\tl_if_eq_p:Vn variant test

gistfile1.txt

\documentclass{scrartcl}

\usepackage{expl3}

\ExplSyntaxOn

\cs_generate_variant:Nn \tl_if_eq:nnTF { VnTF }
\cs_generate_variant:Nn \tl_if_eq_p:NN { Vn }

\tl_new:N \l__tmp_tl
\tl_gset:Nn \l__tmp_tl { some~tokenlist }

\bool_new:N \l__tmp_bool

\cs_new_protected:Nn \__update_tmp_bool:n
{
  \tl_if_eq:VnTF \l__tmp_tl { #1 } {
    \bool_set:Nn \l__tmp_bool \c_true_bool
  } {
    \bool_set:Nn \l__tmp_bool \c_false_bool
  }
}

\cs_new_protected:Nn \test_func:n
{
  % The weird thing is that \tl_if_eq_p:Vn does not seem to work
  % inside the \bool_until_do?
  \__update_tmp_bool:n { #1 }

  %%%%%%%%%%%
  % To Test, simply enable the other \bool_until_do:nn line.
  %%%%%%%%%%%

  % This line will not terminate:
  %\bool_until_do:nn { \tl_if_eq_p:Vn \l__tmp_tl { #1 } } {

  % While this one will terminate:
  \bool_until_do:nn { \l__tmp_bool } {


    % Do something (here we just set the token to the stop condition)
    Token\ is:\ \tl_use:N \l__tmp_tl \newline
    \tl_gset:Nn \l__tmp_tl { #1 }

    \__update_tmp_bool:n { #1 }
  }
  Token\ after\ loop:\ \tl_use:N \l__tmp_tl \newline
}



\begin{document}
\test_func:n { stop~condition }
\end{document}

\ExplSyntaxOff