bit fields

src/main/kotlin/blitz/BitField.kt

@@ -0,0 +1,33 @@
+package blitz
+
+import blitz.collections.BitVec
+import kotlin.reflect.KProperty
+
+abstract class BitField {
+    private var vec = BitVec(1)
+
+    protected class BitDelegate(
+        private val thi: BitField,
+        private val pos: Int,
+    ) {
+        operator fun getValue(thisRef: Any?, property: KProperty<*>): Boolean =
+            thi.vec[pos]
+
+        operator fun setValue(thisRef: Any?, property: KProperty<*>, value: Boolean) {
+            thi.vec[pos] = value
+        }
+    }
+
+    protected fun bit(pos: Int): BitDelegate =
+        BitDelegate(this, pos)
+
+    fun decode(byte: Byte) {
+        vec = BitVec.from(byteArrayOf(byte))
+    }
+
+    fun encode(): Byte =
+        vec.toBytes()[0]
+
+    override fun toString(): String =
+        "${this::class.simpleName}(0b${vec.toBytes()[0].toString(2)})"
+}