90 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710// UNSUPPORTED: no-localization11// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME12 13// TODO FMT This test should not require std::to_chars(floating-point)14// XFAIL: availability-fp_to_chars-missing15 16// <chrono>17 18// class system_clock;19 20// template<class charT, class traits, class Duration>21// basic_ostream<charT, traits>&22// operator<<(basic_ostream<charT, traits>& os, const local_time<Duration>& tp);23 24// The function uses the system_clock which has two overloads25 26// template<class charT, class traits, class Duration>27// basic_ostream<charT, traits>&28// operator<<(basic_ostream<charT, traits>& os, const sys_time<Duration>& tp);29// Constraints: treat_as_floating_point_v<typename Duration::rep> is false, and Duration{1} < days{1} is true.30 31// template<class charT, class traits>32// basic_ostream<charT, traits>&33// operator<<(basic_ostream<charT, traits>& os, const sys_days& dp);34 35// Note local_time's operator<< is specified a36// Effects: os << sys_time<Duration>{lt.time_since_epoch()};37// since it uses Effects and not Effects: Equivalent to the constrains of38// sys_time do not apply to this operator. This means it's not possible to use39// a SFINAE test.40 41#include <chrono>42#include <ratio>43#include <sstream>44#include <type_traits>45 46void test() {47 std::stringstream sstr;48 49 // floating-point values50 51 sstr << // expected-error@*:* {{invalid operands to binary expression}}52 std::chrono::local_time<std::chrono::duration<float, std::ratio<1, 1>>>{53 std::chrono::duration<float, std::ratio<1, 1>>{0}};54 55 sstr << // expected-error@*:* {{invalid operands to binary expression}}56 std::chrono::local_time<std::chrono::duration<double, std::ratio<1, 1>>>{57 std::chrono::duration<double, std::ratio<1, 1>>{0}};58 59 sstr << // expected-error@*:* {{invalid operands to binary expression}}60 std::chrono::local_time<std::chrono::duration<long double, std::ratio<1, 1>>>{61 std::chrono::duration<long double, std::ratio<1, 1>>{0}};62 63 // duration >= day64 65 sstr << // valid since day has its own formatter66 std::chrono::local_days{std::chrono::days{0}};67 68 using rep = std::conditional_t<std::is_same_v<std::chrono::days::rep, int>, long, int>;69 sstr << // a different rep does not matter,70 std::chrono::local_time<std::chrono::duration<rep, std::ratio<86400>>>{71 std::chrono::duration<rep, std::ratio<86400>>{0}};72 73 sstr << // expected-error@*:* {{invalid operands to binary expression}}74 std::chrono::local_time<std::chrono::duration<typename std::chrono::days::rep, std::ratio<86401>>>{75 std::chrono::duration<typename std::chrono::days::rep, std::ratio<86401>>{0}};76 77 sstr << // These are considered days.78 std::chrono::local_time<std::chrono::weeks>{std::chrono::weeks{3}};79 80 sstr << // These too.81 std::chrono::local_time<std::chrono::duration<rep, std::ratio<20 * 86400>>>{82 std::chrono::duration<rep, std::ratio<20 * 86400>>{0}};83 84 sstr << // expected-error@*:* {{invalid operands to binary expression}}85 std::chrono::local_time<std::chrono::months>{std::chrono::months{0}};86 87 sstr << // expected-error@*:* {{invalid operands to binary expression}}88 std::chrono::local_time<std::chrono::years>{std::chrono::years{0}};89}90