Polymorphic implementation for == with CRTP
0
Trying to implement equality for all types that share same base.
Came to the following solution, with CRTP -- would appreciate comments.
AbstractBase
class AbstractBase {
virtual bool base_equals(const AbstractBase& other) const = 0;
virtual std::ostream& print(std::ostream& out = std::cout) const = 0;
public:
bool operator==(const AbstractBase& other)const {
if(typeid(*this)==typeid(other)) {
return this->base_equals(other);
}
return false;
}
friend std::ostream& operator<<(std::ostream& out, const AbstractBase& ab) {
out << "[" << (void*)&ab << "] ";
return ab.print(out);
}
};
CRTP Base
template<class ActualType>
class Base: public AbstractBase {
virtual bool base_equals(const AbstractBase& other)const override final {
return static_cast<const ActualType&>(*this)
== static_cast<const ActualType&>(other);
}
};
Actual Classes
class A: public Base<A> {
int num;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << num;
}
public:
A(int i = 42): num(i) {}
bool operator==(const A& a)const {
return num == a.num;
}
};
class B: public Base<B> {
std::string str;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << str;
}
public:
B(const std::string& s = "hello"): str(s) {}
bool operator==(const B& b)const {
return str == b.str;
}
};
Usage Example
int main() {
A a1, a2, a3 = 5;
B b1, b2, b3 = {"bye"};
std::vector<const AbstractBase*> arr = {&a1, &a2, &a3, &b1, &b2, &b3};
for(auto v1: arr) {
for(auto v2: arr) {
std::cout << *v1 << " == " << *v2 << " ? "
<< std::boolalpha << (*v1 == *v2) << std::endl;
}
}
}
Output
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0d0] 5 ? true
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f140] bye ? true
Code:
http://coliru.stacked-crooked.com/a/17f786455c192ab9
c++ polymorphism overloading
asked 5 mins ago
Amir KirshAmir Kirsh
1213
add a comment |
0
Trying to implement equality for all types that share same base.
Came to the following solution, with CRTP -- would appreciate comments.
AbstractBase
class AbstractBase {
virtual bool base_equals(const AbstractBase& other) const = 0;
virtual std::ostream& print(std::ostream& out = std::cout) const = 0;
public:
bool operator==(const AbstractBase& other)const {
if(typeid(*this)==typeid(other)) {
return this->base_equals(other);
}
return false;
}
friend std::ostream& operator<<(std::ostream& out, const AbstractBase& ab) {
out << "[" << (void*)&ab << "] ";
return ab.print(out);
}
};
CRTP Base
template<class ActualType>
class Base: public AbstractBase {
virtual bool base_equals(const AbstractBase& other)const override final {
return static_cast<const ActualType&>(*this)
== static_cast<const ActualType&>(other);
}
};
Actual Classes
class A: public Base<A> {
int num;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << num;
}
public:
A(int i = 42): num(i) {}
bool operator==(const A& a)const {
return num == a.num;
}
};
class B: public Base<B> {
std::string str;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << str;
}
public:
B(const std::string& s = "hello"): str(s) {}
bool operator==(const B& b)const {
return str == b.str;
}
};
Usage Example
int main() {
A a1, a2, a3 = 5;
B b1, b2, b3 = {"bye"};
std::vector<const AbstractBase*> arr = {&a1, &a2, &a3, &b1, &b2, &b3};
for(auto v1: arr) {
for(auto v2: arr) {
std::cout << *v1 << " == " << *v2 << " ? "
<< std::boolalpha << (*v1 == *v2) << std::endl;
}
}
}
Output
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0d0] 5 ? true
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f140] bye ? true
Code:
http://coliru.stacked-crooked.com/a/17f786455c192ab9
c++ polymorphism overloading
asked 5 mins ago
Amir KirshAmir Kirsh
1213
add a comment |
0
0
0
Trying to implement equality for all types that share same base.
Came to the following solution, with CRTP -- would appreciate comments.
