24 Strings library [strings]

24.3 String classes [string.classes]

24.3.3 basic_­string non-member functions [string.nonmembers]

24.3.3.6 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;

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

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