[vim/vim] cmdline: complete user :K* via ":k..." when 'ignorecase' (PR #20275)

mattn

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May 21, 2026, 12:22:07 AM (yesterday) May 21

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With 'ignorecase' set, :gz<Tab> completes to a user command :Gz, but :kz<Tab> does not reach a user command :Kz. This is because set_cmd_index() short-circuits any :k<X> as :k {X} (the mark argument) before command-name expansion runs.

Skip the short-circuit when p_ic is set so the input flows through the normal command-name expansion path. Default behaviour (noignorecase) is unchanged, so Test_cmdline_complete_various and Test_fuzzy_completion_cmd_k still pass.

A regression test is added that covers both noignorecase and ignorecase.

Fixes #20241

You can view, comment on, or merge this pull request online at:

https://github.com/vim/vim/pull/20275

Commit Summary

7843b83 cmdline completion: complete user :K* via ":k..." when ignorecase

File Changes

(2 files)

M src/cmdexpand.c (8)
M src/testdir/test_cmdline.vim (21)

Patch Links:

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zeertzjq

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May 21, 2026, 1:30:41 AM (yesterday) May 21

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@zeertzjq commented on this pull request.

In src/cmdexpand.c:

> @@ -1759,11 +1759,11 @@ set_cmd_index(char_u *cmd, exarg_T *eap, expand_T *xp, int *complp)
     // Isolate the command and search for it in the command table.
     // Exceptions:
     // - the 'k' command can directly be followed by any character, but do
-    // accept "keepmarks", "keepalt" and "keepjumps". As fuzzy matching can
-    // find matches anywhere in the command name, do this only for command
-    // expansion based on regular expression and not for fuzzy matching.
+    // accept "keepmarks", "keepalt" and "keepjumps". Bypass also when
+    // 'ignorecase' is set so a lowercase ":kz" still completes a user
+    // command like :Kz (#20241), and for fuzzy matching as before.

⬇️ Suggested change

-    // command like :Kz (#20241), and for fuzzy matching as before.
+    // command like :Kz (#20241), and for fuzzy matching as that can find
+    // matches anywhere in the command name.

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mattn

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May 21, 2026, 1:37:16 AM (yesterday) May 21

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@mattn pushed 1 commit.

6d1643d Update src/cmdexpand.c

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mattn

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May 21, 2026, 1:37:54 AM (yesterday) May 21

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mattn left a comment (vim/vim#20275)

@zeertzjq Right, thank you

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Christian Brabandt

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May 21, 2026, 3:56:46 PM (18 hours ago) May 21

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chrisbra left a comment (vim/vim#20275)

thanks both 🙇‍♂️

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Christian Brabandt

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May 21, 2026, 4:05:19 PM (17 hours ago) May 21

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Closed #20275 via b54e57e.

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