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annotate runtime/indent/rust.vim @ 19940:724417668d42 v8.2.0526

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patch 8.2.0526: Gcc 9 complains about empty statement Commit: https://github.com/vim/vim/commit/86b9a3e8cd24335195dbe377b98bed1ba291268d Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 7 19:57:29 2020 +0200 patch 8.2.0526: Gcc 9 complains about empty statement Problem: Gcc 9 complains about empty statement. Solution: Add {}. (Dominique Pelle, closes https://github.com/vim/vim/issues/5894)
author Bram Moolenaar <Bram@vim.org>
date Tue, 07 Apr 2020 20:00:04 +0200
parents 63b0b7b79b25
children 2ff007677dba
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 " Vim indent file
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2 " Language: Rust
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3 " Author: Chris Morgan <me@chrismorgan.info>
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4 " Last Change: 2017 Jun 13
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5 " For bugs, patches and license go to https://github.com/rust-lang/rust.vim
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6
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7 " Only load this indent file when no other was loaded.
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8 if exists("b:did_indent")
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9 finish
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10 endif
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11 let b:did_indent = 1
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12
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13 setlocal cindent
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14 setlocal cinoptions=L0,(0,Ws,J1,j1
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15 setlocal cinkeys=0{,0},!^F,o,O,0[,0]
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16 " Don't think cinwords will actually do anything at all... never mind
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17 setlocal cinwords=for,if,else,while,loop,impl,mod,unsafe,trait,struct,enum,fn,extern
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18
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19 " Some preliminary settings
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20 setlocal nolisp " Make sure lisp indenting doesn't supersede us
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21 setlocal autoindent " indentexpr isn't much help otherwise
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22 " Also do indentkeys, otherwise # gets shoved to column 0 :-/
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23 setlocal indentkeys=0{,0},!^F,o,O,0[,0]
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24
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25 setlocal indentexpr=GetRustIndent(v:lnum)
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26
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27 " Only define the function once.
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28 if exists("*GetRustIndent")
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29 finish
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30 endif
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31
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32 let s:save_cpo = &cpo
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33 set cpo&vim
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34
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35 " Come here when loading the script the first time.
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36
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37 function! s:get_line_trimmed(lnum)
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38 " Get the line and remove a trailing comment.
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39 " Use syntax highlighting attributes when possible.
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40 " NOTE: this is not accurate; /* */ or a line continuation could trick it
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41 let line = getline(a:lnum)
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42 let line_len = strlen(line)
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43 if has('syntax_items')
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44 " If the last character in the line is a comment, do a binary search for
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45 " the start of the comment. synID() is slow, a linear search would take
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46 " too long on a long line.
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47 if synIDattr(synID(a:lnum, line_len, 1), "name") =~ 'Comment\|Todo'
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48 let min = 1
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49 let max = line_len
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50 while min < max
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51 let col = (min + max) / 2
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52 if synIDattr(synID(a:lnum, col, 1), "name") =~ 'Comment\|Todo'
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53 let max = col
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54 else
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55 let min = col + 1
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56 endif
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57 endwhile
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58 let line = strpart(line, 0, min - 1)
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59 endif
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60 return substitute(line, "\s*$", "", "")
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61 else
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62 " Sorry, this is not complete, nor fully correct (e.g. string "//").
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63 " Such is life.
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64 return substitute(line, "\s*//.*$", "", "")
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65 endif
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66 endfunction
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67
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68 function! s:is_string_comment(lnum, col)
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69 if has('syntax_items')
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70 for id in synstack(a:lnum, a:col)
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71 let synname = synIDattr(id, "name")
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72 if synname == "rustString" || synname =~ "^rustComment"
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73 return 1
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74 endif
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75 endfor
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76 else
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77 " without syntax, let's not even try
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78 return 0
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79 endif
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80 endfunction
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81
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82 function GetRustIndent(lnum)
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83
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84 " Starting assumption: cindent (called at the end) will do it right
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85 " normally. We just want to fix up a few cases.
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86
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87 let line = getline(a:lnum)
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88
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89 if has('syntax_items')
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90 let synname = synIDattr(synID(a:lnum, 1, 1), "name")
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91 if synname == "rustString"
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92 " If the start of the line is in a string, don't change the indent
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93 return -1
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94 elseif synname =~ '\(Comment\|Todo\)'
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95 \ && line !~ '^\s*/\*' " not /* opening line
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96 if synname =~ "CommentML" " multi-line
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97 if line !~ '^\s*\*' && getline(a:lnum - 1) =~ '^\s*/\*'
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98 " This is (hopefully) the line after a /*, and it has no
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99 " leader, so the correct indentation is that of the
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100 " previous line.
