template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(const basic_string<charT, traits, Allocator>& lhs,
const basic_string<charT, traits, Allocator>& rhs);
Returns: basic_string<charT, traits, Allocator>(lhs).append(rhs).
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(basic_string<charT, traits, Allocator>&& lhs,
const basic_string<charT, traits, Allocator>& rhs);
Returns: std::move(lhs.append(rhs)).
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(const basic_string<charT, traits, Allocator>& lhs,
basic_string<charT, traits, Allocator>&& rhs);
Returns: std::move(rhs.insert(0, lhs)).
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(basic_string<charT, traits, Allocator>&& lhs,
basic_string<charT, traits, Allocator>&& rhs);
Returns: std::move(lhs.append(rhs)). [ Note: Or equivalently, std::move(rhs.insert(0, lhs)). — end note ]
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(const charT* lhs,
const basic_string<charT, traits, Allocator>& rhs);
Returns: basic_string<charT, traits, Allocator>(lhs) + rhs.
Remarks: Uses traits::length().
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(const charT* lhs,
basic_string<charT, traits, Allocator>&& rhs);
Returns: std::move(rhs.insert(0, lhs)).
Remarks: Uses traits::length().
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(charT lhs,
const basic_string<charT, traits, Allocator>& rhs);
Returns: basic_string<charT, traits, Allocator>(1, lhs) + rhs.
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(charT lhs,
basic_string<charT, traits, Allocator>&& rhs);
Returns: std::move(rhs.insert(0, 1, lhs)).
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(const basic_string<charT, traits, Allocator>& lhs,
const charT* rhs);
Returns: lhs + basic_string<charT, traits, Allocator>(rhs).
Remarks: Uses traits::length().
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(basic_string<charT, traits, Allocator>&& lhs,
const charT* rhs);
Returns: std::move(lhs.append(rhs)).
Remarks: Uses traits::length().
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(const basic_string<charT, traits, Allocator>& lhs,
charT rhs);
Returns: lhs + basic_string<charT, traits, Allocator>(1, rhs).
template<class charT, class traits, class Allocator>
basic_string<charT, traits, Allocator>
operator+(basic_string<charT, traits, Allocator>&& lhs,
charT rhs);
Returns: std::move(lhs.append(1, rhs)).