Finding function declarations

[iulian3144]

I would like to find function declarations only but it seems that weggli does not support this at the moment.

What I have tried:
$ weggli -R func=myFoo '_ $func(_);' .

If this is indeed not supported, an enhancement would be nice even though this may be a little out of scope for the tool (based on its description).

[arizvisa]

If you run weggli with verbosity turned on, your query is probably getting normalized into a compound_statement. If you're looking for content outside of a compound_statement, you might be able to trim out that logic in parse_search_pattern (src/main.rs).

I'm not sure, but you also might need to anchor to a different tree-sitter-c rule which are those things listed in VALID_NODE_KINDS (src/main.rs). Weggli is anchoring to the definitions themselves, so declarations might be out of scope.

[iulian3144]

Just adding "declaration" in the VALID_NODE_KINDS makes it work. Thanks a lot for the hint, @arizvisa.
I can see why this behavior would not be desired by default but maybe it would be nice to at least have a flag that enables this.
I think that something like --list-kinds / --kinds (similar to ctags) would work great.

$ weggli --list-kinds
d declaration         [off]
p compound_statement  [on]
f function_definition [on]
s struct_specifier    [on]
e enum_specifier      [on]
u union_specifier     [on]
c class_specifier     [on]

$ weggli --kinds=+d-u --list-kinds
d declaration         [on]
p compound_statement  [on]
f function_definition [on]
s struct_specifier    [on]
e enum_specifier      [on]
u union_specifier     [off]
c class_specifier     [on]

[arizvisa]

Yeah, agreed. Having variable granularity on what's considered an anchor point when filtering your query is pretty useful.

Very cool that it worked out. I've had to patch it similarly so that I could chain queries together via sh pipeline ([definition|specifier] -> [declaration|expression]). Something like that anyways.

[felixwilhelm]

Thanks for the bug report and sorry for the slow response. I didn't have much time to work on weggli in the last weeks.

I think disabling the VALID_NODE_KINDS check + anchoring based on a flag would solve this. I'll take a stab at this, but it might take a bit before I find the time.