Suppose I have a class with some constant member: class MyClass { public: MyClass(int a) : a(a) { } MyClass() : MyClass(0) { } ~MyClass() { } const int a; }; Now I want to store an instance of MyClass somewhere, e.g. as a global variable or as an attribute of another object. MyClass var; ..
Category : assignment-operator
We use Coverity’s Synopsys which runs over the code base and flags lines of code that would cause a bug. Class XYZ::Math::MintermCoverage owns resources that are freed in its destructor but has no user-written assignment operator. free_resource: The destructor frees member mImplicant. I don’t understand how to fix this coverity MISSING ASSIGNMENT OPERATOR: This class ..
Why am I getting 1 as output instead of 7 ( if a is initially assigned with 12 , then a-5 should give 7) or 3 as ( if a is assigned with 8 then a-5 should give 3 ). The output remains 1 always irrespective of the value assigned to a. int main() { ..
The following code would lead to compiler errors: #include <optional> class A { }; class B { private: const A a; }; int main() { B b; std::optional<B> bo1; bo1 = b; } On gcc, for example, the error reads: main.cpp: In function ‘int main()’: main.cpp:12:7: error: uninitialized const member in ‘class B’ 12 | ..
I created a linked list called ScanList containing nodes of object Scan. But when I remove the first Scan from the linked list and close the program, I get an exception of type "Access violation reading location" at the destructor of ScanList. The function where I remove Scan from the ScanList is below. bool ScanList::removeScan(int ..
This started out as an excersize to learn C++ templates. I choose to reimplement a hash map from scratch, without any using STL at all. I figured that while I cant yet read and understand the very detailed solutions in the platform implemenations, I would learn a lot by this exercise. I was almost done ..
The code below copies the cstring to make sure the value is still stored even if the cstring changes after it has been assigned. The code below saves off the index when op[] is called. It keeps it waiting for the call to the op= or the op cast. Is the order of operator call ..
In my program, I am trying to use the assignment operator= to assign an object of my class. I am specifically trying to call the assignment operator instead of an implicit constructor (thus the explicit keyword). When I try to compile, I get a C2440 Compiler Error: class MyClass { public: explicit MyClass(double x = ..
I’m replacing an implementation of a Variant (based on from Poco) with the std::variant from c++17. With the following code, I am able to convert a Variant object to any of the types the std::variant holds, where appropriate. However, I am having difficulty going in the other direction – i.e. how to to implicitly cast ..
Is it a viable solution to use placement new to circumvent copy assignment? I have a member object that contains const members. The object itself is meant to be created at runtime, but it’s members are meant to be const. I was wondering whether I could use placement new to circumvent the copy assignment at ..
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