int compare(basic_string_view<charT, traits> sv) const noexcept;
Effects: Determines the effective length rlen of the strings to compare as the smaller of size() and sv.size(). The function then compares the two strings by calling traits::compare(data(), sv.data(), rlen).
Returns: The nonzero result if the result of the comparison is nonzero. Otherwise, returns a value as indicated in Table [tab:strings.compare].
| Condition | Return Value |
| size() < sv.size() | < 0 |
| size() == sv.size() | 0 |
| size() > sv.size() | > 0 |
int compare(size_type pos1, size_type n1,
basic_string_view<charT, traits> sv) const;
Effects: Equivalent to:
return basic_string_view<charT, traits>(data(), size()).substr(pos1, n1).compare(sv);
template<class T>
int compare(size_type pos1, size_type n1, const T& t,
size_type pos2, size_type n2 = npos) const;
Effects: Equivalent to:
basic_string_view<charT, traits> sv = t; return basic_string_view<charT, traits>(data(), size()).substr(pos1, n1).compare(sv.substr(pos2, n2));
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.
int compare(const basic_string& str) const noexcept;
Effects: Equivalent to: return compare(basic_string_view<charT, traits>(str));
int compare(size_type pos1, size_type n1,
const basic_string& str) const;
Effects: Equivalent to: return compare(pos1, n1, basic_string_view<charT, traits>(str));
int compare(size_type pos1, size_type n1,
const basic_string& str,
size_type pos2, size_type n2 = npos) const;
Effects: Equivalent to:
return compare(pos1, n1, basic_string_view<charT, traits>(str), pos2, n2);
int compare(const charT* s) const;
Returns: compare(basic_string(s)).
int compare(size_type pos, size_type n1,
const charT* s) const;
Returns: basic_string(*this, pos, n1).compare(basic_string(s)).
int compare(size_type pos, size_type n1,
const charT* s, size_type n2) const;
Returns: basic_string(*this, pos, n1).compare(basic_string(s, n2)).