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Original file line number | Diff line number | Diff line change |
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#include <stdexcept> | ||
#include <memory> | ||
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namespace sparrow { | ||
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template <class T> | ||
class value_ptr { | ||
public: | ||
value_ptr() = default; | ||
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explicit value_ptr(T value) | ||
: value_(std::make_unique<T>(std::move(value))) {} | ||
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value_ptr(const value_ptr& other) | ||
: value_(other.value_ ? std::make_unique<T>(*other.value_) : std::unique_ptr<T>()){} | ||
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value_ptr(value_ptr&& other) noexcept | ||
: value_(std::move(other.value_)) { | ||
other.reset(); | ||
} | ||
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value_ptr& operator=(const value_ptr& other) { | ||
if (other.has_value()) { | ||
value_ = std::make_unique<T>(*other.value_); | ||
}else { | ||
value_.reset(); | ||
} | ||
return *this; | ||
} | ||
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value_ptr& operator=(value_ptr&& other) noexcept { | ||
if (this != &other) { | ||
value_ = std::move(other.value_); | ||
other.reset(); | ||
} | ||
return *this; | ||
} | ||
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T& operator*() { | ||
if (!value_) { | ||
throw std::runtime_error("No value stored in value_ptr"); | ||
} | ||
return *value_; | ||
} | ||
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const T& operator*() const { | ||
if (!value_) { | ||
throw std::runtime_error("No value stored in value_ptr"); | ||
} | ||
return *value_; | ||
} | ||
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T* operator->() { | ||
if (!value_) { | ||
throw std::runtime_error("No value stored in value_ptr"); | ||
} | ||
return &*value_; | ||
} | ||
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const T* operator->() const { | ||
if (!value_) { | ||
throw std::runtime_error("No value stored in value_ptr"); | ||
} | ||
return &*value_; | ||
} | ||
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explicit operator bool() const noexcept { | ||
return has_value(); | ||
} | ||
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bool has_value() const noexcept { | ||
return bool(value_); | ||
} | ||
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void reset() noexcept { | ||
value_.reset(); | ||
} | ||
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private: | ||
std::unique_ptr<T> value_; | ||
}; | ||
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} |
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Original file line number | Diff line number | Diff line change |
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#include <functional> | ||
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#include "sparrow/memory.hpp" | ||
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#include "doctest/doctest.h" | ||
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using namespace sparrow; | ||
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TEST_SUITE("value_ptr") | ||
{ | ||
TEST_CASE("constructor") | ||
{ | ||
value_ptr<int> vp; | ||
CHECK(!vp); | ||
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value_ptr vp1(42); | ||
REQUIRE(vp1); | ||
CHECK(*vp1 == 42); | ||
} | ||
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TEST_CASE("copy constructor") | ||
{ | ||
value_ptr vp1(42); | ||
value_ptr vp2(vp1); | ||
REQUIRE(vp1); | ||
REQUIRE(vp2); | ||
CHECK(*vp1 == 42); | ||
CHECK(*vp2 == 42); | ||
} | ||
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TEST_CASE("copy") | ||
{ | ||
value_ptr vp1(42); | ||
value_ptr vp2 = vp1; | ||
REQUIRE(vp1); | ||
REQUIRE(vp2); | ||
CHECK(*vp1 == 42); | ||
CHECK(*vp2 == 42); | ||
} | ||
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TEST_CASE("move constructor") | ||
{ | ||
value_ptr vp1(42); | ||
value_ptr vp2(std::move(vp1)); | ||
CHECK(!vp1); | ||
REQUIRE(vp2); | ||
CHECK(*vp2 == 42); | ||
} | ||
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TEST_CASE("move assignment") | ||
{ | ||
value_ptr vp1(42); | ||
value_ptr<int> vp2; | ||
vp2 = std::move(vp1); | ||
CHECK(!vp1); | ||
REQUIRE(vp2); | ||
CHECK(*vp2 == 42); | ||
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value_ptr<int> vp3; | ||
{ | ||
value_ptr vp4(43); | ||
vp3 = std::move(vp4); | ||
} | ||
REQUIRE(vp3); | ||
CHECK(*vp3 == 43); | ||
} | ||
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TEST_CASE("operator*") | ||
{ | ||
value_ptr vp(42); | ||
CHECK(*vp == 42); | ||
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*vp = 43; | ||
CHECK(*vp == 43); | ||
} | ||
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TEST_CASE("operator->") | ||
{ | ||
value_ptr vp(std::vector<int>{42}); | ||
CHECK(vp.operator->() == &*vp); | ||
CHECK(vp->size() == 1); | ||
} | ||
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TEST_CASE("operator bool") | ||
{ | ||
value_ptr<int> vp; | ||
CHECK(!vp); | ||
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value_ptr vp1(42); | ||
CHECK(vp1); | ||
} | ||
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TEST_CASE("has_value") | ||
{ | ||
value_ptr<int> vp; | ||
CHECK(!vp.has_value()); | ||
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value_ptr vp1(42); | ||
CHECK(vp1.has_value()); | ||
} | ||
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TEST_CASE("reset") | ||
{ | ||
value_ptr vp(42); | ||
REQUIRE(vp); | ||
vp.reset(); | ||
CHECK(!vp); | ||
} | ||
} |