diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8cb88c7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,106 @@
+###OSX###
+
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must ends with two \r.
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear on external disk
+.Spotlight-V100
+.Trashes
+
+
+###Linux###
+
+*~
+
+# KDE directory preferences
+.directory
+
+
+###Android###
+
+# Built application files
+*.apk
+*.ap_
+
+# Files for ART and Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+
+# Gradle files
+.gradle/
+.gradletasknamecache
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Lint
+lint-report.html
+lint-report_files/
+lint_result.txt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.war
+*.ear
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+
+###IntelliJ###
+
+*.iml
+*.ipr
+*.iws
+.idea/
+
+
+###Eclipse###
+
+*.pydevproject
+.metadata
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+.settings/
+.loadpath
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# CDT-specific
+.cproject
+
+# PDT-specific
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# TeXlipse plugin
+.texlipse
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8bcf3f0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,39 @@
+CopyDynamic
+===========
+
+PoC prototype of generating `copyDynamic` extension functions for data classes, such that you can do this:
+
+```kotlin
+@CopyDynamic
+data class Foo(val bar: String = "bar", val baz: String = "baz", val fizz: String = "fizz")
+```
+
+And have a `copyDynamic` extension function generated to allow for dynamic setting of variables in a copy call.
+
+```kotlin
+val foo = Foo()
+
+val newFoo = foo.copyDynamic {
+  bar = "newBar"
+  if (someCondition) baz = "newBaz"
+}
+```
+
+
+
+License
+-------
+
+    Copyright (C) 2018 Zac Sweers
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..acfcfb0
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+allprojects {
+  buildscript {
+    repositories {
+      mavenCentral()
+    }
+  }
+  repositories {
+    mavenCentral()
+  }
+}
diff --git a/copydynamic-annotations/build.gradle b/copydynamic-annotations/build.gradle
new file mode 100644
index 0000000..d47d13e
--- /dev/null
+++ b/copydynamic-annotations/build.gradle
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+buildscript {
+  ext.kotlin_version = '1.2.41'
+  dependencies {
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+  }
+}
+
+group 'com.example'
+version '1.0-SNAPSHOT'
+
+apply plugin: 'org.jetbrains.kotlin.jvm'
+
+repositories {
+  mavenCentral()
+}
+
+dependencies {
+  compile "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
+
+compileKotlin {
+  kotlinOptions {
+    freeCompilerArgs = ['-Xjsr305=strict']
+  }
+}
diff --git a/copydynamic-annotations/src/main/kotlin/io/sweers/copydynamic/annotations/CopyDynamic.kt b/copydynamic-annotations/src/main/kotlin/io/sweers/copydynamic/annotations/CopyDynamic.kt
new file mode 100644
index 0000000..5fa0e36
--- /dev/null
+++ b/copydynamic-annotations/src/main/kotlin/io/sweers/copydynamic/annotations/CopyDynamic.kt
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.sweers.copydynamic.annotations
+
+import kotlin.annotation.AnnotationRetention.BINARY
+import kotlin.annotation.AnnotationTarget.CLASS
+import kotlin.annotation.AnnotationTarget.TYPE
+
+@Target(TYPE, CLASS)
+@Retention(BINARY)
+annotation class CopyDynamic
diff --git a/copydynamic/build.gradle b/copydynamic/build.gradle
new file mode 100644
index 0000000..ebdd580
--- /dev/null
+++ b/copydynamic/build.gradle
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+buildscript {
+  ext.kotlin_version = '1.2.41'
+  dependencies {
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+  }
+}
+
+apply plugin: 'org.jetbrains.kotlin.jvm'
