: error("A variable with name ${property.name} does not exist")
} }