This seems to be answered – #include <fstream>.
The message means :-
incomplete type – the class has not been defined with a full class. The compiler has seen statements such as class ifstream; which allow it to understand that a class exists, but does not know how much memory the class takes up.
The forward declaration allows the compiler to make more sense of :-
void BindInput( ifstream & inputChannel );
It understands the class exists, and can send pointers and references through code without being able to create the class, see any data within the class, or call any methods of the class.
The has initializer seems a bit extraneous, but is saying that the incomplete object is being created.
Related Posts:
- How to read a file line by line or a whole text file at once?
- Using the fstream getline() function inside a class
- Reading from text file until EOF repeats last line
- What’s the difference between opening a file with ios::binary or ios::out or both?
- C++: Using ifstream with getline();
- Invalid conversion from ‘char’ to ‘const char *’
- “Incomplete type not allowed ” when creating std::ofstream objects
- system(“pause”); – Why is it wrong?
- What is the best way to use a HashMap in C++?
- Sleep for milliseconds
- What is an undefined reference/unresolved external symbol error and how do I fix it?
- How to throw a C++ exception
- The static keyword and its various uses in C++
- What is the ‘override’ keyword in C++ used for? [duplicate]
- Unresolved external symbol in object files
- How to correctly use Boolean functions?
- C++ Error: “Expression must have integral or enum type” [duplicate]
- c++ compile error: ISO C++ forbids comparison between pointer and integer
- How do I declare a 2d array in C++ using new?
- What does “#include
” do? - How to convert an instance of std::string to lower case
- Error: No viable overloaded =
- Random number between 1 to 10 using C++
- Expected initializer before namespace
- A proper way to create a matrix in c++
- No matching member function for call to ‘push_back’ error
- “X does not name a type” error in C++
- Difference between long double and double in C and C++ [duplicate]
- Compiling C++11 with g++
- Setting an int to Infinity in C++
- What exactly is std::atomic?
- Separating class code into a header and cpp file
- Deep copy vs Shallow Copy
- Pointer to incomplete class type is not allowed
- C++ error: “Array must be initialized with a brace enclosed initializer”
- Why am I getting string does not name a type Error?
- How to avoid the error: terminate called after throwing an instance of ‘std::logic_error’ what(): basic_string::_S_construct null not valid
- How to ensure that a std::map is ordered?
- How to write C++ getters and setters
- std::out_of_range error?
- Checking cin input stream produces an integer
- Where do “pure virtual function call” crashes come from?
- How to convert vector to array
- “non-standard syntax; use ‘&’ to create a pointer to member” error in Visual Studio 2015
- Understanding glm::lookAt()
- How to get current timestamp in milliseconds since 1970 just the way Java gets
- What is the best open XML parser for C++?
- *** No rule to make target ‘class.cpp’, needed by `build/….x86/class.o` Stop. error in Ubuntu
- Hash function for a string
- CMake error at CMakeLists.txt:30 (project): No CMAKE_C_COMPILER could be found
- How to run valgrind with basic c example?
- initial value of reference to non-const must be an lvalue
- Typedef function pointer?
- cc1plus: error: unrecognized command line option “-std=c++11” with g++
- cannot declare variable ‘’ to be of abstract type ‘’
- Difference between ‘struct’ and ‘typedef struct’ in C++?
- Cannot open output file, permission denied
- Strange error C2131: expression did not evaluate to a constant in VC 2015
- error: called object type ‘int’ is not a function or function pointer
- Hash function for a string
- Is there a replacement for unistd.h for Windows (Visual C)?
- How to call on a function found on another file?
- How to project a point onto a plane in 3D?
- Using C-string gives Warning: “Address of stack memory associated with local variable returned”
- generate random double numbers in c++
- Cygwin Make bash command not found
- C++ Compiler Error C2280 “attempting to reference a deleted function” in Visual Studio 2013 and 2015
- Why use pointers?
- What is wrong with using goto?
- Double pointer array in c++
- Don’t understand static boolean behavior
- How to write std::string to file?
- Member declaration not found
- What is the difference between a .cpp file and a .h file?
- Stable Cotangent
- How to change string into QString?
- Including .cpp files
- Class template inheritance C++
- C++ error: undefined reference to ‘clock_gettime’ and ‘clock_settime’
- Converting String to Cstring in C++
- C++ compiler error: “return type specification for constructor invalid”
- error: ISO C++ forbids in-class initialization of non-const static member
- Function call missing argument list to create pointer
- cannot specify explicit initializer for arrays
- What does ** mean in C++?
- Incomplete type is not allowed: stringstream
- Initializing default values in a struct
- Warning: comparison of distinct pointer types
- Two decimal places using printf( )
- error C2244 unable to match function definition to an existing declaration
- Initializing pointers in C++
- Static vs dynamic type checking in C++
- “No rule to make target ‘install'”… But Makefile exists
- Proper way to pass dynamic arrays to other functions
- How to fix ‘std::logic_error’ what(): basic_string::_M_construct null not valid error?
- Unexpected end of file error
- virtual memory exhausted: Cannot allocate memory
- How to find and replace string?
- allocating an object of abstract class type error
- “Cannot allocate an object of abstract type” error