+apply plugin: 'org.jetbrains.kotlin.kapt'
+
+repositories {
+  mavenCentral()
+  maven {
+    url "https://kotlin.bintray.com/kotlinx"
+  }
+}
+
+dependencies {
+  kapt "com.google.auto.service:auto-service:1.0-rc4"
+  compileOnly "com.google.auto.service:auto-service:1.0-rc4"
+
+  compile project(':copydynamic-annotations')
+
+  compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+  compile 'com.squareup:kotlinpoet:0.7.0'
+  compile 'org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.0.2'
+}
+
+compileKotlin {
+  kotlinOptions {
+    jvmTarget = "1.8"
+    freeCompilerArgs = ['-Xjsr305=strict']
+  }
+}
diff --git a/copydynamic/src/main/kotlin/io/sweers/copydynamic/CopyDynamicProcessor.kt b/copydynamic/src/main/kotlin/io/sweers/copydynamic/CopyDynamicProcessor.kt
new file mode 100644
index 0000000..04fee70
--- /dev/null
+++ b/copydynamic/src/main/kotlin/io/sweers/copydynamic/CopyDynamicProcessor.kt
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.sweers.copydynamic
+
+import com.google.auto.common.MoreElements
+import com.google.auto.service.AutoService
+import com.squareup.kotlinpoet.ClassName
+import com.squareup.kotlinpoet.FileSpec
+import com.squareup.kotlinpoet.FunSpec
+import com.squareup.kotlinpoet.KModifier.PRIVATE
+import com.squareup.kotlinpoet.LambdaTypeName
+import com.squareup.kotlinpoet.ParameterSpec
+import com.squareup.kotlinpoet.PropertySpec
+import com.squareup.kotlinpoet.TypeSpec
+import com.squareup.kotlinpoet.UNIT
+import com.squareup.kotlinpoet.asClassName
+import io.sweers.copydynamic.annotations.CopyDynamic
+import kotlinx.metadata.impl.extensions.MetadataExtensions
+import kotlinx.metadata.jvm.KotlinClassMetadata.Class
+import java.io.File
+import java.util.ServiceLoader
+import javax.annotation.processing.AbstractProcessor
+import javax.annotation.processing.Filer
+import javax.annotation.processing.Messager
+import javax.annotation.processing.ProcessingEnvironment
+import javax.annotation.processing.Processor
+import javax.annotation.processing.RoundEnvironment
+import javax.lang.model.SourceVersion
+import javax.lang.model.element.TypeElement
+import javax.lang.model.util.Elements
+import javax.lang.model.util.Types
+
+@AutoService(Processor::class)
+class CopyDynamicProcessor : AbstractProcessor() {
+
+  private lateinit var filer: Filer
+  private lateinit var messager: Messager
+  private lateinit var elements: Elements
+  private lateinit var types: Types
+  private lateinit var options: Map<String, String>
+  private lateinit var outputDir: File
+
+  override fun init(processingEnv: ProcessingEnvironment) {
+    super.init(processingEnv)
+    filer = processingEnv.filer
+    messager = processingEnv.messager
+    elements = processingEnv.elementUtils
+    types = processingEnv.typeUtils
+    options = processingEnv.options
+    outputDir = options["kapt.kotlin.generated"]?.let(::File) ?: throw IllegalStateException(
+        "No kapt.kotlin.generated option provided")
+  }
+
+  override fun getSupportedSourceVersion(): SourceVersion {
+    return SourceVersion.latestSupported()
+  }
+
+  override fun getSupportedAnnotationTypes(): Set<String> {
+    return setOf(CopyDynamic::class.java.canonicalName)
+  }
+
+  override fun process(annotations: Set<TypeElement>,
+      roundEnv: RoundEnvironment): Boolean {
+
+    if (ServiceLoader.load(MetadataExtensions::class.java).toList().isEmpty()) {
+      throw RuntimeException("No metadata extensions found!")
+    }
+
+    roundEnv.getElementsAnnotatedWith(CopyDynamic::class.java)
+        .asSequence()
+        .map { it as TypeElement }
+        .associate {
+          it to ((it.readMetadata()?.readKotlinClassMetadata() as? Class)?.readClassData()
+              ?: throw IllegalArgumentException("$it is not a kotlin class!"))
