Method substr

src/fl/stl/string.cpp.hpp:161–174

}

string string::substr(fl::size start, fl::size length) const FL_NOEXCEPT {
    // Handle `npos` / overflow: when `length == npos` the caller
    // means "to end of string", and when `length` is large enough
    // that `start + length` would wrap, we clamp to the end before
    // the addition can overflow.
    fl::size end;
    if (length == npos || length > size() - (start < size() ? start : size())) {
        end = size();
    } else {
        end = start + length;
        if (end > size()) end = size();
    }
    return substring(start, end);
}

string string::substr(fl::size start) const FL_NOEXCEPT {
    return substring(start, size());