Simple regular expression matcher.
|void||clear ( )|
|int||compile ( String pattern, int capture=9 )|
|int||find ( String text, int start=0, int end=-1 ) const|
|String||get_capture ( int capture ) const|
|int||get_capture_count ( ) const|
|int||get_capture_start ( int capture ) const|
|StringArray||get_captures ( ) const|
|bool||is_valid ( ) const|
Class for finding text patterns in a string using regular expressions. Regular expressions are a way to define patterns of text to be searched.
This class only finds patterns in a string. It can not perform replacements.
Usage of regular expressions is too long to be explained here, but Internet is full of tutorials and detailed explanations.
Currently supported features:
() and non-capturing
Shorthand character classes
\w \W \s \S \d \D
User-defined character classes such as
Lazy (non-greedy) quantifiers
^ and end
POSIX character classes
(?!) and lookbehind
\xFF and Unicode
\uFFFF code points (in a style similar to Python)
Member Function Description¶
- void clear ( )
This method resets the state of the object, as it was freshly created. Namely, it unassigns the regular expression of this object, and forgets all captures made by the last find.
Compiles and assign the regular expression pattern to use. The limit on the number of capturing groups can be specified or made unlimited if negative.
This method tries to find the pattern within the string, and returns the position where it was found. It also stores any capturing group (see get_capture) for further retrieval.
Returns a captured group. A captured group is the part of a string that matches a part of the pattern delimited by parentheses (unless they are non-capturing parentheses (?:)).
- int get_capture_count ( ) const
Returns the number of capturing groups. A captured group is the part of a string that matches a part of the pattern delimited by parentheses (unless they are non-capturing parentheses (?:)).
- StringArray get_captures ( ) const
Return a list of all the captures made by the regular expression.
- bool is_valid ( ) const
Returns whether this object has a valid regular expression assigned.