size_type copy(charT* s, size_type n, size_type pos = 0) const;
Let rlen be the smaller of n and size() - pos.
Throws:
out_of_range if pos > size().
Requires:
[s, s + rlen) is a valid range.
Effects:
Equivalent to traits::copy(s, data() + pos, rlen).
constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const;
Let rlen be the smaller of n and size() - pos.
Throws:
out_of_range if pos > size().
Effects:
Determines rlen, the effective length of the string to reference.
Returns:
basic_string_view(data() + pos, rlen).
constexpr int compare(basic_string_view str) const noexcept;
Let rlen be the smaller of size() and str.size().
Effects:
Determines rlen, the effective length of the strings to compare.
The function then compares the two strings by calling traits::compare(data(), str.data(), rlen).
Returns:
The nonzero result if the result of the comparison is nonzero.
Otherwise, returns a value as indicated in Table 66.
Table
66 —
compare() results
| Condition | Return Value |
| size() < str.size() | < 0 |
|
size() == str.size() | 0 |
|
size() > str.size() | > 0 |
constexpr int compare(size_type pos1, size_type n1, basic_string_view str) const;
Effects:
Equivalent to: return substr(pos1, n1).compare(str);
constexpr int compare(size_type pos1, size_type n1, basic_string_view str,
size_type pos2, size_type n2) const;
Effects:
Equivalent to: return substr(pos1, n1).compare(str.substr(pos2, n2));
constexpr int compare(const charT* s) const;
Effects:
Equivalent to: return compare(basic_string_view(s));
constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
Effects:
Equivalent to: return substr(pos1, n1).compare(basic_string_view(s));
constexpr int compare(size_type pos1, size_type n1,
const charT* s, size_type n2) const;
Effects:
Equivalent to: return substr(pos1, n1).compare(basic_string_view(s, n2));