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annotate runtime/plugin/logiPat.vim @ 22485:a950cd957dad

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Added tag v8.2.1790 for changeset 93f3cdc296e7e92f853c9bd07fc06c360693ffc2
author Bram Moolenaar <Bram@vim.org>
date Sat, 03 Oct 2020 14:00:05 +0200
parents b73f9ed65072
children 02bd0fe77c68
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rev   line source
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1 " LogiPat: Boolean logical pattern matcher
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2 " Author: Charles E. Campbell
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3 " Date: Apr 04, 2016
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4 " Version: 4
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5 " Purpose: to do Boolean-logic based regular expression pattern matching
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6 " Copyright: Copyright (C) 1999-2011 Charles E. Campbell {{{1
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7 " Permission is hereby granted to use and distribute this code,
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8 " with or without modifications, provided that this copyright
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9 " notice is copied with it. Like most anything else that's free,
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10 " LogiPat.vim is provided *as is* and comes with no warranty
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11 " of any kind, either expressed or implied. By using this
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12 " plugin, you agree that in no event will the copyright
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13 " holder be liable for any damages resulting from the use
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14 " of this software.
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15 "
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16 " Usage: {{{1
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17 " :LogiPat ...
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18 "
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19 " Boolean logic supported:
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20 " () grouping operators
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21 " ! not the following pattern
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22 " | logical or
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23 " & logical and
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24 " "..pattern.."
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25 " Example: {{{1
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26 " :LogiPat !("january"|"february")
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27 " would match all strings not containing the strings january
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28 " or february
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29 " GetLatestVimScripts: 1290 1 :AutoInstall: LogiPat.vim
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30 "
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31 " Behold, you will conceive in your womb, and bring forth a son, {{{1
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32 " and will call his name Jesus. He will be great, and will be
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33 " called the Son of the Most High. The Lord God will give him the
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34 " throne of his father, David, and he will reign over the house of
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35 " Jacob forever. There will be no end to his kingdom. (Luke 1:31-33 WEB)
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36
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37 " ---------------------------------------------------------------------
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38 " Load Once: {{{1
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39 if &cp || exists("loaded_logiPat")
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40 finish
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41 endif
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42 let g:loaded_logiPat = "v4"
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43 let s:keepcpo = &cpo
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44 set cpo&vim
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45 "DechoRemOn
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46
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47 " ---------------------------------------------------------------------
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48 " Public Interface: {{{1
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49 com! -nargs=* LogiPat call LogiPat(<q-args>,1)
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50 sil! com -nargs=* LP call LogiPat(<q-args>,1)
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51 sil! com -nargs=* LPR call LogiPat(<q-args>,1,"r")
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52 com! -nargs=+ LPE echomsg LogiPat(<q-args>)
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53 com! -nargs=+ LogiPatFlags let s:LogiPatFlags="<args>"
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54 sil! com -nargs=+ LPF let s:LogiPatFlags="<args>"
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55
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56 " =====================================================================
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57 " Functions: {{{1
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58
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59 " ---------------------------------------------------------------------
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60 " LogiPat: this function interprets the boolean-logic pattern {{{2
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61 fun! LogiPat(pat,...)
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62 " call Dfunc("LogiPat(pat<".a:pat.">)")
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63
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64 " LogiPat(pat,dosearch)
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65 if a:0 > 0
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66 let dosearch= a:1
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67 else
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68 let dosearch= 0
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69 endif
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70 if a:0 >= 3
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71 let s:LogiPatFlags= a:3
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72 endif
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73
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74 let s:npatstack = 0
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75 let s:nopstack = 0
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76 let s:preclvl = 0
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77 let expr = a:pat
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78
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79 " Lexer/Parser
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80 while expr != ""
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81 " call Decho("expr<".expr.">")
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82
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83 if expr =~ '^"'
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84 " push a Pattern; accept "" as a single " in the pattern
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85 let expr = substitute(expr,'^\s*"','','')
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86 let pat = substitute(expr,'^\(\%([^"]\|\"\"\)\{-}\)"\([^"].*$\|$\)','\1','')
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87 let pat = substitute(pat,'""','"','g')
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88 let expr = substitute(expr,'^\(\%([^"]\|\"\"\)\{-}\)"\([^"].*$\|$\)','\2','')
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89 let expr = substitute(expr,'^\s*','','')
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90 " call Decho("pat<".pat."> expr<".expr.">")
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91
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92 call s:LP_PatPush('.*'.pat.'.*')
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93
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94 elseif expr =~ '^[!()|&]'
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95 " push an operator
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96 let op = strpart(expr,0,1)
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97 let expr = strpart(expr,strlen(op))
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98 " allow for those who can't resist doubling their and/or operators
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99 if op =~ '[|&]' && expr[0] == op
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100 let expr = strpart(expr,strlen(op))
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101 endif
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102 call s:LP_OpPush(op)
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103
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104 elseif expr =~ '^\s'
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105 " skip whitespace
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106 let expr= strpart(expr,1)
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107
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108 else
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109 echoerr "operator<".strpart(expr,0,1)."> not supported (yet)"
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110 let expr= strpart(expr,1)
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111 endif
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112
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113 endwhile
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114
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115 " Final Execution
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116 call s:LP_OpPush('Z')
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117
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118 let result= s:LP_PatPop(1)
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119 " call Decho("result=".result)
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120
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121 " sanity checks and cleanup
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122 if s:npatstack > 0
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123 echoerr s:npatstack." patterns left on stack!"
