Pattern (regular expression) matching -deprecated version
Author(s): The CLIP Group.(Deprecated - please use the new "regexp" package instead.)
This library provides facilities for matching strings and terms against patterns (i.e., regular expressions).
Usage and interface
- Library usage:
:- use_module(library(patterns)). - Exports:
- Predicates:
match_pattern/2, match_pattern/3, case_insensitive_match/2, letter_match/2, match_pattern_pred/2. - Regular Types:
pattern/1.
- Predicates:
- Imports:
Documentation on exports
Usage:match_pattern(Pattern,String)
Matches String against Pattern. For example, match_pattern("*.pl","foo.pl") succeeds.
- The following properties should hold at call time:
(patterns:pattern/1)Pattern is a pattern to match against.
(basic_props:string/1)String is a string (a list of character codes).
Usage:match_pattern(Pattern,String,Tail)
Matches String against Pattern. Tail is the remainder of the string after the match. For example, match_pattern("??*","foo.pl",Tail) succeeds, instantiating Tail to "o.pl".
- The following properties should hold at call time:
(patterns:pattern/1)Pattern is a pattern to match against.
(basic_props:string/1)String is a string (a list of character codes).
(basic_props:string/1)Tail is a string (a list of character codes).
Usage:case_insensitive_match(Pred1,Pred2)
Tests if two predicates Pred1 and Pred2 match in a case-insensitive way.
- *
- Matches any string, including the null string.
- ?
- Matches any single character.
- [...]
- Matches any one of the enclosed characters. A pair of characters separated by a minus sign denotes a range; any character lexically between those two characters, inclusive, is matched. If the first character following the [ is a ^ then any character not enclosed is matched. No other character is special inside this construct. To include a ] in a character set, you must make it the first character. To include a `-', you must use it in a context where it cannot possibly indicate a range: that is, as the first character, or immediately after a range.
- |
- Specifies an alternative. Two patterns A and B with | in between form an expression that matches anything that either A or B will match.
- {...}
- Groups alternatives inside larger patterns.
- \
- Quotes a special character (including itself).
Usage:pattern(P)
P is a pattern to match against.
Usage:match_pattern_pred(Pred1,Pred2)
Tests if two predicates Pred1 and Pred2 match using regular expressions.
