arc optimizations (#13325)

* scope based destructors
* handle 'or' and 'and' expressions properly, see the new test arc/tcontrolflow.nim
* make this branch mergable, logic is disabled for now
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Andreas Rumpf 2020-03-18 16:57:34 +01:00 • committed by GitHub
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@ -7,7 +7,7 @@
# distribution, for details about the copyright.
#
## This module implements code generation for multi methods.
## This module implements code generation for methods.
import
intsets, options, ast, msgs, idents, renderer, types, magicsys,