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preparations for language extensions: 'sink' and 'lent' types

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This commit is contained in:
Andreas Rumpf 2018-01-07 23:09:26 +01:00
commit e4081a7201
34 changed files with 183 additions and 178 deletions
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4
compiler/lowerings.nim
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@ -330,7 +330,7 @@ proc typeNeedsNoDeepCopy(t: PType): bool =
# note that seq[T] is fine, but 'var seq[T]' is not, so we need to skip 'var'
# for the stricter check and likewise we can skip 'seq' for a less
# strict check:
if t.kind in {tyVar, tySequence}: t = t.sons[0]
if t.kind in {tyVar, tyLent, tySequence}: t = t.lastSon
result = not containsGarbageCollectedRef(t)
proc addLocalVar(varSection, varInit: PNode; owner: PSym; typ: PType;
@ -469,7 +469,7 @@ proc setupArgsForConcurrency(n: PNode; objType: PType; scratchObj: PSym,
# we pick n's type here, which hopefully is 'tyArray' and not
# 'tyOpenArray':
var argType = n[i].typ.skipTypes(abstractInst)
if i < formals.len and formals[i].typ.kind == tyVar:
if i < formals.len and formals[i].typ.kind in {tyVar, tyLent}:
localError(n[i].info, "'spawn'ed function cannot have a 'var' parameter")
#elif containsTyRef(argType):
# localError(n[i].info, "'spawn'ed function cannot refer to 'ref'/closure")