Generating a sequence of zeros at compile time

Question

I have the following problem: ``` template< size_t... N_i > class A { public: // ... void foo() { bar( /* 0,...,0 <- sizeof...(N_i) many */); } }; ``` I want to call a function `bar` and pass `sizeof...(N_i)` many arguments to it which are all zeros, e.g., `bar(0,0,0)` in case `sizeof...(N_i) == 3`. How can this be implemented?

Accepted Answer

```
bar(((void)N_i, 0)...);
```

The comma operator will discard `N_i`, yielding just the right-hand operand's value (`0`). The cast is to prevent a warning about `N_i` being discarded.

Generating a sequence of zeros at compile time

Solution

Problem