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1 " Vim indent file
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2 " Language: RPL/2
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3 " Version: 0.2
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11518
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4 " Last Change: 2017 Jun 13
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7
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5 " Maintainer: BERTRAND Joël <rpl2@free.fr>
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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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233
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13 setlocal autoindent
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14 setlocal indentkeys+==~end,=~case,=~if,=~then,=~else,=~do,=~until,=~while,=~repeat,=~select,=~default,=~for,=~start,=~next,=~step,<<>,<>>
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15
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16 " Define the appropriate indent function but only once
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17 setlocal indentexpr=RplGetFreeIndent()
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18 if exists("*RplGetFreeIndent")
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19 finish
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20 endif
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21
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233
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22 let b:undo_indent = "set ai< indentkeys< indentexpr<"
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23
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24 function RplGetIndent(lnum)
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25 let ind = indent(a:lnum)
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26 let prevline=getline(a:lnum)
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27 " Strip tail comment
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28 let prevstat=substitute(prevline, '!.*$', '', '')
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29
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30 " Add a shiftwidth to statements following if, iferr, then, else, elseif,
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31 " case, select, default, do, until, while, repeat, for, start
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32 if prevstat =~? '\<\(if\|iferr\|do\|while\)\>' && prevstat =~? '\<end\>'
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33 elseif prevstat =~? '\(^\|\s\+\)<<\($\|\s\+\)' && prevstat =~? '\s\+>>\($\|\s\+\)'
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34 elseif prevstat =~? '\<\(if\|iferr\|then\|else\|elseif\|select\|case\|do\|until\|while\|repeat\|for\|start\|default\)\>' || prevstat =~? '\(^\|\s\+\)<<\($\|\s\+\)'
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35 let ind = ind + shiftwidth()
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36 endif
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37
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38 " Subtract a shiftwidth from then, else, elseif, end, until, repeat, next,
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39 " step
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40 let line = getline(v:lnum)
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41 if line =~? '^\s*\(then\|else\|elseif\|until\|repeat\|next\|step\|default\|end\)\>'
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42 let ind = ind - shiftwidth()
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43 elseif line =~? '^\s*>>\($\|\s\+\)'
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44 let ind = ind - shiftwidth()
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45 endif
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46
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47 return ind
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48 endfunction
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49
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50 function RplGetFreeIndent()
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51 " Find the previous non-blank line
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52 let lnum = prevnonblank(v:lnum - 1)
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53
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54 " Use zero indent at the top of the file
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55 if lnum == 0
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56 return 0
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57 endif
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58
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59 let ind=RplGetIndent(lnum)
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60 return ind
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61 endfunction
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62
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63 " vim:sw=2 tw=130
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