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annotate runtime/doc/pi_logipat.txt @ 7517:9d67399f49c6 v7.4.1060

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commit https://github.com/vim/vim/commit/6602af7fe069246dbcf419c3e904a78b60e7d4dc Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jan 7 22:01:01 2016 +0100 patch 7.4.1060 Problem: Instructions for writing tests are outdated. Solution: Mention Make_all.mak. Add steps for new style tests.
author Christian Brabandt <cb@256bit.org>
date Thu, 07 Jan 2016 22:15:05 +0100
parents ee45d3b0579b
children 47f17f66da3d
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1 *pi_logipat.txt* Logical Patterns Mar 13, 2013
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2
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3 Author: Charles E. Campbell <NdrOchip@ScampbellPfamily.AbizM>
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4 Copyright: (c) 2004-2013 by Charles E. Campbell *logipat-copyright*
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5 The VIM LICENSE applies to LogiPat.vim and LogiPat.txt
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6 (see |copyright|) except use "LogiPat" instead of "Vim"
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7 No warranty, express or implied. Use At-Your-Own-Risk.
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8
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9 ==============================================================================
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10 1. Contents *logipat* *logipat-contents*
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11
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12 1. Contents.................: |logipat-contents|
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13 2. LogiPat Manual...........: |logipat-manual|
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14 3. LogiPat Examples.........: |logipat-examples|
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15 4. Caveat...................: |logipat-caveat|
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16 5. LogiPat History..........: |logipat-history|
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17
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18 ==============================================================================
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19 2. LogiPat Manual *logipat-manual* *logipat-man*
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20
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21
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22 *logipat-arg* *logipat-input* *logipat-pattern* *logipat-operators*
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23 Boolean logic patterns are composed of
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24
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25 operators ! = not
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26 | = logical-or
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27 & = logical-and
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28 grouping ( ... )
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29 patterns "pattern"
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30
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31 :LogiPat {boolean-logic pattern} *:LogiPat*
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32 :LogiPat is a command which takes a boolean-logic
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33 argument (|logipat-arg|).
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34
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35 :LP {boolean-logic pattern} *:LP*
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36 :LP is a shorthand command version of :LogiPat
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37 (|:LogiPat|).
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38
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39 :ELP {boolean-logic pattern} *:ELP*
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40 No search is done, but the conversion from the
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41 boolean logic pattern to the regular expression
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42 is performed and echoed onto the display.
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43
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44 :LogiPatFlags {search flags} *LogiPat-flags*
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45 :LogiPatFlags {search flags}
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46 LogiPat uses the |search()| command. The flags
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47 passed to that call to search() may be specified
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48 by the :LogiPatFlags command.
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49
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50 :LPF {search flags} *:LPF*
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51 :LPF is a shorthand version of :LogiPatFlags.
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52
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53 :let pat=LogiPat({boolean-logic pattern}) *LogiPat()*
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54 If one calls LogiPat() directly, no search
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55 is done, but the transformation from the boolean
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56 logic pattern into a regular expression pattern
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57 is performed and returned.
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58
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59 To get a " inside a pattern, as opposed to having it delimit
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60 the pattern, double it.
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61
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62 ==============================================================================
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63 3. LogiPat Examples *logipat-examples*
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64
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65 LogiPat takes Boolean logic arguments and produces a regular
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66 expression which implements the choices. A series of examples
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67 follows:
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68 >
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69 :LogiPat "abc"
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70 < will search for lines containing the string :abc:
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71 >
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72 :LogiPat "ab""cd"
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73 < will search for lines containing the string :ab"c:
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74 >
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75 :LogiPat !"abc"
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76 < will search for lines which don't contain the string :abc:
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77 >
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78 :LogiPat "abc"|"def"
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79 < will search for lines which contain either the string
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80 :abc: or the string :def:
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81 >
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82 :LogiPat !("abc"|"def")
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83 < will search for lines which don't contain either
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84 of the strings :abc: or :def:
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85 >
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86 :LogiPat "abc"&"def"
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87 < will search for lines which contain both of the strings
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88 :abc: and :def:
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89 >
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90 :let pat= LogiPat('!"abc"')
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91 < will return the regular expression which will match
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92 all lines not containing :abc: . The double quotes
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93 are needed to pass normal patterns to LogiPat, and
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94 differentiate such patterns from boolean logic
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95 operators.
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96
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97
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98 ==============================================================================
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99 4. Caveat *logipat-caveat*
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100
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101 The "not" operator may be fragile; ie. it may not always play well
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102 with the & (logical-and) and | (logical-or) operators. Please try out
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103 your patterns, possibly with :set hls, to insure that what is matching
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104 is what you want.
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105
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106 ==============================================================================
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107 3. LogiPat History *logipat-history*
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108
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109 v3 Sep 25, 2006 * LP_Or() fixed; it now encapsulates its output
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110 in \%(...\) parentheses
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111 Dec 12, 2011 * |:ELP| added
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112 * "" is mapped to a single " and left inside patterns
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113 v2 May 31, 2005 * LPF and LogiPatFlags commands weren't working
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114 v1 May 23, 2005 * initial release
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115
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116 ==============================================================================
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117 vim:tw=78:ts=8:ft=help