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Make sure unit isn't null before constructing a string_view from it

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This commit is contained in:
zeffy 2020-01-23 17:28:20 -08:00
parent 3aae6d2350
commit 708c28b952
1 changed files with 4 additions and 3 deletions
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7
include/fmt/chrono.h
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@ -771,12 +771,13 @@ OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
template <typename Char, typename Period, typename OutputIt>
OutputIt format_duration_unit(OutputIt out) {
if (string_view unit = get_units<Period>()) {
if (const char* unit = get_units<Period>()) {
string_view s(unit);
if (const_check(std::is_same<Char, wchar_t>())) {
utf8_to_utf16 u(unit);
utf8_to_utf16 u(s);
return std::copy(u.c_str(), u.c_str() + u.size(), out);
}
return std::copy(unit.begin(), unit.end(), out);
return std::copy(s.begin(), s.end(), out);
}
const Char num_f[]{'[', '{', '}', ']', 's', 0};
if (Period::den == 1) return format_to(out, num_f, Period::num);