Nested templated class: unable to match function definition to an existing declaration

Asked May 10 '13 at 23:37

Active May 10 '13 at 23:55

Viewed 378 times

Using MSVC++ 2010 (NVCC (CUDA) compiler), defining a nested templated class member of a non-templated parent class outside its declaration block:

class cls {
public:
    template <typename V> class nest {
    public:
        template <typename W> void bar(W x);
    };
};

template <typename V>
template <typename W>
void cls::nest<V>::bar(W x) {}

yields:

error C2244: 'bar' : unable to match function definition to an existing declaration
1>          definition
1>          'void cls::nest<V>::bar(W)'
1>          existing declarations
1>          'void cls::nest<V>::bar(W)'

why?

Update: appears to be an NVCC bug. http://ideone.com/rc7R32 works, but not with NVCC. Anyone from Nvidia around to comment?

edited May 10 '13 at 23:55

asked May 10 '13 at 23:37

mchen

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Mine compiles I'm not sure what the error your getting is – aaronman May 10 '13 at 23:41
MSVC probably has a bug, I used clang, g++ also works, this isn't cuda but I also just compiled it with nvcc – aaronman May 10 '13 at 23:43
compiling as strict as it gets with `g++ -c -pedantic -Wall -Wextra -std=c++98` gives no warnings or errors. MSVC is dumb – Ryan Haining May 10 '13 at 23:46
Indeed http://ideone.com/rc7R32 works, but fails with NVCC. Putting it down to Nvidia bug. – mchen May 10 '13 at 23:53

Nested templated class: unable to match function definition to an existing declaration

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