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6bae49b565
This is (more?) usable by GDB pretty printers and seems nicer to write. There's one tricky caveat that in C++14 (LLVM's codebase today) the static constexpr member declaration is not a definition - so odr use of this constant requires an out of line definition, which won't be provided (that'd make all these trait classes more annoyidng/expensive to maintain). But the use of this constant in the library implementation is/should always be in a non-odr context - only two unit tests needed to be touched to cope with this/avoid odr using these constants. Based on/expanded from D72590 by Christian Sigg.
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
//===- llvm/unittest/ADT/PointerEmbeddedIntTest.cpp -----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/PointerEmbeddedInt.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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TEST(PointerEmbeddedIntTest, Basic) {
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PointerEmbeddedInt<int, CHAR_BIT> I = 42, J = 43;
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EXPECT_EQ(42, I);
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EXPECT_EQ(43, I + 1);
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EXPECT_EQ((int)sizeof(uintptr_t) * CHAR_BIT - CHAR_BIT,
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(int)PointerLikeTypeTraits<decltype(I)>::NumLowBitsAvailable);
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EXPECT_FALSE(I == J);
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EXPECT_TRUE(I != J);
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EXPECT_TRUE(I < J);
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EXPECT_FALSE(I > J);
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EXPECT_TRUE(I <= J);
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EXPECT_FALSE(I >= J);
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EXPECT_FALSE(I == 43);
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EXPECT_TRUE(I != 43);
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EXPECT_TRUE(I < 43);
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EXPECT_FALSE(I > 43);
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EXPECT_TRUE(I <= 43);
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EXPECT_FALSE(I >= 43);
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EXPECT_FALSE(42 == J);
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EXPECT_TRUE(42 != J);
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EXPECT_TRUE(42 < J);
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EXPECT_FALSE(42 > J);
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EXPECT_TRUE(42 <= J);
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EXPECT_FALSE(42 >= J);
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}
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TEST(PointerEmbeddedIntTest, intptr_t) {
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PointerEmbeddedInt<intptr_t, CHAR_BIT> IPos = 42, INeg = -42;
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EXPECT_EQ(42, IPos);
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EXPECT_EQ(-42, INeg);
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PointerEmbeddedInt<uintptr_t, CHAR_BIT> U = 42, USaturated = 255;
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EXPECT_EQ(42U, U);
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EXPECT_EQ(255U, USaturated);
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PointerEmbeddedInt<intptr_t, std::numeric_limits<intptr_t>::digits>
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IMax = std::numeric_limits<intptr_t>::max() >> 1,
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IMin = std::numeric_limits<intptr_t>::min() >> 1;
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EXPECT_EQ(std::numeric_limits<intptr_t>::max() >> 1, IMax);
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EXPECT_EQ(std::numeric_limits<intptr_t>::min() >> 1, IMin);
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PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1>
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UMax = std::numeric_limits<uintptr_t>::max() >> 1,
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UMin = std::numeric_limits<uintptr_t>::min() >> 1;
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EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1, UMax);
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EXPECT_EQ(std::numeric_limits<uintptr_t>::min() >> 1, UMin);
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}
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TEST(PointerEmbeddedIntTest, PointerLikeTypeTraits) {
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PointerEmbeddedInt<int, CHAR_BIT> I = 42;
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using ITraits = PointerLikeTypeTraits<decltype(I)>;
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EXPECT_EQ(42, ITraits::getFromVoidPointer(ITraits::getAsVoidPointer(I)));
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PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1>
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Max = std::numeric_limits<uintptr_t>::max() >> 1;
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using MaxTraits = PointerLikeTypeTraits<decltype(Max)>;
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EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1,
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MaxTraits::getFromVoidPointer(MaxTraits::getAsVoidPointer(Max)));
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}
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} // end anonymous namespace
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