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fixes #2094

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This commit is contained in:
Andreas Rumpf 2016-08-09 15:12:30 +02:00
commit 1a470d1818
1 changed files with 3 additions and 0 deletions
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compiler/semstmts.nim
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@ -1309,6 +1309,7 @@ proc determineType(c: PContext, s: PSym) =
proc semIterator(c: PContext, n: PNode): PNode =
# gensym'ed iterator?
let isAnon = n[namePos].kind == nkEmpty
if n[namePos].kind == nkSym:
# gensym'ed iterators might need to become closure iterators:
n[namePos].sym.owner = getCurrOwner()
@ -1318,6 +1319,8 @@ proc semIterator(c: PContext, n: PNode): PNode =
var t = s.typ
if t.sons[0] == nil and s.typ.callConv != ccClosure:
localError(n.info, errXNeedsReturnType, "iterator")
if isAnon and s.typ.callConv == ccInline:
localError(n.info, "inline iterators are not first-class / cannot be assigned to variables")
# iterators are either 'inline' or 'closure'; for backwards compatibility,
# we require first class iterators to be marked with 'closure' explicitly
# -- at least for 0.9.2.