[Mono-bugs] [Bug 77767][Nor] Changed - [PATCH][GMCS] allow yield break in catch clause

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Changed by atsushi at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=77767

--- shadow/77767	2006-03-13 17:13:23.000000000 -0500
+++ shadow/77767.tmp.11054	2006-03-14 00:31:37.000000000 -0500
@@ -61,6 +61,47 @@
 ------- Additional Comments From miguel at ximian.com  2006-03-13 17:13 -------
 Am pretty sure that yielding inside a catch was not allowed.
 
 Maybe something changed, but we need to make sure that if we yield in
 a catch clause  that the generated code actually works and generates
 the proper code.
+
+------- Additional Comments From atsushi at ximian.com  2006-03-14 00:31 -------
+yield return inside try-statement with catch clauses is still invalid
+in the latest specification. Considering that all other terms on yield
+validity it is carefully defined.
+
+Allowing yield break makes sense in such situation like:
+
+using System;
+using System.Collections.Generic;
+
+public class Test
+{
+        public IEnumerator<string> GetEnumerator ()
+        {
+                yield return "TEST";
+                try {
+                        int.Parse (args [0]);
+                } catch {
+                        yield break;
+                }
+                yield return "TEST2";
+        }
+
+        static void Main (string [] args)
+        {
+                new Test ().Run (args);
+        }
+
+        string [] args;
+        void Run (string [] args)
+        {
+                this.args = args;
+                foreach (string s in this)
+                        Console.WriteLine (s);
+        }
+}
+
+("mono blah.exe" and "mono blah.exe 1" shows the differences.)
+
+I'm going to prepare patch for mcs too.