24 Strings library [strings]

24.3 String classes [string.classes]

24.3.2 Class template basic_­string [basic.string]

24.3.2.6 basic_­string modifiers [string.modifiers]

24.3.2.6.2 basic_­string​::​append [string.append]

basic_string& append(const basic_string& str);
Effects: Calls append(str.data(), str.size()).
Returns: *this.
basic_string& append(const basic_string& str, size_type pos, size_type n = npos);
Throws: out_­of_­range if pos > str.size().
Effects: Determines the effective length rlen of the string to append as the smaller of n and str.size() - pos and calls append(str.data() + pos, rlen).
Returns: *this.
basic_string& append(basic_string_view<charT, traits> sv);
Effects: Equivalent to: return append(sv.data(), sv.size());
template<class T> basic_string& append(const T& t, size_type pos, size_type n = npos);
Throws: out_­of_­range if pos > sv.size().
Effects: Creates a variable, sv, as if by basic_­string_­view<charT, traits> sv = t.
Determines the effective length rlen of the string to append as the smaller of n and sv.size() - pos and calls append(sv.data() + pos, rlen).
Remarks: This function shall not participate in overload resolution unless is_­convertible_­v<const T&, basic_­string_­view<charT, traits>> is true and is_­convertible_­v<const T&, const charT*> is false.
Returns: *this.
basic_string& append(const charT* s, size_type n);
Requires: s points to an array of at least n elements of charT.
Throws: length_­error if size() + n > max_­size().
Effects: The function replaces the string controlled by *this with a string of length size() + n whose first size() elements are a copy of the original string controlled by *this and whose remaining elements are a copy of the initial n elements of s.
Returns: *this.
basic_string& append(const charT* s);
Requires: s points to an array of at least traits​::​length(s) + 1 elements of charT.
Effects: Calls append(s, traits​::​length(s)).
Returns: *this.
basic_string& append(size_type n, charT c);
Effects: Equivalent to: return append(basic_­string(n, c));
template<class InputIterator> basic_string& append(InputIterator first, InputIterator last);
Requires: [first, last) is a valid range.
Effects: Equivalent to: return append(basic_­string(first, last, get_­allocator()));
basic_string& append(initializer_list<charT> il);
Effects: Calls append(il.begin(), il.size()).
Returns: *this.
void push_back(charT c);
Effects: Equivalent to append(static_­cast<size_­type>(1), c).