Boost::regex

Common usage:

Boost::regex Express;

Regex_match (str,express); bool

Smatch what;

Cmatch what;

typedef match_results<const Char*> Cmatch;
typedef match_results<std::string::const_iterator> Smatch;

Regex_search (str,what,express); bool

WHAT[0];

WHAT[1];

Regex_replace (Str,express,kongge);

① matches a full string with multiple results

Primarily for string

Boost::sregex_iterator ite (Str.begin (), Str.end (), express);
Boost::sregex_iterator Endite;
while (ite! = endite)
{
cout<<*ite<<endl;
ite++;
}

Ii

Char *p = "www.baidu.com---dffsfdsf--f-ff www.google.comddfdsffd";

Boost::regex exp ("\\w{3}\\" ( \\w+\\.) + (NET|COM|CN) ");

char *tmp = p;

Cmath what;

while (Boost::regex_search (TMP, what, exp))

{

cout<<what[0]<<endl;

TMP = What[0].second;

}

③ can be obtained by const *P = S.c_str ();

Const_reference operator[] (int n) const: Returns a sub_match reference, when N=0 returns a matching result of [First,last], when 0<n<=size, returns the matching result of the corresponding tuple,

When N>size returns a matched value as a false sub_match structure, tuples correspond to the order of the left brackets and sub_match, starting with 1

A well-written post

Http://www.cnblogs.com/hucn/archive/2011/05/09/2041490.html

Boost::regex iterator

Http://www.boost.org/doc/libs/1_55_0/libs/regex/doc/html/boost_regex/ref/regex_iterator.html

Boost::regex