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Finished 3rd day exercise #5

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732d938
Finished 3rd day exercise
Nov 14, 2018
f2ae657
Removed invalid noexcept specifiers
Nov 15, 2018
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56 changes: 56 additions & 0 deletions exercise/01/animal.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,56 @@
#include "animal.h"
#include <numeric>

animal::~animal() = default;

std::size_t insect::legs() const noexcept
{
return 6u;
}

std::wstring cockroach::species() const
{
return L"cockroach";
}

std::size_t bird::legs() const noexcept
{
return 2u;
}

std::wstring sparrow::species() const
{
return L"sparrow";
}

std::size_t spider::legs() const noexcept
{
return 8u;
}

std::wstring tarantula::species() const
{
return L"tarantula";
}

std::unique_ptr<animal> animal_factory(const std::size_t animal_id)
{
switch(animal_id)
{
case 1u:
return std::make_unique<cockroach>();
case 2u:
return std::make_unique<sparrow>();
case 3u:
return std::make_unique<tarantula>();
default:
throw std::invalid_argument("invalid animal id");
}
}

leg_counter::leg_counter() : num_legs(0) {}

std::size_t leg_counter::legs() const noexcept
{
return num_legs;
}
66 changes: 66 additions & 0 deletions exercise/01/animal.h
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@@ -0,0 +1,66 @@
#pragma once
#include <string>
#include <memory>

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

struct insect : animal
{
std::size_t legs() const noexcept override;
};

struct cockroach final : insect
{
std::wstring species() const override;
};

struct bird : animal
{
std::size_t legs() const noexcept override;
};

struct sparrow final : bird
{
std::wstring species() const override;
};

struct spider : animal
{
std::size_t legs() const noexcept override;
};

struct tarantula final : spider
{
std::wstring species() const override;
};


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

struct leg_counter final
{
leg_counter();
template<typename AnimalPtrT>
std::wstring add_animal(AnimalPtrT animal);
std::size_t legs() const noexcept;

private:
std::size_t num_legs;
};

template <typename AnimalPtrT>
std::wstring leg_counter::add_animal(AnimalPtrT animal)
{
if (animal)
{
num_legs += animal->legs();
return animal->species();
}
throw std::invalid_argument("invalid pointer type");
}

188 changes: 94 additions & 94 deletions exercise/01/animals.vcxproj
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Original file line number Diff line number Diff line change
@@ -1,95 +1,95 @@
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46 changes: 23 additions & 23 deletions exercise/01/animals.vcxproj.filters
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@@ -1,24 +1,24 @@
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