Re: Lyx layouts, and DependsOn: Doesn't force inclusion in preamble?

[Paul A. Rubin]

On 01/23/2018 12:27 PM, Klaus-Dieter Bauer wrote:
Hello!
Is there some way to specify layouts, that depend on the preamble of 
another?

Consider e.g. the following LyX file:

    #LyX 2.3 created this file.
    \lyxformat 544
    \begin_document
    \begin_header
    \begin_local_layout
    InsetLayout Flex:AAA
    LyxTypecustom
    LabelStringAAA
    LatexNameAAA
    LatexTypecommand
    Preamble
    \newcommand\AAA[1]{hello #1 world}
    EndPreamble
    End

    InsetLayout Flex:BBB
    LyxTypecustom
    LabelStringBBB
    LatexNameBBB
    LatexTypecommand
    DependsOnFlex:AAA
    Preamble
    \newcommand\BBB[1]{bye(\AAA{#1})}
    EndPreamble
    End

    \end_local_layout
    \end_header
    \begin_body
    \begin_layout Standard
    \begin_inset Flex BBB
    status open
    \begin_layout Plain Layout
    Hello.
    \end_layout
    \end_inset
    \end_layout
    \end_body
    \end_document


The dependency of BBB on AAA is explicitly declared, but using \BBB in 
the body adds only the preamble of \BBB, but not the preamble of \AAA, 
causing an "undefined control sequence" error on compilation.

As I understand, DependsOn merely declares that the preamble of AAA 
should be added /before/ the preamble of BBB, but only _if_ AAA is 
used itself.

I couldn't find any feature that allows to declare an actual 
dependency, rather than just the ordering. Am I missing something?

- Klaus
What about putting the AAA and BBB insets in separate .inc files (say 
AAA.inc and BBB.inc), and then inputing the AAA.inc file near the top of 
the BBB.inc file?

Paul