Linker error with templates
I'm having a problem with the following scheme. If everything is in one source file, it compiles and links fine:
Code:
#include <iostream>
enum Type {TYPE_A, TYPE_B};
class Test
{
public:
template <Type N>
void foo();
void a();
void b();
};
void Test::a()
{
std::cout << "A\n";
}
void Test::b()
{
std::cout << "B\n";
}
template <>
void Test::foo<TYPE_A>()
{
a();
}
template <>
void Test::foo<TYPE_B>()
{
b();
}
int main()
{
Test t;
t.foo<TYPE_A>();
t.foo<TYPE_B>();
std::cin.get();
}
However, when I try to break this up into multiple files (as follows), I get multiple definition of Test::foo<>. What am I missing?
Code:
//type.h
#ifndef TYPE_H
#define TYPE_H
enum Type {TYPE_A, TYPE_B};
#endif
//test.h
#ifndef TEST_H
#define TEST_H
#include "type.h"
class Test
{
public:
template <Type N>
void foo();
void a();
void b();
};
#include "foo.cpp"
#endif
//test.cpp
#include "test.h"
#include <iostream>
void Test::a()
{
std::cout << "A\n";
}
void Test::b()
{
std::cout << "B\n";
}
//foo.cpp
template <>
void Test::foo<TYPE_A>()
{
a();
}
template <>
void Test::foo<TYPE_B>()
{
b();
}
//main.cpp
#include "test.h"
#include "type.h"
#include <iostream>
int main()
{
Test t;
t.foo<TYPE_A>();
t.foo<TYPE_B>();
std::cin.get();
}
(foo.cpp is not compiled separately.)
