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README.rst

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+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 module 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
+-----------
+.. code-block:: nim
+ 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!"