Re: correctly placed @part before @node can be in ignored Top node

[Patrice Dumas]

On Fri, Apr 08, 2022 at 02:52:06PM +0100, Gavin Smith wrote:
> On Fri, Apr 08, 2022 at 03:36:59PM +0200, Patrice Dumas wrote:
> > On Fri, Apr 08, 2022 at 02:22:30PM +0100, Gavin Smith wrote:
> > > On Sun, Mar 20, 2022 at 11:47:41PM +0100, Patrice Dumas wrote:
> > > > On Sun, Mar 13, 2022 at 07:11:11PM +0000, Gavin Smith wrote:
> > > > > 
> > > > > Do you think you can do something similar for texi2any, i.e. not 
> > > > > include
> > > > > the @part line in the preceding node?
> > > > 
> > > > Should be done now.  Note that this also means that a @part before Top
> > > > node should be ignored too.
> > > > It is not the case in TeX right now.
> > > 
> > > I can see no way of implementing this in TeX.  The input in TeX is read
> > > from start to finish; there's no way of looking ahead to see if a @part
> > > is followed by '@node Top'.
> > 
> > I thought that this was already done for the case of a @node (not Top)
> > after a @part after Top node?
> 
> The ignoring starts at '@node Top' and continues until the next @node or
> @part command.

Then it is different from texi2any.  In texi2any in the following
@part part Intro and @chapter intro content is ignored:

 @node Top
 @top top

 @part part Intro
 @chapter intro

 @part part I
 @node node
 @chapter chap


I could change it such that the first @part stops the ignoring
independently of a @node being associated or not.  On the one hand,
it probably make sense, as @part is a kind of toplevel separation.
On the other hand, that will lead to 
 @part part Intro
 @chapter intro
not being associated to any node, such that in a document organized with
nodes (with USE_NODES true) the result may not be so good.  This is
the default for epub, which has both USE_NODES and NO_TOP_NODE_OUTPUT.

Should I try to stop ignoring at the first @part?

-- 
Pat