AbstractBase
class AbstractBase {
virtual bool base_equals(const AbstractBase& other) const = 0;
virtual std::ostream& print(std::ostream& out = std::cout) const = 0;
public:
bool operator==(const AbstractBase& other)const {
if(typeid(*this)==typeid(other)) {
return this->base_equals(other);
}
return false;
}
friend std::ostream& operator<<(std::ostream& out, const AbstractBase& ab) {
out << "[" << (void*)&ab << "] ";
return ab.print(out);
}
};
CRTP Base
template<class ActualType>
class Base: public AbstractBase {
virtual bool base_equals(const AbstractBase& other)const override final {
return static_cast<const ActualType&>(*this)
== static_cast<const ActualType&>(other);
}
};
Actual Classes
class A: public Base<A> {
int num;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << num;
}
public:
A(int i = 42): num(i) {}
bool operator==(const A& a)const {
return num == a.num;
}
};
class B: public Base<B> {
std::string str;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << str;
}
public:
B(const std::string& s = "hello"): str(s) {}
bool operator==(const B& b)const {
return str == b.str;
}
};
Usage Example
int main() {
A a1, a2, a3 = 5;
B b1, b2, b3 = {"bye"};
std::vector<const AbstractBase*> arr = {&a1, &a2, &a3, &b1, &b2, &b3};
for(auto v1: arr) {
for(auto v2: arr) {
std::cout << *v1 << " == " << *v2 << " ? "
<< std::boolalpha << (*v1 == *v2) << std::endl;
}
}
}
Output
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0d0] 5 ? true
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f140] bye ? true
Code:
http://coliru.stacked-crooked.com/a/17f786455c192ab9
c++ polymorphism overloading
asked 5 mins ago
Amir KirshAmir Kirsh
1213
Trying to implement equality for all types that share same base.
Came to the following solution, with CRTP -- would appreciate comments.
AbstractBase
class AbstractBase {
virtual bool base_equals(const AbstractBase& other) const = 0;
virtual std::ostream& print(std::ostream& out = std::cout) const = 0;
public:
bool operator==(const AbstractBase& other)const {
if(typeid(*this)==typeid(other)) {
return this->base_equals(other);
}
return false;
}
friend std::ostream& operator<<(std::ostream& out, const AbstractBase& ab) {
out << "[" << (void*)&ab << "] ";
return ab.print(out);
}
};
CRTP Base
template<class ActualType>
class Base: public AbstractBase {
virtual bool base_equals(const AbstractBase& other)const override final {
return static_cast<const ActualType&>(*this)
== static_cast<const ActualType&>(other);
}
};
Actual Classes
class A: public Base<A> {
int num;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << num;
}
public:
A(int i = 42): num(i) {}
bool operator==(const A& a)const {
return num == a.num;
}
};
class B: public Base<B> {
std::string str;
virtual std::ostream& print(std::ostream& out = std::cout) const {
return out << str;
}
public:
B(const std::string& s = "hello"): str(s) {}
bool operator==(const B& b)const {
return str == b.str;
}
};
Usage Example
int main() {
A a1, a2, a3 = 5;
B b1, b2, b3 = {"bye"};
std::vector<const AbstractBase*> arr = {&a1, &a2, &a3, &b1, &b2, &b3};
for(auto v1: arr) {
for(auto v2: arr) {
std::cout << *v1 << " == " << *v2 << " ? "
<< std::boolalpha << (*v1 == *v2) << std::endl;
}
}
}
Output
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0b0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0b0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0c0] 42 ? true
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0c0] 42 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0d0] 5 ? true
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f0d0] 5 == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f0e0] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f110] hello == [0x7ffefdb7f0e0] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f110] hello ? true
[0x7ffefdb7f110] hello == [0x7ffefdb7f140] bye ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0b0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0c0] 42 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0d0] 5 ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f0e0] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f110] hello ? false
[0x7ffefdb7f140] bye == [0x7ffefdb7f140] bye ? true
Code:
http://coliru.stacked-crooked.com/a/17f786455c192ab9
c++ polymorphism overloading
c++ polymorphism overloading
asked 5 mins ago
Amir KirshAmir Kirsh
1213
asked 5 mins ago
Amir KirshAmir Kirsh
1213
asked 5 mins ago
Amir KirshAmir Kirsh
1213
asked 5 mins ago
Amir KirshAmir Kirsh
1213
asked 5 mins ago
Amir KirshAmir Kirsh
1213
1213
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
});
});
}, "mathjax-editing");
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "196"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f211445%2fpolymorphic-implementation-for-with-crtp%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
draft saved
draft discarded
Thanks for contributing an answer to Code Review Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f211445%2fpolymorphic-implementation-for-with-crtp%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
