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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
252 lines
8.5 KiB
C++
252 lines
8.5 KiB
C++
//===- llvm/unittest/ADT/ArrayRefTest.cpp - ArrayRef unit tests -----------===//
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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/ArrayRef.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/raw_ostream.h"
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#include "gtest/gtest.h"
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#include <limits>
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#include <vector>
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using namespace llvm;
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// Check that the ArrayRef-of-pointer converting constructor only allows adding
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// cv qualifiers (not removing them, or otherwise changing the type)
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static_assert(
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std::is_convertible<ArrayRef<int *>, ArrayRef<const int *>>::value,
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"Adding const");
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static_assert(
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std::is_convertible<ArrayRef<int *>, ArrayRef<volatile int *>>::value,
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"Adding volatile");
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static_assert(!std::is_convertible<ArrayRef<int *>, ArrayRef<float *>>::value,
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"Changing pointer of one type to a pointer of another");
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static_assert(
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!std::is_convertible<ArrayRef<const int *>, ArrayRef<int *>>::value,
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"Removing const");
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static_assert(
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!std::is_convertible<ArrayRef<volatile int *>, ArrayRef<int *>>::value,
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"Removing volatile");
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// Check that we can't accidentally assign a temporary location to an ArrayRef.
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// (Unfortunately we can't make use of the same thing with constructors.)
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//
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// Disable this check under MSVC; even MSVC 2015 isn't inconsistent between
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// std::is_assignable and actually writing such an assignment.
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#if !defined(_MSC_VER)
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static_assert(
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!std::is_assignable<ArrayRef<int *>&, int *>::value,
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"Assigning from single prvalue element");
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static_assert(
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!std::is_assignable<ArrayRef<int *>&, int * &&>::value,
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"Assigning from single xvalue element");
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static_assert(
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std::is_assignable<ArrayRef<int *>&, int * &>::value,
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"Assigning from single lvalue element");
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static_assert(
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!std::is_assignable<ArrayRef<int *>&, std::initializer_list<int *>>::value,
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"Assigning from an initializer list");
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#endif
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namespace {
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TEST(ArrayRefTest, AllocatorCopy) {
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BumpPtrAllocator Alloc;
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static const uint16_t Words1[] = { 1, 4, 200, 37 };
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ArrayRef<uint16_t> Array1 = makeArrayRef(Words1, 4);
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static const uint16_t Words2[] = { 11, 4003, 67, 64000, 13 };
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ArrayRef<uint16_t> Array2 = makeArrayRef(Words2, 5);
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ArrayRef<uint16_t> Array1c = Array1.copy(Alloc);
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ArrayRef<uint16_t> Array2c = Array2.copy(Alloc);
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EXPECT_TRUE(Array1.equals(Array1c));
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EXPECT_NE(Array1.data(), Array1c.data());
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EXPECT_TRUE(Array2.equals(Array2c));
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EXPECT_NE(Array2.data(), Array2c.data());
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// Check that copy can cope with uninitialized memory.
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struct NonAssignable {
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const char *Ptr;
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NonAssignable(const char *Ptr) : Ptr(Ptr) {}
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NonAssignable(const NonAssignable &RHS) = default;
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void operator=(const NonAssignable &RHS) { assert(RHS.Ptr != nullptr); }
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bool operator==(const NonAssignable &RHS) const { return Ptr == RHS.Ptr; }
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} Array3Src[] = {"hello", "world"};
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ArrayRef<NonAssignable> Array3Copy = makeArrayRef(Array3Src).copy(Alloc);
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EXPECT_EQ(makeArrayRef(Array3Src), Array3Copy);
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EXPECT_NE(makeArrayRef(Array3Src).data(), Array3Copy.data());
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}
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TEST(ArrayRefTest, SizeTSizedOperations) {
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ArrayRef<char> AR(nullptr, std::numeric_limits<ptrdiff_t>::max());
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// Check that drop_back accepts size_t-sized numbers.
