On 02/01/2012 15:02, Philipp Stephani wrote:
> 2011/12/30 Joseph Wright <[log in to unmask]>:
>> In some parts of the coffin code, we do this 'directly' using
>>  \hbox_unpack:N \c_empty_box
> What about \quitvmode (available in pdfTeX and LuaTeX, but not XeTeX)?

Two problems. It's not available across all engines [:-)], and it would
cause all sorts of issues with the galley (which relies on \everypar).
Joseph Wright