Top "Forward-declaration" questions

Forward declarations allow statically-typed programs to indicate the type and name of a symbol without actually defining it.

Does int main() need a declaration on C++?

When reading about functions in C++, I was taught that functions need declarations to be called. For example: #include <…

c++ main forward-declaration function-declaration
Forward declaration as struct vs class

I found a mistake in a C++ forward declaration of a class, which was wrongly declared as struct Book instead …

c++ struct forward-declaration
forward declaration in typescript

I've got two classes that need to know one another's members. In C++ I'd use a forward declaration. What do …

typescript forward-declaration
forward declaration with vector of class type - pointer to incomplete class type not allowed

I have two classes, foo and bar. foo.h #includes bar.h and contains a std::vector of pointers to …

c++ circular-dependency forward-declaration
forward declaration of procedure in delphi

How can I make a forward declaration of a procedure in Delphi and make it's implementation in other place? I …

delphi procedure forward-declaration
Illegal forward reference error for static final fields

I'm trying to compile a Java class which javac rejects with an illegal forward reference error, where the offending reference …

java javac forward-declaration