Language Spec.

- def foo; .. rescue .. end
- compile time string concatenation, "hello" "world" => "helloworld"
- rescue modifier; a rescue b => begin a rescue; b end
- %w(a\ b\ c abc) => ["a b c", "abc"]
* class variable (prefix @@?) ??
* operator !! for rescue. ???
* objectify symbols
* objectify characters
* ../... outside condition invokes operator method too.
* ... inside condition turns off just before right condition.???
* package or access control for global variables??
* named arguments like foo(nation:="german") or foo(nation: "german").
* method to retrieve argument information (needs new C API)
* multiple return values, yield values.  maybe incompatible ???
* cascading method invocation ???
* def Class#method .. end ??
* class Foo::Bar<Baz .. end, module Boo::Bar .. end
* def Foo::Bar::baz() .. end ??
* I18N (or M17N) script/string/regexp

Hacking Interpreter

- use eban's fnmatch
- RUBYOPT environment variable
- alias $defout $>
- retrieve STACK_LEVEL_MAX from users' limit.
- remove end_proc registered out of require only
- all object made freezable
* non-blocking open (e.g. for named pipe) for thread
* avoid blocking with gethostbyname/gethostbyaddr
* objectify interpreters
* remove rb_eval() recursions
* syntax tree -> bytecode ???
* scrambled script, or script filter
* setuid ruby

Standard Libraries

- hash[key] = nil may not remove entry; hashes may have nil as the value.
- hash.fetch(key) raises exception if key is not found.
- Array#{first,last,at}
- Dir.glob(pat){|f|...}
- sprintf/printf's $ to specify argument order
- Dir.glob("**/*.c") ala zsh
- Remove Enumerable#{size,length}
- Array#slice, Array#slice!
- String#slice, String#slice!
- Marshal should handle generic instance variables.
- debugger for thread programming
- SyntaxError, NameError, LoadError and NotImplementError are subclasses of
  ScriptError<Exception, not StandardError.
- String's bang methods return string always
* Struct::new([name,]member,...) ??
* String#scanf(?)
* Object#fmt(?)
* Time::strptime
* Integer[num], Float[num];  Fixnum[num]?
* method to retrieve non-number trailer for to_i/to_f.
* Stream or Port, abstract superclass of IO ?
* String#{pred,prev}, String#downto
* optional stepsize argument for succ()

Extension Libraries

- FastCGI ruby
* ptk.rb pTk wrapper that is compatible to tk.rb
* Berkeley DB extension

Ruby Libraries

- net/http.rb
* urllib.rb, nttplib.rb, etc.
* format like perl's

Tools

- extension library maker using SWIG
* freeze or undump to bundle everything

Misc

- publish Ruby books
* publish Ruby books in English