feat: add getValue & setValue for PatchOption

src/main/kotlin/app/revanced/patcher/patch/PatchOption.kt

@@ -1,11 +1,14 @@
-@file:Suppress("CanBeParameter", "MemberVisibilityCanBePrivate")
+@file:Suppress("CanBeParameter", "MemberVisibilityCanBePrivate", "UNCHECKED_CAST")
 
 package app.revanced.patcher.patch
 
+import kotlin.reflect.KProperty
+
 class NoSuchOptionException(val option: String) : Exception("No such option: $option")
 class IllegalValueException(val value: Any?) : Exception("Illegal value: $value")
 class InvalidTypeException(val got: String, val expected: String) :
     Exception("Invalid option value type: $got, expected $expected")
+
 class RequirementNotMetException : Exception("null was passed into an option that requires a value")
 
 /**
@@ -82,6 +85,24 @@ sealed class PatchOption<T>(
             field = value
         }
 
+    /**
+     * Gets the value of the option.
+     * Please note that using the wrong value type results in a runtime error.
+     */
+    operator fun <T> getValue(thisRef: Nothing?, property: KProperty<*>) = value as T
+
+    /**
+     * Gets the value of the option.
+     * Please note that using the wrong value type results in a runtime error.
+     */
+    inline operator fun <reified V> setValue(thisRef: Any?, property: KProperty<*>, new: V) {
+        if (value !is V) throw InvalidTypeException(
+            V::class.java.canonicalName,
+            value?.let { it::class.java.canonicalName } ?: "null"
+        )
+        value = new as T
+    }
+
     /**
      * A [PatchOption] representing a [String].
      * @see PatchOption

src/test/kotlin/app/revanced/patcher/patch/PatchOptionsTest.kt

@@ -3,6 +3,7 @@ package app.revanced.patcher.patch
 import app.revanced.patcher.usage.bytecode.ExampleBytecodePatch
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.assertThrows
+import kotlin.test.assertNotEquals
 
 internal class PatchOptionsTest {
     private val options = ExampleBytecodePatch().options
@@ -31,9 +32,18 @@ internal class PatchOptionsTest {
                 }
             }
         }
-        println(options["key1"].value)
+        val option = options["key1"]
+        println(option.value)
         options["key1"] = "Hello, world!"
-        println(options["key1"].value)
+        println(option.value)
+    }
+
+    @Test
+    fun `should return a different value when changed`() {
+        var value: String by options["key1"]
+        val current = value + "" // force a copy
+        value = "Hello, world!"
+        assertNotEquals(current, value)
     }
 
     @Test