Implement try/catch without finally, and without type checks.

frog/leg/resolver.dart

Index: frog/leg/resolver.dart
===================================================================
--- frog/leg/resolver.dart	(revision 3986)
+++ frog/leg/resolver.dart	(working copy)
@@ -844,11 +844,25 @@
   }
 
   visitTryStatement(TryStatement node) {
-    compiler.unimplemented('try', node: node);
+    visit(node.tryBlock);
+    if (node.catchBlocks.isEmpty() && node.finallyBlock == null) {
+      error(node, MessageKind.NO_CATCH_NOR_FINALLY);

[ahe, 2012/02/07 19:10:35]

The precise location here is:

node.getEndToken.next

[ngeoffray, 2012/02/08 09:52:23]

Added a TODO because there is no API for compiler where reportError takes a
token.

[ahe, 2012/02/08 10:19:27]

Please file a bug and assign it to me.

Cheers,
Peter

[ngeoffray, 2012/02/08 10:23:21]

Done: http://code.google.com/p/dart/issues/detail?id=1581

[ahe, 2012/02/08 10:27:12]

Thank you. I can see that you put the issue number in the TODO and this was
exactly what I hoped you'd do!

+    }
+    visit(node.catchBlocks);
+    visit(node.finallyBlock);
   }
 
   visitCatchBlock(CatchBlock node) {
-    compiler.unimplemented('catch', node: node);
+    Scope scope = new BlockScope(context);
+    if (node.formals.isEmpty()) {
+      error(node, MessageKind.EMPTY_CATCH_DECLARATION);
+    } else if (!node.formals.nodes.tail.isEmpty()
+               && !node.formals.nodes.tail.tail.isEmpty()) {
+      error(node.formals.nodes.tail.tail.head,

[ahe, 2012/02/07 19:10:35]

} else if (!node.formals.nodes.tail.isEmpty()) {
  for (Node extra in node.formals.nodes.tail.tail) {
   error(extra, ...)
  }

[ngeoffray, 2012/02/08 09:52:23]

Done.

+            MessageKind.TOO_MANY_CATCH_DECLARATIONS);
+    }
+    visitIn(node.formals, scope);
+    visitIn(node.block, scope);
   }
 
   visitTypedef(Typedef node) {