21 Strings library [strings]

21.4 Class template basic_string [basic.string]

21.4.8 basic_string non-member functions [string.nonmembers]

21.4.8.4 operator< [string::op<]

template<class charT, class traits, class Allocator> bool operator< (const basic_string<charT,traits,Allocator>& lhs, const basic_string<charT,traits,Allocator>& rhs) noexcept;

1

Returns: lhs.compare(rhs) < 0.

template<class charT, class traits, class Allocator> bool operator< (const charT* lhs, const basic_string<charT,traits,Allocator>& rhs) noexcept;

2

Returns: rhs.compare(lhs) > 0.

template<class charT, class traits, class Allocator> bool operator< (const basic_string<charT,traits,Allocator>& lhs, const charT* rhs) noexcept;

3

Returns: lhs.compare(rhs) < 0.