StackOverflow Questions for Tag: stdlaunder

Bernard

Reputation: 5676

Is it valid C++ to destroy an object and construct a new object into the same variable?

c++language-lawyerc++20lifetimestdlaunder

Score: 2

Answers: 1

HolyBlackCat

Reputation: 96801

Do I need `std::launder` when working with unions?

c++language-lawyerstdlaunder

Score: 5

Answers: 1

user10260481

Reputation: 23

Why is it undefined behavior to std::launder a multidimensional array?

c++undefined-behaviorstdlaunder

Score: 2

Answers: 1

getsoubl

Reputation: 1055

C++ Undefined behaviour when reinterpret cast is used

c++lifetimestdlaunder

Score: 0

Answers: 2

getsoubl

Reputation: 1055

C++ Undefined behaviour in vector access

c++undefined-behaviorstdlaunder

Score: 0

Answers: 2

user3188445

Reputation: 4784

Can you call virtual methods on a base class in a union when a derived class is active?

c++language-lawyerunionsc++23stdlaunder

Score: 4

Answers: 1

user5876164

Reputation: 503

Constructing class or structures in an improper way using std::launder

c++stdlaunder

Score: 3

Answers: 1

tmlen

Reputation: 9090

Is std::launder needed after std::uninitialized_default_construct

c++memory-managementc++17allocatorstdlaunder

Score: 4

Answers: 1

Amb

Reputation: 21

Can ubsan catch launder

c++ubsanstdlaunder

Score: 1

Answers: 0

bitmask

Reputation: 34644

Do laundered pointers destroy optimisation opportunities?

c++optimizationlanguage-lawyermachine-codestdlaunder

Score: 8

Answers: 0

xxhxx

Reputation: 901

Why is this std::launder example undefined behavior?

c++language-lawyerundefined-behaviorstdlaunder

Score: 8

Answers: 1

geza

Reputation: 29970

Can std::launder be used to convert an object pointer to its enclosing array pointer?

c++c++17language-lawyerstdlaunder

Score: 16

Answers: 2

Oliv

Reputation: 18081

Using std::launder to "validate" non "pointer to object" pointer value since C++17

c++pointersc++17stdlaunder

Score: 21

Answers: 1

alfC

Reputation: 16300

Where can I find what std::launder really does?

c++c++17reinterpret-castpointer-aliasingstdlaunder

Score: 4

Answers: 1

Brian Bi

Reputation: 119467

Do we need to use std::launder when doing pointer arithmetic within a standard-layout object (e.g., with offsetof)?

c++c++17language-lawyeroffsetofstdlaunder

Score: 30

Answers: 1

user1574690

Reputation: 13

std::launder do not work on gcc with -O3 option?

c++c++17undefined-behaviorstdlaunder

Score: 1

Answers: 1

Barry

Reputation: 303636

What is the purpose of std::launder?

c++memoryc++17c++-faqstdlaunder

Score: 386

Answers: 3

Dr. Gut

Reputation: 2856

Constructing a const object over itself

c++c++20undefined-behaviorlifetimestdlaunder

Score: 3

Answers: 0

user17732522

Reputation: 76829

Does implicit object creation circumvent reachability conditions of std::launder?

c++language-lawyerreinterpret-caststdlaunder

Score: 3

Answers: 0

user17732522

Reputation: 76829

std::launder vs placement-new reachability condition

c++language-lawyerplacement-newstdlaunder

Score: 5

Answers: 0

PreviousPage 1Next

StackOverflow Questions for Tag: stdlaunder

Is it valid C++ to destroy an object and construct a new object into the same variable?

Do I need `std::launder` when working with unions?

Why is it undefined behavior to std::launder a multidimensional array?

C++ Undefined behaviour when reinterpret cast is used

C++ Undefined behaviour in vector access

Can you call virtual methods on a base class in a union when a derived class is active?

Constructing class or structures in an improper way using std::launder

Is std::launder needed after std::uninitialized_default_construct

Can ubsan catch launder

Do laundered pointers destroy optimisation opportunities?

Why is this std::launder example undefined behavior?

Can std::launder be used to convert an object pointer to its enclosing array pointer?

Using std::launder to &quot;validate&quot; non &quot;pointer to object&quot; pointer value since C++17

Where can I find what std::launder really does?

Do we need to use std::launder when doing pointer arithmetic within a standard-layout object (e.g., with offsetof)?

std::launder do not work on gcc with -O3 option?

What is the purpose of std::launder?

Constructing a const object over itself

Does implicit object creation circumvent reachability conditions of std::launder?

std::launder vs placement-new reachability condition

Using std::launder to "validate" non "pointer to object" pointer value since C++17