Simplify the String.toRegex extension to a single function that uses a default arg.

Also moved it to the String.kt source file that that String extension functions can be found in a single place.

libraries/stdlib/src/JavaUtil.kt

@@ -104,15 +104,3 @@ inline fun <T> java.util.Collection<T>.notEmpty() : Boolean = !this.isEmpty()
 inline fun <T> java.util.Collection<T>?.orEmpty() : Collection<T>
     = if (this != null) this else Collections.EMPTY_LIST as Collection<T>
 
-/** Converts the string into a regular expression [[Pattern]] so that strings can be split or matched on */
-inline fun String.toRegex(): Pattern {
-    return Pattern.compile(this).sure()
-}
-
-/**
- * Converts the string into a regular expression [[Pattern]] with the given flags from [[Pattern]] or'd together
- * so that strings can be split or matched on
- */
-inline fun String.toRegex(flags: Int): Pattern {
-    return Pattern.compile(this, flags).sure()
-}

libraries/stdlib/src/String.kt

@@ -113,6 +113,15 @@ inline fun String.toLong() = java.lang.Long.parseLong(this).sure()
 inline fun String.toFloat() = java.lang.Float.parseFloat(this).sure()
 inline fun String.toDouble() = java.lang.Double.parseDouble(this).sure()
 
+/**
+ * Converts the string into a regular expression [[Pattern]] optionally
+ * with the specified flags from [[Pattern]] or'd together
+ * so that strings can be split or matched on.
+ */
+inline fun String.toRegex(flags: Int=0): java.util.regex.Pattern {
+    return java.util.regex.Pattern.compile(this, flags).sure()
+}
+
 /**
 Iterator for characters of given CharSequence
 */

libraries/testlib/test/StringTest.kt

@@ -33,4 +33,17 @@ class StringTest() : TestCase() {
         assertEquals("hey", s.orEmpty())
         assertEquals("", ns.orEmpty())
     }
+
+    fun testToShort() {
+        assertEquals(77.toShort(), "77".toShort())
+    }
+
+    fun testToInt() {
+        assertEquals(77, "77".toInt())
+    }
+
+    fun testToLong() {
+        assertEquals(77.toLong(), "77".toLong())
+    }
+
 }