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spec for view types (#15424)

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* spec for view types
* spec additions
* refactoring; there are two different kinds of views
* refactorings and spec additions
* enforce that view types are initialized
* enforce borrowing from the first formal parameter
* enforce lifetimes for borrowing of locals
* typo in the manual
* clarify in the implementation what a borrow operation really is
This commit is contained in:
Andreas Rumpf 2020-09-29 23:42:38 +02:00 • committed by GitHub
commit 4058801607
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11 changed files with 446 additions and 66 deletions
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4
compiler/sempass2.nim
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@ -10,7 +10,7 @@
import
intsets, ast, astalgo, msgs, renderer, magicsys, types, idents, trees,
wordrecg, strutils, options, guards, lineinfos, semfold, semdata,
modulegraphs, varpartitions
modulegraphs, varpartitions, typeallowed
when defined(useDfa):
import dfa
@ -1244,7 +1244,7 @@ proc trackProc*(c: PContext; s: PSym, body: PNode) =
var mutationInfo = MutationInfo()
if {strictFuncs, views} * c.features != {}:
var partitions = computeGraphPartitions(s, body)
var partitions = computeGraphPartitions(s, body, g.config)
if not t.hasSideEffect and t.hasDangerousAssign:
t.hasSideEffect = varpartitions.hasSideEffect(partitions, mutationInfo)
if views in c.features: