CODEWITHSUNDEEP
regexctagsexuberant-ctags
ddreian
ddreian

Reputation: 1856

Multiline regex for ctags

I have some Java code

@Subscribe
public void catchEvent(SomeEvent

And I want to match it with something like this in my ~/.ctags

--langdef=javaspring
--langmap=javaspring:.java
--regex-javaspring=/@Subscribe(\s)*([a-z ]+)\s([a-zA-Z]*)\(([a-zA-Z]*)/\3-\4/

This should generate something like "catchEvent-SomeEvent" but it does not. If I remove the newline between @Subscribe and public void it gets it.

@Subscribe public void catchEvent(SomeEvent

rm -rf tags && ctags -R . && cat tags|grep Subs
catchEvent-SomeEvent    PathToMyFile.java    /^@Subscribe public void catchEvent(SomeEvent event) {$/;"      r

I even tried using begin/end of line like this

--regex-javaspring=/^\s*@Subscribe[a-z \s]+\s([a-zA-Z]+)\(([a-zA-Z]+).*$/@Subscribe \1 \2*/

Do you have any idea if I can do this with the current ctag implementation. Am I doing something wrong or ctags does not support multi-line regex now.

Thank you!

Upvotes: 5

Views: 925

Answers (1)

Vivian De Smedt
Vivian De Smedt

Reputation: 1029

For Universal Ctags you can use the --mline-regex-<LANG> feature with the {mgroup=1} option:

--mline-regex-javaspring=/^\s*@Subscribe[a-z \s]+\s([a-zA-Z]+)\(([a-zA-Z]+).*$/@Subscribe \1 \2*/{mgroup=1}

The mgroup option is necessary to tell Ctags how to determine the line number of the expression.

Upvotes: 2

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