Revert r344529 "Implement the first part of the calendar support for C++20"

Revert r344535 "Wrap up the new chrono literals in an #ifdef..."
Revert r344546 "Mark a couple of test cases as 'C++17-only'..."

Some of the buildbot failures were masked by another error,
and this one was probably missed.

llvm-svn: 344580

1 files changed, 0 insertions, 106 deletions

diff --git a/libcxx/test/std/utilities/time/time.cal/time.cal.ym/time.cal.ym.nonmembers/plus.pass.cpp b/libcxx/test/std/utilities/time/time.cal/time.cal.ym/time.cal.ym.nonmembers/plus.pass.cpp
deleted file mode 100644
index acf93ef1883..00000000000
--- a/libcxx/test/std/utilities/time/time.cal/time.cal.ym/time.cal.ym.nonmembers/plus.pass.cpp
+++ /dev/null
@@ -1,106 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-// UNSUPPORTED: c++03, c++11, c++14, c++17
-
-// <chrono>
-// class year_month;
-
-// constexpr year_month operator+(const year_month& ym, const years& dy) noexcept;
-// Returns: (ym.year() + dy) / ym.month().
-// 
-// constexpr year_month operator+(const years& dy, const year_month& ym) noexcept;
-// Returns: ym + dy.
-//
-// constexpr year_month operator+(const year_month& ym, const months& dm) noexcept;
-// Returns: A year_month value z such that z - ym == dm. 
-// Complexity: O(1) with respect to the value of dm.
-// 
-// constexpr year_month operator+(const months& dm, const year_month& ym) noexcept;
-// Returns: ym + dm.
-
-
-
-#include <chrono>
-#include <type_traits>
-#include <cassert>
-
-#include "test_macros.h"
-
-constexpr bool testConstexprYears(std::chrono::year_month ym)
-{
-    std::chrono::years offset{23};
-    if (static_cast<int>((ym         ).year()) !=  1) return false;
-    if (static_cast<int>((ym + offset).year()) != 24) return false;
-    if (static_cast<int>((offset + ym).year()) != 24) return false;
-    return true;
-}
-
-
-constexpr bool testConstexprMonths(std::chrono::year_month ym)
-{
-    std::chrono::months offset{6};
-    if (static_cast<unsigned>((ym         ).month()) !=  1) return false;
-    if (static_cast<unsigned>((ym + offset).month()) !=  7) return false;
-    if (static_cast<unsigned>((offset + ym).month()) !=  7) return false;
-    return true;
-}
-
-
-int main()
-{
-    using year       = std::chrono::year;
-    using years      = std::chrono::years;
-    using month      = std::chrono::month;
-    using months     = std::chrono::months;
-    using year_month = std::chrono::year_month;
-
-    {   // year_month + years
-    ASSERT_NOEXCEPT(std::declval<year_month>() + std::declval<years>());
-    ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month>());
-
-    ASSERT_SAME_TYPE(year_month, decltype(std::declval<year_month>() + std::declval<years>()));
-    ASSERT_SAME_TYPE(year_month, decltype(std::declval<years>() + std::declval<year_month>()));
-    
-    static_assert(testConstexprYears (year_month{year{1}, month{1}}), "");
-
-    year_month ym{year{1234}, std::chrono::January};
-    for (int i = 0; i <= 10; ++i)
-    {
-        year_month ym1 = ym + years{i};
-        year_month ym2 = years{i} + ym;
-        assert(static_cast<int>(ym1.year()) == i + 1234);
-        assert(static_cast<int>(ym2.year()) == i + 1234);
-        assert(ym1.month() == std::chrono::January);
-        assert(ym2.month() == std::chrono::January);
-        assert(ym1 == ym2);
-    }
-    }
-
-    {   // year_month + months
-    ASSERT_NOEXCEPT(std::declval<year_month>() + std::declval<months>());
-    ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month>());
-
-    ASSERT_SAME_TYPE(year_month, decltype(std::declval<year_month>() + std::declval<months>()));
-    ASSERT_SAME_TYPE(year_month, decltype(std::declval<months>() + std::declval<year_month>()));
-
-    static_assert(testConstexprMonths(year_month{year{1}, month{1}}), "");
-
-    year_month ym{year{1234}, std::chrono::January};
-    for (int i = 0; i <= 10; ++i)  // TODO test wrap-around
-    {
-        year_month ym1 = ym + months{i};
-        year_month ym2 = months{i} + ym;
-        assert(static_cast<int>(ym1.year()) == 1234);
-        assert(static_cast<int>(ym2.year()) == 1234);
-        assert(ym1.month() == month(1 + i));
-        assert(ym2.month() == month(1 + i));
-        assert(ym1 == ym2);
-    }
-    }
-}