% v1916test.tex

\input fontinst.sty

% \half and \otherhalf
\fontinstcc
\for(i){-5}{5}{1}
   \eval_expr_to\b_count{\half{\int{i}}}
   \eval_expr{\otherhalf{\int{i}}}
   \immediate\write16{\strint{i}:~\the\b_count \space+~ \the\result}
\endfor(i)
\normalcc

\bye