Namespaces
Variants
Views
Actions

std::operator+(std::basic_string)

From cppreference.com
< cpp‎ | string‎ | basic string
Revision as of 15:47, 1 July 2013 by P12bot (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
 
 
 
std::basic_string
 
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) (since 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) (since 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) (since 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) (since C++11)
template< class CharT, class Traits, class Alloc >

    basic_string<CharT,Traits,Alloc>
        operator+( CharT lhs,

                   basic_string<CharT,Traits,Alloc>&& rhs );
(10) (since 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) (since C++11)
template< class CharT, class Traits, class Alloc >

    basic_string<CharT,Traits,Alloc>
        operator+( basic_string<CharT,Traits,Alloc>&& lhs,

                   CharT rhs );
(12) (since C++11)

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

Contents

[edit] Parameters

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

[edit] Return value

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))

[edit] Example

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

Output:

Hello world!

[edit] See also

appends characters to the end
(public member function) [edit]
appends characters to the end
(public member function) [edit]
inserts characters
(public member function) [edit]