xtd::ustring::ustring | ( | const ustring & | str, |
size_t | index, | ||
const allocator_type & | allocator | ||
) |
Initializes a new instance of xtd::ustring with specified substring at index and allocator.
str | The string to copy. |
index | The index of the first substring character where start copy. |
allocator | The allocator to use for all memory allocations of this string. |