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Questions - dangling-pointer

Dangling reference solution

T&& operator[](std::size_t n) && noexcept {std::cout<<"move"<<std::endl; return std::move(vec[n]); } I cannot get the expected result in this part. I predict a da...
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gahhu

c++

reference

lifetime

temporary-objects

dangling-pointer

Votes: 0

Answers: 1

Latest Answer

For auto&& vec = my_vector<int>{1, 2, 3}[0];, the reference isn't bound to the temporary (i.e. my_vector<int>{1, 2, 3}) directly, its lifetime won't be extended. In general, the l...
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songyuanyao

What is the effect of calling a virtual method by a base class pointer bound to a derived object that has been deleted

The fllowing questions are: p->test() should not work after b is destroyed. However, the code is running without any issue, the dynamic binding still works; when the destructor of A is defined, th...
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Changhe Li

c++

virtual-functions

dangling-pointer

Votes: 0

Answers: 2

Latest Answer

p->test() should not work after b is destroyed. However, the code is running without any issue, the dynamic binding still works; It does not "work". p->test() invokes undefined beh...
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463035818_is_not_an_ai

C++ Dangling pointer issue

I am using the Raylib GUI framework for a project that displays all the nodes within an iteration of the Collatz Conjecture. In my program, I have a class for a Node object that acts simply as a circl...
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TheAngriestCrusader

c++

dangling-pointer

raylib

Votes: 0

Answers: 1

Latest Answer

In this line const char* text = std::to_string(value).c_str(); You are calling c_str() which returns a pointer to the buffer of the temporary returned by std::to_string(value). This temporaries lifet...
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463035818_is_not_an_ai

dangling reference in nested vector when parent container reallocates

thing contains 2 vectors, one of foo and one of bar. The bar instances contain references to the foos - the potentially dangling ones. The foo vector is filled precisely once, in things's constructor ...
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Oliver Sch&#246;nrock

c++

reference

dangling-pointer

Votes: 0

Answers: 1

Latest Answer

What you are guaranteed is, upon moving a std::vector, no iterator, pointer or reference will be invalidated. This would apply to the vectors inside thing. See notes in https://en.cppreference.com/w/c...
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Fatih BAKIR

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