/*
- * Copyright 2017 Facebook, Inc.
+ * Copyright 2014-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <glog/logging.h>
#include <iosfwd>
+#include <memory>
#include <random>
#include <set>
#include <vector>
| as<vector<int>>();
EXPECT_EQ(expected, actual);
}
- */
+ */
+}
+
+TEST(Gen, Visit) {
+ auto increment = [](int& i) { ++i; };
+ auto clone = map([](int i) { return i; });
+ { // apply()
+ auto expected = 10;
+ auto actual = seq(0) | clone | visit(increment) | take(4) | sum;
+ EXPECT_EQ(expected, actual);
+ }
+ { // foreach()
+ auto expected = 10;
+ auto actual = seq(0, 3) | clone | visit(increment) | sum;
+ EXPECT_EQ(expected, actual);
+ }
+ { // tee-like
+ std::vector<int> x2, x4;
+ std::vector<int> expected2{0, 1, 4, 9};
+ std::vector<int> expected4{0, 1, 16, 81};
+
+ auto tee = [](std::vector<int>& container) {
+ return visit([&](int value) { container.push_back(value); });
+ };
+ EXPECT_EQ(
+ 98, seq(0, 3) | map(square) | tee(x2) | map(square) | tee(x4) | sum);
+ EXPECT_EQ(expected2, x2);
+ EXPECT_EQ(expected4, x4);
+ }
}
TEST(Gen, Composed) {
TEST(Gen, DistinctMove) { // 0 1 4 9 6 5 6 9 4 1 0
auto expected = vector<int>{0, 1, 2, 3, 4, 5};
- auto actual =
- seq(0, 100)
- | mapped([](int i) { return std::unique_ptr<int>(new int(i)); })
+ auto actual = seq(0, 100) |
+ mapped([](int i) { return std::make_unique<int>(i); })
// see comment below about selector parameters for Distinct
- | distinctBy([](const std::unique_ptr<int>& pi) { return *pi * *pi % 10; })
- | mapped([](std::unique_ptr<int> pi) { return *pi; })
- | as<vector>();
+ | distinctBy([](const std::unique_ptr<int>& pi) {
+ return *pi * *pi % 10;
+ }) |
+ mapped([](std::unique_ptr<int> pi) { return *pi; }) | as<vector>();
// NOTE(tjackson): the following line intentionally doesn't work:
// | distinctBy([](std::unique_ptr<int> pi) { return *pi * *pi % 10; })
// reference of a std::vector when it is used as the 'other' for an rvalue
// constructor. Use fbvector because we're sure its size will be zero in
// this case.
- fbvector<int> v({1,2,3,4});
+ fbvector<int> v({1, 2, 3, 4});
auto q1 = from(v);
EXPECT_EQ(v.size(), 4); // ensure that the lvalue version was called!
auto expected = 1 * 2 * 3 * 4;
}
{
auto expected = 7;
- auto q = from([] {return vector<int>({3,7,5}); }());
+ auto q = from([] { return vector<int>({3, 7, 5}); }());
EXPECT_EQ(expected, q | max);
}
{
- for (auto size: {5, 1024, 16384, 1<<20}) {
+ for (auto size : {5, 1024, 16384, 1 << 20}) {
auto q1 = from(vector<int>(size, 2));
auto q2 = from(vector<int>(size, 3));
// If the rvalue specialization is broken/gone, then the compiler will
| map([](int n) {
return GENERATOR(int) {
int i;
- for (i = 1; i < n; ++i)
+ for (i = 1; i < n; ++i) {
yield(i);
- for (; i >= 1; --i)
+ }
+ for (; i >= 1; --i) {
yield(i);
+ }
};
})
| concat;
}
TEST(Gen, NoNeedlessCopies) {
- auto gen = seq(1, 5)
- | map([](int x) { return unique_ptr<int>(new int(x)); })
- | map([](unique_ptr<int> p) { return p; })
- | map([](unique_ptr<int>&& p) { return std::move(p); })
- | map([](const unique_ptr<int>& p) { return *p; });
+ auto gen = seq(1, 5) | map([](int x) { return std::make_unique<int>(x); }) |
+ map([](unique_ptr<int> p) { return p; }) |
+ map([](unique_ptr<int>&& p) { return std::move(p); }) |
+ map([](const unique_ptr<int>& p) { return *p; });
EXPECT_EQ(15, gen | sum);
EXPECT_EQ(6, gen | take(3) | sum);
}
void PrintTo(const DereferenceWrapper& a, std::ostream* o) {
*o << "Wrapper{\"" << cEscape<string>(a.data) << "\"}";
}
-}
+} // namespace
TEST(Gen, DereferenceWithLValueRef) {
auto original = vector<DereferenceWrapper>{{"foo"}, {"bar"}};
TEST(Gen, BatchMove) {
auto expected = vector<vector<int>>{ {0, 1}, {2, 3}, {4} };
- auto actual =
- seq(0, 4)
- | mapped([](int i) { return std::unique_ptr<int>(new int(i)); })
- | batch(2)
- | mapped([](std::vector<std::unique_ptr<int>>& pVector) {
- std::vector<int> iVector;
- for (const auto& p : pVector) {
- iVector.push_back(*p);
- };
- return iVector;
- })
- | as<vector>();
+ auto actual = seq(0, 4) |
+ mapped([](int i) { return std::make_unique<int>(i); }) | batch(2) |
+ mapped([](std::vector<std::unique_ptr<int>>& pVector) {
+ std::vector<int> iVector;
+ for (const auto& p : pVector) {
+ iVector.push_back(*p);
+ };
+ return iVector;
+ }) |
+ as<vector>();
EXPECT_EQ(expected, actual);
}
+TEST(Gen, Window) {
+ auto expected = seq(0, 10) | as<std::vector>();
+ for (size_t windowSize = 1; windowSize <= 20; ++windowSize) {
+ // no early stop
+ auto actual = seq(0, 10) |
+ mapped([](int i) { return std::make_unique<int>(i); }) | window(4) |
+ dereference | as<std::vector>();
+ EXPECT_EQ(expected, actual) << windowSize;
+ }
+ for (size_t windowSize = 1; windowSize <= 20; ++windowSize) {
+ // pre-window take
+ auto actual = seq(0) |
+ mapped([](int i) { return std::make_unique<int>(i); }) | take(11) |
+ window(4) | dereference | as<std::vector>();
+ EXPECT_EQ(expected, actual) << windowSize;
+ }
+ for (size_t windowSize = 1; windowSize <= 20; ++windowSize) {
+ // post-window take
+ auto actual = seq(0) |
+ mapped([](int i) { return std::make_unique<int>(i); }) | window(4) |
+ take(11) | dereference | as<std::vector>();
+ EXPECT_EQ(expected, actual) << windowSize;
+ }
+}
+
TEST(Gen, Just) {
{
int x = 3;
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