+        }
+        .forEach(this::createType)
+
+    return true
+  }
+
+  private fun createType(element: TypeElement, classData: ClassData) {
+    val packageName = MoreElements.getPackage(element).toString()
+    val builderName = "${element.simpleName}Builder"
+    val sourceType = element.asClassName()
+    val sourceParam = ParameterSpec.builder("source", sourceType).build()
+    val properties = mutableListOf<Pair<PropertyData, PropertySpec>>()
+    val builderSpec = TypeSpec.classBuilder(builderName)
+        .primaryConstructor(FunSpec.constructorBuilder()
+            .addModifiers(PRIVATE)
+            .addParameter(sourceParam)
+            .build())
+        .addProperty(PropertySpec.builder(sourceParam.name, sourceType)
+            .addModifiers(PRIVATE)
+            .initializer("%N", sourceParam)
+            .build())
+        .apply {
+          classData.properties.forEach { property ->
+            addProperty(PropertySpec.varBuilder(property.name, property.type)
+                .initializer("%N.%L", sourceParam, property.name)
+                .build()
+                .also { properties.add(property to it) }
+            )
+          }
+        }
+        .addFunction(FunSpec.builder("build")
+            .addModifiers(PRIVATE)
+            .returns(sourceType)
+            .addStatement(
+                "return %N.copy(${properties.joinToString(", ") { "${it.first.name} = %N" }})",
+                sourceParam,
+                *(properties.map { it.second }.toTypedArray()))
+            .build())
+        .build()
+
+    // Generate the extension fun
+    val builderSpecKind = ClassName(packageName, builderName)
+    val copyBlockParam = ParameterSpec.builder("copyBlock",
+        LambdaTypeName.get(receiver = builderSpecKind,
+            parameters = emptyList(),
+            returnType = UNIT
+        )).build()
+    val extensionFun = FunSpec.builder("copyDynamic")
+        .receiver(sourceType)
+        .returns(sourceType)
+        .addParameter(copyBlockParam)
+        .addStatement("return %T(this).also { %N(it) }.build()", builderSpecKind, copyBlockParam)
+        .build()
+
+    FileSpec.builder(packageName, builderName)
+        .addType(builderSpec)
+        .addFunction(extensionFun)
+        .build()
+        .writeTo(outputDir)
+  }
+}
diff --git a/copydynamic/src/main/kotlin/io/sweers/copydynamic/kotlintypes.kt b/copydynamic/src/main/kotlin/io/sweers/copydynamic/kotlintypes.kt
new file mode 100644
index 0000000..e1dc25b
--- /dev/null
+++ b/copydynamic/src/main/kotlin/io/sweers/copydynamic/kotlintypes.kt
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.sweers.copydynamic
+
+import com.squareup.kotlinpoet.ClassName
+import com.squareup.kotlinpoet.ParameterizedTypeName
+import com.squareup.kotlinpoet.TypeName
+
+internal fun TypeName.rawType(): ClassName {
+  return when (this) {
+    is ClassName -> this
+    is ParameterizedTypeName -> rawType
+    else -> throw IllegalArgumentException("Cannot get raw type from $this")
+  }
+}
+
+internal fun TypeName.asNullableIf(condition: Boolean): TypeName {
+  return if (condition) asNullable() else this
+}
diff --git a/copydynamic/src/main/kotlin/io/sweers/copydynamic/metadata.kt b/copydynamic/src/main/kotlin/io/sweers/copydynamic/metadata.kt
new file mode 100644
index 0000000..34501ca
--- /dev/null
+++ b/copydynamic/src/main/kotlin/io/sweers/copydynamic/metadata.kt
@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.sweers.copydynamic
+
+import com.squareup.kotlinpoet.ANY
+import com.squareup.kotlinpoet.ClassName
+import com.squareup.kotlinpoet.KModifier
+import com.squareup.kotlinpoet.TypeName
+import com.squareup.kotlinpoet.TypeVariableName
+import com.squareup.kotlinpoet.WildcardTypeName
+import kotlinx.metadata.Flag
+import kotlinx.metadata.Flags
