Re: Scan of regexp mistakes

["Mattias Engdegård" <mattiase@acm.org>]

9 mars 2019 kl. 18.12 skrev Paul Eggert <eggert@cs.ucla.edu>:
> 
> Mattias Engdegård wrote:
>> -    ("^[0-9-]+ +\\|^ \\{11,\\}\\|^\t \\{3,\\}\\|^\\(Sun\\|Mon\\|Tue\\|Wed\\|Thu\\|Fri\\|Sat\\) [A-z][a-z][a-z] [0-9:+ ]+"
>> +    ("^[0-9-]+ +\\|^ \\{11,\\}\\|^\t \\{3,\\}\\|^\\(Sun\\|Mon\\|Tue\\|Wed\\|Thu\\|Fri\\|Sat\\) [A-Z][a-z][a-z] [0-9:+ ]+"
>> The [A-z] should become [A-Za-z] rather than [A-Z], right?
> 
> From context I think not. It's trying to match a particular English-language date format where month-name abbreviations are always capitalized. The author was too lazy to list the twelve abbreviations.

You are right, and a smaller regexp (in the size of the matched language) is preferable -- especially as the preceding comment is worried about accidental matches. Thanks!