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7
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1 " Vim indent file
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20
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2 " Language: OCaml
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3 " Maintainers: Jean-Francois Yuen <jfyuen@happycoders.org>
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4 " Mike Leary <leary@nwlink.com>
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5 " Markus Mottl <markus@oefai.at>
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6 " URL: http://www.oefai.at/~markus/vim/indent/ocaml.vim
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7 " Last Change: 2004 Apr 11 - Added indent for 'class' (JY)
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8 " 2003 Sep 16 - Added 'private' as keyword (JY)
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9 " 2003 Mar 29 - Fixed bug with 'if' and 'else' (JY)
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7
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10
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11 " Only load this indent file when no other was loaded.
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12 if exists("b:did_indent")
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13 finish
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14 endif
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15 let b:did_indent = 1
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16
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17 setlocal expandtab
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18 setlocal indentexpr=GetOCamlIndent()
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20
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19 setlocal indentkeys+=0=and,0=class,0=constraint,0=done,0=else,0=end,0=exception,0=external,0=if,0=in,0=include,0=inherit,0=initializer,0=let,0=method,0=open,0=then,0=type,0=val,0=with,0;;,0>\],0\|\],0>},0\|,0},0\],0)
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7
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20 setlocal nolisp
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21 setlocal nosmartindent
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22 setlocal textwidth=80
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23
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24 " Comment formatting
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25 if (has("comments"))
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26 setlocal comments=sr:(*,mb:*,ex:*)
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27 setlocal fo=cqort
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28 endif
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29
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30 " Only define the function once.
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31 if exists("*GetOCamlIndent")
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32 finish
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33 endif
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34
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35 " Define some patterns:
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20
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36 let s:beflet = '^\s*\(initializer\|method\|try\)\|\(\<\(begin\|do\|else\|in\|then\|try\)\|->\|<-\|=\|;\|(\)\s*$'
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7
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37 let s:letpat = '^\s*\(let\|type\|module\|class\|open\|exception\|val\|include\|external\)\>'
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38 let s:letlim = '\(\<\(sig\|struct\)\|;;\)\s*$'
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39 let s:lim = '^\s*\(exception\|external\|include\|let\|module\|open\|type\|val\)\>'
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40 let s:module = '\<\%(begin\|sig\|struct\|object\)\>'
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41 let s:obj = '^\s*\(constraint\|inherit\|initializer\|method\|val\)\>\|\<\(object\|object\s*(.*)\)\s*$'
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20
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42 let s:type = '^\s*\%(class\|let\|type\)\>.*='
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7
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43
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44 " Skipping pattern, for comments
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45 function s:SkipPattern(lnum, pat)
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46 let def = prevnonblank(a:lnum - 1)
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47 while def > 0 && getline(def) =~ a:pat
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48 let def = prevnonblank(def - 1)
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49 endwhile
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50 return def
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51 endfunction
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52
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53 " Indent for ';;' to match multiple 'let'
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54 function s:GetInd(lnum, pat, lim)
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55 let llet = search(a:pat, 'bW')
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56 let old = indent(a:lnum)
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57 while llet > 0
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58 let old = indent(llet)
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59 let nb = s:SkipPattern(llet, '^\s*(\*.*\*)\s*$')
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60 if getline(nb) =~ a:lim
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61 return old
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62 endif
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63 let llet = search(a:pat, 'bW')
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64 endwhile
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65 return old
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66 endfunction
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67
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68 " Indent pairs
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69 function s:FindPair(pstart, pmid, pend)
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70 call search(a:pend, 'bW')
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71 return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
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72 endfunction
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73
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74 " Indent 'let'
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75 function s:FindLet(pstart, pmid, pend)
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76 call search(a:pend, 'bW')
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20
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77 return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") =~ "^\\s*let\\>.*=.*\\<in\\s*$" || getline(prevnonblank(".") - 1) =~ s:beflet'))
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7
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78 endfunction
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79
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80 function GetOCamlIndent()
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81 " Find a non-blank line above the current line.
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82 let lnum = prevnonblank(v:lnum - 1)
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83
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84 " At the start of the file use zero indent.
