* Help with tree-sitter imenu settings.
@ 2023-12-13 13:43 Aleksandr Vityazev
2023-12-14 11:03 ` Aleksandr Vityazev
0 siblings, 1 reply; 2+ messages in thread
From: Aleksandr Vityazev @ 2023-12-13 13:43 UTC (permalink / raw)
To: help-gnu-emacs
Hi,
I'm writing a mode for devicetree with tree-sitter support, but I'm
having trouble with defining NAME-FN for treesit-simple-imenu-settings.
here is part of the syntax tree for example.dts:
(node name: (identifier) address: @ address: (unit_address) { ...
With (treesit-node-child-by-field-name node "name") I can get
name. With (treesit-node-child-by-field-name node "address")
I can get first address which is "@". But how to get a second one?
example.dts
#+begin_example dts
/dts-v1/;
/ {
soc {
flash_controller: flash-controller@4001e000 {
reg = <0x4001e000 0x1000>;
flash0: flash@0 {
label = "SOC_FLASH";
erase-block = <4096>;
};
};
};
};
#+end_example
using treesit-explore-mode I get this syntax tree
#+begin_example syntax tree
(document
(file_version /dts-v1/ ;)
(node name: (identifier) {
(node name: (identifier) {
(labeled_item label: (identifier) :
item:
(node name: (identifier) address: @ address: (unit_address) {
(property name: (identifier) =
value: (integer_cells < (integer_literal) (integer_literal) >)
;)
(labeled_item label: (identifier) :
item:
(node name: (identifier) address: @ address: (unit_address) {
(property name: (identifier) =
value: (string_literal " ")
;)
(property name: (identifier) =
value: (integer_cells < (integer_literal) >)
;)
} ;))
} ;))
} ;)
} ;))
#+end_example
treesit-simple-imenu-settings is:
#+begin_src elisp
(setq-local treesit-simple-imenu-settings
`((nil "\\`node\\'"
nil devicetree-ts--mode--name-function)))
#+end_src
where devicetree-ts--mode--name-function is:
#+begin_src elisp
(defun devicetree-ts--mode--name-function (node)
"Return name of NODE to use for in imenu."
(let ((name (treesit-node-child-by-field-name node "name"))
(address (treesit-node-child-by-field-name node "address")))
(if address
(concat (treesit-node-text name t)
(treesit-node-text address t))
(treesit-node-text name t))))
#+end_src
Imenu will look like this
#+begin_src
/
//soc
//soc/flash-controller@
//soc/flash-controller@ flash@
#+end_src
But I want it to look like this:
#+begin_example
/
//soc
//soc/flash-controller@4001e000
//soc/flash-controller@4001e000 flash@0
#+end_example
--
Best regards,
Aleksandr Vityazev
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