This module uses the following syntax: . Match any char [incl. newline] * Match zero or more + Match one or more ? Match zero or one | Match alternatives  Class &lb;&rb; Group or subexpression Backslash characters: \. Character . \* Character * \+ Character + \? Character ? \| Character | \\ Backslash \[ Character [ \r Carriage return \n Line feed \t Horizontal tab \e Escape \d Digits class: [0-9] \D No digits: [^0-9] \w Word class: [0-9a-zA-Z_] \W No word: [^0-9a-zA-Z_] \s Whitespace \S No whitespace All other backslash characters simply return the trailing character, but this can change in future versions. Classes: [abc] - match a or b or c [^abc] - match everything except a or b or c [a-z] - match a or b or .. z [-abc] - match - or a or b or c abc] - match ] or a or b or c [\d\n] - match digit or line feed Backslash characters in classes: \r Carriage return \n Line feed \t Horizontal tab \e Escape \] Character ] \- Character - \d Digits class: [0-9] \w Word class: [0-9a-zA-Z_] \s Whitespace All other backslash characters simply return the trailing character, but this can change in future versions.
\ ============================================================================== \ \ rgx_expl - the regular expression example in the ffl \ \ Copyright (C) 2007 Dick van Oudheusden \ \ This library is free software; you can redistribute it and/or \ modify it under the terms of the GNU General Public \ License as published by the Free Software Foundation; either \ version 2 of the License, or (at your option) any later version. \ \ This library is distributed in the hope that it will be useful, \ but WITHOUT ANY WARRANTY; without even the implied warranty of \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU \ General Public License for more details. \ \ You should have received a copy of the GNU General Public \ License along with this library; if not, write to the Free \ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. \ \ ============================================================================== \ \ $Date: 2008-10-06 18:22:09 $ $Revision: 1.3 $ \ \ ============================================================================== include ffl/rgx.fs \ Create a regular expression variable rgx1 rgx-create rgx1 \ Compile a regular expression and check the result s" ((a*)b)*" rgx1 rgx-compile [IF] .( Expression successful compiled) cr [ELSE] .( Compilation failed on position:) . cr [THEN] \ Match case sensitive a test string s" abb" rgx1 rgx-cmatch? [IF] .( Test string matched) cr [ELSE] .( No match) cr [THEN] \ Create a regular expression variable on the heap rgx-new value rgx2 \ Compile a regular expression for matching a float number s" [-+\s]?\d+(\.\d+)?" rgx2 rgx-compile [IF] .( Expression successful compiled) cr [ELSE] .( Compilation failed on position:) . cr [THEN] \ Match a float number s" -12.47" rgx2 rgx-cmatch? [IF] .( Float number matched) cr [ELSE] .( No match) cr [THEN] \ Free the variable from the heap rgx2 rgx-free
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