From 6fc7c3495ae15d258f929624f00c5803fcdceddc Mon Sep 17 00:00:00 2001
From: Ilya Matveev <ilya.matveev@jetbrains.com>
Date: Wed, 12 Apr 2017 18:17:10 +0700
Subject: [PATCH] stdlib: Add List and MutableList functions

---
 .../kotlin/kotlin/collections/Collections.kt  | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/runtime/src/main/kotlin/kotlin/collections/Collections.kt b/runtime/src/main/kotlin/kotlin/collections/Collections.kt
index 8369e854f9e..d2e3835e7f6 100644
--- a/runtime/src/main/kotlin/kotlin/collections/Collections.kt
+++ b/runtime/src/main/kotlin/kotlin/collections/Collections.kt
@@ -97,6 +97,26 @@ public fun <T : Any> listOfNotNull(element: T?): List<T> =
 /** Returns a new read-only list only of those given elements, that are not null. */
 public fun <T : Any> listOfNotNull(vararg elements: T?): List<T> = elements.filterNotNull()
 
+/**
+ * Creates a new read-only list with the specified [size], where each element is calculated by calling the specified
+ * [init] function. The [init] function returns a list element given its index.
+ */
+@SinceKotlin("1.1")
+@kotlin.internal.InlineOnly
+public inline fun <T> List(size: Int, init: (index: Int) -> T): List<T> = MutableList(size, init)
+
+/**
+ * Creates a new mutable list with the specified [size], where each element is calculated by calling the specified
+ * [init] function. The [init] function returns a list element given its index.
+ */
+@SinceKotlin("1.1")
+@kotlin.internal.InlineOnly
+public inline fun <T> MutableList(size: Int, init: (index: Int) -> T): MutableList<T> {
+    val list = ArrayList<T>(size)
+    repeat(size) { index -> list.add(init(index)) }
+    return list
+}
+
 /**
  * Returns an [IntRange] of the valid indices for this collection.
  */