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-Guard against including a ragel file more than once (newsgroup).
-
-Line numbers in included files refer to the master file. This needs to be
-fixed -- from Manoj.
-
-Remove old action embedding and condition setting syntax.
-
-fbreak should advance the current char. Depreciate fbreak and add
-    fctl_break;
-    fctl_return <expr>;
-    fctl_goto <label>;
-This is needed for better support of pull scanners.
-
-Eliminate tokend, replace it with the marker variable and add ftokend/ftoklen.
-
-Add the accept action embedding operator: like eof but only for states that end
-up final. Add the combined pending/accept action. This becomes a good idea when
-eof action execution is moved into the main loop.
-
-Add a prefix operator which sets every state final.
-
-Minimization should remove a condition when the character allows both
-the positive and negative sense of the condition. This happens in:
-test_every_10_chars = ( ( c when test_len ) c{0,9} )**;
-In this example there is non-determinsm that is killed by the priorities, but
-since conditions are expanded before priorities are tested, many transitions
-end up with test_len || !test_len.
-
-Should be possible to include scanner definitions in another scanner.
-
-Need an "entry name;" feature, causing name to get written out with the other
-entry points in the data.
-
-Possibly bring back the old semantics of > in a new operator, or allow it to be
-defined somehow.
-
-When priorities are embedded without a name, the name of the current machine is
-used. Perhaps a unique name for each instance of the current machine should be
-used instead. This idea could work well if applied to user-defined embeddings. 
-
-User defined embeddings <-name(a1,a2,...).
-User defined operators expr1 <name> expr2.
-
-Doesn't make make sense for [] to be the lambda (zero-length) machine. This
-should be the empty set (the empty machine). But then would it be invalid in a
-regular expression?
-
-The |> guarded operator and the <| guarded operator need to be added.
-
-An option to turn off the removal of duplicate actions might be useful for
-analyzing unintentional nondeterminism.
-
-Might be a good idea to add in some protection against using up all of a
-system's memory. This protection could then be removed by people when someone
-is sure they want to use a lot of memory.
-
-
-If a scanner can be optimized into a pure state machine, maybe permit it to be
-referenced as a machine definition. Alternately: inline scanners with an
-explicit exit pattern.
-
-The split codegen needs a profiler connected to a graph partitioning algorithm.
-
-Die a graceful death when rlcodegen -F receives large alphabets.
-
-It's not currently possible to have more than one machine in a single function
-because of label conflicts. Labels should have a unique prefix.
-
-Emit a warning when a subtraction has no effect.
-
-Emit a warning when unnamed priorities are used in longest match machines.
-These priorities may unexpectedly interact across longest-match items. Changing
-the language such that unwated interaction cannot happen would require naming
-longest-match items.
-
-Testing facilities: Quick easy way to query which strings are accepted.
-Enumerate all accepted strings. From Nicholas Maxwell Lester.
-
-Add more examples, add more tests and write more documentation.
-
-A debugger would be nice. Ragel could emit a special debug version that
-prompted for debug commands that allowed the user to step through the machine
-and get details about where they are in their RL.
-
-A quick and easy alternative would be a trace code generation option. This
-would open a trace file and list all the active machines at each step of the
-input.
-
-Frontend should allow the redefinition of fsm section delimiters.
-
-Do more to obscure ragel's private variables. Just a leading underscore is not
-enough. Maybe something more like __ri__.
-
-Some talk about capturing data:
-
-Separate tokstart/tokend from the backtracking.  One var for preservation,
-called preserve.  Write delcarations;  produces the necessary variables used by
-ragel.  Move pattern start pattern end concepts into the general?  The
-variables which may need to influence the preserve is dependent on the state.
-States have a concept of which variables are in use.  Can be used for length
-restrictions.  If there is an exit pattern, it is the explicit way out,
-otherwise the start state and all final states are a way out.