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further steps to closure support

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This commit is contained in:
Araq
2012-02-06 00:19:56 +01:00
parent 0d4c8ec70c
commit 632aece191
20 changed files with 379 additions and 138 deletions
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14
compiler/semexprs.nim
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@@ -50,6 +50,10 @@ proc inlineConst(n: PNode, s: PSym): PNode {.inline.} =
result.typ = s.typ
result.info = n.info
proc illegalCapture(s: PSym): bool {.inline.} =
result = skipTypes(s.typ, abstractInst).kind in {tyVar, tyOpenArray} or
s.kind == skResult
proc semSym(c: PContext, n: PNode, s: PSym, flags: TExprFlags): PNode =
case s.kind
of skProc, skMethod, skIterator, skConverter:
@@ -83,10 +87,16 @@ proc semSym(c: PContext, n: PNode, s: PSym, flags: TExprFlags): PNode =
result = newSymNode(s, n.info)
of skMacro: result = semMacroExpr(c, n, s)
of skTemplate: result = semTemplateExpr(c, n, s)
of skVar, skLet, skResult:
of skVar, skLet, skResult, skParam:
markUsed(n, s)
# if a proc accesses a global variable, it is not side effect free:
if sfGlobal in s.flags: incl(c.p.owner.flags, sfSideEffect)
if sfGlobal in s.flags:
incl(c.p.owner.flags, sfSideEffect)
elif s.owner != c.p.owner and s.owner.kind != skModule:
c.p.owner.typ.callConv = ccClosure
if illegalCapture(s) or c.p.next.owner != s.owner:
# Currently captures are restricted to a single level of nesting:
GlobalError(n.info, errIllegalCaptureX, s.name.s)
result = newSymNode(s, n.info)
of skGenericParam:
if s.ast == nil: InternalError(n.info, "no default for")