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101 return GetRustIndent(a:lnum - 1)
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102 endif
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103 endif
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104 " If it's in a comment, let cindent take care of it now. This is
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105 " for cases like "/*" where the next line should start " * ", not
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106 " "* " as the code below would otherwise cause for module scope
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107 " Fun fact: " /*\n*\n*/" takes two calls to get right!
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108 return cindent(a:lnum)
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109 endif
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110 endif
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111
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112 " cindent gets second and subsequent match patterns/struct members wrong,
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113 " as it treats the comma as indicating an unfinished statement::
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114 "
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115 " match a {
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116 " b => c,
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117 " d => e,
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118 " f => g,
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119 " };
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120
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121 " Search backwards for the previous non-empty line.
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122 let prevlinenum = prevnonblank(a:lnum - 1)
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123 let prevline = s:get_line_trimmed(prevlinenum)
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124 while prevlinenum > 1 && prevline !~ '[^[:blank:]]'
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125 let prevlinenum = prevnonblank(prevlinenum - 1)
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126 let prevline = s:get_line_trimmed(prevlinenum)
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127 endwhile
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128
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129 " Handle where clauses nicely: subsequent values should line up nicely.
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130 if prevline[len(prevline) - 1] == ","
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131 \ && prevline =~# '^\s*where\s'
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132 return indent(prevlinenum) + 6
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133 endif
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134
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135 if prevline[len(prevline) - 1] == ","
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136 \ && s:get_line_trimmed(a:lnum) !~ '^\s*[\[\]{}]'
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137 \ && prevline !~ '^\s*fn\s'
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138 \ && prevline !~ '([^()]\+,$'
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139 \ && s:get_line_trimmed(a:lnum) !~ '^\s*\S\+\s*=>'
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140 " Oh ho! The previous line ended in a comma! I bet cindent will try to
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141 " take this too far... For now, let's normally use the previous line's
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142 " indent.
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143
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144 " One case where this doesn't work out is where *this* line contains
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145 " square or curly brackets; then we normally *do* want to be indenting
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146 " further.
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147 "
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148 " Another case where we don't want to is one like a function
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149 " definition with arguments spread over multiple lines:
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150 "
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151 " fn foo(baz: Baz,
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152 " baz: Baz) // <-- cindent gets this right by itself
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153 "
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154 " Another case is similar to the previous, except calling a function
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155 " instead of defining it, or any conditional expression that leaves
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156 " an open paren:
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157 "
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158 " foo(baz,
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159 " baz);
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160 "
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161 " if baz && (foo ||
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162 " bar) {
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163 "
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164 " Another case is when the current line is a new match arm.
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165 "
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166 " There are probably other cases where we don't want to do this as
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167 " well. Add them as needed.
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168 return indent(prevlinenum)
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169 endif
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170
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171 if !has("patch-7.4.355")
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172 " cindent before 7.4.355 doesn't do the module scope well at all; e.g.::
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173 "
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174 " static FOO : &'static [bool] = [
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175 " true,
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176 " false,
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177 " false,
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178 " true,
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179 " ];
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180 "
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181 " uh oh, next statement is indented further!
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182
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183 " Note that this does *not* apply the line continuation pattern properly;
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184 " that's too hard to do correctly for my liking at present, so I'll just
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185 " start with these two main cases (square brackets and not returning to
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186 " column zero)
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187
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188 call cursor(a:lnum, 1)
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189 if searchpair('{\|(', '', '}\|)', 'nbW',
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190 \ 's:is_string_comment(line("."), col("."))') == 0
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191 if searchpair('\[', '', '\]', 'nbW',
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192 \ 's:is_string_comment(line("."), col("."))') == 0
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193 " Global scope, should be zero
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194 return 0
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195 else
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196 " At the module scope, inside square brackets only
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197 "if getline(a:lnum)[0] == ']' || search('\[', '', '\]', 'nW') == a:lnum
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198 if line =~ "^\\s*]"
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199 " It's the closing line, dedent it
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200 return 0
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201 else
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202 return shiftwidth()
11229
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203 endif
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204 endif
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205 endif
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206 endif
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207
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208 " Fall back on cindent, which does it mostly right
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209 return cindent(a:lnum)
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210 endfunction
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211
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212 let &cpo = s:save_cpo
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213 unlet s:save_cpo