add example as test case

examples/stdlib/string/regex.check

@@ -11,3 +11,5 @@ ab
 cd
 (0, 2)
 (3, 5)
+matched: Hello 123 range: (0, 9)
+matched: World 456 range: (10, 19)

examples/stdlib/string/regex.effekt

@@ -16,16 +16,10 @@ def printIndices(m: Option[Match]) = printSome(m) { it =>
   }
 
 def printGroups(m: Option[Match]) = printSome(m) { it =>
-    it.groups.map { g => g.matched() }.join("\n")
+    it.groups.map { g => g.matched }.join("\n")
   }
 
 def printGroupIndices(m: Option[Match]) = {
-  def show(it: Option[Range]): String = {
-    it match {
-      case Some(r) => r.show()
-      case None() => "None"
-    }
-  }
   printSome(m) { it =>
     it.groups.map { g => g.index().show() }.join("\n")
   }
@@ -52,16 +46,21 @@ def main() = {
   rgx3.exec(src).printIndices()
 
   // capture groups
-  val rgx4 = regex("(\\w+) (\\w+)", [GenerateIndices()])
+  val rgx4 = regex("(\\w+) (\\w+)")
   val m1 = rgx4.exec(src)
   m1.printMatched()
   m1.printGroups()
   m1.printGroupIndices()
 
 
-
-
-
-
-
+  // example ussage
+  val rx = regex("(\\w+)\\s(\\d+)", [Global()])
+  val text = "Hello 123 World 456"
+  loop  { {l} =>
+    exec(rx, text)  match  {
+      case Some(m) =>
+        println("matched: " ++ m.matched ++ " range: (" ++ m.start.show() ++ ", " ++ m.end.show() ++ ")")
+      case None() => l.break()
+    }
+  }
 }

libraries/js/text/regex.effekt

@@ -94,13 +94,14 @@ def regex(pattern: String, flags: List[RegexFlags]): Regex = {
  *
  * Example usage:
  * ```effekt
- * val rx = regex("(\\w+)\\s(\\d+)", "g")
+ * val rx = regex("(\\w+)\\s(\\d+)", [Global()])
  * val text = "Hello 123 World 456"
- * while (true) {
- *  exec(rx, text) match = {
- *    Some(m) =>
- *      println("matched: " ++ m.matched ++ "range: " ++ m.start.show() ++ ", " ++ m.end.show()))
- *    None() => break
+ * loop  { {l} =>
+ *   exec(rx, text)  match  {
+ *     case Some(m) =>
+ *       println("matched: " ++ m.matched ++ " range: (" ++ m.start.show() ++ ", " ++ m.end.show() ++ ")")
+ *     case None() => l.break()
+ *   }
  * }
  * ```
  */
@@ -145,7 +146,7 @@ function regex$exec(reg, str) {
           matched: match[i],
           start: match.indices[i][0],
           end: match.indices[i][1]
-      }
+        })
     } else {
       // Push an empty string if an intermediate group is undefined
       groups.push({matched: ""});}
@@ -179,7 +180,7 @@ def show(m: Match): String = {
 }
 
 def show(g: Group): String = {
-  val range = g.index.show{ it => show(it) }
+  val range = g.index.show()
 
   g.matched ++  "\nfrom: " ++ range
 }