Allow to use Regex matches CharSequence and CharSequence matches Regex in infix form

#KT-14279

js/js.libraries/src/core/regex.kt

@@ -52,7 +52,7 @@ public class Regex(pattern: String, options: Set<RegexOption>) {
     private val nativePattern: RegExp = RegExp(pattern, options.map { it.value }.joinToString(separator = "") + "g")
 
     /** Indicates whether the regular expression matches the entire [input]. */
-    public fun matches(input: CharSequence): Boolean {
+    public infix fun matches(input: CharSequence): Boolean {
         nativePattern.reset()
         val match = nativePattern.exec(input.toString())
         return match != null && match.index == 0 && nativePattern.lastIndex == input.length

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

@@ -44,7 +44,7 @@ header class Regex {
     constructor(pattern: String, options: Set<RegexOption>)
 
     fun matchEntire(input: CharSequence): MatchResult?
-    fun matches(input: CharSequence): Boolean
+    infix fun matches(input: CharSequence): Boolean
     fun containsMatchIn(input: CharSequence): Boolean
     fun replace(input: CharSequence, replacement: String): String
     fun replace(input: CharSequence, transform: (MatchResult) -> CharSequence): String

libraries/stdlib/src/kotlin/text/Strings.kt

@@ -677,7 +677,7 @@ public inline fun CharSequence.replaceFirst(regex: Regex, replacement: String):
  * Returns `true` if this char sequence matches the given regular expression.
  */
 @kotlin.internal.InlineOnly
-public inline fun CharSequence.matches(regex: Regex): Boolean = regex.matches(this)
+public inline infix fun CharSequence.matches(regex: Regex): Boolean = regex.matches(this)
 
 /**
  * Implementation of [regionMatches] for CharSequences.

libraries/stdlib/src/kotlin/text/regex/Regex.kt

@@ -116,7 +116,7 @@ internal constructor(private val nativePattern: Pattern) {
     public val options: Set<RegexOption> = fromInt(nativePattern.flags())
 
     /** Indicates whether the regular expression matches the entire [input]. */
-    public fun matches(input: CharSequence): Boolean = nativePattern.matcher(input).matches()
+    public infix fun matches(input: CharSequence): Boolean = nativePattern.matcher(input).matches()
 
     /** Indicates whether the regular expression can find at least one match in the specified [input]. */
     public fun containsMatchIn(input: CharSequence): Boolean = nativePattern.matcher(input).find()

libraries/stdlib/test/text/RegexTest.kt

@@ -11,8 +11,8 @@ class RegexTest {
         val p = "\\d+".toRegex()
         val input = "123 456 789"
 
-        assertFalse(input.matches(p))
-        assertFalse(p.matches(input))
+        assertFalse(input matches p)
+        assertFalse(p matches input)
 
         assertTrue(p in input)