forked from OSchip/llvm-project
466 lines
14 KiB
C++
466 lines
14 KiB
C++
//===- IteratorTest.cpp - Unit tests for iterator utilities ---------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/ilist.h"
|
|
#include "llvm/ADT/iterator.h"
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
template <int> struct Shadow;
|
|
|
|
struct WeirdIter : std::iterator<std::input_iterator_tag, Shadow<0>, Shadow<1>,
|
|
Shadow<2>, Shadow<3>> {};
|
|
|
|
struct AdaptedIter : iterator_adaptor_base<AdaptedIter, WeirdIter> {};
|
|
|
|
// Test that iterator_adaptor_base forwards typedefs, if value_type is
|
|
// unchanged.
|
|
static_assert(std::is_same<typename AdaptedIter::value_type, Shadow<0>>::value,
|
|
"");
|
|
static_assert(
|
|
std::is_same<typename AdaptedIter::difference_type, Shadow<1>>::value, "");
|
|
static_assert(std::is_same<typename AdaptedIter::pointer, Shadow<2>>::value,
|
|
"");
|
|
static_assert(std::is_same<typename AdaptedIter::reference, Shadow<3>>::value,
|
|
"");
|
|
|
|
// Ensure that pointe{e,r}_iterator adaptors correctly forward the category of
|
|
// the underlying iterator.
|
|
|
|
using RandomAccessIter = SmallVectorImpl<int*>::iterator;
|
|
using BidiIter = ilist<int*>::iterator;
|
|
|
|
template<class T>
|
|
using pointee_iterator_defaulted = pointee_iterator<T>;
|
|
template<class T>
|
|
using pointer_iterator_defaulted = pointer_iterator<T>;
|
|
|
|
// Ensures that an iterator and its adaptation have the same iterator_category.
|
|
template<template<typename> class A, typename It>
|
|
using IsAdaptedIterCategorySame =
|
|
std::is_same<typename std::iterator_traits<It>::iterator_category,
|
|
typename std::iterator_traits<A<It>>::iterator_category>;
|
|
|
|
// pointeE_iterator
|
|
static_assert(IsAdaptedIterCategorySame<pointee_iterator_defaulted,
|
|
RandomAccessIter>::value, "");
|
|
static_assert(IsAdaptedIterCategorySame<pointee_iterator_defaulted,
|
|
BidiIter>::value, "");
|
|
// pointeR_iterator
|
|
static_assert(IsAdaptedIterCategorySame<pointer_iterator_defaulted,
|
|
RandomAccessIter>::value, "");
|
|
static_assert(IsAdaptedIterCategorySame<pointer_iterator_defaulted,
|
|
BidiIter>::value, "");
|
|
|
|
TEST(PointeeIteratorTest, Basic) {
|
|
int arr[4] = {1, 2, 3, 4};
|
|
SmallVector<int *, 4> V;
|
|
V.push_back(&arr[0]);
|
|
V.push_back(&arr[1]);
|
|
V.push_back(&arr[2]);
|
|
V.push_back(&arr[3]);
|
|
|
|
typedef pointee_iterator<SmallVectorImpl<int *>::const_iterator>
|
|
test_iterator;
|
|
|
|
test_iterator Begin, End;
|
|
Begin = V.begin();
|
|
End = test_iterator(V.end());
|
|
|
|
test_iterator I = Begin;
|
|
for (int i = 0; i < 4; ++i) {
|
|
EXPECT_EQ(*V[i], *I);
|
|
|
|
EXPECT_EQ(I, Begin + i);
|
|
EXPECT_EQ(I, std::next(Begin, i));
