lexer_->main_input_name_ = "<string>";
lexer_->is_main_input_ = true;
lexer_->new_input (lexer_->main_input_name_, ly_code, sources_);
SCM mod = lexer_->set_current_scope ();
lexer_->main_input_name_ = "<string>";
lexer_->is_main_input_ = true;
lexer_->new_input (lexer_->main_input_name_, ly_code, sources_);
SCM mod = lexer_->set_current_scope ();