+import kotlinx.metadata.KmClassVisitor
+import kotlinx.metadata.KmConstructorVisitor
+import kotlinx.metadata.KmPropertyVisitor
+import kotlinx.metadata.KmTypeParameterVisitor
+import kotlinx.metadata.KmTypeVisitor
+import kotlinx.metadata.KmValueParameterVisitor
+import kotlinx.metadata.KmVariance
+import kotlinx.metadata.jvm.KotlinClassHeader
+import kotlinx.metadata.jvm.KotlinClassMetadata
+import javax.lang.model.element.Element
+import javax.lang.model.element.ExecutableElement
+
+@Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+internal fun Element.readMetadata(): KotlinClassHeader? {
+  return getAnnotation(Metadata::class.java)?.run {
+    KotlinClassHeader(k, mv, bv, d1, d2, xs, pn, xi)
+  }
+}
+
+internal fun KotlinClassHeader.readKotlinClassMetadata(): KotlinClassMetadata? {
+  return KotlinClassMetadata.read(this)
+}
+
+internal fun KmVariance.asKModifier(): KModifier? {
+  return when (this) {
+    KmVariance.IN -> KModifier.IN
+    KmVariance.OUT -> KModifier.OUT
+    KmVariance.INVARIANT -> null
+  }
+}
+
+/**
+ * Resolves the TypeName of this type as it would be seen in the source code, including nullability
+ * and generic type parameters.
+ *
+ * @param flags the [Flags] associated with this type
+ * @param [getTypeParameter] a function that returns the type parameter for the given index. **Only
+ *     called if [TypeNameKmTypeVisitor.visitTypeParameter] is called**
+ * @param useTypeAlias indicates whether or not to use type aliases or resolve their underlying
+ *     types
+ */
+internal class TypeNameKmTypeVisitor(flags: Flags,
+    private val getTypeParameter: ((index: Int) -> TypeName)? = null,
+    private val useTypeAlias: Boolean = true,
+    private val receiver: (TypeName) -> Unit) : KmTypeVisitor() {
+
+  private val nullable = Flag.Type.IS_NULLABLE(flags)
+  private var className: String? = null
+  private var typeAliasName: String? = null
+  private var typeAliasType: TypeName? = null
+  private var flexibleTypeUpperBound: TypeName? = null
+  private var outerType: TypeName? = null
+  private var typeParameter: TypeName? = null
+  private val argumentList = mutableListOf<TypeName>()
+
+  override fun visitAbbreviatedType(flags: Flags): KmTypeVisitor? {
+    if (!useTypeAlias) {
+      return null
+    }
+    return TypeNameKmTypeVisitor(flags, getTypeParameter, useTypeAlias) {
+      typeAliasType = it
+    }
+  }
+
+  override fun visitArgument(flags: Flags, variance: KmVariance): KmTypeVisitor? {
+    return TypeNameKmTypeVisitor(flags, getTypeParameter, useTypeAlias) {
+      argumentList.add(
+          when (variance) {
+            KmVariance.IN -> WildcardTypeName.supertypeOf(it)
+            KmVariance.OUT -> WildcardTypeName.subtypeOf(it)
+            KmVariance.INVARIANT -> it
+          }
+      )
+    }
+  }
+
+  override fun visitClass(name: kotlinx.metadata.ClassName) {
+    className = name
+  }
+
+  override fun visitFlexibleTypeUpperBound(flags: Flags,
+      typeFlexibilityId: String?): KmTypeVisitor? {
+    return TypeNameKmTypeVisitor(flags, getTypeParameter, useTypeAlias) {
+      flexibleTypeUpperBound = WildcardTypeName.subtypeOf(it)
+    }
+  }
+
+  override fun visitOuterType(flags: Flags): KmTypeVisitor? {
+    return TypeNameKmTypeVisitor(flags, getTypeParameter, useTypeAlias) {
+      outerType = WildcardTypeName.supertypeOf(it)
+    }
+  }
+
+  override fun visitStarProjection() {
+    argumentList.add(WildcardTypeName.subtypeOf(ANY))
+  }
+
+  override fun visitTypeAlias(name: kotlinx.metadata.ClassName) {
+    if (!useTypeAlias) {
+      return
+    }
+    typeAliasName = name
+  }
+
+  override fun visitTypeParameter(id: Int) {
+    typeParameter = getTypeParameter?.invoke(id) ?: throw IllegalStateException(
+        "Visiting TypeParameter when there are no type parameters!")