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85 if lnum == 0
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86 return 0
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87 endif
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88
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89 let ind = indent(lnum)
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90 let lline = getline(lnum)
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91
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92 " Return double 'shiftwidth' after lines matching:
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93 if lline =~ '^\s*|.*->\s*$'
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94 return ind + &sw + &sw
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95 endif
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96
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97 let line = getline(v:lnum)
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98
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20
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99 " Indent if current line begins with 'end':
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7
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100 if line =~ '^\s*end\>'
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101 return s:FindPair(s:module, '','\<end\>')
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102
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103 " Indent if current line begins with 'done' for 'do':
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104 elseif line =~ '^\s*done\>'
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105 return s:FindPair('\<do\>', '','\<done\>')
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106
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107 " Indent if current line begins with '}' or '>}':
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108 elseif line =~ '^\s*\(\|>\)}'
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109 return s:FindPair('{', '','}')
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110
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111 " Indent if current line begins with ']', '|]' or '>]':
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112 elseif line =~ '^\s*\(\||\|>\)\]'
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113 return s:FindPair('\[', '','\]')
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114
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115 " Indent if current line begins with ')':
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116 elseif line =~ '^\s*)'
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117 return s:FindPair('(', '',')')
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118
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119 " Indent if current line begins with 'let':
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120 elseif line =~ '^\s*let\>'
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121 if lline !~ s:lim . '\|' . s:letlim . '\|' . s:beflet
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122 return s:FindLet(s:type, '','\<let\s*$')
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123 else return ind
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124 endif
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125
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126 " Indent if current line begins with 'class' or 'type':
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127 elseif line =~ '^\s*\(class\|type\)\>'
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128 if lline !~ s:lim . '\|\<and\s*$\|' . s:letlim
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129 return s:FindLet(s:type, '','\<\(class\|type\)\s*$')
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130 else return ind
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131 endif
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132
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133 " Indent for pattern matching:
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134 elseif line =~ '^\s*|'
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135 if lline !~ '^\s*\(|[^\]]\|\(match\|type\|with\)\>\)\|\<\(function\|parser\|private\|with\)\s*$'
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136 call search('|', 'bW')
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137 return indent(searchpair('^\s*\(match\|type\)\>\|\<\(function\|parser\|private\|with\)\s*$', '', '^\s*|', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") !~ "^\\s*|.*->"'))
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138 else return ind
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139 endif
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140
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141 " Indent if current line begins with ';;':
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142 elseif line =~ '^\s*;;'
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143 if lline !~ ';;\s*$'
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144 return s:GetInd(v:lnum, s:letpat, s:letlim)
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145 else return ind
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146 endif
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147
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20
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148 " Indent if current line begins with 'in':
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7
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149 elseif line =~ '^\s*in\>'
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150 if lline !~ '^\s*\(let\|and\)\>'
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151 return s:FindPair('\<let\>', '', '\<in\>')
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152 else return ind
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153 endif
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154
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155 " Indent if current line begins with 'else':
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7
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156 elseif line =~ '^\s*else\>'
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157 if lline !~ '^\s*\(if\|then\)\>'
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158 return s:FindPair('\<if\>', '', '\<else\>')
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159 else return ind
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160 endif
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161
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162 " Indent if current line begins with 'then':
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163 elseif line =~ '^\s*then\>'
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164 if lline !~ '^\s*\(if\|else\)\>'
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165 return s:FindPair('\<if\>', '', '\<then\>')
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166 else return ind
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167 endif
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168
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169 " Indent if current line begins with 'and':
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7
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170 elseif line =~ '^\s*and\>'
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171 if lline !~ '^\s*\(and\|let\|type\)\>\|\<end\s*$'
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172 return ind - &sw
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173 else return ind
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174 endif
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175
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176 " Indent if current line begins with 'with':
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7
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177 elseif line =~ '^\s*with\>'
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178 if lline !~ '^\s*\(match\|try\)\>'
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179 return s:FindPair('\<\%(match\|try\)\>', '','\<with\>')
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180 else return ind
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181 endif
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182
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183 " Indent if current line begins with 'exception':
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184 elseif line =~ '^\s*exception\>'
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185 if lline !~ s:lim . '\|' . s:letlim
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186 return indent(search('^\s*\(\(external\|include\|open\|type\)\>\|val\>.*:\)', 'bW'))
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187 else return ind
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188 endif
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189
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190 " Indent if current line begins with 'external':
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191 elseif line =~ '^\s*external\>'
