Abseil Common Libraries (C++) (grcp 依赖)
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77 lines
2.2 KiB
77 lines
2.2 KiB
// Copyright 2020 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include "gtest/gtest.h" |
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#include "absl/base/optimization.h" |
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#include "absl/strings/string_view.h" |
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// This test by itself does not do anything fancy, but it serves as binary I can |
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// query in shell test. |
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namespace { |
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template <class T> |
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void DoNotOptimize(const T& var) { |
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#ifdef __GNUC__ |
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asm volatile("" : "+m"(const_cast<T&>(var))); |
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#else |
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std::cout << (void*)&var; |
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#endif |
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} |
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int very_long_int_variable_name ABSL_INTERNAL_UNIQUE_SMALL_NAME() = 0; |
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char very_long_str_variable_name[] ABSL_INTERNAL_UNIQUE_SMALL_NAME() = "abc"; |
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TEST(UniqueSmallName, NonAutomaticVar) { |
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EXPECT_EQ(very_long_int_variable_name, 0); |
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EXPECT_EQ(absl::string_view(very_long_str_variable_name), "abc"); |
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} |
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int VeryLongFreeFunctionName() ABSL_INTERNAL_UNIQUE_SMALL_NAME(); |
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TEST(UniqueSmallName, FreeFunction) { |
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DoNotOptimize(&VeryLongFreeFunctionName); |
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EXPECT_EQ(VeryLongFreeFunctionName(), 456); |
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} |
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int VeryLongFreeFunctionName() { return 456; } |
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struct VeryLongStructName { |
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explicit VeryLongStructName(int i); |
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int VeryLongMethodName() ABSL_INTERNAL_UNIQUE_SMALL_NAME(); |
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static int VeryLongStaticMethodName() ABSL_INTERNAL_UNIQUE_SMALL_NAME(); |
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private: |
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int fld; |
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}; |
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TEST(UniqueSmallName, Struct) { |
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VeryLongStructName var(10); |
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DoNotOptimize(var); |
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DoNotOptimize(&VeryLongStructName::VeryLongMethodName); |
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DoNotOptimize(&VeryLongStructName::VeryLongStaticMethodName); |
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EXPECT_EQ(var.VeryLongMethodName(), 10); |
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EXPECT_EQ(VeryLongStructName::VeryLongStaticMethodName(), 123); |
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} |
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VeryLongStructName::VeryLongStructName(int i) : fld(i) {} |
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int VeryLongStructName::VeryLongMethodName() { return fld; } |
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int VeryLongStructName::VeryLongStaticMethodName() { return 123; } |
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} // namespace
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