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std::operator+(std::basic_string) - cppreference.com

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template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( const basic_string<CharT,Traits,Alloc>& lhs, const basic_string<CharT,Traits,Alloc>& rhs );

 (1)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( const CharT* lhs, const basic_string<CharT,Traits,Alloc>& rhs );

 (2)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( CharT lhs, const basic_string<CharT,Traits,Alloc>& rhs );

 (3)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( const basic_string<CharT,Traits,Alloc>& lhs, const CharT* rhs );

 (4)

template<class CharT, class Traits, class Alloc> basic_string<CharT,Traits,Alloc> operator+( const basic_string<CharT,Traits,Alloc>& lhs, CharT rhs );

 (5)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( basic_string<CharT,Traits,Alloc>&& lhs, const basic_string<CharT,Traits,Alloc>& rhs );

 (6) (dal C++11)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( const basic_string<CharT,Traits,Alloc>& lhs, basic_string<CharT,Traits,Alloc>&& rhs );

 (7) (dal C++11)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( basic_string<CharT,Traits,Alloc>&& lhs, basic_string<CharT,Traits,Alloc>&& rhs );

 (8) (dal C++11)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+(const CharT* lhs, basic_string<CharT,Traits,Alloc>&& rhs );

 (9) (dal C++11)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( CharT lhs, basic_string<CharT,Traits,Alloc>&& rhs );

 (10) (dal C++11)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( basic_string<CharT,Traits,Alloc>&& lhs, const CharT* rhs );

 (11) (dal C++11)

template< class CharT, class Traits, class Alloc > basic_string<CharT,Traits,Alloc> operator+( basic_string<CharT,Traits,Alloc>&& lhs, CharT rhs );

 (12) (dal C++11)

Restituisce una stringa contenente i caratteri da lhs seguito dai personaggi rhs.

Original:

Returns a string containing characters from lhs followed by the characters from rhs.

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Parametri

lhs -

stringa, carattere, o puntatore al primo carattere di terminazione null array

Original:

string, character, or pointer to the first character in a null-terminated array

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rhs -

stringa, carattere, o puntatore al primo carattere di terminazione null array

Original:

string, character, or pointer to the first character in a null-terminated array

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Valore di ritorno

1) basic_string<CharT,Traits,Alloc>(lhs).append(rhs)

2) basic_string<CharT,Traits,Alloc>(lhs) + rhs

3) basic_string<CharT,Traits,Alloc>(1,lhs) + rhs

4) lhs + basic_string<CharT,Traits,Alloc>(rhs)

5) lhs + basic_string<CharT,Traits,Alloc>(1,rhs)

6) std::move(lhs.append(rhs))

7) std::move(rhs.insert(0, lhs))

8) std::move(lhs.append(rhs)) or std::move(rhs.insert(0, lhs))

9) std::move(rhs.insert(0, lhs))

10) std::move(rhs.insert(0, 1, lhs))

11) std::move(lhs.append(rhs))

12) std::move(lhs.append(1, rhs))

Esempio

#include <iostream>
#include <string>

int main()
{
    std::string s1 = "Hello";
    std::string s2 = "world";
    std::cout << s1 + ' ' + s2 + "!\n";
}

Output:

Vedi anche

aggiunge caratteri in coda
(metodo pubblico) [modifica]
aggiunge caratteri in coda
(metodo pubblico) [modifica]
inserisce caratteri
(metodo pubblico) [modifica]