operator< <regex>

Moins que la comparaison pour des objets.

template<class BidIt>
    bool operator<(const sub_match<BidIt>& left,
        const sub_match<BidIt>& right);
template<class BidIt, class IOtraits, class Alloc>
    bool operator<(
        const basic_string<typename iterator_traits<BidIt>::value_type, IOtraits, Alloc>& left,
        const sub_match<BidIt>& right);
template<class BidIt, class IOtraits, class Alloc>
    bool operator<(const sub_match<BidIt>& left,
        const basic_string<typename iterator_traits<BidIt>::value_type, IOtraits, Alloc>& right);
template<class BidIt>
    bool operator<(const typename iterator_traits<BidIt>::value_type *left,
        const sub_match<BidIt>& right);
template<class BidIt>
    bool operator<(const sub_match<BidIt>& left,
        const typename iterator_traits<BidIt>::value_type *right);
template<class BidIt>
    bool operator<(const typename iterator_traits<BidIt>::value_type& left,
        const sub_match<BidIt>& right);
template<class BidIt>
    bool operator<(const sub_match<BidIt>& left,
        const typename iterator_traits<BidIt>::value_type& right);

Paramètres

BidIt
Le type d'itérateur.
IOtraits
La classe Ctraits de chaîne.
Alloc
La classe de l'allocateur.
left
l'objet gauche à comparer.
right
Le bon objet à comparer.

Notes

Chaque opérateur de modèle convertit ses arguments en type chaîne et retourne la valeur true uniquement si la valeur convertie d' left compare moins que la valeur convertie d' right.

Exemple

// std_tr1__regex__operator_lt.cpp 
// compile with: /EHsc 
#include <regex> 
#include <iostream> 
 
typedef std::cmatch::string_type Mystr; 
int main() 
    { 
    std::regex rx("c(a*)|(b)"); 
    std::cmatch mr; 
 
    std::regex_search("xcaaay", mr, rx); 
 
    std::csub_match sub = mr[1]; 
    std::cout << "sub == " << sub << std::endl; 
    std::cout << std::endl; 
 
    std::cout << "sub < sub == " << std::boolalpha 
        << (sub < sub) << std::endl; 
 
    std::cout << "string(\"aab\") < sub == " << std::boolalpha 
        << (Mystr("aab") < sub) << std::endl; 
    std::cout << "sub < string(\"aab\") == " << std::boolalpha 
        << (sub < Mystr("aab")) << std::endl; 
 
    std::cout << "\"aab\" < sub == " << std::boolalpha 
        << ("aab" < sub) << std::endl; 
    std::cout << "sub < \"aab\" == " << std::boolalpha 
        << (sub < "aab") << std::endl; 
 
    std::cout << "'a' < sub == " << std::boolalpha 
        << ('a' < sub) << std::endl; 
    std::cout << "sub < 'a' == " << std::boolalpha 
        << (sub < 'a') << std::endl; 
 
    return (0); 
    }