On 03.10.23 20:26, Paul Backus wrote:
Naturally, this lowering is completely absent from [the language spec's
section on `foreach`.][1] According to the spec, the only ways to
iterate over a `struct` type are `opApply` and the input range interface.
I think it would probably be less confusing to have both `opApply` and
`empty`/`front`/`popFront` take precedence over this lowering, but I
have no idea how much existing code would be broken by such a change. At
the very least, though, this needs to be documented.
[1]: https://dlang.org/spec/statement.html#foreach-statement
For some further reading, there's an open issue about the unexpected
slicing: https://issues.dlang.org/show_bug.cgi?id=14619
