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How to get function definition file and line?

#function
fchabouis

fchabouis

How to get function definition file and line?

I would like to know if there is a way, in a mix project, to get information about where a function is defined?
I would like, given a module name and function name, to know that this function is defined line 8 of foo.ex file. I guess it is possible to find information like this, as we get lines number when running tests or for compiler warnings.
Thanks!

10 comments
#function
19 1556 10

Marked As Solved

fchabouis

fchabouis

Thanks, I have all the information I need :heart:
Phoenix.Router.route_info to know which module + function is called
module.module_info() for the source file path
Code.fetch_docs/1 for the line number

3
Post #8

Also Liked

hauleth

hauleth

It is in the metadata of module itself. Just check out module.module_info().

4
Post #7
fchabouis

fchabouis

@ambareesha7 No blog post, but I made a PR on Phoenix that just got merged!
https://github.com/phoenixframework/phoenix/pull/4748

4
Post #10
hauleth

hauleth

You can try to extract that information from the Code.fetch_docs/1. It will not always be 100% precise (as if there is documentation, then it will point to the line for documentation), but works well enough, especially in presence of multiple heads.

3
Post #4

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