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Questions - pimpl-idiom

C++ abi compatability without pimpl using abstract class

Suppose I have a class B_Impl which inherits and implements a pure abstract class B (not containing any data-fields). Suppose class A uses B_Impl via B* only. If I add a field to B_Impl.h (clearly, no...
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JenyaKh

c++

compilation

linker

abi

pimpl-idiom

Votes: 0

Answers: 1

Latest Answer

If I add a field to B_Impl.h (clearly, not included by A), will ABI compatability be preserved? Yes. If a translation unit doesn't include the definition of B_Impl, then changes to B_Impl won't affe...
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eerorika

Why does = default member initializer request instantiation of unique_ptr destructor while {} does not?

This is a follow up of this question: Does PIMPL idiom actually work using std::unique_ptr? The full example uses multiple files, so for the sake of this question I will reduce it here. The full worki...
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463035818_is_not_an_ai

c++

language-lawyer

unique-ptr

pimpl-idiom

template-instantiation

Votes: 0

Answers: 1

Latest Answer

It seems to be a language issue unrelated to std::unique_ptr. I would say a bug in both GCC and Clang. Here it is without std::unique_ptr. This one compiles: template<typename T> struct uptr { ...
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Amir Kirsh

Max Heap built with pimpl in c++ not working properly

I have a class built using the pimpl idiom that represents a binary max Heap and it is not working properly: the program compiles and prints the content of the array but the array is not sorted correc...
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Spyromancer

c++

pimpl-idiom

binary-heap

Votes: 0

Answers: 1

Latest Answer

I should see the array sorted as: 10->19->36->17->3->25->1->2->7 That can't be, because in main() function you don't even put 25 in :-) But anyway, here: for (size_t i = (pim...
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danadam

Constructor and destructor in c++ when using the pimpl idiom

I come from Java that has a different way in handling what's private and has to be hided regarding a class implementation and it also has a garbage collector which means there is no need for a destruc...
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Spyromancer

c++

pimpl-idiom

Votes: 0

Answers: 1

Latest Answer

This is an example of a correct way to implement PIMPL idiom in modern C++: foo.hpp #pragma once #include <memory> class Foo { public: Foo(); ~Foo(); Foo(Foo const &) = delete; Fo...
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dpronin

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