On 1/4/22 9:48 AM, Paul Backus wrote:
> On Tuesday, 4 January 2022 at 17:01:41 UTC, Amit wrote:
>> I need a File (or a general IO interface) that reads from an
>> in-memory buffer, similar to python's `StringIO` or go's
>> `strings.Reader`.
>>
>> How can I achieve that?
I don't think it exists in the standard library. So, I had to write this
for work manually. Instead of using File on the interfaces, I created a
Storage interface that implemented everything I did with a File: open,
close, writeln, seek, etc.
interface Storage {
// ...
}
And I had two versions of it:
class FileStorage : Storage {
// ...
}
class InMemoryStorage : Storage {
ubyte[] buffer;
// ...
}
Worked like a charm after fixing a number of bugs. (I wish it were open
source.)
> Probably the easiest way to do it is to have your parser take a generic
> [range][1] as its argument instead of a `File`.
Makes sense but in my case File was everywhere so it felt better to
abstract it away.
> For example, here's a function that parses an integer from an input
range:
In my case, it would have to be a RandomAccessRange because the file
format had self-references through offsets.
Ali
