annotate runtime/indent/fortran.vim @ 10091:9e5e3392f9b6

Added tag v7.4.2316 for changeset 68303019acc994c41e623b6be3235f7342f2be67
author Christian Brabandt <cb@256bit.org>
date Sat, 03 Sep 2016 19:00:06 +0200
parents 43efa4f5a8ea
children 876fbdd84e52
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: Fortran 2008 (and older: Fortran 2003, 95, 90, and 77)
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3 " Version: 0.45
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4 " Last Change: 2016 Aug. 29
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5 " Maintainer: Ajit J. Thakkar <ajit@unb.ca>; <http://www2.unb.ca/~ajit/>
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6 " Usage: For instructions, do :help fortran-indent from Vim
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7 " Credits:
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8 " Useful suggestions were made by: Albert Oliver Serra and Takuya Fujiwara.
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9
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10 " Only load this indent file when no other was loaded.
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11 if exists("b:did_indent")
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12 finish
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13 endif
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14 let b:did_indent = 1
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15
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16 let s:cposet=&cpoptions
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17 set cpoptions&vim
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18
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19 setlocal indentkeys+==~end,=~case,=~if,=~else,=~do,=~where,=~elsewhere,=~select
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20 setlocal indentkeys+==~endif,=~enddo,=~endwhere,=~endselect,=~elseif
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21 setlocal indentkeys+==~type,=~interface,=~forall,=~associate,=~block,=~enum
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22 setlocal indentkeys+==~endforall,=~endassociate,=~endblock,=~endenum
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23 if exists("b:fortran_indent_more") || exists("g:fortran_indent_more")
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24 setlocal indentkeys+==~function,=~subroutine,=~module,=~contains,=~program
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25 setlocal indentkeys+==~endfunction,=~endsubroutine,=~endmodule
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26 setlocal indentkeys+==~endprogram
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27 endif
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28
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29 " Determine whether this is a fixed or free format source file
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30 " if this hasn't been done yet using the priority:
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31 " buffer-local value
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32 " > global value
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33 " > file extension as in Intel ifort, gcc (gfortran), NAG, Pathscale, and Cray compilers
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34 if !exists("b:fortran_fixed_source")
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35 if exists("fortran_free_source")
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36 " User guarantees free source form
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37 let b:fortran_fixed_source = 0
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38 elseif exists("fortran_fixed_source")
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39 " User guarantees fixed source form
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40 let b:fortran_fixed_source = 1
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41 elseif expand("%:e") ==? "f\<90\|95\|03\|08\>"
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42 " Free-form file extension defaults as in Intel ifort, gcc(gfortran), NAG, Pathscale, and Cray compilers
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43 let b:fortran_fixed_source = 0
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44 elseif expand("%:e") ==? "f\|f77\|for"
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45 " Fixed-form file extension defaults
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46 let b:fortran_fixed_source = 1
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47 else
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48 " Modern fortran still allows both fixed and free source form
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49 " Assume fixed source form unless signs of free source form
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50 " are detected in the first five columns of the first s:lmax lines.
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51 " Detection becomes more accurate and time-consuming if more lines
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52 " are checked. Increase the limit below if you keep lots of comments at
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53 " the very top of each file and you have a fast computer.
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54 let s:lmax = 500
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55 if ( s:lmax > line("$") )
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56 let s:lmax = line("$")
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57 endif
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58 let b:fortran_fixed_source = 1
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59 let s:ln=1
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60 while s:ln <= s:lmax
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61 let s:test = strpart(getline(s:ln),0,5)
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62 if s:test !~ '^[Cc*]' && s:test !~ '^ *[!#]' && s:test =~ '[^ 0-9\t]' && s:test !~ '^[ 0-9]*\t'
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63 let b:fortran_fixed_source = 0
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64 break
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65 endif
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66 let s:ln = s:ln + 1
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67 endwhile
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68 endif
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69 endif
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70
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71 " Define the appropriate indent function but only once
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72 if (b:fortran_fixed_source == 1)
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73 setlocal indentexpr=FortranGetFixedIndent()
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74 if exists("*FortranGetFixedIndent")
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75 finish
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76 endif
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77 else
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78 setlocal indentexpr=FortranGetFreeIndent()
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79 if exists("*FortranGetFreeIndent")
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80 finish
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81 endif
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82 endif
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83
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84 function FortranGetIndent(lnum)
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85 let ind = indent(a:lnum)
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86 let prevline=getline(a:lnum)
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87 " Strip tail comment
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88 let prevstat=substitute(prevline, '!.*$', '', '')
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89 let prev2line=getline(a:lnum-1)
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90 let prev2stat=substitute(prev2line, '!.*$', '', '')
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91
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92 "Indent do loops only if they are all guaranteed to be of do/end do type
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93 if exists("b:fortran_do_enddo") || exists("g:fortran_do_enddo")
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94 if prevstat =~? '^\s*\(\d\+\s\)\=\s*\(\a\w*\s*:\)\=\s*do\>'
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95 let ind = ind + shiftwidth()
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96 endif
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97 if getline(v:lnum) =~? '^\s*\(\d\+\s\)\=\s*end\s*do\>'
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98 let ind = ind - shiftwidth()
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99 endif
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100 endif
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101
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102 "Add a shiftwidth to statements following if, else, else if, case,
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103 "where, else where, forall, type, interface and associate statements
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104 if prevstat =~? '^\s*\(case\|else\|else\s*if\|else\s*where\)\>'
