On Thursday, 4 August 2022 at 13:08:21 UTC, pascal111 wrote:
1) Why the programmer needs to program "empty()", "front()",
and "popFront()" functions for ranges while they exist in the
language library? it seems there's no need to exert efforts for
that. "https://dlang.org/phobos/std_range_primitives.html";
- These functions are wrappers to use something as range
- Ranges need to implement the functions to keep their data
private, also there are complex types the need to handle data
differently
- Ranges must implement the functions so other function can
recognize it as such (eg. `isInputRange`) - there is no common
interface, it's determined by compile time
2) "front()", and "popFront()" are using fixed constants to
move forward the range, while they should use variables.
`front()` is always using the first element BUT `popFront()`
copies all elements except the first one into the variable (and
overwrites it), so it moves the data forward.
