Iterator subclass separate inclusion
2
I'm new to the iterator class; not in how to use iterators for containers but how to implement an iterator class. I have two files, a .h and .cpp. Right now, I'm getting a compiler error in my .cpp file that displays "fatal error: 'iterator' is not a class, namespace, or enumeration". I don't understand why its telling me this.
Note: I'm sure there are other errors in my code, but right now I'm just trying to get the existing compiler error resolved.
Base.h
#ifndef Base_h
#define Base_h
class Base {
protected:
std::vector<std::vector<std::string> > vec;
public:
class iterator {
private:
Base* p = nullptr;
size_t x, y;
public:
iterator() = default;
iterator(Base *, size_t, size_t);
~iterator();
iterator &operator++();
Base operator*() const;
}
iterator begin() const;
iterator end() const;
// bunch of other iterator::functions and Base::functions
};
#endif
Base.cpp
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
iterator::~iterator();
// Bunch of other iterator::functions including Base::functions
Compiler Error
Base.cc:254:13: fatal error: 'iterator is not a class, namespace, or enumeration
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
^
/Library/Developer/CommandLineTools/usr/include/c++/v1/iterator:522:29: note: 'iterator' declared here
struct _LIBCPP_TEMPLATE_VIS iterator
c++ iterator
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
add a comment |
2
I'm new to the iterator class; not in how to use iterators for containers but how to implement an iterator class. I have two files, a .h and .cpp. Right now, I'm getting a compiler error in my .cpp file that displays "fatal error: 'iterator' is not a class, namespace, or enumeration". I don't understand why its telling me this.
Note: I'm sure there are other errors in my code, but right now I'm just trying to get the existing compiler error resolved.
Base.h
#ifndef Base_h
#define Base_h
class Base {
protected:
std::vector<std::vector<std::string> > vec;
public:
class iterator {
private:
Base* p = nullptr;
size_t x, y;
public:
iterator() = default;
iterator(Base *, size_t, size_t);
~iterator();
iterator &operator++();
Base operator*() const;
}
iterator begin() const;
iterator end() const;
// bunch of other iterator::functions and Base::functions
};
#endif
Base.cpp
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
iterator::~iterator();
// Bunch of other iterator::functions including Base::functions
Compiler Error
Base.cc:254:13: fatal error: 'iterator is not a class, namespace, or enumeration
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
^
/Library/Developer/CommandLineTools/usr/include/c++/v1/iterator:522:29: note: 'iterator' declared here
struct _LIBCPP_TEMPLATE_VIS iterator
c++ iterator
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
2
iteratoris a nested class: try qualifiying the implementation in cpp file withBase::iterator::iteratorOr try avoid to declare iterator as nested class
– Gian Paolo
Nov 19 '18 at 23:31
I believe that worked. Although, it came up with another compiler error but one I can deal with. Thanks. If all else fails, I may avoid a nested class. Thanks.
– N. Colostate
Nov 19 '18 at 23:36
1
well, as a start, why do you need a nested class? (actually, I just asked this myself) see also stackoverflow.com/questions/4571355/…
– Gian Paolo
Nov 19 '18 at 23:40
I decided on using a nested class through examples provided from various .edu addresses. So, I assume it was standard practice. From the comments so far, it doesn't seem that way.
– N. Colostate
Nov 19 '18 at 23:44
the following declarationBase operator*() const;seems suspicious. You really want to return a copy ofBase?
– Phil1970
Nov 20 '18 at 2:01
add a comment |
2
2
2
I'm new to the iterator class; not in how to use iterators for containers but how to implement an iterator class. I have two files, a .h and .cpp. Right now, I'm getting a compiler error in my .cpp file that displays "fatal error: 'iterator' is not a class, namespace, or enumeration". I don't understand why its telling me this.
Note: I'm sure there are other errors in my code, but right now I'm just trying to get the existing compiler error resolved.
Base.h
#ifndef Base_h
#define Base_h
class Base {
protected:
std::vector<std::vector<std::string> > vec;
public:
class iterator {
private:
Base* p = nullptr;
size_t x, y;
public:
iterator() = default;
iterator(Base *, size_t, size_t);
~iterator();
iterator &operator++();
Base operator*() const;
}
iterator begin() const;
iterator end() const;
// bunch of other iterator::functions and Base::functions
};
#endif
Base.cpp
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
iterator::~iterator();
// Bunch of other iterator::functions including Base::functions
Compiler Error
Base.cc:254:13: fatal error: 'iterator is not a class, namespace, or enumeration
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
^
/Library/Developer/CommandLineTools/usr/include/c++/v1/iterator:522:29: note: 'iterator' declared here
struct _LIBCPP_TEMPLATE_VIS iterator
c++ iterator
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
I'm new to the iterator class; not in how to use iterators for containers but how to implement an iterator class. I have two files, a .h and .cpp. Right now, I'm getting a compiler error in my .cpp file that displays "fatal error: 'iterator' is not a class, namespace, or enumeration". I don't understand why its telling me this.
Note: I'm sure there are other errors in my code, but right now I'm just trying to get the existing compiler error resolved.