|
|
test_iterator J = Begin;
|
|
J += i;
|
|
EXPECT_EQ(I, J);
|
|
EXPECT_EQ(*V[i], Begin[i]);
|
|
|
|
EXPECT_NE(I, End);
|
|
EXPECT_GT(End, I);
|
|
EXPECT_LT(I, End);
|
|
EXPECT_GE(I, Begin);
|
|
EXPECT_LE(Begin, I);
|
|
|
|
EXPECT_EQ(i, I - Begin);
|
|
EXPECT_EQ(i, std::distance(Begin, I));
|
|
EXPECT_EQ(Begin, I - i);
|
|
|
|
test_iterator K = I++;
|
|
EXPECT_EQ(K, std::prev(I));
|
|
}
|
|
EXPECT_EQ(End, I);
|
|
}
|
|
|
|
TEST(PointeeIteratorTest, SmartPointer) {
|
|
SmallVector<std::unique_ptr<int>, 4> V;
|
|
V.push_back(std::make_unique<int>(1));
|
|
V.push_back(std::make_unique<int>(2));
|
|
V.push_back(std::make_unique<int>(3));
|
|
V.push_back(std::make_unique<int>(4));
|
|
|
|
typedef pointee_iterator<
|
|
SmallVectorImpl<std::unique_ptr<int>>::const_iterator>
|
|
test_iterator;
|
|
|
|
test_iterator Begin, End;
|
|
Begin = V.begin();
|
|
End = test_iterator(V.end());
|
|
|
|
test_iterator I = Begin;
|
|
for (int i = 0; i < 4; ++i) {
|
|
EXPECT_EQ(*V[i], *I);
|
|
|
|
EXPECT_EQ(I, Begin + i);
|
|
EXPECT_EQ(I, std::next(Begin, i));
|
|
test_iterator J = Begin;
|
|
J += i;
|
|
EXPECT_EQ(I, J);
|
|
EXPECT_EQ(*V[i], Begin[i]);
|
|
|
|
EXPECT_NE(I, End);
|
|
EXPECT_GT(End, I);
|
|
EXPECT_LT(I, End);
|
|
EXPECT_GE(I, Begin);
|
|
EXPECT_LE(Begin, I);
|
|
|
|
EXPECT_EQ(i, I - Begin);
|
|
EXPECT_EQ(i, std::distance(Begin, I));
|
|
EXPECT_EQ(Begin, I - i);
|
|
|
|
test_iterator K = I++;
|
|
EXPECT_EQ(K, std::prev(I));
|
|
}
|
|
EXPECT_EQ(End, I);
|
|
}
|
|
|
|
TEST(PointeeIteratorTest, Range) {
|
|
int A[] = {1, 2, 3, 4};
|
|
SmallVector<int *, 4> V{&A[0], &A[1], &A[2], &A[3]};
|
|
|
|
int I = 0;
|
|
for (int II : make_pointee_range(V))
|
|
EXPECT_EQ(A[I++], II);
|
|
}
|
|
|
|
TEST(PointeeIteratorTest, PointeeType) {
|
|
struct S {
|
|
int X;
|
|
bool operator==(const S &RHS) const { return X == RHS.X; };
|
|
};
|
|
S A[] = {S{0}, S{1}};
|
|
SmallVector<S *, 2> V{&A[0], &A[1]};
|
|
|
|
pointee_iterator<SmallVectorImpl<S *>::const_iterator, const S> I = V.begin();
|
|
for (int j = 0; j < 2; ++j, ++I) {
|
|
EXPECT_EQ(*V[j], *I);
|
|
}
|
|
}
|
|
|
|
TEST(FilterIteratorTest, Lambda) {
|
|
auto IsOdd = [](int N) { return N % 2 == 1; };
|
|
int A[] = {0, 1, 2, 3, 4, 5, 6};
|
|
auto Range = make_filter_range(A, IsOdd);
|
|
SmallVector<int, 3> Actual(Range.begin(), Range.end());
|
|
EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
|
|
}
|
|
|
|
TEST(FilterIteratorTest, CallableObject) {
|
|
int Counter = 0;
|
|
struct Callable {
|
|
int &Counter;
|
|
|
|
Callable(int &Counter) : Counter(Counter) {}
|
|
|
|
bool operator()(int N) {
|
|
Counter++;
|
|
return N % 2 == 1;
|
|
}
|
|
};
|
|
Callable IsOdd(Counter);
|
|
int A[] = {0, 1, 2, 3, 4, 5, 6};
|
|
