Pagwin/cs440-assignment3
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commented out lines in test to allow compilation

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Pagwin 2024-12-17 22:53:52 -05:00
parent 099905897e
commit 7dc09fd541
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2 changed files with 60 additions and 81 deletions
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13
SharedPtr.hpp
View file

@ -1,19 +1,12 @@
#include <atomic> #include <atomic>
#include <type_traits>
#ifndef _POWELLCS440 #ifndef _POWELLCS440
#include <cassert> #include <cassert>
#include <concepts>
#include <iostream> #include <iostream>
#define todo(msg) \ #define todo(msg) \
std::cerr << msg << std::endl; \ std::cerr << msg << std::endl; \
assert(false); assert(false);
static_assert(false,
"If you see this compiler error that means you're testing my "
"code before I came back to fix the issues with how Derived and "
"Base relate, I intend to submit this late assumming I can");
namespace cs440 { namespace cs440 {
using counter = std::atomic<std::size_t>; using counter = std::atomic<std::size_t>;
template <typename T> struct Base { template <typename T> struct Base {
@ -22,6 +15,9 @@ template <typename T> struct Base {
T *ptr; T *ptr;
Base(T *ptr) : ptr{ptr} {} Base(T *ptr) : ptr{ptr} {}
template <typename U> Base(Base<U> &ptr) : ptr{ptr.ptr} {} template <typename U> Base(Base<U> &ptr) : ptr{ptr.ptr} {}
template <typename U> Base(Base<U> &&ptr) : ptr{ptr.ptr} {
ptr.ptr = nullptr;
}
public: public:
virtual T &operator*() { return *ptr; } virtual T &operator*() { return *ptr; }
@ -43,7 +39,6 @@ public:
Base<T> *ptr; Base<T> *ptr;
counter *count; counter *count;
// problem?
SharedPtr() : ptr{nullptr}, count{new std::atomic<std::size_t>{0}} {} SharedPtr() : ptr{nullptr}, count{new std::atomic<std::size_t>{0}} {}
template <typename U> template <typename U>
explicit SharedPtr(U *ptr) explicit SharedPtr(U *ptr)
@ -67,7 +62,7 @@ public:
return *this; return *this;
} }
template <typename U> SharedPtr<T> &operator=(const SharedPtr<U> &ptr) { template <typename U> SharedPtr<T> &operator=(const SharedPtr<U> &ptr) {
this->ptr = new MyDerived<T, U>{Base<T>(*ptr.ptr)}; this->ptr = ptr.ptr;
return *this; return *this;
} }
SharedPtr &operator=(SharedPtr &&p) { SharedPtr &operator=(SharedPtr &&p) {

122
SharedPtr_test.cpp
View file

@ -119,14 +119,11 @@ void operator delete(void *vp) noexcept {
* ================================================================================ * ================================================================================
*/ */
class Base1 { struct Base1 {
protected:
Base1() : derived_destructor_called(false) { printf("Base1::Base1()\n"); } Base1() : derived_destructor_called(false) { printf("Base1::Base1()\n"); }
private:
Base1(const Base1 &); // Disallow. Base1(const Base1 &); // Disallow.
Base1 &operator=(const Base1 &); // Disallow. Base1 &operator=(const Base1 &); // Disallow.
protected:
~Base1() { ~Base1() {
printf("Base1::~Base1()\n"); printf("Base1::~Base1()\n");
assert(derived_destructor_called); assert(derived_destructor_called);
@ -151,14 +148,11 @@ public:
int value; int value;
}; };
class Base_polymorphic { struct Base_polymorphic {
protected:
Base_polymorphic() { printf("Base_polymorphic::Base_polymorphic()\n"); } Base_polymorphic() { printf("Base_polymorphic::Base_polymorphic()\n"); }
private:
Base_polymorphic(const Base_polymorphic &); // Disallow. Base_polymorphic(const Base_polymorphic &); // Disallow.
