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*pi_logipat.txt* Logical Patterns Mar 13, 2013
Author: Charles E. Campbell <NdrOchip@ScampbellPfamily.AbizM>
Copyright: (c) 2004-2013 by Charles E. Campbell *logipat-copyright*
The VIM LICENSE applies to LogiPat.vim and LogiPat.txt
(see |copyright|) except use "LogiPat" instead of "Vim"
No warranty, express or implied. Use At-Your-Own-Risk.
==============================================================================
1. Contents *logipat* *logipat-contents*
1. Contents.................: |logipat-contents|
2. LogiPat Manual...........: |logipat-manual|
3. LogiPat Examples.........: |logipat-examples|
4. Caveat...................: |logipat-caveat|
5. LogiPat History..........: |logipat-history|
==============================================================================
2. LogiPat Manual *logipat-manual* *logipat-man*
*logipat-arg* *logipat-input* *logipat-pattern* *logipat-operators*
Boolean logic patterns are composed of
operators ! = not
| = logical-or
& = logical-and
grouping ( ... )
patterns "pattern"
:LogiPat {boolean-logic pattern} *:LogiPat*
:LogiPat is a command which takes a boolean-logic
argument (|logipat-arg|).
:LP {boolean-logic pattern} *:LP*
:LP is a shorthand command version of :LogiPat
(|:LogiPat|).
:ELP {boolean-logic pattern} *:ELP*
No search is done, but the conversion from the
boolean logic pattern to the regular expression
is performed and echoed onto the display.
:LogiPatFlags {search flags} *LogiPat-flags*
:LogiPatFlags {search flags}
LogiPat uses the |search()| command. The flags
passed to that call to search() may be specified
by the :LogiPatFlags command.
:LPF {search flags} *:LPF*
:LPF is a shorthand version of :LogiPatFlags.
:let pat=LogiPat({boolean-logic pattern}) *LogiPat()*
If one calls LogiPat() directly, no search
is done, but the transformation from the boolean
logic pattern into a regular expression pattern
is performed and returned.
To get a " inside a pattern, as opposed to having it delimit
the pattern, double it.
==============================================================================
3. LogiPat Examples *logipat-examples*
LogiPat takes Boolean logic arguments and produces a regular
expression which implements the choices. A series of examples
follows:
>
:LogiPat "abc"
< will search for lines containing the string :abc:
>
:LogiPat "ab""cd"
< will search for lines containing the string :ab"c:
>
:LogiPat !"abc"
< will search for lines which don't contain the string :abc:
>
:LogiPat "abc"|"def"
< will search for lines which contain either the string
:abc: or the string :def:
>
:LogiPat !("abc"|"def")
< will search for lines which don't contain either
of the strings :abc: or :def:
>
:LogiPat "abc"&"def"
< will search for lines which contain both of the strings
:abc: and :def:
>
:let pat= LogiPat('!"abc"')
< will return the regular expression which will match
all lines not containing :abc: . The double quotes
are needed to pass normal patterns to LogiPat, and
differentiate such patterns from boolean logic
operators.
==============================================================================
4. Caveat *logipat-caveat*
The "not" operator may be fragile; ie. it may not always play well
with the & (logical-and) and | (logical-or) operators. Please try out
your patterns, possibly with :set hls, to insure that what is matching
is what you want.
==============================================================================
3. LogiPat History *logipat-history*
v3 Sep 25, 2006 * LP_Or() fixed; it now encapsulates its output
in \%(...\) parentheses
Dec 12, 2011 * |:ELP| added
* "" is mapped to a single " and left inside patterns
v2 May 31, 2005 * LPF and LogiPatFlags commands weren't working
v1 May 23, 2005 * initial release
==============================================================================
vim:tw=78:ts=8:ft=help