Roadmap

[hasumikin]

mruby integration

• picorbc_context #104

indispensable

• fcall w/o arg
• fcall w/ multiple args
• $gvar
• @ivar
• CONSTANT
• recv.method
• recv.method.chain
• recv[]
• +, -, *, /, %
• (1 + 2) * 3
• **
• +=, -=, *=, /=, %=, &=, |=, ^=
• **=, <<=, >>=
• [0, 1, "Hello", :symbol] #=> Array
• {a: 0, "key" => :value} #=> Hash
• begin; end -> primary
• Mass assignment #86

mruby3

• OP_LOADI16
• unsigned index for JMP (relative jump)

simple keywords

• true, false, nil
• return
• self

particularly important on microcontroller

• !, ~, +, -
• not
• &, |, ^
• <<, >>
• 123e-02
• 0xffff, 0o777, 0b1111

conditional

• if then elsif else end
• unless then else end
• case when else end
• x ? y : z
• <, >
• ==, !=, <=, >=, ===, <=>
• &&, ||
• &&=, ||=
• and, or
• while, break, next, redo
• until, break, next, redo
• if modifier
• unless modifier

syntax sugar

• recv[]=, obj.attr=
• recv[]+=, obj.attr+=
• [1, 2].map(&:to_s)
• %w[], %i[] => Array

block, lambda

• for i in [1,2,3] #98
• break, next, redo in block
• [0,1].each do |var| end
• [0,1].each { |var| }
• a = 2; [1, 2].each{|i| a = i + a}; puts a => 5 ...OP_GETUPVAR, OP_SETUPVAR
• ->{ }
• yield

definition

• def hoge end
• class Klass < Super end
• Singleton method #91

method parameters

• mandatory
• opt
• rest
• mandatory2
• **kw_rest_args #101
• keyword argument #94
• block

exception

• rescue-retry-ensure #84

nice to have

• "concat" "enate" => "concatenate"
• po = "PO"; "inter#{po}lation" => "interPOlation"
• Range
• super
• alias
• OP_ADDI etc. #97
• Heredoc #95
• Rightward assignment (simple) #99

Improvements

• yyerror and something like that #96
• reswords (keyword as an IDENTIFIER) #100
• MRB_64BIT (> 2147483647) #103

should be fixed

• b=3; 2*b+=5
• obj.attr+=
• overriding lvar mistakenly: a=3;p "#{b=2}#{a+b}" => "26" (should be "25"). I may have to gather lvars before making VM code
• escape sequence in STRING ( "\n".ord => 10, p '\n' prints "\\n")
• escape sequence in Integer notation "\33[2J"
• 37 01 37 01 67 (double return)
• yy_pop_なんとかで謎のSEGV
• if a = true
  p a
  end
• 10**-2