# op
Generic, exception-free return values.

OP stands for "Operation Result".

This module contains a generic type that can be used as a return type for operations that could fail. It adds additional messages to the result.
This improves upon the [options module](https://nim-lang.org/docs/options.html) in that additional messages can be passed along with the presence or absence of a value.

## Basic Usage
``` nim
import op

proc divide(a, b: int): OP[float] =
  ## This could fail
  if b == 0:
    return fail "Cannot divide by zero!"
  else:
    return ok a / b   # Wrap the result

let r = divide(42, 0)
assert r.isOk == false
assert r.error == "Cannot divide by zero!"
```