Hi, list! My question is just like that: how do I pass buffers or \input content to \processtokens. What I have done so far:

\tolerant\protected\def\foo#={\ifparameter#1\or\oof{#1}\fi}
\protected\def\oof#1{<#1>}
\startbuffer[ofo]
% Output: Th<i>s <is> not a <question> anymore!
Th{i{s {is} not a {question} anymore!
\stopbuffer
\starttext
\processtokens\foo\foo\relax\space{Th{i}s {is} not a {question} anymore!}
% Neither \inlinebuffer nor \rawbuffer work in the example above
\stoptext

I've also tried a variant of the mechanism described in OPmac trick described here to process content token by token, but it only works with \normalinput. Any suggestions or guidance? Thank you in advance. 

Best regards,
Jairo