Add my notes on missing stuff

svn path=/trunk/mcs/; revision=111662

diff --git a/mcs/mcs/repl.txt b/mcs/mcs/repl.txt
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+Things to do for the REPL support in MCS:
+
+Documentation for the REPL mode for MCS can be found here:
+
+             http://mono-project.com/CsharpRepl
+
+Apply the patch repl.patch to this directory, then either rebuild
+Mono, or go to mcs and type:
+
+       make q
+       make repl
+
+* Mix statements with other top-level declarations.
+
+       Currently we only process statements, but it would be useful
+       to define classes, interfaces and structs inline.   
+
+       These pose a problem, as the grammar conflicts on a few 
+       elements like delegate (delegate declaration or anonymous
+       method declration).
+
+       To address this issue, I should build a mini-parser into
+       repl.cs that does an initial pass at the input stream and
+       determines with as many lookahead tokens as needed whether the
+       text is regular toplevel declaration or our statement
+       declaration.
+
+       This would solve the grammar ambiguity that happens if we just
+       allow both to be starting nodes.
+
+* Implement auto-insert-semicolon
+
+       This is easy to implement, just retry the parse with a
+       semicolon, the question is whether this is a good idea to do
+       in the first place or not.
+
+* Tab Completion
+
+       Implement tab completion on names, variables and type lookups.
+
+       This could be implemented by having the TAB key force the
+       expression to be evaluated with a special COMPLETE token
+       at the end.
+
+       Then the various productions (one by one) would have to
+       add support for COMPLETE, and having Resolve methods be
+       aware of this.
+