# File lib/erb.rb, line 686
  def initialize(str, safe_level=nil, trim_mode=nil, eoutvar='_erbout')
    @safe_level = safe_level
    compiler = ERB::Compiler.new(trim_mode)
    set_eoutvar(compiler, eoutvar)
    @src = compiler.compile(str)
    @filename = nil
  end