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I use matchit.vim and it works. Indeed I write a Fortran code and I can jump from IF to END IF pressing %. I'm trying to add the couple <+, > to b:match_words, adding

let b:match_words = b:match_words . '<+:>'

to my ~/.vimrc file, but I get errors E121 and E15 bout undefined variable b:match_words and invalid expression b:match_words . '<+:>', respectively.

If i change to

let b:match_words = '<+:>'

The error disappear, but obviously I cannot match anything else that this only pair.

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  • Have you tried let b:match_words += '<+:>'? I think the let is necessary to declare a variable modification. – statox Jul 18 '16 at 8:23
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    see also: stackoverflow.com/a/27549685/4082052 – Sundeep Jul 18 '16 at 8:28
  • Oh, I'm sorry, I forgot the let in the question but used it in the code; now I edit the question. – Enlico Jul 18 '16 at 8:45
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    Guys, string concatenation is ., not +. – Sato Katsura Jul 18 '16 at 8:51
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    Then try adding it to after/ftplugin/fortran.vim. – Sato Katsura Jul 18 '16 at 9:27
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You want to extend matchit's default b:match_words, so you'll have to to wait for it to be initialised first. The docs make reference to setting it from ftplugins, so the solution is to add

let b:match_words .= ',<+:>'

to a file after/ftplugin/fortran.vim. That's about all there is to it.

On a side note: beware that <+ and > above are actually regexps. This is important if you want to add more pairs to b:match_words.

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  • Do you mean that the pair I added should always be the last one? – Enlico Jul 18 '16 at 10:45
  • @EnricoMariaDeAngelis I'm not sure I understand your point. The pair you're adding is the last, yes. How / why does that matter? – Sato Katsura Jul 18 '16 at 11:08
  • If I were going to add a pair, I would simply do let b:match_words .= ',<+:>,hello:goodby'. What's the problem with this new pair? (I supposed it is the order..) – Enlico Jul 18 '16 at 12:19
  • @EnricoMariaDeAngelis There is nothing wrong with adding a new pair. What problem are you trying to solve? – Sato Katsura Jul 18 '16 at 13:41
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    matchit treats them as regexps. If you want f.i. [:] you should write that as \[:\]. If you want item*:enditem* you need to write it as item\*:enditem\*. And so on. – Sato Katsura Jul 18 '16 at 14:03

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