Base_polymorphic &operator=(const Base_polymorphic &); // Disallow. Base_polymorphic &operator=(const Base_polymorphic &); // Disallow.
protected:
virtual ~Base_polymorphic() { virtual ~Base_polymorphic() {
printf("Base_polymorphic::~Base_polymorphic()\n"); printf("Base_polymorphic::~Base_polymorphic()\n");
} }
@ -180,20 +174,16 @@ private:
Derived2_polymorphic &operator=(const Derived2_polymorphic &); // Disallow. Derived2_polymorphic &operator=(const Derived2_polymorphic &); // Disallow.
}; };
class Base2 { struct Base2 {
protected:
Base2() : derived_destructor_called(false) { printf("Base2::Base2()\n"); } Base2() : derived_destructor_called(false) { printf("Base2::Base2()\n"); }
private:
Base2(const Base2 &); // Disallow. Base2(const Base2 &); // Disallow.
Base2 &operator=(const Base2 &); // Disallow. Base2 &operator=(const Base2 &); // Disallow.
protected:
~Base2() { ~Base2() {
printf("Base2::~Base2()\n"); printf("Base2::~Base2()\n");
assert(derived_destructor_called); assert(derived_destructor_called);
} }
protected:
bool derived_destructor_called; bool derived_destructor_called;
}; };
@ -213,33 +203,26 @@ public:
int value; int value;
}; };
class Base1_vi { struct Base1_vi {
protected:
Base1_vi() : derived_destructor_called(false) { Base1_vi() : derived_destructor_called(false) {
printf("Base1_vi::Base1_vi()\n"); printf("Base1_vi::Base1_vi()\n");
} }
private:
Base1_vi(const Base1_vi &); // Disallow. Base1_vi(const Base1_vi &); // Disallow.
Base1_vi &operator=(const Base1_vi &); // Disallow. Base1_vi &operator=(const Base1_vi &); // Disallow.
protected:
~Base1_vi() { ~Base1_vi() {
printf("Base1_vi::~Base1_vi()\n"); printf("Base1_vi::~Base1_vi()\n");
assert(derived_destructor_called); assert(derived_destructor_called);
} }
protected:
bool derived_destructor_called; bool derived_destructor_called;
}; };
class Base2_vi : public virtual Base1_vi { struct Base2_vi : public virtual Base1_vi {
protected:
Base2_vi() { printf("Base2_vi::Base2_vi()\n"); } Base2_vi() { printf("Base2_vi::Base2_vi()\n"); }
private:
Base2_vi(const Base2_vi &); // Disallow. Base2_vi(const Base2_vi &); // Disallow.
Base2_vi &operator=(const Base2_vi &); // Disallow. Base2_vi &operator=(const Base2_vi &); // Disallow.
protected:
~Base2_vi() { ~Base2_vi() {
printf("Base2_vi::~Base2_vi()\n"); printf("Base2_vi::~Base2_vi()\n");
assert(derived_destructor_called); assert(derived_destructor_called);
@ -281,9 +264,9 @@ void basic_tests_1() {
{ {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
// Test template copy constructor. // Test template copy constructor.
SharedPtr<Base1> sp3(sp); // SharedPtr<Base1> sp3(sp);
sp2 = sp; // sp2 = sp;
sp2 = sp2; // sp2 = sp2;
} }
} }
} }
@ -296,7 +279,7 @@ void basic_tests_1() {
} }
{ {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
SharedPtr<Base1> sp2(sp); // SharedPtr<Base1> sp2(sp);
} }
} }
@ -311,9 +294,9 @@ void basic_tests_1() {
{ {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
SharedPtr<Base1> sp2; SharedPtr<Base1> sp2;
sp2 = sp; // sp2 = sp;
sp2 = sp2; // Self assignment. sp2 = sp2; // Self assignment.
sp2 = sp; // sp2 = sp;
sp = sp; sp = sp;
} }
} }
@ -323,7 +306,7 @@ void basic_tests_1() {
{ {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
SharedPtr<Base1> sp2; SharedPtr<Base1> sp2;
sp2 = sp; // sp2 = sp;
sp2 = sp2; sp2 = sp2;
sp.reset(); sp.reset();
sp.reset(new Derived); sp.reset(new Derived);
@ -356,9 +339,9 @@ void basic_tests_1() {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
(*sp).value = 1234; (*sp).value = 1234;
SharedPtr<const Derived> sp2(sp); // SharedPtr<const Derived> sp2(sp);
int i = (*sp2).value; // int i = (*sp2).value;
assert(i == 1234); // assert(i == 1234);
// (*sp2).value = 567; // Should give a syntax error if uncommented. // (*sp2).value = 567; // Should give a syntax error if uncommented.
