eiffel.vim (3317B)
1 " Vim indent file 2 " Language: Eiffel 3 " Maintainer: Jocelyn Fiat <jfiat@eiffel.com> 4 " Previous-Maintainer: David Clarke <gadicath@dishevelled.net> 5 " Contributions from: Takuya Fujiwara 6 " Contributions from: Thilo Six 7 " $Date: 2017/03/08 06:00:00 $ 8 " $Revision: 1.4 $ 9 " URL: https://github.com/eiffelhub/vim-eiffel 10 11 " Only load this indent file when no other was loaded. 12 if exists("b:did_indent") 13 finish 14 endif 15 let b:did_indent = 1 16 17 setlocal indentexpr=GetEiffelIndent() 18 setlocal nolisp 19 setlocal nosmartindent 20 setlocal nocindent 21 setlocal autoindent 22 setlocal comments=:-- 23 setlocal indentkeys+==end,=else,=ensure,=require,=check,=loop,=until 24 setlocal indentkeys+==creation,=feature,=inherit,=class,=is,=redefine,=rename,=variant 25 setlocal indentkeys+==invariant,=do,=local,=export 26 27 let b:undo_indent = "setl smartindent< indentkeys< indentexpr< autoindent< comments< " 28 29 " Define some stuff 30 " keywords grouped by indenting 31 let s:trust_user_indent = '\(+\)\(\s*\(--\).*\)\=$' 32 let s:relative_indent = '^\s*\(deferred\|class\|feature\|creation\|inherit\|loop\|from\|across\|until\|if\|else\|elseif\|ensure\|require\|check\|do\|local\|invariant\|variant\|rename\|redefine\|do\|export\)\>' 33 let s:outdent = '^\s*\(else\|invariant\|variant\|do\|require\|until\|loop\|local\)\>' 34 let s:no_indent = '^\s*\(class\|feature\|creation\|inherit\)\>' 35 let s:single_dent = '^[^-]\+[[:alnum:]]\+ is\(\s*\(--\).*\)\=$' 36 let s:inheritance_dent = '\s*\(redefine\|rename\|export\)\>' 37 38 39 " Only define the function once. 40 if exists("*GetEiffelIndent") 41 finish 42 endif 43 44 let s:keepcpo= &cpo 45 set cpo&vim 46 47 function GetEiffelIndent() 48 49 " Eiffel Class indenting 50 " 51 " Find a non-blank line above the current line. 52 let lnum = prevnonblank(v:lnum - 1) 53 54 " At the start of the file use zero indent. 55 if lnum == 0 56 return 0 57 endif 58 59 " trust the user's indenting 60 if getline(lnum) =~ s:trust_user_indent 61 return -1 62 endif 63 64 " Add a 'shiftwidth' after lines that start with an indent word 65 let ind = indent(lnum) 66 if getline(lnum) =~ s:relative_indent 67 let ind = ind + shiftwidth() 68 endif 69 70 " Indent to single indent 71 if getline(v:lnum) =~ s:single_dent && getline(v:lnum) !~ s:relative_indent 72 \ && getline(v:lnum) !~ '\s*\<\(and\|or\|implies\)\>' 73 let ind = shiftwidth() 74 endif 75 76 " Indent to double indent 77 if getline(v:lnum) =~ s:inheritance_dent 78 let ind = 2 * shiftwidth() 79 endif 80 81 " Indent line after the first line of the function definition 82 if getline(lnum) =~ s:single_dent 83 let ind = ind + shiftwidth() 84 endif 85 86 " The following should always be at the start of a line, no indenting 87 if getline(v:lnum) =~ s:no_indent 88 let ind = 0 89 endif 90 91 " Subtract a 'shiftwidth', if this isn't the first thing after the 'is' 92 " or first thing after the 'do' 93 if getline(v:lnum) =~ s:outdent && getline(v:lnum - 1) !~ s:single_dent 94 \ && getline(v:lnum - 1) !~ '^\s*do\>' 95 let ind = ind - shiftwidth() 96 endif 97 98 " Subtract a shiftwidth for end statements 99 if getline(v:lnum) =~ '^\s*end\>' 100 let ind = ind - shiftwidth() 101 endif 102 103 " set indent of zero end statements that are at an indent of 3, this should 104 " only ever be the class's end. 105 if getline(v:lnum) =~ '^\s*end\>' && ind == shiftwidth() 106 let ind = 0 107 endif 108 109 return ind 110 endfunction 111 112 let &cpo = s:keepcpo 113 unlet s:keepcpo 114 115 " vim:sw=2