Hello all,
I am trying to implement a ("struct template" ? what is the
correct word ?) range that just forwards its primitives ("empty",
"front", "popFront") to another range, possibly with some very
limited filtering/alteration, as std.range.Take (just to learn).
Initially, the "front" member function (property) used to be
declared "const", but that was not accepted when the underlying
range (denoted "R" in the code below) was std.stdio.File.ByChunk
("Error: mutable method std.stdio.File.ByChunk.front is not
callable using a const object").
Is there any value in having the "front" range primitive declared
to be a "const" member function ?
And if so, is the following implementation okay ? Could it be
further simplified ?
struct Taker (R)
{
private R _r;
...
static if (functionAttributes ! (R.front) &
FunctionAttribute.const_)
public @property auto front () const { return
_r.front; }
else
public @property auto front () { return
_r.front; }
...
}
Thank you respectfully !
Drone1h