auto Range = make_filter_range(A, IsOdd);
|
|
EXPECT_EQ(2, Counter);
|
|
SmallVector<int, 3> Actual(Range.begin(), Range.end());
|
|
EXPECT_GE(Counter, 7);
|
|
EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
|
|
}
|
|
|
|
TEST(FilterIteratorTest, FunctionPointer) {
|
|
bool (*IsOdd)(int) = [](int N) { return N % 2 == 1; };
|
|
int A[] = {0, 1, 2, 3, 4, 5, 6};
|
|
auto Range = make_filter_range(A, IsOdd);
|
|
SmallVector<int, 3> Actual(Range.begin(), Range.end());
|
|
EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
|
|
}
|
|
|
|
TEST(FilterIteratorTest, Composition) {
|
|
auto IsOdd = [](int N) { return N % 2 == 1; };
|
|
std::unique_ptr<int> A[] = {std::make_unique<int>(0), std::make_unique<int>(1),
|
|
std::make_unique<int>(2), std::make_unique<int>(3),
|
|
std::make_unique<int>(4), std::make_unique<int>(5),
|
|
std::make_unique<int>(6)};
|
|
using PointeeIterator = pointee_iterator<std::unique_ptr<int> *>;
|
|
auto Range = make_filter_range(
|
|
make_range(PointeeIterator(std::begin(A)), PointeeIterator(std::end(A))),
|
|
IsOdd);
|
|
SmallVector<int, 3> Actual(Range.begin(), Range.end());
|
|
EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
|
|
}
|
|
|
|
TEST(FilterIteratorTest, InputIterator) {
|
|
struct InputIterator
|
|
: iterator_adaptor_base<InputIterator, int *, std::input_iterator_tag> {
|
|
using BaseT =
|
|
iterator_adaptor_base<InputIterator, int *, std::input_iterator_tag>;
|
|
|
|
InputIterator(int *It) : BaseT(It) {}
|
|
};
|
|
|
|
auto IsOdd = [](int N) { return N % 2 == 1; };
|
|
int A[] = {0, 1, 2, 3, 4, 5, 6};
|
|
auto Range = make_filter_range(
|
|
make_range(InputIterator(std::begin(A)), InputIterator(std::end(A))),
|
|
IsOdd);
|
|
SmallVector<int, 3> Actual(Range.begin(), Range.end());
|
|
EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
|
|
}
|
|
|
|
TEST(FilterIteratorTest, ReverseFilterRange) {
|
|
auto IsOdd = [](int N) { return N % 2 == 1; };
|
|
int A[] = {0, 1, 2, 3, 4, 5, 6};
|
|
|
|
// Check basic reversal.
|
|
auto Range = reverse(make_filter_range(A, IsOdd));
|
|
SmallVector<int, 3> Actual(Range.begin(), Range.end());
|
|
EXPECT_EQ((SmallVector<int, 3>{5, 3, 1}), Actual);
|
|
|
|
// Check that the reverse of the reverse is the original.
|
|
auto Range2 = reverse(reverse(make_filter_range(A, IsOdd)));
|
|
SmallVector<int, 3> Actual2(Range2.begin(), Range2.end());
|
|
EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual2);
|
|
|
|
// Check empty ranges.
|
|
auto Range3 = reverse(make_filter_range(ArrayRef<int>(), IsOdd));
|
|
SmallVector<int, 0> Actual3(Range3.begin(), Range3.end());
|
|
EXPECT_EQ((SmallVector<int, 0>{}), Actual3);
|
|
|
|
// Check that we don't skip the first element, provided it isn't filtered
|
|
// away.