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124 let s:npatstack= 0
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125 endif
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126 if s:nopstack > 0
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127 echoerr s:nopstack." operators left on stack!"
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128 let s:nopstack= 0
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129 endif
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130
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131 " perform the indicated search
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132 if dosearch
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133 if exists("s:LogiPatFlags") && s:LogiPatFlags != ""
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134 " call Decho("search(result<".result."> LogiPatFlags<".s:LogiPatFlags.">)")
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135 call search(result,s:LogiPatFlags)
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136 else
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137 " call Decho("search(result<".result.">)")
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138 call search(result)
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139 endif
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140 let @/= result
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141 endif
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142
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143 " call Dret("LogiPat ".result)
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144 return result
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145 endfun
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146
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147 " ---------------------------------------------------------------------
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148 " s:String: Vim6.4 doesn't have string() {{{2
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149 func! s:String(str)
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150 return "'".escape(a:str, '"')."'"
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151 endfunc
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152
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153 " ---------------------------------------------------------------------
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154 " LP_PatPush: {{{2
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155 fun! s:LP_PatPush(pat)
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156 " call Dfunc("LP_PatPush(pat<".a:pat.">)")
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157 let s:npatstack = s:npatstack + 1
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158 let s:patstack_{s:npatstack} = a:pat
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159 " call s:StackLook("patpush") "Decho
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160 " call Dret("LP_PatPush : npatstack=".s:npatstack)
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161 endfun
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162
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163 " ---------------------------------------------------------------------
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164 " LP_PatPop: pop a number/variable from LogiPat's pattern stack {{{2
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165 fun! s:LP_PatPop(lookup)
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166 " call Dfunc("LP_PatPop(lookup=".a:lookup.")")
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167 if s:npatstack > 0
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168 let ret = s:patstack_{s:npatstack}
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169 let s:npatstack = s:npatstack - 1
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170 else
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171 let ret= "---error---"
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172 echoerr "(LogiPat) invalid expression"
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173 endif
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174 " call s:StackLook("patpop") "Decho
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175 " call Dret("LP_PatPop ".ret)
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176 return ret
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177 endfun
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178
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179 " ---------------------------------------------------------------------
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180 " LP_OpPush: {{{2
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181 fun! s:LP_OpPush(op)
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182 " call Dfunc("LP_OpPush(op<".a:op.">)")
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183
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184 " determine new operator's precedence level
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185 if a:op == '('
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186 let s:preclvl= s:preclvl + 10
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187 let preclvl = s:preclvl
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188 elseif a:op == ')'
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189 let s:preclvl= s:preclvl - 10
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190 if s:preclvl < 0
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191 let s:preclvl= 0
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192 echoerr "too many )s"
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193 endif
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194 let preclvl= s:preclvl
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195 elseif a:op =~ '|'
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196 let preclvl= s:preclvl + 2
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197 elseif a:op =~ '&'
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198 let preclvl= s:preclvl + 4
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199 elseif a:op == '!'
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200 let preclvl= s:preclvl + 6
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201 elseif a:op == 'Z'
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202 let preclvl= -1
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203 else
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204 echoerr "expr<".expr."> not supported (yet)"
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205 let preclvl= s:preclvl
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206 endif
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207 " call Decho("new operator<".a:op."> preclvl=".preclvl)
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208
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209 " execute higher-precdence operators
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210 " call Decho("execute higher-precedence operators")
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211 call s:LP_Execute(preclvl)
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212
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213 " push new operator onto operator-stack
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214 " call Decho("push new operator<".a:op."> onto stack with preclvl=".preclvl." at nopstack=".(s:nopstack+1))
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215 if a:op =~ '!'
