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Diffstat (limited to 'indent/rust.vim')
| -rw-r--r-- | indent/rust.vim | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/indent/rust.vim b/indent/rust.vim index 5f5c74b9..042e2ab5 100644 --- a/indent/rust.vim +++ b/indent/rust.vim @@ -1,220 +1,3 @@ -if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1 - -" Vim indent file -" Language: Rust -" Author: Chris Morgan <me@chrismorgan.info> -" Last Change: 2017 Jun 13 -" 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) - -" 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 - - 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 - -endif if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'rust') == -1 " Vim indent file |