Vim with ACK: Search for all #pragma not ending in once

Question

Using ACK in Vim, I want to find all instances of #pragma that does not end in once within C++ related files. What is the regex I need to use?

#pragma\s+.*(?<!once)$ works in Python and JavaScript, but I'm not sure how to get ACK to accept it.

:Ack --cpp #pragma\s+.*(?<!once)$ produces the following error in Vim:

E194: No alternate file name to substitute for '#'

Escaping the # with \\\ returns nothing. I have tried a few other modifications, but I'm not getting what I want.

Yes grep returned nothing as well. I guess I could expand the question to "or grep". — Matthew Hoggan, Aug 13 '15 at 23:06

score 1 · Accepted Answer · answered Aug 14 '15 at 00:49

1

You need to escape # and the ! with a single backslash.

e.g.

:!ack-grep --cpp '\#pragma\s+.*(?<\!once)$'

I am unsure if :Ack runs the same in the background.

answered Aug 14 '15 at 00:49

1 Answers1