On Sunday, 11 January 2015 at 13:25:59 UTC, ketmar via
Digitalmars-d wrote:
On Sun, 11 Jan 2015 13:06:26 +0000
Dicebot via Digitalmars-d <digitalmars-d@puremagic.com> wrote:
What is your opinion of approach advertised by various
functional languages and now also Rust? Where you return error
code packed with actual data and can't access data without
visiting error code too, compiler simply won't allow it.
from my POV it trashes logic with error checking. hey, i don't
care if
*each* `fwrite()` is successfull, i only care if all of them
are ok or
at least one (any one) failed!
This is where monads and applicatives shine. You can describe the
general logic (run 'till first error or collect and combine all
errors or something else) in one place and then apply this way of
error handling throughout with minimal code, and you can often
change the error handling approach later just by changing a type,
without editing actual function source code.
