C++: warning: C4930: prototyped function not called (was a variable definition intended?)
c++, class, compiler-warnings, declaration, visual-studio-2008
Solution
This
MyClass foo();
is a function declaration that has return type MyClass and does not accept arguments..
This
MyClass foo;
is an object definition. As your class MyClass has no the default constructor the compiler issues an error.
Problem
I have a class that does not have a default constructor, I created a variable without giving parameters by mistake, but instead of a nice compiler error, I got a linker error, where I couldn't find the line of code that was causing it. In the end, I managed to find the code that caused this, and only then I noticed that I was getting this warning: ``` C++: warning: C4930: prototyped function not called (was a variable definition intended?) ``` What's weird is when I changed the code from: ``` MyClass foo(); ``` to ``` MyClass foo; ``` I did get a compiler error. Can someone explain to me why the compiler suddenly started acting strange, is it a bug or something?