Base.h
#ifndef Base_h
#define Base_h
class Base {
protected:
std::vector<std::vector<std::string> > vec;
public:
class iterator {
private:
Base* p = nullptr;
size_t x, y;
public:
iterator() = default;
iterator(Base *, size_t, size_t);
~iterator();
iterator &operator++();
Base operator*() const;
}
iterator begin() const;
iterator end() const;
// bunch of other iterator::functions and Base::functions
};
#endif
Base.cpp
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
iterator::~iterator();
// Bunch of other iterator::functions including Base::functions
Compiler Error
Base.cc:254:13: fatal error: 'iterator is not a class, namespace, or enumeration
iterator::iterator(Base *b, size_t i, size_t j): p(b), x(i), y(j) {}
^
/Library/Developer/CommandLineTools/usr/include/c++/v1/iterator:522:29: note: 'iterator' declared here
struct _LIBCPP_TEMPLATE_VIS iterator
c++ iterator
c++ iterator
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
asked Nov 19 '18 at 23:27
N. ColostateN. Colostate
356
356
2
iteratoris a nested class: try qualifiying the implementation in cpp file withBase::iterator::iteratorOr try avoid to declare iterator as nested class
– Gian Paolo
Nov 19 '18 at 23:31
I believe that worked. Although, it came up with another compiler error but one I can deal with. Thanks. If all else fails, I may avoid a nested class. Thanks.
– N. Colostate
Nov 19 '18 at 23:36
1
well, as a start, why do you need a nested class? (actually, I just asked this myself) see also stackoverflow.com/questions/4571355/…
– Gian Paolo
Nov 19 '18 at 23:40
I decided on using a nested class through examples provided from various .edu addresses. So, I assume it was standard practice. From the comments so far, it doesn't seem that way.
– N. Colostate
Nov 19 '18 at 23:44
the following declarationBase operator*() const;seems suspicious. You really want to return a copy ofBase?
– Phil1970
Nov 20 '18 at 2:01
add a comment |
2
iteratoris a nested class: try qualifiying the implementation in cpp file withBase::iterator::iteratorOr try avoid to declare iterator as nested class
– Gian Paolo
Nov 19 '18 at 23:31
I believe that worked. Although, it came up with another compiler error but one I can deal with. Thanks. If all else fails, I may avoid a nested class. Thanks.
– N. Colostate
Nov 19 '18 at 23:36
1
well, as a start, why do you need a nested class? (actually, I just asked this myself) see also stackoverflow.com/questions/4571355/…
– Gian Paolo
Nov 19 '18 at 23:40
I decided on using a nested class through examples provided from various .edu addresses. So, I assume it was standard practice. From the comments so far, it doesn't seem that way.
– N. Colostate
Nov 19 '18 at 23:44
the following declarationBase operator*() const;seems suspicious. You really want to return a copy ofBase?
– Phil1970
Nov 20 '18 at 2:01
2
2
iterator is a nested class: try qualifiying the implementation in cpp file with Base::iterator::iterator Or try avoid to declare iterator as nested class– Gian Paolo
Nov 19 '18 at 23:31
iterator is a nested class: try qualifiying the implementation in cpp file with Base::iterator::iterator Or try avoid to declare iterator as nested class– Gian Paolo
Nov 19 '18 at 23:31
I believe that worked. Although, it came up with another compiler error but one I can deal with. Thanks. If all else fails, I may avoid a nested class. Thanks.
– N. Colostate
Nov 19 '18 at 23:36
I believe that worked. Although, it came up with another compiler error but one I can deal with. Thanks. If all else fails, I may avoid a nested class. Thanks.
– N. Colostate
Nov 19 '18 at 23:36
1
1
well, as a start, why do you need a nested class? (actually, I just asked this myself) see also stackoverflow.com/questions/4571355/…
– Gian Paolo
Nov 19 '18 at 23:40
well, as a start, why do you need a nested class? (actually, I just asked this myself) see also stackoverflow.com/questions/4571355/…
– Gian Paolo
Nov 19 '18 at 23:40
I decided on using a nested class through examples provided from various .edu addresses. So, I assume it was standard practice. From the comments so far, it doesn't seem that way.
– N. Colostate
Nov 19 '18 at 23:44
I decided on using a nested class through examples provided from various .edu addresses. So, I assume it was standard practice. From the comments so far, it doesn't seem that way.
– N. Colostate
Nov 19 '18 at 23:44
the following declaration
Base operator*() const; seems suspicious. You really want to return a copy of Base?– Phil1970
Nov 20 '18 at 2:01
the following declaration
Base operator*() const; seems suspicious. You really want to return a copy of Base?– Phil1970
Nov 20 '18 at 2:01
add a comment |
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2
iteratoris a nested class: try qualifiying the implementation in cpp file withBase::iterator::iteratorOr try avoid to declare iterator as nested class– Gian Paolo
Nov 19 '18 at 23:31
I believe that worked. Although, it came up with another compiler error but one I can deal with. Thanks. If all else fails, I may avoid a nested class. Thanks.
– N. Colostate
Nov 19 '18 at 23:36
1
well, as a start, why do you need a nested class? (actually, I just asked this myself) see also stackoverflow.com/questions/4571355/…
– Gian Paolo
Nov 19 '18 at 23:40
I decided on using a nested class through examples provided from various .edu addresses. So, I assume it was standard practice. From the comments so far, it doesn't seem that way.
– N. Colostate
Nov 19 '18 at 23:44
the following declaration
Base operator*() const;seems suspicious. You really want to return a copy ofBase?– Phil1970
Nov 20 '18 at 2:01