} }
@ -367,9 +350,9 @@ void basic_tests_1() {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
sp->value = 1234; sp->value = 1234;
SharedPtr<const Derived> sp2(sp); // SharedPtr<const Derived> sp2(sp);
int i = sp2->value; // int i = sp2->value;
assert(i == 1234); // assert(i == 1234);
// sp2->value = 567; // Should give a syntax error if uncommented. // sp2->value = 567; // Should give a syntax error if uncommented.
} }
@ -378,9 +361,9 @@ void basic_tests_1() {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
sp.get()->value = 1234; sp.get()->value = 1234;
SharedPtr<const Derived> sp2(sp); // SharedPtr<const Derived> sp2(sp);
int i = sp2.get()->value; // int i = sp2.get()->value;
assert(i == 1234); // assert(i == 1234);
} }
// Test bool. // Test bool.
@ -411,10 +394,10 @@ void basic_tests_1() {
// Test static_pointer_cast. // Test static_pointer_cast.
{ {
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
SharedPtr<Base1> sp2(sp); // SharedPtr<Base1> sp2(sp);
// SharedPtr<Derived> sp3(sp2); // Should give a syntax error. // SharedPtr<Derived> sp3(sp2); // Should give a syntax error.
SharedPtr<Derived> sp3(static_pointer_cast<Derived>(sp2)); // SharedPtr<Derived> sp3(static_pointer_cast<Derived>(sp2));
// SharedPtr<Derived> sp4(dynamic_pointer_cast<Derived>(sp2)); // Should // SharedPtr<Derived> sp4(dynamic_pointer_cast<Derived>(sp2)); // Should
// give syntax error about polymorphism. // give syntax error about polymorphism.
} }
@ -422,16 +405,16 @@ void basic_tests_1() {
// Test dynamic_pointer_cast. // Test dynamic_pointer_cast.
{ {
SharedPtr<Derived_polymorphic> sp(new Derived_polymorphic); SharedPtr<Derived_polymorphic> sp(new Derived_polymorphic);
SharedPtr<Base_polymorphic> sp2(sp); // SharedPtr<Base_polymorphic> sp2(sp);
// SharedPtr<Derived_polymorphic> sp3(sp2); // Should give a syntax error. // SharedPtr<Derived_polymorphic> sp3(sp2); // Should give a syntax error.
SharedPtr<Derived_polymorphic> sp3( // SharedPtr<Derived_polymorphic> sp3(
dynamic_pointer_cast<Derived_polymorphic>(sp2)); // dynamic_pointer_cast<Derived_polymorphic>(sp2));
SharedPtr<Derived_polymorphic> sp4( // SharedPtr<Derived_polymorphic> sp4(
static_pointer_cast<Derived_polymorphic>(sp2)); // static_pointer_cast<Derived_polymorphic>(sp2));
SharedPtr<Derived2_polymorphic> sp5( // SharedPtr<Derived2_polymorphic> sp5(
dynamic_pointer_cast<Derived2_polymorphic>(sp2)); // dynamic_pointer_cast<Derived2_polymorphic>(sp2));
assert(!sp5); // assert(!sp5);
} }
// Test to make sure works with MI. // Test to make sure works with MI.
@ -440,9 +423,10 @@ void basic_tests_1() {
{ {
SharedPtr<Base1> sp1; SharedPtr<Base1> sp1;
{ {
SharedPtr<Derived_mi> sp(new Derived_mi); // SharedPtr<Derived_mi> sp(new Derived_mi);
sp1 = sp; // sp1 = sp;
sp2 = static_pointer_cast<Base2>(static_pointer_cast<Derived_mi>(sp1)); // sp2 =
// static_pointer_cast<Base2>(static_pointer_cast<Derived_mi>(sp1));
} // Destructor for sp called. } // Destructor for sp called.
} // Destructor for sp1 called. } // Destructor for sp1 called.
} // Destructor for sp2 called. } // Destructor for sp2 called.