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105 \ ||prevstat=~? '^\s*\(type\|interface\|associate\|enum\)\>'
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106 \ ||prevstat=~?'^\s*\(\d\+\s\)\=\s*\(\a\w*\s*:\)\=\s*\(forall\|where\|block\)\>'
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107 \ ||prevstat=~? '^\s*\(\d\+\s\)\=\s*\(\a\w*\s*:\)\=\s*if\>'
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108 let ind = ind + shiftwidth()
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109 " Remove unwanted indent after logical and arithmetic ifs
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110 if prevstat =~? '\<if\>' && prevstat !~? '\<then\>'
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111 let ind = ind - shiftwidth()
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112 endif
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113 " Remove unwanted indent after type( statements
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114 if prevstat =~? '^\s*type\s*('
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115 let ind = ind - shiftwidth()
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116 endif
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117 endif
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118
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119 "Indent program units unless instructed otherwise
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120 if !exists("b:fortran_indent_less") && !exists("g:fortran_indent_less")
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121 let prefix='\(\(pure\|impure\|elemental\|recursive\)\s\+\)\{,2}'
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122 let type='\(\(integer\|real\|double\s\+precision\|complex\|logical'
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123 \.'\|character\|type\|class\)\s*\S*\s\+\)\='
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124 if prevstat =~? '^\s*\(module\|contains\/submodule\|program\)\>'
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125 \ ||prevstat =~? '^\s*'.prefix.'subroutine\>'
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126 \ ||prevstat =~? '^\s*'.prefix.type.'function\>'
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127 \ ||prevstat =~? '^\s*'.type.prefix.'function\>'
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128 let ind = ind + shiftwidth()
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129 endif
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130 if getline(v:lnum) =~? '^\s*contains\>'
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131 \ ||getline(v:lnum)=~? '^\s*end\s*'
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132 \ .'\(function\|subroutine\|module\/submodule\|program\)\>'
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133 let ind = ind - shiftwidth()
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134 endif
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135 endif
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136
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137 "Subtract a shiftwidth from else, else if, elsewhere, case, end if,
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138 " end where, end select, end forall, end interface, end associate,
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139 " end enum, end type, end block and end type statements
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140 if getline(v:lnum) =~? '^\s*\(\d\+\s\)\=\s*'
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141 \. '\(else\|else\s*if\|else\s*where\|case\|'
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142 \. 'end\s*\(if\|where\|select\|interface\|'
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143 \. 'type\|forall\|associate\|enum\|block\)\)\>'
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144 let ind = ind - shiftwidth()
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145 " Fix indent for case statement immediately after select
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146 if prevstat =~? '\<select\s\+\(case\|type\)\>'
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147 let ind = ind + shiftwidth()
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148 endif
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149 endif
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150
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151 "First continuation line
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152 if prevstat =~ '&\s*$' && prev2stat !~ '&\s*$'
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153 let ind = ind + shiftwidth()
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154 endif
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155 "Line after last continuation line
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156 if prevstat !~ '&\s*$' && prev2stat =~ '&\s*$' && prevstat !~? '\<then\>'
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157 let ind = ind - shiftwidth()
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158 endif
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159
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160 return ind
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161 endfunction
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162
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163 function FortranGetFreeIndent()
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164 "Find the previous non-blank line
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165 let lnum = prevnonblank(v:lnum - 1)
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166
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167 "Use zero indent at the top of the file
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168 if lnum == 0
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169 return 0
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170 endif
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171
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172 let ind=FortranGetIndent(lnum)
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173 return ind
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174 endfunction
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175
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176 function FortranGetFixedIndent()
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177 let currline=getline(v:lnum)
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178 "Don't indent comments, continuation lines and labelled lines
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179 if strpart(currline,0,6) =~ '[^ \t]'
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180 let ind = indent(v:lnum)
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181 return ind
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182 endif
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183
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184 "Find the previous line which is not blank, not a comment,
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185 "not a continuation line, and does not have a label
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186 let lnum = v:lnum - 1
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187 while lnum > 0
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188 let prevline=getline(lnum)
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189 if (prevline =~ "^[C*!]") || (prevline =~ "^\s*$")
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190 \ || (strpart(prevline,5,1) !~ "[ 0]")
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191 " Skip comments, blank lines and continuation lines
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192 let lnum = lnum - 1
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193 else
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194 let test=strpart(prevline,0,5)
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195 if test =~ "[0-9]"
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196 " Skip lines with statement numbers
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197 let lnum = lnum - 1
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198 else
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199 break
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200 endif
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201 endif
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202 endwhile
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203
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204 "First line must begin at column 7
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205 if lnum == 0
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206 return 6
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207 endif
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208
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209 let ind=FortranGetIndent(lnum)
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210 return ind
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211 endfunction
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212
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213 let &cpoptions=s:cposet
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214 unlet s:cposet
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215
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216 " vim:sw=2 tw=130