[stdlib] Merge js-ir specific sources into common js sources

libraries/stdlib/js/runtime/reflectRuntime.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.js
+
+import kotlin.reflect.KProperty
+
+internal fun getPropertyCallableRef(
+    name: String,
+    paramCount: Int,
+    superType: dynamic,
+    getter: dynamic,
+    setter: dynamic
+): KProperty<*> {
+    getter.get = getter
+    getter.set = setter
+    getter.callableName = name
+    return getPropertyRefClass(
+        getter,
+        getKPropMetadata(paramCount, setter),
+        getInterfaceMaskFor(getter, superType)
+    ).unsafeCast<KProperty<*>>()
+}
+
+internal fun getLocalDelegateReference(name: String, superType: dynamic, mutable: Boolean, lambda: dynamic): KProperty<*> {
+    return getPropertyCallableRef(name, 0, superType, lambda, if (mutable) lambda else null)
+}
+
+private fun getPropertyRefClass(obj: Ctor, metadata: Metadata, imask: BitMask): dynamic {
+    obj.`$metadata$` = metadata
+    obj.constructor = obj
+    obj.`$imask$` = imask
+    return obj;
+}
+
+private fun getInterfaceMaskFor(obj: Ctor, superType: dynamic): BitMask =
+    obj.`$imask$` ?: implement(arrayOf(superType))
+
+@Suppress("UNUSED_PARAMETER")
+private fun getKPropMetadata(paramCount: Int, setter: Any?): dynamic {
+    return propertyRefClassMetadataCache[paramCount][if (setter == null) 0 else 1]
+}
+
+private fun metadataObject(): Metadata {
+    return classMeta(VOID, VOID, VOID, VOID, VOID)
+}
+
+private val propertyRefClassMetadataCache: Array<Array<dynamic>> = arrayOf<Array<dynamic>>(
+    //                 immutable     ,     mutable
+    arrayOf<dynamic>(metadataObject(), metadataObject()), // 0
+    arrayOf<dynamic>(metadataObject(), metadataObject()), // 1
+    arrayOf<dynamic>(metadataObject(), metadataObject())  // 2
+)
+