75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
// Copyright 2012 The Chromium Authors
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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 <stdint.h>
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#include <string>
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#include <type_traits>
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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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struct SimpleStruct {};
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struct StructWithToString {
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std::string ToString() const { return ""; }
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};
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// .ToString() support on structs.
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static_assert(!internal::SupportsToString<SimpleStruct>::value,
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"simple struct value doesn't support .ToString()");
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static_assert(!internal::SupportsToString<const SimpleStruct&>::value,
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"simple struct const ref doesn't support .ToString()");
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static_assert(internal::SupportsToString<StructWithToString>::value,
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"struct with .ToString() should be printable by value");
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static_assert(internal::SupportsToString<const StructWithToString&>::value,
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"struct with .ToString() should be printable by const ref");
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// is_scoped_enum
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TEST(TemplateUtil, IsScopedEnum) {
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static_assert(!is_scoped_enum<int>::value, "");
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static_assert(!is_scoped_enum<SimpleEnum>::value, "");
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static_assert(!is_scoped_enum<EnumWithExplicitType>::value, "");
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static_assert(is_scoped_enum<ScopedEnum>::value, "");
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}
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TEST(TemplateUtil, RemoveCvRefT) {
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static_assert(std::is_same<int, remove_cvref_t<const int>>::value, "");
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static_assert(std::is_same<int, remove_cvref_t<const volatile int>>::value,
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"");
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static_assert(std::is_same<int, remove_cvref_t<int&>>::value, "");
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static_assert(std::is_same<int, remove_cvref_t<const int&>>::value, "");
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static_assert(std::is_same<int, remove_cvref_t<const volatile int&>>::value,
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"");
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static_assert(std::is_same<int, remove_cvref_t<int&&>>::value, "");
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static_assert(
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std::is_same<SimpleStruct, remove_cvref_t<const SimpleStruct&>>::value,
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"");
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static_assert(std::is_same<int*, remove_cvref_t<int*>>::value, "");
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// Test references and pointers to arrays.
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static_assert(std::is_same<int[3], remove_cvref_t<int[3]>>::value, "");
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static_assert(std::is_same<int[3], remove_cvref_t<int(&)[3]>>::value, "");
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static_assert(std::is_same<int(*)[3], remove_cvref_t<int(*)[3]>>::value, "");
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// Test references and pointers to functions.
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static_assert(std::is_same<void(int), remove_cvref_t<void(int)>>::value, "");
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static_assert(std::is_same<void(int), remove_cvref_t<void (&)(int)>>::value,
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"");
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static_assert(
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std::is_same<void (*)(int), remove_cvref_t<void (*)(int)>>::value, "");
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}
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} // namespace
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} // namespace base
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