[Geany-Devel] [FT-plugins] Proposed "Features"

[Jiří Techet]

>
> The solution I have in mind simply allows plugins to pass tags to Geany
> which they parsed with more advanced code. The tags itself would advanced
> too, to allow for the improvements current TM+ctags can't offer. Symbol
> tree, calltips, autocompletion, jump-to-decl can all be improved based on
> the advanced tags.
>

I'm personally very happy that Matthew decided to go the way he proposed
instead of doing what you propose. As I said in one of the posts here

https://github.com/geany/geany/pull/1187

it's not a matter of how "advanced" the tags are but that the tags are
represented in a completely different way - tree vs list. There's info in
the tree that cannot be stored in the list and similarly ctags list cannot
be converted to AST. You can start doing some crazy things like serializing
AST to a list and then deserializing it to a tree or having parallel AST-TM
and list-TM but things are complicated enough in TM already and merging
ASTs during source file updates would be really complicated. Also
performance would suffer because operations on GPtrArrays are really fast
as they don't require pointer dereferencing. In addition I think each
library will have its own partially incompatible AST representation and
different info will be needed e.g. for autocompletion and it will be really
hard to find something generic enough.

So big +1 for Matthew's approach from me. What might be good though is
filling the "simple" TMTags with "advanced" libclang or any other tags into
the existing TM. Some info will be lost on the way but this info will be
sufficient for some things like the symbol tree or your plugin.

Jiri
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