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fixes #19291; implements wasMoved hook (#21303)

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* fixes #19291; implements `wasMoved` hook

* basics

* checkpoint

* finish `wasMoved`

* add a test for #19291

* add documentation and changelog

* work `attachedWasMoved` with generics

* fixes optimizer

* register `=wasMoved`

* handle wasMoved magcis

* check another round

* some patches

* try `op == nil`

* nicer

* generate `wasMoved` before `destroy`

* try again

* fixes tests

* default wasMoved

* Update tests/destructor/tv2_cast.nim

* Update tests/destructor/tv2_cast.nim

* Update tests/arc/topt_refcursors.nim
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ringabout 2023-03-02 12:29:40 +08:00 • committed by GitHub
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doc/manual.md
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@ -4122,7 +4122,7 @@ the operator is in scope (including if it is private).
```
Type bound operators are:
`=destroy`, `=copy`, `=sink`, `=trace`, `=deepcopy`.
`=destroy`, `=copy`, `=sink`, `=trace`, `=deepcopy`, `=wasMoved`.
These operations can be *overridden* instead of *overloaded*. This means that
the implementation is automatically lifted to structured types. For instance,