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216 let s:nopstack = s:nopstack + 1
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217 let s:opprec_{s:nopstack} = preclvl
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218 let s:opstack_{s:nopstack} = a:op
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219 elseif a:op =~ '|'
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220 let s:nopstack = s:nopstack + 1
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221 let s:opprec_{s:nopstack} = preclvl
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222 let s:opstack_{s:nopstack} = a:op
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223 elseif a:op == '&'
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224 let s:nopstack = s:nopstack + 1
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225 let s:opprec_{s:nopstack} = preclvl
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226 let s:opstack_{s:nopstack} = a:op
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227 endif
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228
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229 " call s:StackLook("oppush") "Decho
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230 " call Dret("LP_OpPush : s:preclvl=".s:preclvl)
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231 endfun
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232
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233 " ---------------------------------------------------------------------
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234 " LP_Execute: execute operators from opstack using pattern stack {{{2
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235 fun! s:LP_Execute(preclvl)
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236 " call Dfunc("LP_Execute(preclvl=".a:preclvl.") npatstack=".s:npatstack." nopstack=".s:nopstack)
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237
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238 " execute all higher precedence operators
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239 while s:nopstack > 0 && a:preclvl < s:opprec_{s:nopstack}
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240 let op= s:opstack_{s:nopstack}
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241 " call Decho("op<".op."> nop=".s:nopstack." [preclvl=".a:preclvl."] < [opprec_".s:nopstack."=".s:opprec_{s:nopstack}."]")
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242
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243 let s:nopstack = s:nopstack - 1
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244
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245 if op == '!'
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246 let n1= s:LP_PatPop(1)
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247 call s:LP_PatPush(s:LP_Not(n1))
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248
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249 elseif op == '|'
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250 let n1= s:LP_PatPop(1)
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251 let n2= s:LP_PatPop(1)
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252 call s:LP_PatPush(s:LP_Or(n2,n1))
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253
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254 elseif op =~ '&'
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255 let n1= s:LP_PatPop(1)
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256 let n2= s:LP_PatPop(1)
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257 call s:LP_PatPush(s:LP_And(n2,n1))
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258 endif
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259
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260 " call s:StackLook("execute") "Decho
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261 endwhile
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262
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263 " call Dret("LP_Execute")
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264 endfun
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265
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266 " ---------------------------------------------------------------------
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267 " LP_Not: writes a logical-not for a pattern {{{2
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268 fun! s:LP_Not(pat)
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269 " call Dfunc("LP_Not(pat<".a:pat.">)")
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270 if a:pat =~ '^\.\*' && a:pat =~ '\.\*$'
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271 let pat= substitute(a:pat,'^\.\*\(.*\)\.\*$','\1','')
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272 let ret= '^\%(\%('.pat.'\)\@!.\)*$'
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273 else
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274 let ret= '^\%(\%('.a:pat.'\)\@!.\)*$'
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275 endif
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276 " call Dret("LP_Not ".ret)
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277 return ret
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278 endfun
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279
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280 " ---------------------------------------------------------------------
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281 " LP_Or: writes a logical-or branch using two patterns {{{2
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282 fun! s:LP_Or(pat1,pat2)
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283 " call Dfunc("LP_Or(pat1<".a:pat1."> pat2<".a:pat2.">)")
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284 let ret= '\%('.a:pat1.'\|'.a:pat2.'\)'
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285 " call Dret("LP_Or ".ret)
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286 return ret
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287 endfun
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288
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289 " ---------------------------------------------------------------------
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290 " LP_And: writes a logical-and concat using two patterns {{{2
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291 fun! s:LP_And(pat1,pat2)
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292 " call Dfunc("LP_And(pat1<".a:pat1."> pat2<".a:pat2.">)")
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293 let ret= '\%('.a:pat1.'\&'.a:pat2.'\)'
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294 " call Dret("LP_And ".ret)
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295 return ret
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296 endfun
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297
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298 " ---------------------------------------------------------------------
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299 " StackLook: {{{2
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300 fun! s:StackLook(description)
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301 " call Dfunc("StackLook(description<".a:description.">)")
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302 let iop = 1
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303 let ifp = 1
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304 " call Decho("Pattern Operator")
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305
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306 " print both pattern and operator
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307 while ifp <= s:npatstack && iop <= s:nopstack
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308 let fp = s:patstack_{ifp}
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309 let op = s:opstack_{iop}." (P".s:opprec_{s:nopstack}.')'
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310 let fplen= strlen(fp)
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311 if fplen < 30
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312 let fp= fp.strpart(" ",1,30-fplen)
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313 endif
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314 " call Decho(fp.op)
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315 let ifp = ifp + 1
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316 let iop = iop + 1
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317 endwhile
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318
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319 " print just pattern
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320 while ifp <= s:npatstack
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321 let fp = s:patstack_{ifp}
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322 " call Decho(fp)
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323 let ifp = ifp + 1
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324 endwhile
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325
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326 " print just operator
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327 while iop <= s:nopstack
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328 let op = s:opstack_{iop}." (P".s:opprec_{s:nopstack}.')'
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329 " call Decho(" ".op)
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330 let iop = iop + 1
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331 endwhile
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332 " call Dret("StackLook")
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333 endfun
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334
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335 " ---------------------------------------------------------------------
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336 " Cleanup And Modeline: {{{1
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337 let &cpo= s:keepcpo
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338 unlet s:keepcpo
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339 " vim: ts=4 fdm=marker