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EXPECT_EQ(1U, AR.drop_back(AR.size() - 1).size());
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// Check that drop_front accepts size_t-sized numbers.
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EXPECT_EQ(1U, AR.drop_front(AR.size() - 1).size());
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// Check that slice accepts size_t-sized numbers.
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EXPECT_EQ(1U, AR.slice(AR.size() - 1).size());
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EXPECT_EQ(AR.size() - 1, AR.slice(1, AR.size() - 1).size());
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}
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TEST(ArrayRefTest, DropBack) {
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static const int TheNumbers[] = {4, 8, 15, 16, 23, 42};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> AR2(TheNumbers, AR1.size() - 1);
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EXPECT_TRUE(AR1.drop_back().equals(AR2));
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}
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TEST(ArrayRefTest, DropFront) {
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static const int TheNumbers[] = {4, 8, 15, 16, 23, 42};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> AR2(&TheNumbers[2], AR1.size() - 2);
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EXPECT_TRUE(AR1.drop_front(2).equals(AR2));
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}
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TEST(ArrayRefTest, DropWhile) {
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static const int TheNumbers[] = {1, 3, 5, 8, 10, 11};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> Expected = AR1.drop_front(3);
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EXPECT_EQ(Expected, AR1.drop_while([](const int &N) { return N % 2 == 1; }));
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EXPECT_EQ(AR1, AR1.drop_while([](const int &N) { return N < 0; }));
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EXPECT_EQ(ArrayRef<int>(),
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AR1.drop_while([](const int &N) { return N > 0; }));
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}
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TEST(ArrayRefTest, DropUntil) {
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static const int TheNumbers[] = {1, 3, 5, 8, 10, 11};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> Expected = AR1.drop_front(3);
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EXPECT_EQ(Expected, AR1.drop_until([](const int &N) { return N % 2 == 0; }));
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EXPECT_EQ(ArrayRef<int>(),
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AR1.drop_until([](const int &N) { return N < 0; }));
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EXPECT_EQ(AR1, AR1.drop_until([](const int &N) { return N > 0; }));
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}
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TEST(ArrayRefTest, TakeBack) {
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static const int TheNumbers[] = {4, 8, 15, 16, 23, 42};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> AR2(AR1.end() - 1, 1);
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EXPECT_TRUE(AR1.take_back().equals(AR2));
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}
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TEST(ArrayRefTest, TakeFront) {
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static const int TheNumbers[] = {4, 8, 15, 16, 23, 42};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> AR2(AR1.data(), 2);
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EXPECT_TRUE(AR1.take_front(2).equals(AR2));
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}
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TEST(ArrayRefTest, TakeWhile) {
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static const int TheNumbers[] = {1, 3, 5, 8, 10, 11};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> Expected = AR1.take_front(3);
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EXPECT_EQ(Expected, AR1.take_while([](const int &N) { return N % 2 == 1; }));
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EXPECT_EQ(ArrayRef<int>(),
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AR1.take_while([](const int &N) { return N < 0; }));
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EXPECT_EQ(AR1, AR1.take_while([](const int &N) { return N > 0; }));
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}
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TEST(ArrayRefTest, TakeUntil) {
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static const int TheNumbers[] = {1, 3, 5, 8, 10, 11};
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ArrayRef<int> AR1(TheNumbers);
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ArrayRef<int> Expected = AR1.take_front(3);
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EXPECT_EQ(Expected, AR1.take_until([](const int &N) { return N % 2 == 0; }));
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EXPECT_EQ(AR1, AR1.take_until([](const int &N) { return N < 0; }));
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EXPECT_EQ(ArrayRef<int>(),
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AR1.take_until([](const int &N) { return N > 0; }));
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}
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TEST(ArrayRefTest, Equals) {
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static const int A1[] = {1, 2, 3, 4, 5, 6, 7, 8};
