icon Top 9 categories map      RocketAware > Perl >

m//x ignores whitespace before ?*+{}

Tips: Browse or Search all pages for efficient awareness of Perl functions, operators, and FAQs.


Search Perl pages


By activity
Professions, Sciences, Humanities, Business, ...

User Interface
Text-based, GUI, Audio, Video, Keyboards, Mouse, Images,...

Text Strings
Conversions, tests, processing, manipulation,...

Integer, Floating point, Matrix, Statistics, Boolean, ...

Algorithms, Memory, Process control, Debugging, ...

Stored Data
Data storage, Integrity, Encryption, Compression, ...

Networks, protocols, Interprocess, Remote, Client Server, ...

Hard World
Timing, Calendar and Clock, Audio, Video, Printer, Controls...

File System
Management, Filtering, File & Directory access, Viewers, ...

m//x ignores whitespace before ?*+{}
The m//x construct has always been intended to ignore all unescaped whitespace. However, before Perl 5.004, whitespace had the effect of escaping repeat modifiers like ``*'' or ``?''; for example, /a *b/x was (mis)interpreted as /a\*b/x. This bug has been fixed in 5.004.

Source: what's new for perl5.004
Copyright: Larry Wall, et al.
Next: nested sub{} closures work now

Previous: m//gc does not reset search position on failure

(Corrections, notes, and links courtesy of RocketAware.com)

[Overview Topics]

Up to: NUL terminated String Comparison and Search

Rapid-Links: Search | About | Comments | Submit Path: RocketAware > Perl > perldelta/m__x.htm
RocketAware.com is a service of Mib Software
Copyright 2000, Forrest J. Cavalier III. All Rights Reserved.
We welcome submissions and comments