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multi-methods need to be explicitly enabled (#10856)

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* multi-methods need to be explicitly enabled

* update changelog, manual and tutorial
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Miran 2019-03-18 08:21:38 +01:00 • committed by Andreas Rumpf
commit afeca3d9fe
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doc/tut2.rst
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@ -308,6 +308,9 @@ Note that in the example the constructors ``newLit`` and ``newPlus`` are procs
because it makes more sense for them to use static binding, but ``eval`` is a
method because it requires dynamic binding.
**Note:** Starting from Nim 0.20, to use multi-methods one must explicitly pass
``--multimethods:on`` when compiling.
In a multi-method all parameters that have an object type are used for the
dispatching: