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conversions to unsigned numbers are not checked anymore; implements /… (#12688) [backport]

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* conversions to unsigned numbers are not checked anymore; implements / fixes https://github.com/nim-lang/RFCs/issues/175

* change the spec yet again to be less consistent but to make more sense; updated the changelog
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Andreas Rumpf 2019-11-20 17:08:43 +01:00 • committed by GitHub
commit c98e0e22ad
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6 changed files with 29 additions and 6 deletions
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compiler/ccgexprs.nim
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@ -1929,7 +1929,8 @@ proc genCast(p: BProc, e: PNode, d: var TLoc) =
proc genRangeChck(p: BProc, n: PNode, d: var TLoc, magic: string) =
var a: TLoc
var dest = skipTypes(n.typ, abstractVar)
if optRangeCheck notin p.options:
if optRangeCheck notin p.options or (dest.kind in {tyUInt..tyUInt64} and
checkUnsignedConversions notin p.config.legacyFeatures):
initLocExpr(p, n.sons[0], a)
putIntoDest(p, d, n, "(($1) ($2))" %
[getTypeDesc(p.module, dest), rdCharLoc(a)], a.storage)