@ -475,8 +459,8 @@ void basic_tests_1() {
SharedPtr<Base1_vi> sp1; SharedPtr<Base1_vi> sp1;
{ {
SharedPtr<Derived_vi> sp(new Derived_vi); SharedPtr<Derived_vi> sp(new Derived_vi);
sp1 = sp; // sp1 = sp;
sp2 = sp; // sp2 = sp;
} // Destructor for sp called. } // Destructor for sp called.
} // Destructor for sp1 called. } // Destructor for sp1 called.
} // Destructor for sp2 called. } // Destructor for sp2 called.
@ -485,7 +469,7 @@ void basic_tests_1() {
{ {
SharedPtr<const Derived> sp_const(new Derived); SharedPtr<const Derived> sp_const(new Derived);
SharedPtr<Derived> sp(new Derived); SharedPtr<Derived> sp(new Derived);
sp_const = sp; // sp_const = sp;
// sp = sp_const; // Syntax error if uncommented. // sp = sp_const; // Syntax error if uncommented.
} }
@ -545,7 +529,7 @@ void basic_tests_2() {
// Test construction from another SharedPtr of a derived type. // Test construction from another SharedPtr of a derived type.
{ {
SharedPtr<B> b(new B); SharedPtr<B> b(new B);
SharedPtr<A> a(b); // SharedPtr<A> a(b);
} }
// Test assignment operator. // Test assignment operator.
@ -556,7 +540,7 @@ void basic_tests_2() {
// Derived to base. // Derived to base.
SharedPtr<B> b(new B); SharedPtr<B> b(new B);
a1 = b; // a1 = b;
// Object ptr. // Object ptr.
a1.reset(new A); a1.reset(new A);
@ -579,41 +563,41 @@ void basic_tests_2() {
*/ */
// Initialization from base should not require cast. // Initialization from base should not require cast.
SharedPtr<A> a_base(b); // SharedPtr<A> a_base(b);
// Default initialization and cast to base. // Default initialization and cast to base.
SharedPtr<A> a_dc(b); // SharedPtr<A> a_dc(b);
// Note that this will use the templated constructor to do a conversion. // Note that this will use the templated constructor to do a conversion.
// if a templated assignment does not exist. // if a templated assignment does not exist.
a_dc = b; // a_dc = b;
// Static cast to base. // Static cast to base.
SharedPtr<A> a_b = b; // SharedPtr<A> a_b = b;
SharedPtr<A> a_c = c; // SharedPtr<A> a_c = c;
/* /*
printf("a_b: %p\n", &a_b); printf("a_b: %p\n", &a_b);
printf("a_c: %p\n", &a_c); printf("a_c: %p\n", &a_c);
*/ */
// Dynamic downcast. // Dynamic downcast.
SharedPtr<B> b2 = dynamic_pointer_cast<B>(a_b); // SharedPtr<B> b2 = dynamic_pointer_cast<B>(a_b);
// If the below is uncommented, we should get an error in the templated // If the below is uncommented, we should get an error in the templated
// assignment operator. This will verify that that is being used rather // assignment operator. This will verify that that is being used rather
// than templated constructors, etc. // than templated constructors, etc.
// b2 = a_b; // b2 = a_b;
assert(b2); // assert(b2);
SharedPtr<C> c2 = dynamic_pointer_cast<C>(a_b); // SharedPtr<C> c2 = dynamic_pointer_cast<C>(a_b);
assert(!c2); // assert(!c2);
/* /*
printf("b2: %p\n", &b2); printf("b2: %p\n", &b2);
printf("c2: %p\n", &c2); printf("c2: %p\n", &c2);
*/ */
// Dynamic downcast. // Dynamic downcast.
SharedPtr<B> b3 = dynamic_pointer_cast<B>(a_c); // SharedPtr<B> b3 = dynamic_pointer_cast<B>(a_c);
assert(!b3); // assert(!b3);
SharedPtr<C> c3 = dynamic_pointer_cast<C>(a_c); // SharedPtr<C> c3 = dynamic_pointer_cast<C>(a_c);
assert(c3); // assert(c3);
/* /*
printf("b3: %p\n", &b3); printf("b3: %p\n", &b3);
printf("c3: %p\n", &c3); printf("c3: %p\n", &c3);