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iterators now return tyIter(T);

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tyIter(T) represents an "iteration yielding values of type T"

I'm planning to use that in the context of the `is` operator
supporting predicates such as `C.items is iterator` and also
in the upcoming support for higher-order inline iterators.
This commit is contained in:
Zahary Karadjov 2014-03-05 01:14:37 +02:00
commit 5324c9ebba
6 changed files with 18 additions and 11 deletions
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4
compiler/semexprs.nim
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@ -1266,7 +1266,7 @@ proc semYield(c: PContext, n: PNode): PNode =
n.sons[0] = semExprWithType(c, n.sons[0]) # check for type compatibility:
var restype = c.p.owner.typ.sons[0]
if restype != nil:
n.sons[0] = fitNode(c, restype, n.sons[0])
n.sons[0] = fitNode(c, restype.base, n.sons[0])
if n.sons[0].typ == nil: internalError(n.info, "semYield")
semYieldVarResult(c, n, restype)
else:
@ -1884,7 +1884,7 @@ proc semExpr(c: PContext, n: PNode, flags: TExprFlags = {}): PNode =
message(n.info, warnDeprecated, "bind")
result = semExpr(c, n.sons[0], flags)
of nkTypeOfExpr, nkTupleTy, nkRefTy..nkEnumTy, nkStaticTy:
var typ = semTypeNode(c, n, nil).skipTypes({tyTypeDesc})
var typ = semTypeNode(c, n, nil).skipTypes({tyTypeDesc, tyIter})
result.typ = makeTypeDesc(c, typ)
#result = symNodeFromType(c, typ, n.info)
of nkCall, nkInfix, nkPrefix, nkPostfix, nkCommand, nkCallStrLit: