grammar Primitive
  include Helper

  rule primitive
    string | bool | datetime | number
  end

  ##
  # String rules
  ##

  rule string
    multiline_string | multiline_literal | basic_string | literal_string
  end

  rule basic_string
    (/(["])(?:\\?.)*?\1/ space) <TomlBasicString>
  end

  rule literal_string
    (/(['])(?:\\?.)*?\1/ space) <TomlLiteralString>
  end

  rule multiline_string
    ('"""' line_break* text:~'"""' '"""' space) <TomlMultilineString>
  end

  rule multiline_literal
    ("'''" line_break* text:~"'''" "'''" space) <TomlMultilineLiteral>
  end

  ##
  # Date time rules
  ##

  rule datetime
    (date_skeleton ("Z" | date_offset | [,\.] frac:(/\d/1*6) date_offset)) {
      skeleton = captures[:date_skeleton].first
      y,m,d,h,mi,s = skeleton.value
      offset = captures[:date_offset].first || "+00:00"
      sec_frac = captures[:frac].first || 0
      s = "#{s}.#{sec_frac}".to_f

      Time.new(*[y,m,d,h,mi,s,offset.to_s])
    }
  end

  rule date_skeleton
    (y:/\d\d\d\d/ "-" m:/\d\d/ "-" d:/\d\d/ "T" h:/\d\d/ ":" mi:/\d\d/ ":" s:/\d\d/) {
      [:y,:m,:d,:h,:mi,:s].map{ |s| capture(s).value }
    }
  end

  rule date_offset
    offset:(sign /\d\d/ ":" /\d\d/)
  end

  ##
  # Number rules
  ##

  rule number
     exponent | float | integer
  end

  rule float
    (integer '.' integer) { to_str.to_f }
  end

  rule exponent
    ( (float | integer) [eE] integer) { to_str.to_f }
  end

  rule integer
    (sign? [0-9_]+) { to_str.to_i }
  end

  rule sign
    '+' | '-'
  end

  ##
  # Boolean rules
  ##

  rule bool
    true | false
  end

  rule true
    'true' { true }
  end

  rule false
    'false' { false }
  end

  ##
  # Key rules
  ##

  rule key
    quoted_key | bare_key
  end

  rule bare_key
    [a-zA-Z_] [a-zA-Z0-9_-]*
  end

  rule quoted_key
    string
  end
end