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192 if lline !~ s:lim . '\|' . s:letlim
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193 return indent(search('^\s*\(\(exception\|external\|include\|open\|type\)\>\|val\>.*:\)', 'bW'))
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194 else return ind
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195 endif
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196
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197 " Indent if current line begins with 'include':
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198 elseif line =~ '^\s*include\>'
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199 if lline !~ s:lim . '\|' . s:letlim
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200 return indent(search('^\s*\(\(exception\|external\|open\|type\)\>\|val\>.*:\)', 'bW'))
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201 else return ind
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202 endif
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203
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204 " Indent if current line begins with 'open':
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205 elseif line =~ '^\s*open\>'
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206 if lline !~ s:lim . '\|' . s:letlim
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207 return indent(search('^\s*\(\(exception\|external\|include\|type\)\>\|val\>.*:\)', 'bW'))
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208 else return ind
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209 endif
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210
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211 " Indent if current line begins with 'val':
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212 elseif line =~ '^\s*val\>'
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213 if lline !~ '^\s*\(exception\|external\|include\|open\)\>\|' . s:obj . '\|' . s:letlim
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214 return indent(search('^\s*\(\(exception\|include\|initializer\|method\|open\|type\|val\)\>\|external\>.*:\)', 'bW'))
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215 else return ind
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216 endif
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217
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218 " Indent if current line begins with 'constraint':
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219 elseif line =~ '^\s*constraint\>'
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220 if lline !~ s:obj
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221 return indent(search('^\s*\(inherit\|initializer\|method\|val\)\>', 'bW'))
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222 else return ind
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223 endif
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224
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225 " Indent if current line begins with 'inherit':
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226 elseif line =~ '^\s*inherit\>'
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227 if lline !~ s:obj
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228 return indent(search('^\s*\(constraint\|initializer\|method\|val\)\>', 'bW'))
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229 else return ind
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230 endif
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231
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232 " Indent if current line begins with 'inherit':
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233 elseif line =~ '^\s*initializer\>'
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234 if lline !~ s:obj
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235 return indent(search('^\s*\(constraint\|inherit\|method\|val\)\>', 'bW'))
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236 else return ind
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237 endif
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238
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239 " Indent if current line begins with 'method':
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240 elseif line =~ '^\s*method\>'
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241 if lline !~ s:obj
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242 return indent(search('^\s*\(\(constraint\|inherit\|initializer\|val\)\>\|method\>.*\(:\|=\)\)', 'bW'))
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243 else return ind
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244 endif
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245
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246 endif
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247
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248 " Add a 'shiftwidth' after lines ending with:
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249 if lline =~ '\(:\|=\|->\|<-\|(\|\[\|{\|{<\|\[|\|\[<\|\<\(begin\|do\|else\|fun\|function\|functor\|if\|initializer\|object\|parser\|private\|sig\|struct\|then\|try\)\|\<object\s*(.*)\)\s*$'
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250 let ind = ind + &sw
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251
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252 " Back to normal indent after lines ending with ';;':
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253 elseif lline =~ ';;\s*$' && lline !~ '^\s*;;'
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254 let ind = s:GetInd(v:lnum, s:letpat, s:letlim)
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255
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256 " Back to normal indent after lines ending with 'end':
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257 elseif lline =~ '\<end\s*$'
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258 let ind = s:FindPair(s:module, '','\<end\>')
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259
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260 " Back to normal indent after lines ending with 'in':
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261 elseif lline =~ '\<in\s*$' && lline !~ '^\s*in\>'
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262 let ind = s:FindPair('\<let\>', '', '\<in\>')
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263
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264 " Back to normal indent after lines ending with 'done':
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265 elseif lline =~ '\<done\s*$'
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266 let ind = s:FindPair('\<do\>', '','\<done\>')
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267
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268 " Back to normal indent after lines ending with '}' or '>}':
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269 elseif lline =~ '\(\|>\)}\s*$'
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270 let ind = s:FindPair('{', '','}')
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271
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272 " Back to normal indent after lines ending with ']', '|]' or '>]':
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273 elseif lline =~ '\(\||\|>\)\]\s*$'
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274 let ind = s:FindPair('\[', '','\]')
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275
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276 " Back to normal indent after comments:
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277 elseif lline =~ '\*)\s*$'
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278 call search('\*)', 'bW')
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279 let ind = indent(searchpair('(\*', '', '\*)', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string"'))
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280
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281 " Back to normal indent after lines ending with ')':
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282 elseif lline =~ ')\s*$'
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283 let ind = s:FindPair('(', '',')')
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284
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285 endif
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286
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287 " Subtract a 'shiftwidth' after lines matching 'match ... with parser':
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288 if lline =~ '^\s*match\>.*\<with\>\s*\<parser\s*$'
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289 let ind = ind - &sw
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290 endif
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291
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292 return ind
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293
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294 endfunction
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295
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296 " vim:sw=2
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