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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: gcc-10
// UNSUPPORTED: libcpp-has-no-incomplete-ranges
// std::ranges::data
#include <ranges>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
using RangeDataT = decltype(std::ranges::data);
static int globalBuff[2];
struct Incomplete;
static_assert(!std::is_invocable_v<RangeDataT, Incomplete[]>);
static_assert(!std::is_invocable_v<RangeDataT, Incomplete[2]>);
static_assert(!std::is_invocable_v<RangeDataT, Incomplete[2][2]>);
static_assert(!std::is_invocable_v<RangeDataT, int [1]>);
static_assert(!std::is_invocable_v<RangeDataT, int (&&)[1]>);
static_assert( std::is_invocable_v<RangeDataT, int (&)[1]>);
struct DataMember {
int x;
constexpr const int *data() const { return &x; }
};
static_assert( std::is_invocable_v<RangeDataT, DataMember &>);
static_assert(!std::is_invocable_v<RangeDataT, DataMember &&>);
struct VoidDataMember {
void *data() const;
};
static_assert(!std::is_invocable_v<RangeDataT, VoidDataMember const&>);
struct Empty { };
struct EmptyDataMember {
Empty data() const;
};
static_assert(!std::is_invocable_v<RangeDataT, EmptyDataMember const&>);
struct EmptyPtrDataMember {
Empty x;
constexpr const Empty *data() const { return &x; }
};
struct PtrConvertible {
operator int*() const;
};
struct PtrConvertibleDataMember {
PtrConvertible data() const;
};
static_assert(!std::is_invocable_v<RangeDataT, PtrConvertibleDataMember const&>);
struct NonConstDataMember {
int x;
constexpr int *data() { return &x; }
};
struct EnabledBorrowingDataMember {
constexpr int *data() { return &globalBuff[0]; }
};
template<>
inline constexpr bool std::ranges::enable_borrowed_range<EnabledBorrowingDataMember> = true;
struct DataMemberAndBegin {
int x;
constexpr const int *data() const { return &x; }
constexpr const int *begin() const { return &x; }
};
constexpr bool testDataMember() {
DataMember a;
assert(std::ranges::data(a) == &a.x);
NonConstDataMember b;
assert(std::ranges::data(b) == &b.x);
EnabledBorrowingDataMember c;
assert(std::ranges::data(std::move(c)) == &globalBuff[0]);
DataMemberAndBegin d;
assert(std::ranges::data(d) == &d.x);
return true;
}
using ContiguousIter = contiguous_iterator<const int*>;
struct BeginMemberContiguousIterator {
int buff[8];
constexpr ContiguousIter begin() const { return ContiguousIter(buff); }
};
static_assert( std::is_invocable_v<RangeDataT, BeginMemberContiguousIterator &>);
static_assert(!std::is_invocable_v<RangeDataT, BeginMemberContiguousIterator &&>);
struct BeginMemberRandomAccess {
int buff[8];
random_access_iterator<const int*> begin() const;
};
static_assert(!std::is_invocable_v<RangeDataT, BeginMemberRandomAccess>);
static_assert(!std::is_invocable_v<RangeDataT, BeginMemberRandomAccess const>);
static_assert(!std::is_invocable_v<RangeDataT, BeginMemberRandomAccess const&>);
struct BeginFriendContiguousIterator {
int buff[8];
friend constexpr ContiguousIter begin(const BeginFriendContiguousIterator &iter) {
return ContiguousIter(iter.buff);
}
};
struct BeginFriendRandomAccess {
friend random_access_iterator<const int*> begin(const BeginFriendRandomAccess iter);
};
static_assert(!std::is_invocable_v<RangeDataT, BeginFriendRandomAccess>);
static_assert(!std::is_invocable_v<RangeDataT, BeginFriendRandomAccess const>);
static_assert(!std::is_invocable_v<RangeDataT, BeginFriendRandomAccess const&>);
struct BeginMemberRvalue {
int buff[8];
ContiguousIter begin() &&;
};
static_assert(!std::is_invocable_v<RangeDataT, BeginMemberRvalue&&>);
static_assert(!std::is_invocable_v<RangeDataT, BeginMemberRvalue const&>);
struct BeginMemberBorrowingEnabled {
constexpr contiguous_iterator<int*> begin() { return contiguous_iterator<int*>{&globalBuff[1]}; }
};
template<>
inline constexpr bool std::ranges::enable_borrowed_range<BeginMemberBorrowingEnabled> = true;
constexpr bool testViaRangesBegin() {
int arr[2];
assert(std::ranges::data(arr) == arr + 0);
BeginMemberContiguousIterator a;
assert(std::ranges::data(a) == a.buff);
const BeginFriendContiguousIterator b {};
assert(std::ranges::data(b) == b.buff);
BeginMemberBorrowingEnabled c;
assert(std::ranges::data(std::move(c)) == &globalBuff[1]);
return true;
}
int main(int, char**) {
testDataMember();
static_assert(testDataMember());
testViaRangesBegin();
static_assert(testViaRangesBegin());
return 0;
}
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