mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-11 13:46:13 +00:00
639ec3da92
This reverts commit r243567, which ultimately reapplies r243563.
The fix here was to use std::enable_if for overload resolution. Thanks to David
Blaikie for lots of help on this, and for the extra tests!
Original commit message follows:
For cases where we needed a foreach loop in reverse over a container,
we had to do something like
for (const GlobalValue *GV : make_range(TypeInfos.rbegin(),
TypeInfos.rend())) {
This provides a convenience method which shortens this to
for (const GlobalValue *GV : reverse(TypeInfos)) {
There are 2 versions of this, with a preference to the rbegin() version.
The first uses rbegin() and rend() to construct an iterator_range.
The second constructs an iterator_range from the begin() and end() methods
wrapped in std::reverse_iterator's.
Reviewed by David Blaikie.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243581 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
//===- RangeAdapterTest.cpp - Unit tests for range adapters --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/iterator_range.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
#include <iterator>
|
|
#include <list>
|
|
#include <vector>
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
// A wrapper around vector which exposes rbegin(), rend().
|
|
class ReverseOnlyVector {
|
|
std::vector<int> Vec;
|
|
|
|
public:
|
|
ReverseOnlyVector(std::initializer_list<int> list) : Vec(list) {}
|
|
|
|
typedef std::vector<int>::reverse_iterator reverse_iterator;
|
|
reverse_iterator rbegin() { return Vec.rbegin(); }
|
|
reverse_iterator rend() { return Vec.rend(); }
|
|
};
|
|
|
|
// A wrapper around vector which exposes begin(), end(), rbegin() and rend().
|
|
// begin() and end() don't have implementations as this ensures that we will
|
|
// get a linker error if reverse() chooses begin()/end() over rbegin(), rend().
|
|
class BidirectionalVector {
|
|
std::vector<int> Vec;
|
|
|
|
public:
|
|
BidirectionalVector(std::initializer_list<int> list) : Vec(list) {}
|
|
|
|
typedef std::vector<int>::iterator iterator;
|
|
iterator begin();
|
|
iterator end();
|
|
|
|
typedef std::vector<int>::reverse_iterator reverse_iterator;
|
|
reverse_iterator rbegin() { return Vec.rbegin(); }
|
|
reverse_iterator rend() { return Vec.rend(); }
|
|
};
|
|
|
|
template <typename R> void TestRev(const R &r) {
|
|
int counter = 3;
|
|
for (int i : r)
|
|
EXPECT_EQ(i, counter--);
|
|
}
|
|
|
|
// Test fixture
|
|
template <typename T> class RangeAdapterLValueTest : public ::testing::Test {};
|
|
|
|
typedef ::testing::Types<std::vector<int>, std::list<int>, int[4]>
|
|
RangeAdapterLValueTestTypes;
|
|
TYPED_TEST_CASE(RangeAdapterLValueTest, RangeAdapterLValueTestTypes);
|
|
|
|
TYPED_TEST(RangeAdapterLValueTest, TrivialOperation) {
|
|
TypeParam v = {0, 1, 2, 3};
|
|
TestRev(reverse(v));
|
|
|
|
const TypeParam c = {0, 1, 2, 3};
|
|
TestRev(reverse(c));
|
|
}
|
|
|
|
template <typename T> struct RangeAdapterRValueTest : testing::Test {};
|
|
|
|
typedef ::testing::Types<std::vector<int>, std::list<int>, ReverseOnlyVector,
|
|
BidirectionalVector> RangeAdapterRValueTestTypes;
|
|
TYPED_TEST_CASE(RangeAdapterRValueTest, RangeAdapterRValueTestTypes);
|
|
|
|
TYPED_TEST(RangeAdapterRValueTest, TrivialOperation) {
|
|
TestRev(reverse(TypeParam({0, 1, 2, 3})));
|
|
}
|
|
|
|
} // anonymous namespace
|