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fixes #2420; negative indexing for slicing is obsolete (breaking change!)

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Araq 2015-03-28 00:15:04 +01:00
commit 2b80d75aa2
8 changed files with 82 additions and 79 deletions
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compiler/semmagic.nim
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@ -167,10 +167,10 @@ proc magicsAfterOverloadResolution(c: PContext, n: PNode,
result.typ = n[1].typ
of mDotDot:
result = n
# we only need to warnings here about negative indexing:
if isNegative(n.sons[1]) or (n.len > 2 and isNegative(n.sons[2])):
message(n.info, warnDeprecated,
"use '^' instead of '-'; negative indexing")
# disallow negative indexing for now:
if not c.p.bracketExpr.isNil:
if isNegative(n.sons[1]) or (n.len > 2 and isNegative(n.sons[2])):
localError(n.info, "use '^' instead of '-'; negative indexing is obsolete")
of mRoof:
# error correction:
result = n.sons[1]