mirror of
https://github.com/neovim/neovim.git
synced 2024-12-20 19:25:11 -07:00
ae7ab90159
runtime: Set b:undo_indent where missing (vim/vim#12944)
0382f05dbd
Co-authored-by: dkearns <dougkearns@gmail.com>
233 lines
6.9 KiB
VimL
233 lines
6.9 KiB
VimL
" Vim indent file
|
|
" Language: Rust
|
|
" Author: Chris Morgan <me@chrismorgan.info>
|
|
" Last Change: 2017 Jun 13
|
|
" 2023 Aug 28 by Vim Project (undo_indent)
|
|
" For bugs, patches and license go to https://github.com/rust-lang/rust.vim
|
|
|
|
" Only load this indent file when no other was loaded.
|
|
if exists("b:did_indent")
|
|
finish
|
|
endif
|
|
let b:did_indent = 1
|
|
|
|
setlocal cindent
|
|
setlocal cinoptions=L0,(0,Ws,J1,j1
|
|
setlocal cinkeys=0{,0},!^F,o,O,0[,0]
|
|
" Don't think cinwords will actually do anything at all... never mind
|
|
setlocal cinwords=for,if,else,while,loop,impl,mod,unsafe,trait,struct,enum,fn,extern
|
|
|
|
" Some preliminary settings
|
|
setlocal nolisp " Make sure lisp indenting doesn't supersede us
|
|
setlocal autoindent " indentexpr isn't much help otherwise
|
|
" Also do indentkeys, otherwise # gets shoved to column 0 :-/
|
|
setlocal indentkeys=0{,0},!^F,o,O,0[,0]
|
|
|
|
setlocal indentexpr=GetRustIndent(v:lnum)
|
|
|
|
let b:undo_indent = "setlocal cindent< cinoptions< cinkeys< cinwords< lisp< autoindent< indentkeys< indentexpr<"
|
|
|
|
" Only define the function once.
|
|
if exists("*GetRustIndent")
|
|
finish
|
|
endif
|
|
|
|
let s:save_cpo = &cpo
|
|
set cpo&vim
|
|
|
|
" Come here when loading the script the first time.
|
|
|
|
function! s:get_line_trimmed(lnum)
|
|
" Get the line and remove a trailing comment.
|
|
" Use syntax highlighting attributes when possible.
|
|
" NOTE: this is not accurate; /* */ or a line continuation could trick it
|
|
let line = getline(a:lnum)
|
|
let line_len = strlen(line)
|
|
if has('syntax_items')
|
|
" If the last character in the line is a comment, do a binary search for
|
|
" the start of the comment. synID() is slow, a linear search would take
|
|
" too long on a long line.
|
|
if synIDattr(synID(a:lnum, line_len, 1), "name") =~ 'Comment\|Todo'
|
|
let min = 1
|
|
let max = line_len
|
|
while min < max
|
|
let col = (min + max) / 2
|
|
if synIDattr(synID(a:lnum, col, 1), "name") =~ 'Comment\|Todo'
|
|
let max = col
|
|
else
|
|
let min = col + 1
|
|
endif
|
|
endwhile
|
|
let line = strpart(line, 0, min - 1)
|
|
endif
|
|
return substitute(line, "\s*$", "", "")
|
|
else
|
|
" Sorry, this is not complete, nor fully correct (e.g. string "//").
|
|
" Such is life.
|
|
return substitute(line, "\s*//.*$", "", "")
|
|
endif
|
|
endfunction
|
|
|
|
function! s:is_string_comment(lnum, col)
|
|
if has('syntax_items')
|
|
for id in synstack(a:lnum, a:col)
|
|
let synname = synIDattr(id, "name")
|
|
if synname == "rustString" || synname =~ "^rustComment"
|
|
return 1
|
|
endif
|
|
endfor
|
|
else
|
|
" without syntax, let's not even try
|
|
return 0
|
|
endif
|
|
endfunction
|
|
|
|
function GetRustIndent(lnum)
|
|
|
|
" Starting assumption: cindent (called at the end) will do it right
|
|
" normally. We just want to fix up a few cases.
