Standard C++ Library Reference ISO/IEC (VERSION3)

formatted output functions make use of the following additional operations, also with the expected
semantics:
operator==(Elem) and operator!=(Elem) to compare elements●
(char)ch to convert an element ch to its corresponding single-byte character code, or
'\0' if no such code exists
●
(Elem)ch to convert a char value ch to its correponding character code of type Elem●
None of the member functions of class char_traits may throw exceptions.
char_traits::assign
static void assign(char_type& left, const char_type& right);
static char_type *assign(char_type *first, size_t count,
char_type ch);
The first static member function assigns right to left. The second static member function
assigns ch to each element X[N] for N in the range [0, count).
char_traits::char_type
typedef Elem char_type;
The type is a synonym for the template parameter Elem.
char_traits::compare
static int compare(const char_type *first1,
const char_type *first2, size_t count);
The static member function compares the sequence of length count beginning at first1to the
sequence of the same length beginning at first2. The function returns:
a negative value if the first differing element in first1 (as determined by eq) compares
less than the corresponding element in first2 (as determined by lt)
●
zero if the two compare equal element by element●
a positive value otherwise●
char_traits::copy
static char_type *copy(char_type *first1, const char_type *first2,
size_t count);
The static member function copies the sequence of count elements beginning at first2 to the
array beginning at first1, then returns first1. The source and destination must not overlap.