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107 lines
4.1 KiB
107 lines
4.1 KiB
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/template_util.h"
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#include <string>
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#include "base/containers/flat_tree.h"
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#include "base/test/move_only_int.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace {
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enum SimpleEnum { SIMPLE_ENUM };
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enum EnumWithExplicitType : uint64_t { ENUM_WITH_EXPLICIT_TYPE };
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enum class ScopedEnum { SCOPED_ENUM };
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enum class ScopedEnumWithOperator { SCOPED_ENUM_WITH_OPERATOR };
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std::ostream& operator<<(std::ostream& os, ScopedEnumWithOperator v) {
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return os;
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}
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struct SimpleStruct {};
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struct StructWithOperator {};
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std::ostream& operator<<(std::ostream& os, const StructWithOperator& v) {
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return os;
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}
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// is_non_const_reference<Type>
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static_assert(!is_non_const_reference<int>::value, "IsNonConstReference");
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static_assert(!is_non_const_reference<const int&>::value,
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"IsNonConstReference");
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static_assert(is_non_const_reference<int&>::value, "IsNonConstReference");
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// A few standard types that definitely support printing.
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static_assert(internal::SupportsOstreamOperator<int>::value,
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"ints should be printable");
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static_assert(internal::SupportsOstreamOperator<const char*>::value,
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"C strings should be printable");
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static_assert(internal::SupportsOstreamOperator<std::string>::value,
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"std::string should be printable");
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// Various kinds of enums operator<< support.
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static_assert(internal::SupportsOstreamOperator<SimpleEnum>::value,
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"simple enum should be printable by value");
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static_assert(internal::SupportsOstreamOperator<const SimpleEnum&>::value,
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"simple enum should be printable by const ref");
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static_assert(internal::SupportsOstreamOperator<EnumWithExplicitType>::value,
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"enum with explicit type should be printable by value");
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static_assert(
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internal::SupportsOstreamOperator<const EnumWithExplicitType&>::value,
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"enum with explicit type should be printable by const ref");
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static_assert(!internal::SupportsOstreamOperator<ScopedEnum>::value,
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"scoped enum should not be printable by value");
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static_assert(!internal::SupportsOstreamOperator<const ScopedEnum&>::value,
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"simple enum should not be printable by const ref");
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static_assert(internal::SupportsOstreamOperator<ScopedEnumWithOperator>::value,
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"scoped enum with operator<< should be printable by value");
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static_assert(
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internal::SupportsOstreamOperator<const ScopedEnumWithOperator&>::value,
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"scoped enum with operator<< should be printable by const ref");
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// operator<< support on structs.
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static_assert(!internal::SupportsOstreamOperator<SimpleStruct>::value,
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"simple struct should not be printable by value");
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static_assert(!internal::SupportsOstreamOperator<const SimpleStruct&>::value,
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"simple struct should not be printable by const ref");
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static_assert(internal::SupportsOstreamOperator<StructWithOperator>::value,
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"struct with operator<< should be printable by value");
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static_assert(
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internal::SupportsOstreamOperator<const StructWithOperator&>::value,
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"struct with operator<< should be printable by const ref");
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// base::is_trivially_copyable
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class TrivialCopy {
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public:
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TrivialCopy(int d) : data_(d) {}
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protected:
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int data_;
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};
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class TrivialCopyButWithDestructor : public TrivialCopy {
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public:
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TrivialCopyButWithDestructor(int d) : TrivialCopy(d) {}
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~TrivialCopyButWithDestructor() { data_ = 0; }
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};
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static_assert(base::is_trivially_copyable<TrivialCopy>::value,
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"TrivialCopy should be detected as trivially copyable");
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static_assert(!base::is_trivially_copyable<TrivialCopyButWithDestructor>::value,
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"TrivialCopyButWithDestructor should not be detected as "
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"trivially copyable");
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class NoCopy {
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public:
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NoCopy(const NoCopy&) = delete;
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};
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static_assert(
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!base::is_trivially_copy_constructible<std::vector<NoCopy>>::value,
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"is_trivially_copy_constructible<std::vector<T>> must be compiled.");
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} // namespace
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} // namespace base
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