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[test] Cleanup nullopt_t tests

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* Update specification text from N4387

* Delete not_brace_initializable.fail.cpp: it's redundant with nullopt_t.fail.cpp

* is_empty<T> implies is_class<T>

* is_literal is deprecated; directly verify that we can create a nullopt_t in a constexpr context

Differential Revision: D37024

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@312256 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Casey Carter
2017-08-31 17:56:31 +00:00
parent 90dfa2804a
commit 08242cbd9b
3 changed files with 14 additions and 44 deletions
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8
test/std/utilities/optional/optional.nullopt/nullopt_t.fail.cpp
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@@ -11,15 +11,13 @@
// <optional>
// struct nullopt_t{see below};
// constexpr nullopt_t nullopt(unspecified);
// inline constexpr nullopt_t nullopt(unspecified);
// [optional.nullopt]/2:
// Type nullopt_t shall not have a default constructor or an initializer-list constructor.
// It shall not be an aggregate and shall be a literal type.
// Constant nullopt shall be initialized with an argument of literal type.
// Type nullopt_t shall not have a default constructor or an initializer-list
// constructor, and shall not be an aggregate.
#include <optional>
#include "test_macros.h"
int main()
{