Re: Ada83 -Booch regular expression

[Vincent Marciante <INALID_EXCEPT_FOR_marciant@earthlink.net>]

c-kif-kif wrote:
 
> i'm trying to do some pattern matching in Ada83 with the
> Booch regular expression components - without any success.
> Is there anyone who can give me some exemple code
> on how to instantiate and use the regular expression
> components for strings ?


A quote from page 542 of the book _SOFTWARE_COMPONENTS_WITH_ 
_Ada__Structures,_Tools,_and_Subsystems follows:


with pattern_match_regular_expression;
package character_match is
  new pattern_match_regular_expresion
     (item         => character,
      index        => positive,
      items        => string,
      any_item     => '?',
      escape_item  => '/',
      not_item     => '~',
      closure_item => '*',
      start_class  => '{'
      stop_class   => '}',
      is_equal     => "=");

Given that instantiation, we can consider writing patterns
such as:

o  rerecord               The literal string "rerecord"

o  {aeiou}??????ing       A ten character word starting
                          with a vowel and ending in "ing"

o  ~{aeiou}??????????ing  A ten character word starting
                          with anything but a vowel and
                          ending in "ing"

o  10*1                   A 1 follwed by zero or more 0's,
                          followed by a 1

o  100*1                  A 1 follwed by one or more 0's,
                          followed by a 1

o  x/*y                   The literal string "x*y"


end quote



By the way, I have the okay from Grady Booch 
(and his publisher) to put together a version
of the above mentioned book that will be
available online.  I just have not had the 
time to finish it :(

By the way, questions about the Ada 83 Booch
components may also be asked in the chat forum
at AdaPower.  That is where the Original Booch
Components are available for download and is 
where the online version of the book will 
eventually appear. The main URL is:

http://www.adapower.com/original_booch/


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