+  }
+
+  override fun visitEnd() {
+    var finalType = flexibleTypeUpperBound ?: outerType ?: typeParameter
+    if (finalType == null) {
+      if (useTypeAlias) {
+        finalType = typeAliasName?.let { ClassName.bestGuess(it.replace("/", ".")) }
+      }
+      if (finalType == null) {
+        finalType = typeAliasType ?: className?.let { ClassName.bestGuess(it.replace("/", ".")) }
+            ?: throw IllegalStateException("No valid typename found!")
+      }
+    }
+
+    finalType = finalType.asNullableIf(nullable)
+    receiver(finalType)
+  }
+}
+
+internal fun KotlinClassMetadata.Class.readClassData(): ClassData {
+  @Suppress("RedundantExplicitType")
+  var classFlags: Flags = 0
+  lateinit var className: String
+  var constructorData: ConstructorData? = null
+  var companionObjectName: String? = null
+  val typeParameters = LinkedHashMap<Int, TypeVariableName>()
+  val typeParamResolver = { id: Int -> typeParameters[id]!! }
+  val superTypes = mutableListOf<TypeName>()
+  val properties = mutableListOf<PropertyData>()
+  accept(object : KmClassVisitor() {
+    override fun visit(flags: Flags, name: kotlinx.metadata.ClassName) {
+      super.visit(flags, name)
+      className = name
+      classFlags = flags
+    }
+
+    override fun visitTypeParameter(flags: Flags,
+        name: String,
+        id: Int,
+        variance: KmVariance): KmTypeParameterVisitor? {
+      return object : KmTypeParameterVisitor() {
+        val upperBoundList = mutableListOf<TypeName>()
+        override fun visitUpperBound(flags: Flags): KmTypeVisitor? {
+          return TypeNameKmTypeVisitor(flags) {
+            upperBoundList += it
+          }
+        }
+
+        override fun visitEnd() {
+          typeParameters[id] = TypeVariableName(
+              name = name,
+              bounds = *(upperBoundList.toTypedArray()),
+              variance = variance.asKModifier().let {
+                if (it == KModifier.OUT) {
+                  // We don't redeclare out variance here
+                  null
+                } else {
+                  it
+                }
+              }
+          )
+              .reified(Flag.TypeParameter.IS_REIFIED(flags))
+        }
+      }
+    }
+
+    override fun visitCompanionObject(name: String) {
+      companionObjectName = name
+    }
+
+    override fun visitConstructor(flags: Flags): KmConstructorVisitor? {
+      return if (Flag.Constructor.IS_PRIMARY(flags)) {
+        object : KmConstructorVisitor() {
+          val params = mutableListOf<ParameterData>()
+          override fun visitValueParameter(flags: Flags, name: String): KmValueParameterVisitor? {
+            return object : KmValueParameterVisitor() {
+              override fun visitType(flags: Flags): KmTypeVisitor? {
+                return TypeNameKmTypeVisitor(flags, typeParamResolver) {
+                  params += ParameterData(flags, name, it)
+                }
+              }
+
+              override fun visitVarargElementType(flags: Flags): KmTypeVisitor? {
+                return TypeNameKmTypeVisitor(flags, typeParamResolver) {
+                  params += ParameterData(flags, name, it, true)
+                }
+              }
+            }
+          }
+
+          override fun visitEnd() {
+            constructorData = ConstructorData(flags, params)
+          }
+        }
+      } else {
+        null
+      }
+    }
+
+    override fun visitSupertype(flags: Flags): KmTypeVisitor? {
+      return TypeNameKmTypeVisitor(flags, typeParamResolver) {
+        superTypes += it
+      }
+    }
+
+    override fun visitProperty(flags: Flags,
+        name: String,
+        getterFlags: Flags,
+        setterFlags: Flags): KmPropertyVisitor? {
+      return object : KmPropertyVisitor() {
+        lateinit var type: TypeName
+        override fun visitEnd() {
+          properties += PropertyData(flags, name, type)
+        }
+
