Things to Do in the future

After mruby 3.1

• parser and code generator independent from mrb_state (picoruby?)
• variable sized AST node
• iv/hash entry cache
• more peephole optimization (if possible)

Things to do (Things we need to consider)

• begin ... end while cond to behave as CRuby
• special variables (\(1,\)2..)