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Of operator in vm fixes [backport] (#9717)

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* fixes #9701
*  fixes #9702
* optimize of statement to bool
This commit is contained in:
cooldome 2018-11-15 12:03:42 +00:00 • committed by Andreas Rumpf
commit 8c1083d3b7
6 changed files with 65 additions and 7 deletions
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8
compiler/semmagic.nim
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@ -306,7 +306,13 @@ proc semOf(c: PContext, n: PNode): PNode =
result.typ = getSysType(c.graph, n.info, tyBool)
return result
elif diff == high(int):
localError(c.config, n.info, "'$1' cannot be of this subtype" % typeToString(a))
if commonSuperclass(a, b) == nil:
localError(c.config, n.info, "'$1' cannot be of this subtype" % typeToString(a))
else:
message(c.config, n.info, hintConditionAlwaysFalse, renderTree(n))
result = newIntNode(nkIntLit, 0)
result.info = n.info
result.typ = getSysType(c.graph, n.info, tyBool)
else:
localError(c.config, n.info, "'of' takes 2 arguments")
n.typ = getSysType(c.graph, n.info, tyBool)