anchor.diff:  -record(c_apply, {anno=[], op,		% op :: Tree,
   		  args}).		% args :: [Tree]
   
  --record(c_binary, {anno=[], segments}).	% segments :: [#c_bitstr{}]
  +-record(c_binary, {anno=[], segments :: [cerl:c_bitstr()]}).
   
   -record(c_bitstr, {anno=[], val,        % val :: Tree,
   		   size,		% size :: Tree,
  
positive.code: 
  -record(c_literal, {anno=[], val}).	% val :: literal()
  
  -record(c_module, {anno=[], name,	% name :: Tree,
  		   exports,		% exports :: [Tree],
  		   attrs,		% attrs :: [#c_def{}],
  
negative.code: -record(c_values, {anno=[], es}).	% es :: [Tree]
  
  -record(c_var, {anno=[], name :: cerl:var_name()}).
  