|
|
auto IsEven = [](int N) { return N % 2 == 0; };
|
|
auto Range4 = reverse(make_filter_range(A, IsEven));
|
|
SmallVector<int, 4> Actual4(Range4.begin(), Range4.end());
|
|
EXPECT_EQ((SmallVector<int, 4>{6, 4, 2, 0}), Actual4);
|
|
}
|
|
|
|
TEST(PointerIterator, Basic) {
|
|
int A[] = {1, 2, 3, 4};
|
|
pointer_iterator<int *> Begin(std::begin(A)), End(std::end(A));
|
|
EXPECT_EQ(A, *Begin);
|
|
++Begin;
|
|
EXPECT_EQ(A + 1, *Begin);
|
|
++Begin;
|
|
EXPECT_EQ(A + 2, *Begin);
|
|
++Begin;
|
|
EXPECT_EQ(A + 3, *Begin);
|
|
++Begin;
|
|
EXPECT_EQ(Begin, End);
|
|
}
|
|
|
|
TEST(PointerIterator, Const) {
|
|
int A[] = {1, 2, 3, 4};
|
|
const pointer_iterator<int *> Begin(std::begin(A));
|
|
EXPECT_EQ(A, *Begin);
|
|
EXPECT_EQ(A + 1, std::next(*Begin, 1));
|
|
EXPECT_EQ(A + 2, std::next(*Begin, 2));
|
|
EXPECT_EQ(A + 3, std::next(*Begin, 3));
|
|
EXPECT_EQ(A + 4, std::next(*Begin, 4));
|
|
}
|
|
|
|
TEST(PointerIterator, Range) {
|
|
int A[] = {1, 2, 3, 4};
|
|
int I = 0;
|
|
for (int *P : make_pointer_range(A))
|
|
EXPECT_EQ(A + I++, P);
|
|
}
|
|
|
|
TEST(ZipIteratorTest, Basic) {
|
|
using namespace std;
|
|
const SmallVector<unsigned, 6> pi{3, 1, 4, 1, 5, 9};
|
|
SmallVector<bool, 6> odd{1, 1, 0, 1, 1, 1};
|
|
const char message[] = "yynyyy\0";
|
|
|
|
for (auto tup : zip(pi, odd, message)) {
|
|
EXPECT_EQ(get<0>(tup) & 0x01, get<1>(tup));
|
|
EXPECT_EQ(get<0>(tup) & 0x01 ? 'y' : 'n', get<2>(tup));
|
|
}
|
|
|
|
// note the rvalue
|
|
for (auto tup : zip(pi, SmallVector<bool, 0>{1, 1, 0, 1, 1})) {
|
|
EXPECT_EQ(get<0>(tup) & 0x01, get<1>(tup));
|
|
}
|
|
}
|
|
|
|
TEST(ZipIteratorTest, ZipFirstBasic) {
|
|
using namespace std;
|
|
const SmallVector<unsigned, 6> pi{3, 1, 4, 1, 5, 9};
|
|
unsigned iters = 0;
|
|
|
|
for (auto tup : zip_first(SmallVector<bool, 0>{1, 1, 0, 1}, pi)) {
|
|
EXPECT_EQ(get<0>(tup), get<1>(tup) & 0x01);
|
|
iters += 1;
|
|
}
|
|
|
|
EXPECT_EQ(iters, 4u);
|
|
}
|
|
|
|
TEST(ZipIteratorTest, ZipLongestBasic) {
|
|
using namespace std;
|
|
const vector<unsigned> pi{3, 1, 4, 1, 5, 9};
|
|
const vector<StringRef> e{"2", "7", "1", "8"};
|
|
|
|
{
|
|
// Check left range longer than right.
|
|
const vector<tuple<Optional<unsigned>, Optional<StringRef>>> expected{
|
|
make_tuple(3, StringRef("2")), make_tuple(1, StringRef("7")),
|
|
make_tuple(4, StringRef("1")), make_tuple(1, StringRef("8")),
|
|
make_tuple(5, None), make_tuple(9, None)};
|
|
size_t iters = 0;
|
|
for (auto tup : zip_longest(pi, e)) {
|
|
EXPECT_EQ(tup, expected[iters]);
|
|
iters += 1;
|
|
}
|
|
EXPECT_EQ(iters, expected.size());
|
|
}
|
|
|
|
{
|
|
// Check right range longer than left.
