Can syntax clusters contain other clusters?

[BPJ]

The subject line says it all: I'm trying to use syntax clusters and wonder if clusters may contain other clusters, i.e. should this work?

syn cluster mydslAnyValue contains=@mydslValue,@mydslContainer

syn cluster mydslAllValues contains=@mydslAnyValue,mydslConstant

TIA,

/bpj

[Bram Moolenaar]

Yes, there is an example just above ":help E848".

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[BPJ]

The problem was with something else. Sorry for the noise!

[BPJ]

For my DSL I have a syntax region for text between a pair of delimiters inside which other syntax items should come in a specific order, say first dslFoo, then dslBar, then dslBaz.

I can use nextgroup=dslBar to declare which item should come after dslFoo and so on, but how do I declare that the first item inside the region must be a dslFoo? Is there a better approach than defining the opening delimiter as a match item to be followed by a dslFoo item and so on, but doesn't that prevent me from using contains and containedin? I wish I could do something like firstcontained=dslFoo on the region.

What is the best way to do this?

/bpj

[Charles Campbell]

BPJ wrote:
> For my DSL I have a syntax region for text between a pair of
> delimiters inside which other syntax items should come in a specific
> order, say first dslFoo, then dslBar, then dslBaz.
> I can use nextgroup=dslBar to declare which item should come after
> dslFoo and so on, but how do I declare that the first item inside the
> region must be a dslFoo? Is there a better approach than defining the
> opening delimiter as a match item to be followed by a dslFoo item and
> so on, but doesn't that prevent me from using contains and
> containedin? I wish I could do something like firstcontained=dslFoo on
> the region.
>
> What is the best way to do this?
>
> /bpj
>

Good luck with getting this! I've asked for it over a decade ago. Bottom
line: currently, you can't.

Uses: region would start properly but, since its a region, would allow
it to be folded, syntax changed (perl/tex/sh) for start/end patterns, etc.

Chip Campbell

[M]

вт, 23 авг. 2022 г. в 20:02, Charles Campbell <camp...@drchip.org>:

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What if you define dslFoo after both dslBar and dslBaz? Won't it be enough?

Kind regards,

Matvey

[BPJ]

I have found that using patterns with lookahead/lookbehind works reasonably well in most cases (for this syntax at least). It feels like overkill though and is harder to maintain because I may need to change patterns in two or more places instead of one.

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