Rename Regex.hasMatch to containsMatchIn, and add corresponding contains function to CharSequence.

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

@@ -777,6 +777,12 @@ public operator fun String.contains(seq: CharSequence, ignoreCase: Boolean = fal
 public operator fun String.contains(char: Char, ignoreCase: Boolean = false): Boolean =
         indexOf(char, ignoreCase = ignoreCase) >= 0
 
+/**
+ * Returns `true` if this string contains at least one match of the specified regular expression [regex].
+ */
+public operator fun CharSequence.contains(regex: Regex): Boolean = regex.containsMatchIn(this)
+
+
 // rangesDelimitedBy
 
 

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

@@ -114,8 +114,11 @@ public class Regex internal constructor(private val nativePattern: Pattern) {
     /** Indicates whether the regular expression matches the entire [input]. */
     public fun matches(input: CharSequence): Boolean = nativePattern.matcher(input).matches()
 
-    /** Indicates whether the regular expression can find at least a match in the specified [input]. */
-    public fun hasMatch(input: CharSequence): Boolean = nativePattern.matcher(input).find()
+    /** 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()
+
+    @Deprecated("Use containsMatchIn() or 'in' operator instead.", ReplaceWith("this in input"))
+    public fun hasMatch(input: CharSequence): Boolean = containsMatchIn(input)
 
     /**
      * Returns the first match of a regular expression in the [input], beginning at the specified [startIndex].

libraries/stdlib/test/text/RegexTest.kt

@@ -14,7 +14,7 @@ class RegexTest {
         assertFalse(input.matches(p))
         assertFalse(p.matches(input))
 
-        assertTrue(p.hasMatch(input))
+        assertTrue(p in input)
 
         val first = p.find(input)
         assertTrue(first != null); first!!