Fixed config delegates

dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/ConfigDelegates.kt

@@ -0,0 +1,42 @@
+package hep.dataforge.meta
+
+import hep.dataforge.values.Null
+import hep.dataforge.values.Value
+import kotlin.jvm.JvmName
+
+
+//Configurable delegates
+
+/**
+ * A property delegate that uses custom key
+ */
+fun Configurable.value(default: Value = Null, key: String? = null) =
+    ValueConfigDelegate(config, key, default)
+
+fun Configurable.string(default: String? = null, key: String? = null) =
+    StringConfigDelegate(config, key, default)
+
+fun Configurable.boolean(default: Boolean? = null, key: String? = null) =
+    BooleanConfigDelegate(config, key, default)
+
+fun Configurable.number(default: Number? = null, key: String? = null) =
+    NumberConfigDelegate(config, key, default)
+
+fun Configurable.child(key: String? = null) = MetaNodeDelegate(config, key)
+
+//fun <T : Configurable> Configurable.spec(spec: Specification<T>, key: String? = null) = ChildConfigDelegate<T>(key) { spec.wrap(this) }
+
+@JvmName("safeString")
+fun Configurable.string(default: String, key: String? = null) =
+    SafeStringConfigDelegate(config, key, default)
+
+@JvmName("safeBoolean")
+fun Configurable.boolean(default: Boolean, key: String? = null) =
+    SafeBooleanConfigDelegate(config, key, default)
+
+@JvmName("safeNumber")
+fun Configurable.number(default: Number, key: String? = null) =
+    SafeNumberConfigDelegate(config, key, default)
+
+inline fun <reified E : Enum<E>> Configurable.enum(default: E, key: String? = null) =
+    SafeEnumvConfigDelegate(config, key, default) { enumValueOf(it) }