Oops ... disregard .... redface .... Example 1 is related to "match" rather than "search" .... so I suppose prefix and suffix would not apply. But, in example 2, seems like "year" should be repeat<1,4>, but: year= repeat<1,2> works: cregex date = (month= repeat<1,2>(_d)) // find the month ...

...

(delim= (set= '/','-')) // followed by a delimiter ... (day= repeat<1,2>(_d)) >> delim // and a day followed by the same delimiter ... (year= repeat<1,2>(_d >> _d)); // and the year.

actually, repeat<1,3> works for month, day, and year. Am I mixed up on what "repeat" means? cregex date = (month= repeat<1,3>(_d)) // find the month ...

...

(delim= (set= '/','-')) // followed by a delimiter ... (day= repeat<1,3>(_d)) >> delim // and a day followed by the same delimiter ... (year= repeat<1,3>(_d >> _d)); // and the year.

Lynn Allan wrote:

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Xpressive looks very promising to be able to do some things I'm trying to implement. Thanks for providing and supporting it.

I was trying to figure out the fields that make up xpression smatch'es, and expanded the Example-1 to be more verbose. Basically, I tried to "unpack" as much info as I could find in the variable "what" to clarify some fuzziness on my part. There were some questions:

* The suffix and prefix info seemed blank. Are there accessors to get more info to conform to my (possibly flawed) understanding of the docs?

* The return from regex_id seemed to be an address (like 00323F58). Is that intended? Is there some accessor to get something more meaningful? (but I'm not clear what would be meaningful). What is the purpose of "regex_id" to the user of xpressive?

* With vc7.1, there were warnings unless I cast the lengths and positions ... is this intended?

void example1_verbose() { std::string hello( "hello world!" ); sregex rex = sregex::compile( "(\\w+) (\\w+)!" ); smatch what; if( regex_match( hello, what, rex ) ) { std::cout << "Overall Size: " << static_cast<int>(what.size()) << '\n'; std::cout << "Regex Id: " << what.regex_id() << '\n'; std::cout << "what[0]: " << what[0] << '\n'; std::cout << "Length(0): " << static_cast<int>(what.length(0)) << '\n'; std::cout << "Position(0): " << static_cast<int>(what.position(0)) << '\n'; std::cout << "Str(0): " << what.str(0) << '\n'; std::cout << "what[1]: " << what[1] << '\n'; std::cout << "Length(1): " << static_cast<int>(what.length(1)) << '\n'; std::cout << "Position(1): " << static_cast<int>(what.position(1)) << '\n'; std::cout << "Str(1): " << what.str(1) << '\n'; std::cout << "what[2]: " << what[2] << '\n'; std::cout << "Length(2): " << static_cast<int>(what.length(2)) << '\n'; std::cout << "Position(2): " << static_cast<int>(what.position(2)) << '\n'; std::cout << "Str(2): " << what.str(2) << '\n'; std::cout << "Prefix(): " << what.prefix() << '\n'; std::cout << "Prefix().matched: " << what.prefix().matched << '\n'; std::cout << "Prefix().length(): " << static_cast<int>(what.prefix().length()) << '\n'; std::cout << "Prefix().str(): " << what.prefix().str() << '\n'; std::cout << "Suffix(): " << what.suffix() << '\n'; std::cout << "Suffix().matched: " << what.suffix().matched << '\n'; std::cout << "Suffix().length(): " << static_cast<int>(what.suffix().length()) << '\n'; std::cout << "Suffix().str(): " << what.suffix().str() << '\n'; } }

Example 1: Verbose:

Overall Size: 3 Regex Id: 00323F58 what[0]: hello world! Length(0): 12 Position(0): 0 Str(0): hello world! what[1]: hello Length(1): 5 Position(1): 0 Str(1): hello what[2]: world Length(2): 5 Position(2): 6 Str(2): world Prefix(): Prefix().matched: 0 Prefix().length(): 0 Prefix().str(): Suffix(): Suffix().matched: 0 Suffix().length(): 0 Suffix().str():

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