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/// \file
// Range v3 library
//
// Copyright Eric Niebler 2013-2014.
// Copyright Casey Carter 2017.
//
// Use, modification and distribution is subject to the
// Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// Project home: https://github.com/ericniebler/range-v3
//
#include <vector>
#include <range/v3/view/cache1.hpp>
#include <range/v3/view/transform.hpp>
#include <range/v3/view/c_str.hpp>
#include <range/v3/view/move.hpp>
#include "../simple_test.hpp"
#include "../test_utils.hpp"
using namespace ranges;
int main()
{
{
int count = 0;
std::vector<int> v{1,2,3};
auto rng = v | views::transform([&count](int i){ ++count; return i;})
| views::cache1;
using Rng = decltype(rng);
CPP_assert(!range<Rng const>);
CPP_assert(input_range<Rng>);
CPP_assert(!forward_range<Rng>);
CPP_assert(common_range<Rng>);
CPP_assert(view_<Rng>);
CPP_assert(sized_range<Rng>);
CPP_assert(sized_sentinel_for<sentinel_t<Rng>, iterator_t<Rng>>);
CPP_assert(same_as<range_value_t<Rng>, int>);
CPP_assert(same_as<range_reference_t<Rng>, int &&>);
CPP_assert(same_as<range_rvalue_reference_t<Rng>, int &&>);
CHECK(count == 0);
auto it = ranges::begin(rng);
CHECK(count == 0);
auto last = ranges::end(rng);
CHECK(it != last);
CHECK(count == 0);
CHECK(*it == 1);
CHECK(count == 1);
CHECK(*it == 1);
CHECK(count == 1);
++it;
CHECK(it != last);
CHECK(count == 1);
CHECK(*it == 2);
CHECK(count == 2);
CHECK(*it == 2);
CHECK(count == 2);
++it;
CHECK(it != last);
CHECK(count == 2);
CHECK(*it == 3);
CHECK(count == 3);
CHECK(*it == 3);
CHECK(count == 3);
++it;
CHECK(count == 3);
CHECK(it == last);
}
{
int count = 0;
char const * hi = "hi";
auto rng = views::c_str(hi)
| views::transform([&count](char ch){ ++count; return ch;})
| views::cache1;
using Rng = decltype(rng);
CPP_assert(!range<Rng const>);
CPP_assert(input_range<Rng>);
CPP_assert(!forward_range<Rng>);
CPP_assert(!common_range<Rng>);
CPP_assert(view_<Rng>);
CPP_assert(!sized_range<Rng>);
CPP_assert(!sized_sentinel_for<sentinel_t<Rng>, iterator_t<Rng>>);
CPP_assert(same_as<range_value_t<Rng>, char>);
CPP_assert(same_as<range_reference_t<Rng>, char &&>);
CPP_assert(same_as<range_rvalue_reference_t<Rng>, char &&>);
CHECK(count == 0);
auto it = ranges::begin(rng);
CHECK(count == 0);
auto last = ranges::end(rng);
CHECK(it != last);
CHECK(count == 0);
CHECK(*it == 'h');
CHECK(count == 1);
CHECK(*it == 'h');
CHECK(count == 1);
++it;
CHECK(it != last);
CHECK(count == 1);
CHECK(*it == 'i');
CHECK(count == 2);
CHECK(*it == 'i');
CHECK(count == 2);
++it;
CHECK(count == 2);
CHECK(it == last);
}
{
int count = 0;
MoveOnlyString rg[] = {"hello", "world"};
auto rng = rg
| views::move
| views::transform([&count](auto s){ ++count; RANGES_ENSURE(s != ""); return s;})
| views::cache1;
using Rng = decltype(rng);
CPP_assert(!range<Rng const>);
CPP_assert(input_range<Rng>);
CPP_assert(!forward_range<Rng>);
CPP_assert(common_range<Rng>);
CPP_assert(view_<Rng>);
CPP_assert(sized_range<Rng>);
CPP_assert(sized_sentinel_for<sentinel_t<Rng>, iterator_t<Rng>>);
CPP_assert(same_as<range_value_t<Rng>, MoveOnlyString>);
CPP_assert(same_as<range_reference_t<Rng>, MoveOnlyString &&>);
CPP_assert(same_as<range_rvalue_reference_t<Rng>, MoveOnlyString &&>);
CHECK(count == 0);
auto it = ranges::begin(rng);
CHECK(count == 0);
auto last = ranges::end(rng);
CHECK(it != last);
CHECK(count == 0);
CHECK((*it == "hello"));
CHECK(count == 1);
CHECK((*it == "hello"));
CHECK(count == 1);
++it;
CHECK(it != last);
CHECK(count == 1);
CHECK((*it == "world"));
CHECK(count == 2);
CHECK((*it == "world"));
CHECK(count == 2);
++it;
CHECK(count == 2);
CHECK(it == last);
}
return test_result();
}
|
