Commit: runtime(rust): clean-up indent script, handle opening empty line correctly

[Christian Brabandt]

runtime(rust): clean-up indent script, handle opening empty line correctly

Commit: https://github.com/vim/vim/commit/e426245bb38fbafb504d8bf9f327a28c2785897c
Author: Christian Brabandt <c...@256bit.org>
Date: Sun Dec 28 13:57:33 2025 +0000

runtime(rust): clean-up indent script, handle opening empty line correctly

fixes: https://github.com/vim/vim/issues/18974

Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/indent/rust.vim b/runtime/indent/rust.vim
index a96650d41..2a660bcc7 100644
--- a/runtime/indent/rust.vim
+++ b/runtime/indent/rust.vim
@@ -2,7 +2,8 @@
" Language: Rust
" Author: Chris Morgan <m...@chrismorgan.info>
" Last Change: 2023-09-11
-" 2024 Jul 04 by Vim Project: use shiftwidth() instead of hard-coding shifted values (#15138)
+" 2024 Jul 04 by Vim Project: use shiftwidth() instead of hard-coding shifted values #15138
+" 2025 Dec 28 by Vim Project: clean up, handle opening empty line correctly #18974

" For bugs, patches and license go to https://github.com/rust-lang/rust.vim
" Note: upstream seems umaintained: https://github.com/rust-lang/rust.vim/issues/502
@@ -86,16 +87,6 @@ function! s:is_string_comment(lnum, col)
endif
endfunction

-if exists('*shiftwidth')
- function! s:shiftwidth()
- return shiftwidth()
- endfunc
-else
- function! s:shiftwidth()
- return &shiftwidth
- endfunc
-endif
-
function GetRustIndent(lnum)
" Starting assumption: cindent (called at the end) will do it right
" normally. We just want to fix up a few cases.
@@ -240,44 +231,10 @@ function GetRustIndent(lnum)
return indent(prevlinenum)
endif

- if !has("patch-7.4.355")
- " cindent before 7.4.355 doesn't do the module scope well at all; e.g.::
- "
- " static FOO : &'static [bool] = [
- " true,
- " false,
- " false,
- " true,
- " ];
- "
- " uh oh, next statement is indented further!
-
- " Note that this does *not* apply the line continuation pattern properly;
- " that's too hard to do correctly for my liking at present, so I'll just
- " start with these two main cases (square brackets and not returning to
- " column zero)
-
- call cursor(a:lnum, 1)
- if searchpair('{\|(', '', '}\|)', 'nbW',
- \ 's:is_string_comment(line("."), col("."))') == 0
- if searchpair('\[', '', '\]', 'nbW',
- \ 's:is_string_comment(line("."), col("."))') == 0
- " Global scope, should be zero
- return 0
- else
- " At the module scope, inside square brackets only
- "if getline(a:lnum)[0] == ']' || search('\[', '', '\]', 'nW') == a:lnum
- if line =~# "^\s*]"
- " It's the closing line, dedent it
- return 0
- else
- return shiftwidth()
- endif
- endif
- endif
- endif
-
" Fall back on cindent, which does it mostly right
+ if empty(trim(line))
+ return cindent(prevlinenum)
+ endif
return cindent(a:lnum)
endfunction