+        override fun visitReturnType(flags: Flags): KmTypeVisitor? {
+          return TypeNameKmTypeVisitor(flags, typeParamResolver) {
+            type = it
+          }
+        }
+      }
+    }
+  })
+
+  return ClassData(className.replace("/", "."),
+      classFlags,
+      companionObjectName,
+      constructorData,
+      superTypes,
+      typeParameters.values.toList(),
+      properties)
+}
+
+internal data class ClassData(
+    val name: String,
+    val flags: Flags,
+    val companionObjectName: String?,
+    val constructorData: ConstructorData?,
+    val superTypes: MutableList<TypeName>,
+    val typeVariables: List<TypeVariableName>,
+    val properties: List<PropertyData>
+) {
+  fun getPropertyOrNull(methodElement: ExecutableElement): PropertyData? {
+    return methodElement.simpleName.toString()
+        .takeIf { it.endsWith(kotlinPropertyAnnotationsFunPostfix) }
+        ?.substringBefore(kotlinPropertyAnnotationsFunPostfix)
+        ?.let { propertyName -> properties.firstOrNull { propertyName == it.name } }
+  }
+
+  companion object {
+    /**
+     * Postfix of the method name containing the [kotlin.Metadata] annotation for the relative property.
+     * @see [getPropertyOrNull]
+     */
+    const val kotlinPropertyAnnotationsFunPostfix = "\$annotations"
+  }
+}
+
+internal data class ConstructorData(
+    val flags: Flags,
+    val parameters: List<ParameterData>
+)
+
+internal data class ParameterData(
+    val flags: Flags,
+    val name: String,
+    val type: TypeName,
+    val isVarArg: Boolean = false
+) {
+  val declaresDefaultValue = Flag.ValueParameter.DECLARES_DEFAULT_VALUE(flags)
+}
+
+internal data class PropertyData(
+    val flags: Flags,
+    val name: String,
+    val type: TypeName
+) {
+  val hasSetter = Flag.Property.HAS_SETTER(flags)
+}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..01b8bf6
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..c483221
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,22 @@
+#
+# Copyright (c) 2018 Zac Sweers
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+#Wed Jun 06 23:25:02 PDT 2018
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.8-all.zip
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..cccdd3d
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..f955316
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/sample/build.gradle b/sample/build.gradle
new file mode 100644
index 0000000..f4bbfef
--- /dev/null
+++ b/sample/build.gradle
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+buildscript {
+  ext.kotlin_version = '1.2.41'
+  dependencies {
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+  }
+}
+
+apply plugin: 'org.jetbrains.kotlin.jvm'
+apply plugin: 'org.jetbrains.kotlin.kapt'
+
+repositories {
+  mavenCentral()
+  maven {
+    url "https://kotlin.bintray.com/kotlinx"
+  }
+}
+
+dependencies {
+  kapt project(':copydynamic')
+  compile project(':copydynamic-annotations')
+
+  compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+}
+
+compileKotlin {
+  kotlinOptions {
+    jvmTarget = "1.8"
+    freeCompilerArgs = ['-Xjsr305=strict']
+  }
+}
diff --git a/sample/src/main/kotlin/io/sweers/copydynamic/sample/Foo.kt b/sample/src/main/kotlin/io/sweers/copydynamic/sample/Foo.kt
new file mode 100644
index 0000000..4fecd04
--- /dev/null
+++ b/sample/src/main/kotlin/io/sweers/copydynamic/sample/Foo.kt
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.sweers.copydynamic.sample
+
+import io.sweers.copydynamic.annotations.CopyDynamic
+
+@CopyDynamic
+data class Foo(val bar: String = "bar", val baz: String = "baz", val fizz: String = "fizz")
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..121d5ed
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2018 Zac Sweers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+rootProject.name = 'copydynamic-root'
+include 'copydynamic'
+include 'copydynamic-annotations'
+include 'sample'