|
|
const vector<tuple<Optional<StringRef>, Optional<unsigned>>> expected{
|
|
make_tuple(StringRef("2"), 3), make_tuple(StringRef("7"), 1),
|
|
make_tuple(StringRef("1"), 4), make_tuple(StringRef("8"), 1),
|
|
make_tuple(None, 5), make_tuple(None, 9)};
|
|
size_t iters = 0;
|
|
for (auto tup : zip_longest(e, pi)) {
|
|
EXPECT_EQ(tup, expected[iters]);
|
|
iters += 1;
|
|
}
|
|
EXPECT_EQ(iters, expected.size());
|
|
}
|
|
}
|
|
|
|
TEST(ZipIteratorTest, Mutability) {
|
|
using namespace std;
|
|
const SmallVector<unsigned, 4> pi{3, 1, 4, 1, 5, 9};
|
|
char message[] = "hello zip\0";
|
|
|
|
for (auto tup : zip(pi, message, message)) {
|
|
EXPECT_EQ(get<1>(tup), get<2>(tup));
|
|
get<2>(tup) = get<0>(tup) & 0x01 ? 'y' : 'n';
|
|
}
|
|
|
|
// note the rvalue
|
|
for (auto tup : zip(message, "yynyyyzip\0")) {
|
|
EXPECT_EQ(get<0>(tup), get<1>(tup));
|
|
}
|
|
}
|
|
|
|
TEST(ZipIteratorTest, ZipFirstMutability) {
|
|
using namespace std;
|
|
vector<unsigned> pi{3, 1, 4, 1, 5, 9};
|
|
unsigned iters = 0;
|
|
|
|
for (auto tup : zip_first(SmallVector<bool, 0>{1, 1, 0, 1}, pi)) {
|
|
get<1>(tup) = get<0>(tup);
|
|
iters += 1;
|
|
}
|
|
|
|
EXPECT_EQ(iters, 4u);
|
|
|
|
for (auto tup : zip_first(SmallVector<bool, 0>{1, 1, 0, 1}, pi)) {
|
|
EXPECT_EQ(get<0>(tup), get<1>(tup));
|
|
}
|
|
}
|
|
|
|
TEST(ZipIteratorTest, Filter) {
|
|
using namespace std;
|
|
vector<unsigned> pi{3, 1, 4, 1, 5, 9};
|
|
|
|
unsigned iters = 0;
|
|
// pi is length 6, but the zip RHS is length 7.
|
|
auto zipped = zip_first(pi, vector<bool>{1, 1, 0, 1, 1, 1, 0});
|
|
for (auto tup : make_filter_range(
|
|
zipped, [](decltype(zipped)::value_type t) { return get<1>(t); })) {
|
|
EXPECT_EQ(get<0>(tup) & 0x01, get<1>(tup));
|
|
get<0>(tup) += 1;
|
|
iters += 1;
|
|
}
|
|
|
|
// Should have skipped pi[2].
|
|
EXPECT_EQ(iters, 5u);
|
|
|
|
// Ensure that in-place mutation works.
|
|
EXPECT_TRUE(all_of(pi, [](unsigned n) { return (n & 0x01) == 0; }));
|
|
}
|
|
|
|
TEST(ZipIteratorTest, Reverse) {
|
|
using namespace std;
|
|
vector<unsigned> ascending{0, 1, 2, 3, 4, 5};
|
|
|
|
auto zipped = zip_first(ascending, vector<bool>{0, 1, 0, 1, 0, 1});
|
|
unsigned last = 6;
|
|
for (auto tup : reverse(zipped)) {
|
|
// Check that this is in reverse.
|
|
EXPECT_LT(get<0>(tup), last);
|
|
last = get<0>(tup);
|
|
EXPECT_EQ(get<0>(tup) & 0x01, get<1>(tup));
|
|
}
|
|
|
|
auto odds = [](decltype(zipped)::value_type tup) { return get<1>(tup); };
|
|
last = 6;
|
|
for (auto tup : make_filter_range(reverse(zipped), odds)) {
|
|
EXPECT_LT(get<0>(tup), last);
|
|
last = get<0>(tup);
|
|
EXPECT_TRUE(get<0>(tup) & 0x01);
|
|
get<0>(tup) += 1;
|
|
}
|
|
|
|
// Ensure that in-place mutation works.
|
|
EXPECT_TRUE(all_of(ascending, [](unsigned n) { return (n & 0x01) == 0; }));
|
|
}
|
|
|
|
TEST(RangeTest, Distance) {
|
|
std::vector<int> v1;
|
|
std::vector<int> v2{1, 2, 3};
|
|
|
|
EXPECT_EQ(std::distance(v1.begin(), v1.end()), size(v1));
|
|
EXPECT_EQ(std::distance(v2.begin(), v2.end()), size(v2));
|
|
}
|
|
|
|
TEST(IteratorRangeTest, DropBegin) {
|
|
SmallVector<int, 5> vec{0, 1, 2, 3, 4};
|
|
|
|
for (int n = 0; n < 5; ++n) {
|
|
int i = n;
|
|
for (auto &v : drop_begin(vec, n)) {
|
|
EXPECT_EQ(v, i);
|
|
i += 1;
|
|
}
|
|
EXPECT_EQ(i, 5);
|
|
}
|
|
}
|
|
|
|
} // anonymous namespace
|