In this post, we will see how to resolve structure identifier is not defined even though it is Question: I have a school project where I have to make my structures and functions in a .h header file. I’ve created ...
Question: I have a class I want to make a typedef which creates a Vector (column vector) which is equivalent to a Matrix with sizes N and 1. Something like that: Which produces compile error. The following creates something similar, ...
Question: In C++, is there any difference between: and: Best Answer: In C++, there is only a subtle difference. It’s a holdover from C, in which it makes a difference. The C language standard (C89 §3.1.2.3, C99 §6.2.3, and C11 ...
Question: I don’t think I fundamentally understand what an enum is, and when to use it. For example: What is really being declared here? Best Answer: Three things are being declared here: an anonymous enumerated type is declared, ShapeType is ...
Question: I know that in C++11 we can now use using to write type alias, like typedefs: Is, from what I understand, equivalent to: And that new syntax emerged from the effort to have a way to express “template typedef”: ...
Question: The following code compiles fine. header.h: impl.cpp: compilation command: The type Placeholder_Type does not exist anywhere and it doesn’t exist as a symbol in the output binary. Why is it legal to create a typedef for a type that ...
Question: I am trying to do a forward declaration of a struct in c++ that has a typename. Something like this is entirely valid: My struct just instead has a typename, so I tried this: However, I then get the ...
Question: I routinely come across code in large codebases that do not follow the standard convention for typedefs e.g. ThisType instead of this_type. Writing generic code where I can no longer rely on this_type means I have to provide some ...