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tag: v1_6_4_preview1
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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"]
- objectify symbols
- class variable (prefix @@)
- rescue RuntimeError => err
* operator !! for rescue. ???
* 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
* Fixnum 0 as false ????
* discourage use of symbol variable (e.g. $/, etc.) in manual
* discourage use of Perlish features by giving warnings.
* non confusing in-block local variable (is it possible?)
  + remove scope by block
  + variables appears within block may have independent values.
* Regexp: make /o thread safe.
* decide if begin with rescue or ensure make do..while loop.
* a +1 to be a+1, not a(+1).

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 (use fork ???)
* objectify interpreters ???
* remove rb_eval() recursions
* syntax tree -> bytecode ???
* scrambled script, or script filter
* setuid ruby
* performance tune for in-block (dynamic) local variables.
* generational GC
* give warnings to assign magic variables.
* export rb_io_{addstr,printf,puts,print}
* autoload should work with threads [ruby-talk:4589]
* remove stdio dependency from IOs.
* warn for inconsistent local variable usage (lv m and method m at the same time).

Standard Libraries

- hash[key] = nil does 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 NotImplementedError are subclasses of
  ScriptError<Exception, not StandardError.
- Thread::start gives arguments, not a thread object to the block
- regexp: (?>..), \G
- Struct::new([name,]member,...)
- IO#reopen accepts path as well
- Kernel#scan
- call initialize for builtin classes too
- performance tune for String's non-bang methods.
- 'w' template for pack/unpack
- alternative for interator? => block_given?
- regex - /p (made obsolete), /m (new)
- consistent /, %, divmod
- unbound method object
- integrate final.rb into the core.
* Enumerable#sort_by for Schwartzian transformation
* String#scanf(?)
* Object#fmt(?)
* Integer#{bin,oct,hex,heX}
* 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()
* Ruby module -- Ruby::Version, Ruby::Interpreter
* introduce Boolean class; super of TrueClass, FalseClass
* Process::waitall [ruby-talk:4557]
* synchronized method - synchronized{...}, synchronized :foo, :bar
* move Time::times to Process.
- Module#define_method which takes a name and a body (block, proc or method).
* IO#for_fd in general
* Array#&, Array#| to allow duplication. ???
- fork_and_kill_other_threads.
* way to specify immortal (fork endurance) thread;
* or raise ForkException to every thread but fork caller.
* Array#fetch

Extension Libraries

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

Ruby Libraries

- net/http.rb
* add uri.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
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