|
|
|
|
let line = getline(a:lnum)
|
|
|
|
if has('syntax_items')
|
|
let synname = synIDattr(synID(a:lnum, 1, 1), "name")
|
|
if synname == "rustString"
|
|
" If the start of the line is in a string, don't change the indent
|
|
return -1
|
|
elseif synname =~ '\(Comment\|Todo\)'
|
|
\ && line !~ '^\s*/\*' " not /* opening line
|
|
if synname =~ "CommentML" " multi-line
|
|
if line !~ '^\s*\*' && getline(a:lnum - 1) =~ '^\s*/\*'
|
|
" This is (hopefully) the line after a /*, and it has no
|
|
" leader, so the correct indentation is that of the
|
|
" previous line.
|
|
return GetRustIndent(a:lnum - 1)
|
|
endif
|
|
endif
|
|
" If it's in a comment, let cindent take care of it now. This is
|
|
" for cases like "/*" where the next line should start " * ", not
|
|
" "* " as the code below would otherwise cause for module scope
|
|
" Fun fact: " /*\n*\n*/" takes two calls to get right!
|
|
return cindent(a:lnum)
|
|
endif
|
|
endif
|
|
|
|
" cindent gets second and subsequent match patterns/struct members wrong,
|
|
" as it treats the comma as indicating an unfinished statement::
|
|
"
|
|
" match a {
|
|
" b => c,
|
|
" d => e,
|
|
" f => g,
|
|
" };
|
|
|
|
" Search backwards for the previous non-empty line.
|
|
let prevlinenum = prevnonblank(a:lnum - 1)
|
|
let prevline = s:get_line_trimmed(prevlinenum)
|
|
while prevlinenum > 1 && prevline !~ '[^[:blank:]]'
|
|
let prevlinenum = prevnonblank(prevlinenum - 1)
|
|
let prevline = s:get_line_trimmed(prevlinenum)
|
|
endwhile
|
|
|
|
" Handle where clauses nicely: subsequent values should line up nicely.
|
|
if prevline[len(prevline) - 1] == ","
|
|
\ && prevline =~# '^\s*where\s'
|
|
return indent(prevlinenum) + 6
|
|
endif
|
|
|
|
"match newline after struct with generic bound like
|
|
"struct SomeThing<T>
|
|
"| <-- newline indent should same as prevline
|
|
if prevline[len(prevline) - 1] == ">"
|
|
\ && prevline =~# "\s*struct.*>$"
|
|
return indent(prevlinenum)
|
|
endif
|
|
|
|
"match newline after where like:
|
|
"struct SomeThing<T>
|
|
"where
|
|
" T: Display,
|
|
if prevline =~# '^\s*where$'
|
|
return indent(prevlinenum) + 4
|
|
endif
|
|
|
|
if prevline[len(prevline) - 1] == ","
|
|
\ && s:get_line_trimmed(a:lnum) !~ '^\s*[\[\]{}]'
|
|
\ && prevline !~ '^\s*fn\s'
|
|
\ && prevline !~ '([^()]\+,$'
|
|
\ && s:get_line_trimmed(a:lnum) !~ '^\s*\S\+\s*=>'
|
|
" Oh ho! The previous line ended in a comma! I bet cindent will try to
|
|
" take this too far... For now, let's normally use the previous line's
|
|
" indent.
|
|
|
|
" One case where this doesn't work out is where *this* line contains
|
|
" square or curly brackets; then we normally *do* want to be indenting
|
|
" further.
|
|
"
|
|
" Another case where we don't want to is one like a function
|
|
" definition with arguments spread over multiple lines:
|
|
"
|
|
" fn foo(baz: Baz,
|
|
" baz: Baz) // <-- cindent gets this right by itself
|
|
"
|
|
" Another case is similar to the previous, except calling a function
|
|
" instead of defining it, or any conditional expression that leaves
|
|
" an open paren:
|
|
"
|
|
" foo(baz,
|
|
" baz);
|
|
"
|
|
" if baz && (foo ||
|
|
" bar) {
|
|
"
|
|
" Another case is when the current line is a new match arm.
|
|
"
|
|
" There are probably other cases where we don't want to do this as
|
|
" well. Add them as needed.
|
|
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
|
|
return cindent(a:lnum)
|
|
endfunction
|
|
|
|
let &cpo = s:save_cpo
|
|
unlet s:save_cpo
|