On Thursday, 8 November 2018 at 13:58:55 UTC, Vinay Sajip wrote:
Excuse my ignorance, but from looking at the documentation on
std.range and a quick skim of the guides mentioned there near
the top, I can't see what the simple way is of creating an
InputRange!(ubyte) from strings, files etc. I would have
expected to find something in the DLang Tour about this, but
couldn't find anything. Please can someone tell me how to do
it? Just to be clear, I want to create an object which is an
InputRange!(ubyte) and pass that around, rather than e.g.
iterate over a string or a file.
You can iterate through a file one ubyte at a time using
`byChunk` and `joiner`:
auto r1 = stdin.byChunk(1024).joiner;
assert(is(typeof(r1.front) == ubyte));
You can iterate through a string one ubyte at a time using
`representation`:
auto r2 = "To be or not to be".representation;
assert(is(typeof(r2.front) == immutable(ubyte)));
To pass these ranges around using the `InputRange` interface, use
`inputRangeObject` to wrap them:
InputRange!ubyte r3 = inputRangeObject(r1);
InputRange!(immutable(ubyte)) r4 = inputRangeObject(r2);
