On 3/27/14, Atila Neves <[email protected]> wrote:
> Why the (inout int = 0) instead of an empty parameter list?
Try removing it and compile std.range with -unittest. Here's what happens:
std\range.d(546): Error: static assert (isInputRange!(inout(int)[])) is false
The reason it's false is because the code wouldn't compile. Here's a test-case:
-----
import std.array;
void test()
{
inout(int)[] r = (inout(int)[]).init;
if (r.empty) {}
r.popFront();
auto h = r.front;
}
void main()
{
test();
}
-----
test.d(7): Error: variable test.test.r inout variables can only be
declared inside inout functions
So you need to add inout in the parameter list to avoid this compiler
error and to make your function work with any qualified range type.
