From 8afa12684ec35165f24d4e97b118b428554e1ee2 Mon Sep 17 00:00:00 2001
From: Igor Chevdar <igor.chevdar@jetbrains.com>
Date: Wed, 22 Mar 2017 18:41:47 +0300
Subject: [PATCH] Implemented StringBuilder.deleteCharAt

---
 runtime/src/main/kotlin/kotlin/text/StringBuilder.kt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/runtime/src/main/kotlin/kotlin/text/StringBuilder.kt b/runtime/src/main/kotlin/kotlin/text/StringBuilder.kt
index 7a00af7e75d..7e358005244 100644
--- a/runtime/src/main/kotlin/kotlin/text/StringBuilder.kt
+++ b/runtime/src/main/kotlin/kotlin/text/StringBuilder.kt
@@ -1,4 +1,5 @@
 package kotlin.text
+import kotlin.collections.*
 
 @SymbolName("Kotlin_String_fromUtf8Array")
 external fun fromUtf8Array(array: ByteArray, start: Int, size: Int) : String
@@ -103,6 +104,12 @@ class StringBuilder private constructor (
     fun append(it: Double) = append(it.toString())
     fun append(it: Any?) = append(it.toString())
 
+    fun deleteCharAt(index: Int) {
+        checkIndex(index)
+        array.copyRangeTo(array, index + 1, length, index)
+        --length
+    }
+
     // ---------------------------- private ----------------------------
 
     private fun ensureExtraCapacity(n: Int) {