[K/N] Commonize String.regionMatches function

As a part of efforts to stabilize K/N stdlib.

kotlin-native/runtime/src/main/kotlin/kotlin/text/Strings.kt

@@ -185,7 +185,8 @@ public actual fun CharSequence.regionMatches(
  * @param otherOffset the start offset in the other string of the substring to compare.
  * @param length the length of the substring to compare.
  */
-public fun String.regionMatches(
+@Suppress("ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS")
+public actual fun String.regionMatches(
         thisOffset: Int, other: String, otherOffset: Int, length: Int,
         ignoreCase: Boolean = false): Boolean {
     if (length < 0 || thisOffset < 0 || otherOffset < 0

libraries/stdlib/api/js-v1/kotlin.text.kt

@@ -689,6 +689,9 @@ public inline fun kotlin.CharSequence.reduceRightOrNull(operation: (kotlin.Char,
 
 public fun kotlin.CharSequence.regionMatches(thisOffset: kotlin.Int, other: kotlin.CharSequence, otherOffset: kotlin.Int, length: kotlin.Int, ignoreCase: kotlin.Boolean = ...): kotlin.Boolean
 
+@kotlin.SinceKotlin(version = "1.9")
+public fun kotlin.String.regionMatches(thisOffset: kotlin.Int, other: kotlin.String, otherOffset: kotlin.Int, length: kotlin.Int, ignoreCase: kotlin.Boolean = ...): kotlin.Boolean
+
 public fun kotlin.CharSequence.removePrefix(prefix: kotlin.CharSequence): kotlin.CharSequence
 
 public fun kotlin.String.removePrefix(prefix: kotlin.CharSequence): kotlin.String

libraries/stdlib/api/js/kotlin.text.kt

@@ -689,6 +689,9 @@ public inline fun kotlin.CharSequence.reduceRightOrNull(operation: (kotlin.Char,
 
 public fun kotlin.CharSequence.regionMatches(thisOffset: kotlin.Int, other: kotlin.CharSequence, otherOffset: kotlin.Int, length: kotlin.Int, ignoreCase: kotlin.Boolean = ...): kotlin.Boolean
 
+@kotlin.SinceKotlin(version = "1.9")
+public fun kotlin.String.regionMatches(thisOffset: kotlin.Int, other: kotlin.String, otherOffset: kotlin.Int, length: kotlin.Int, ignoreCase: kotlin.Boolean = ...): kotlin.Boolean
+
 public fun kotlin.CharSequence.removePrefix(prefix: kotlin.CharSequence): kotlin.CharSequence
 
 public fun kotlin.String.removePrefix(prefix: kotlin.CharSequence): kotlin.String

libraries/stdlib/common/src/kotlin/TextH.kt

@@ -311,6 +311,22 @@ expect fun CharSequence.regionMatches(
     ignoreCase: Boolean = false
 ): Boolean
 
+/**
+ * Returns `true` if the specified range in this string is equal to the specified range in another string.
+ * @param thisOffset the start offset in this string of the substring to compare.
+ * @param other the string against a substring of which the comparison is performed.
+ * @param otherOffset the start offset in the other string of the substring to compare.
+ * @param length the length of the substring to compare.
+ */
+@SinceKotlin("1.9")
+public expect fun String.regionMatches(
+    thisOffset: Int,
+    other: String,
+    otherOffset: Int,
+    length: Int,
+    ignoreCase: Boolean = false
+): Boolean
+
 
 /**
  * A Comparator that orders strings ignoring character case.

libraries/stdlib/js/src/kotlin/text/stringsCode.kt

@@ -89,9 +89,38 @@ public actual fun String?.equals(other: String?, ignoreCase: Boolean = false): B
 }
 
 
+/**
+ * Returns `true` if the specified range in this char sequence is equal to the specified range in another char sequence.
+ * @param thisOffset the start offset in this char sequence of the substring to compare.
+ * @param other the string against a substring of which the comparison is performed.
+ * @param otherOffset the start offset in the other char sequence of the substring to compare.
+ * @param length the length of the substring to compare.
+ */
 @Suppress("ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS")
-public actual fun CharSequence.regionMatches(thisOffset: Int, other: CharSequence, otherOffset: Int, length: Int, ignoreCase: Boolean = false): Boolean =
-    regionMatchesImpl(thisOffset, other, otherOffset, length, ignoreCase)
+public actual fun CharSequence.regionMatches(
+    thisOffset: Int,
+    other: CharSequence,
+    otherOffset: Int,
+    length: Int,
+    ignoreCase: Boolean = false
+): Boolean = regionMatchesImpl(thisOffset, other, otherOffset, length, ignoreCase)
+
+/**
+ * Returns `true` if the specified range in this string is equal to the specified range in another string.
+ * @param thisOffset the start offset in this string of the substring to compare.
+ * @param other the string against a substring of which the comparison is performed.
+ * @param otherOffset the start offset in the other string of the substring to compare.
+ * @param length the length of the substring to compare.
+ */
+@SinceKotlin("1.9")
+@Suppress("ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS")
+public actual fun String.regionMatches(
+    thisOffset: Int,
+    other: String,
+    otherOffset: Int,
+    length: Int,
+    ignoreCase: Boolean = false
+): Boolean = regionMatchesImpl(thisOffset, other, otherOffset, length, ignoreCase)
 
 
 /**

libraries/stdlib/jvm/src/kotlin/text/StringsJVM.kt

@@ -649,7 +649,8 @@ public actual fun CharSequence.regionMatches(thisOffset: Int, other: CharSequenc
  * @param otherOffset the start offset in the other string of the substring to compare.
  * @param length the length of the substring to compare.
  */
-public fun String.regionMatches(thisOffset: Int, other: String, otherOffset: Int, length: Int, ignoreCase: Boolean = false): Boolean =
+@Suppress("ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS")
+public actual fun String.regionMatches(thisOffset: Int, other: String, otherOffset: Int, length: Int, ignoreCase: Boolean = false): Boolean =
     if (!ignoreCase)
         (this as java.lang.String).regionMatches(thisOffset, other, otherOffset, length)
     else

libraries/stdlib/wasm/src/kotlin/text/StringsWasm.kt

@@ -501,6 +501,23 @@ actual fun CharSequence.regionMatches(
     ignoreCase: Boolean
 ): Boolean = regionMatchesImpl(thisOffset, other, otherOffset, length, ignoreCase)
 
+/**
+ * Returns `true` if the specified range in this string is equal to the specified range in another string.
+ * @param thisOffset the start offset in this string of the substring to compare.
+ * @param other the string against a substring of which the comparison is performed.
+ * @param otherOffset the start offset in the other string of the substring to compare.
+ * @param length the length of the substring to compare.
+ */
+@SinceKotlin("1.9")
+@Suppress("ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS")
+public actual fun String.regionMatches(
+    thisOffset: Int,
+    other: String,
+    otherOffset: Int,
+    length: Int,
+    ignoreCase: Boolean = false
+): Boolean = regionMatchesImpl(thisOffset, other, otherOffset, length, ignoreCase)
+
 private val STRING_CASE_INSENSITIVE_ORDER = Comparator<String> { a, b -> a.compareTo(b, ignoreCase = true) }
 
 /**