Re: What about a glob standard method in Ada.Command_Line ?

[Georg Bauhaus <rm.dash-bauhaus@futureapps.de>]

On 24.08.10 16:24, Dmitry A. Kazakov wrote:
> On Tue, 24 Aug 2010 12:27:01 +0200, Georg Bauhaus wrote:
>>
>> procedure Start_Search
>>   (Search    : in out Search_Type;
>>    Directory : in String;
>>    Matcher   : access function (Pattern : Pattern_Type) return Boolean;
>>    Filter    : in Filter_Type := (others => True));
>>
> You just do not need patterns in directory search. The first reason is that
> the underlying  OS does not support that arbitrary stuff anyway.

It is my program that matches file names against a pattern, not the OS.

The alternative Directories.Start_Search above does not need to known about
pattern matching.  The Boolean result of Matcher is all that
matters. It matters only after the OS has supplied a String and after
Matcher has run with that string (the file name) and Pattern as input.

> Another,
> more important reason is that real-life search would use filters based many
> criteria, e.g. content, and patterns beyond the scope of RE, especially
> when neither the name encoding nor case-sensitivity specified.

To me, directory search based on file content ("second order search")
seems rather unusual as a first step.  At least in my real world.
Do we have usage data?

Case-(in)sensitivity is easily handled by text pattern matching,
with existing Ada.


Georg