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Done #11

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c073886
Done
Nov 14, 2018
a6522ba
Gordan Kucinar
Nov 14, 2018
0cca019
Kucinar Gordan
Nov 14, 2018
d1a1f3b
Kucinar Gordan
Nov 15, 2018
c68ecc8
Kucinar Gordan
Nov 15, 2018
cc59eaa
Kucinar Gordan
Nov 15, 2018
c6f7ef6
Kucinar Gordan
Nov 15, 2018
acc6753
Kucinar Gordan
Nov 16, 2018
b255c6e
Kucinar Gordan
Nov 16, 2018
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27 changes: 27 additions & 0 deletions exercise/01/animal.cpp
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#include "animal.h"
#include <numeric>

std::wstring leg_counter::add_animal(std::unique_ptr<animal>&& animal)
{
if (!animal)
return std::wstring();

animals.emplace_back(std::move(animal));
return animals.back()->species();
}

std::size_t leg_counter::legs() const noexcept
{
return std::accumulate(std::cbegin(animals), std::cend(animals), 0u, [](auto accu, auto const & animal) { return accu + animal->legs(); });
}

std::unique_ptr<animal> animal_factory(animal_id animal)
{
switch (animal)
{
case sparrow_id: return std::make_unique<sparrow>();
case tarantula_id: return std::make_unique<tarantula>();
case cockroach_id: return std::make_unique <cockroach>();
default: return nullptr;
}
}
40 changes: 40 additions & 0 deletions exercise/01/animal.h
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#pragma once
#include "animal_lib.h"
#include <string>
#include <memory>
#include <vector>

const animal_family_id bird_id = 1;
const animal_family_id spider_id = 2;
const animal_family_id insect_id = 3;

template<> const std::size_t leg_count<bird_id>::value = 2u;
template<> const std::size_t leg_count<spider_id>::value = 8u;
template<> const std::size_t leg_count<insect_id>::value = 6u;

using bird = legged_animal<bird_id>;
using spider = legged_animal<spider_id>;
using insect = legged_animal<insect_id>;

const animal_id cockroach_id = 1;
const animal_id sparrow_id = 2;
const animal_id tarantula_id = 3;

template<> const std::wstring animal_name<sparrow_id>::value = L"sparrow";
template<> const std::wstring animal_name<cockroach_id>::value = L"cockroach";
template<> const std::wstring animal_name<tarantula_id>::value = L"tarantula";

using sparrow = named_animal<sparrow_id, bird_id>;
using tarantula = named_animal<tarantula_id, spider_id>;
using cockroach = named_animal<cockroach_id, insect_id>;

std::unique_ptr<animal> animal_factory(animal_id animal);

struct leg_counter final
{
std::wstring add_animal(std::unique_ptr<animal>&& animal);
std::size_t legs() const noexcept;

private:
std::vector<std::unique_ptr<animal>> animals;
};
50 changes: 50 additions & 0 deletions exercise/01/animal_lib.h
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#pragma once
#include <utility>
#include <string>

struct animal
{
virtual std::size_t legs() const noexcept = 0;
virtual std::wstring const & species() const noexcept = 0;
virtual ~animal() = default;
};

template<typename T, std::size_t ANIMAL_ID>
static T fail_name()
{
static_assert(false, "specialize value member");
}

using animal_family_id = std::size_t;
template<animal_family_id ANIMAL_FAMILY_ID>
struct leg_count
{
static const std::size_t value;
};
template<animal_family_id ANIMAL_FAMILY_ID> const std::size_t leg_count<ANIMAL_FAMILY_ID>::value = fail_name<std::size_t, ANIMAL_FAMILY_ID>();

template<animal_family_id ANIMAL_FAMILY_ID>
struct legged_animal : animal
{
std::size_t legs() const noexcept override final
{
return leg_count<ANIMAL_FAMILY_ID>::value;
}
};

using animal_id = std::size_t;
template<animal_id ANIMAL_ID>
struct animal_name
{
static const std::wstring value;
};
template<animal_id ANIMAL_ID> const std::wstring animal_name<ANIMAL_ID>::value = fail_name<std::wstring, ANIMAL_ID>();

template<animal_id ANIMAL_ID, animal_family_id ANIMAL_FAMILY_ID>
struct named_animal final : legged_animal<ANIMAL_FAMILY_ID>
{
std::wstring const & species() const noexcept override
{
return animal_name<ANIMAL_ID>::value;
}
};
196 changes: 102 additions & 94 deletions exercise/01/animals.vcxproj
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49 changes: 26 additions & 23 deletions exercise/01/animals.vcxproj.filters
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