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Re: \hbox_set:Nn issue after expl3 [2017/05/13] update

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Sun, 20 Aug 2017 23:52:26 +0200

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 Hi, On Wed, 2017-08-09 at 09:50 +0100, Joseph Wright wrote: > On 09/08/2017 00:18, Benjamin Berg wrote: > > just ran into the same issue myself. I haven't been able to solve my > > usage yet but noticed in the processes that \vbox_set_top:Nw seems to > > be still missing. > > Could you give a bit more detail of the case you need to solve? I would expect it to be added either way, just so that the API is the same for the different boxes :) Anyway, the case I am trying to solve is a macro which in reality puts the content into a box (this can be a vtop or hbox depending on the command). So my user would type something like:   \question[text=some text]{\verb^some text^} Here the "some text" is exported as metadata and the \verb should be put into the box. I could implement the above command correctly using \vbox_set_top:Nw by swallowing the opening braces and emitting \vbox_set_end: using \group_insert_after: for the closing brace. For now I have done a workaround using \vtop directly. The reason to use \vtop is a bit more odd. I was unhappy that I wouldn't get the correct interline skip for the first row of the vbox. So my solution was to put it into a \vtop to measure the height and then unpack it into a normal \vbox to get the correct \prevdepth value after the box has been added to the vertical list. Note that this works as I am calculating the interline skip myself. There are a number of other (weird) things which make everything more complicated, but I think this might explain enough. I am happy to explain in more detail or point to the code. Benjamin