On Tuesday, 12 December 2017 at 18:32:11 UTC, Luís Marques wrote:
What's the current state of the range specification?
-> https://dlang.org/phobos/std_range_primitives.html#isInputRange
For instance, do we have to call empty before calling front?
Spec: "r.front can be legally evaluated if and only if evaluating
r.empty has, or would have, equaled false."
Can front provide different answers each time (e.g. map)?
Spec: "r.front evaluated multiple times, without calling
r.popFront, or otherwise mutating the range object or the
underlying data, yields the same result for every evaluation."
Were these kinds of issues resolved or not?
Is Phobos respecting some consensual protocol or are there
still gotchas?
Yes, otherwise please open a bug.
