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init checks and 'out' parameters (#14521)

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* I don't care about observable stores
* enforce explicit initializations
* cleaner code for the stdlib
* stdlib: use explicit initializations
* make tests green
* algorithm.nim: set result explicitly
* remove out parameters and bring the PR into a mergable state
* updated the changelog
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Andreas Rumpf 2020-06-23 10:53:57 +02:00 • committed by GitHub
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6
doc/manual_experimental.rst
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@ -482,7 +482,7 @@ nil`` annotation to exclude ``nil`` as a valid value:
.. code-block:: nim
{.experimental: "notnil"}
type
PObject = ref TObj not nil
TProc = (proc (x, y: int)) not nil
@ -1828,8 +1828,8 @@ Aliasing restrictions in parameter passing
implementation and need to be fleshed out further.
"Aliasing" here means that the underlying storage locations overlap in memory
at runtime. An "output parameter" is a parameter of type ``var T``, an input
parameter is any parameter that is not of type ``var``.
at runtime. An "output parameter" is a parameter of type ``var T``,
an input parameter is any parameter that is not of type ``var``.
1. Two output parameters should never be aliased.
2. An input and an output parameter should not be aliased.