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first steps to explicit channels for thread communication; added mainThreadId

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Araq 2011-07-16 18:34:18 +02:00
commit 42e6130b2c
16 changed files with 155 additions and 71 deletions
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38
compiler/semstmts.nim
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@ -152,42 +152,32 @@ proc semCase(c: PContext, n: PNode): PNode =
closeScope(c.tab)
proc SemReturn(c: PContext, n: PNode): PNode =
var
restype: PType
a: PNode # temporary assignment for code generator
result = n
checkSonsLen(n, 1)
if not (c.p.owner.kind in {skConverter, skMethod, skProc, skMacro}):
if c.p.owner.kind notin {skConverter, skMethod, skProc, skMacro}:
globalError(n.info, errXNotAllowedHere, "\'return\'")
if n.sons[0].kind != nkEmpty:
n.sons[0] = SemExprWithType(c, n.sons[0]) # check for type compatibility:
restype = c.p.owner.typ.sons[0]
if restype != nil:
a = newNodeI(nkAsgn, n.sons[0].info)
n.sons[0] = fitNode(c, restype, n.sons[0])
# optimize away ``return result``, because it would be transformed
# to ``result = result; return``:
if (n.sons[0].kind == nkSym) and (sfResult in n.sons[0].sym.flags):
n.sons[0] = ast.emptyNode
else:
if (c.p.resultSym == nil): InternalError(n.info, "semReturn")
addSon(a, semExprWithType(c, newSymNode(c.p.resultSym)))
addSon(a, n.sons[0])
n.sons[0] = a
else:
localError(n.info, errCannotReturnExpr)
if n.sons[0].kind != nkEmpty:
# transform ``return expr`` to ``result = expr; return``
if c.p.resultSym == nil: InternalError(n.info, "semReturn")
var a = newNodeI(nkAsgn, n.sons[0].info)
addSon(a, newSymNode(c.p.resultSym))
addSon(a, n.sons[0])
n.sons[0] = semAsgn(c, a)
# optimize away ``result = result``:
if n[0][1].kind == nkSym and sfResult in n[0][1].sym.flags:
n.sons[0] = ast.emptyNode
proc SemYield(c: PContext, n: PNode): PNode =
result = n
checkSonsLen(n, 1)
if (c.p.owner == nil) or (c.p.owner.kind != skIterator):
if c.p.owner == nil or c.p.owner.kind != skIterator:
GlobalError(n.info, errYieldNotAllowedHere)
if n.sons[0].kind != nkEmpty:
if n.sons[0].kind != nkEmpty:
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])
if (n.sons[0].typ == nil): InternalError(n.info, "semYield")
if n.sons[0].typ == nil: InternalError(n.info, "semYield")
else:
localError(n.info, errCannotReturnExpr)