arg name

test.rb

def search_method_add_arg(sexp, indent = 0)
  results = []
  if sexp[0] == :method_add_arg
    results << sexp
  end
  sexp.each do |s|
    if s.is_a? Array
      results += search_method_add_arg(s, indent+2)
    end
  end
  results
end

def norm_arg(sexp)
  results = []
  results += norm_arg(sexp[1]) if sexp[1][0]==:args_add
  results << sexp[2]
  results
end

sexp = Ripper::SexpBuilder.new(f).parse
sexp = search_method_add_arg(sexp)
t = sexp.select{|s|
  next false if s[1][0] != :fcall
  s[1][1][2][0] == loc.lineno
}.last
args = norm_arg(t[2][1][1])

arg_names = args[0..1].map{|k| Sorcerer.source([:stmts_add, [:stmts_new], k]) }