Check for index-out-of-bound in elementAt function (KT-30051)

libraries/stdlib/js/src/generated/_ArraysJs.kt

@@ -14,6 +14,87 @@ import kotlin.js.*
 import primitiveArrayConcat
 import withType
 
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun <T> Array<out T>.elementAt(index: Int): T {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun ByteArray.elementAt(index: Int): Byte {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun ShortArray.elementAt(index: Int): Short {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun IntArray.elementAt(index: Int): Int {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun LongArray.elementAt(index: Int): Long {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun FloatArray.elementAt(index: Int): Float {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun DoubleArray.elementAt(index: Int): Double {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun BooleanArray.elementAt(index: Int): Boolean {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun CharArray.elementAt(index: Int): Char {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
 /**
  * Returns a [List] that wraps the original array.
  */

libraries/stdlib/js/src/generated/_StringsJs.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. 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.text
+
+//
+// NOTE: THIS FILE IS AUTO-GENERATED by the GenerateStandardLib.kt
+// See: https://github.com/JetBrains/kotlin/tree/master/libraries/stdlib
+//
+
+import kotlin.js.*
+
+/**
+ * Returns a character at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this char sequence.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+public actual fun CharSequence.elementAt(index: Int): Char {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, length: $length}") }
+}
+

libraries/stdlib/js/src/generated/_UArraysJs.kt

@@ -12,6 +12,50 @@ package kotlin.collections
 
 import kotlin.js.*
 
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+@SinceKotlin("1.3")
+@ExperimentalUnsignedTypes
+public actual fun UIntArray.elementAt(index: Int): UInt {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+@SinceKotlin("1.3")
+@ExperimentalUnsignedTypes
+public actual fun ULongArray.elementAt(index: Int): ULong {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+@SinceKotlin("1.3")
+@ExperimentalUnsignedTypes
+public actual fun UByteArray.elementAt(index: Int): UByte {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
+/**
+ * Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this array.
+ * 
+ * @sample samples.collections.Collections.Elements.elementAt
+ */
+@SinceKotlin("1.3")
+@ExperimentalUnsignedTypes
+public actual fun UShortArray.elementAt(index: Int): UShort {
+    return elementAtOrElse(index) { throw IndexOutOfBoundsException("index: $index, size: $size}") }
+}
+
 /**
  * Returns a [List] that wraps the original array.
  */