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Fix did not work, rolled back.

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This commit is contained in:
Alexander Nozik 2020-10-28 10:07:50 +03:00
parent 73b4294122
commit e5751c4cdc
1 changed files with 11 additions and 7 deletions
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16
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 kotlin.jvm.JvmName
import kotlin.properties.ReadOnlyProperty
import kotlin.reflect.KProperty
/**
* 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 =
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")
}
}