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ArrayRef<int> AR1(A1);
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EXPECT_TRUE(AR1.equals({1, 2, 3, 4, 5, 6, 7, 8}));
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EXPECT_FALSE(AR1.equals({8, 1, 2, 4, 5, 6, 6, 7}));
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EXPECT_FALSE(AR1.equals({2, 4, 5, 6, 6, 7, 8, 1}));
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EXPECT_FALSE(AR1.equals({0, 1, 2, 4, 5, 6, 6, 7}));
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EXPECT_FALSE(AR1.equals({1, 2, 42, 4, 5, 6, 7, 8}));
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EXPECT_FALSE(AR1.equals({42, 2, 3, 4, 5, 6, 7, 8}));
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EXPECT_FALSE(AR1.equals({1, 2, 3, 4, 5, 6, 7, 42}));
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EXPECT_FALSE(AR1.equals({1, 2, 3, 4, 5, 6, 7}));
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EXPECT_FALSE(AR1.equals({1, 2, 3, 4, 5, 6, 7, 8, 9}));
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ArrayRef<int> AR1a = AR1.drop_back();
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EXPECT_TRUE(AR1a.equals({1, 2, 3, 4, 5, 6, 7}));
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EXPECT_FALSE(AR1a.equals({1, 2, 3, 4, 5, 6, 7, 8}));
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ArrayRef<int> AR1b = AR1a.slice(2, 4);
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EXPECT_TRUE(AR1b.equals({3, 4, 5, 6}));
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EXPECT_FALSE(AR1b.equals({2, 3, 4, 5, 6}));
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EXPECT_FALSE(AR1b.equals({3, 4, 5, 6, 7}));
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}
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TEST(ArrayRefTest, EmptyEquals) {
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EXPECT_TRUE(ArrayRef<unsigned>() == ArrayRef<unsigned>());
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}
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TEST(ArrayRefTest, ConstConvert) {
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int buf[4];
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for (int i = 0; i < 4; ++i)
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buf[i] = i;
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static int *A[] = {&buf[0], &buf[1], &buf[2], &buf[3]};
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ArrayRef<const int *> a((ArrayRef<int *>(A)));
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a = ArrayRef<int *>(A);
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}
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static std::vector<int> ReturnTest12() { return {1, 2}; }
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static void ArgTest12(ArrayRef<int> A) {
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EXPECT_EQ(2U, A.size());
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EXPECT_EQ(1, A[0]);
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EXPECT_EQ(2, A[1]);
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}
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TEST(ArrayRefTest, InitializerList) {
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std::initializer_list<int> init_list = { 0, 1, 2, 3, 4 };
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ArrayRef<int> A = init_list;
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for (int i = 0; i < 5; ++i)
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EXPECT_EQ(i, A[i]);
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std::vector<int> B = ReturnTest12();
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A = B;
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EXPECT_EQ(1, A[0]);
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EXPECT_EQ(2, A[1]);
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ArgTest12({1, 2});
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}
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TEST(ArrayRefTest, EmptyInitializerList) {
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ArrayRef<int> A = {};
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EXPECT_TRUE(A.empty());
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A = {};
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EXPECT_TRUE(A.empty());
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}
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// Test that makeArrayRef works on ArrayRef (no-op)
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TEST(ArrayRefTest, makeArrayRef) {
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static const int A1[] = {1, 2, 3, 4, 5, 6, 7, 8};
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// No copy expected for non-const ArrayRef (true no-op)
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ArrayRef<int> AR1(A1);
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ArrayRef<int> &AR1Ref = makeArrayRef(AR1);
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EXPECT_EQ(&AR1, &AR1Ref);
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// A copy is expected for non-const ArrayRef (thin copy)
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const ArrayRef<int> AR2(A1);
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const ArrayRef<int> &AR2Ref = makeArrayRef(AR2);
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EXPECT_NE(&AR2Ref, &AR2);
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EXPECT_TRUE(AR2.equals(AR2Ref));
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}
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} // end anonymous namespace
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