CODEWITHSUNDEEP
c++templatesvariadic-templates
SandiaDeDia
SandiaDeDia

Reputation: 291

Problem with very simple variadic function

I am trying to use a very simple log function using variadic templates in C++:

void log(){}

template <typename T, typename... Types>
void log(T first, Types... arg)
{
    std::cout << first << " ";
    log(arg...);
}

int main()
{
    log(1,2);
    log(3, "four");
    log(5);
    log(6,"seven",8,9,10,11,12);
    log(13,14);

}

But in the output I am missing all the last arguments of the log function if the are integers (2, 5, 12 and 14) but not if they are strings ("four") !??. Why is that? What I am doing wrong?

output: 1 3 four 6 seven 8 9 10 11 13

Upvotes: 4

Views: 137

Answers (1)

catnip
catnip

Reputation: 25388

Mystery solved - when compiling with MSVC your choice of the name log is clashing with the log function in the standard library when there is only one numeric parameter. Since this doesn't print anything, output is missing.

Just use another name and it works.

Upvotes: 5

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