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operator!= <regex>

Not equal comparison for various objects.

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);
template<class BidIt, class Alloc>
    bool operator!=(const match_results<BidIt, Alloc>& left,
        const match_results<BidIt, Alloc>& right);

BidIt

The iterator type.

IOtraits

The string traits class.

Alloc

The allocator class.

left

The left object to compare.

right

The right object to compare.

Each template operator returns !(left == right).

 

// std_tr1__regex__operator_ne.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 << "match == " << mr.str() << std::endl; 
    std::cout << "sub == " << sub << std::endl; 
    std::cout << std::endl; 
 
    std::cout << "match != match == " << std::boolalpha 
        << (mr != mr) << 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); 
    } 
 
match == caaa
sub == aaa

match != match == false
sub != sub == false
string("aab") != sub == true
sub != string("aab") == true
"aab" != sub == true
sub != "aab" == true
'a' != sub == true
sub != 'a' == true

Header: <regex>

Namespace: std

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