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implemented generic templates

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This commit is contained in:
Araq 2012-08-27 01:59:14 +02:00
commit 6bcdb9c8f4
7 changed files with 47 additions and 26 deletions
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36
compiler/semtempl.nim
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@ -183,8 +183,9 @@ proc semTemplBody(c: var TemplCtx, n: PNode): PNode =
result = newSymNode(s, n.info)
elif Contains(c.toBind, s.id):
result = symChoice(c.c, n, s, scClosed)
elif s.owner == c.owner:
InternalAssert sfGenSym in s.flags
elif s.owner == c.owner and sfGenSym in s.flags:
# template tmp[T](x: var seq[T]) =
# var yz: T
incl(s.flags, sfUsed)
result = newSymNode(s, n.info)
of nkBind:
@ -364,21 +365,32 @@ proc semTemplateDef(c: PContext, n: PNode): PNode =
n.sons[namePos] = newSymNode(s, n.sons[namePos].info)
if n.sons[pragmasPos].kind != nkEmpty:
pragma(c, s, n.sons[pragmasPos], templatePragmas)
# check that no generic parameters exist:
var gp: PNode
if n.sons[genericParamsPos].kind != nkEmpty:
LocalError(n.info, errNoGenericParamsAllowedForX, "template")
if n.sons[paramsPos].kind == nkEmpty:
# use ``stmt`` as implicit result type
s.typ = newTypeS(tyProc, c)
s.typ.n = newNodeI(nkFormalParams, n.info)
rawAddSon(s.typ, newTypeS(tyStmt, c))
addSon(s.typ.n, newNodeIT(nkType, n.info, s.typ.sons[0]))
n.sons[genericParamsPos] = semGenericParamList(c, n.sons[genericParamsPos])
gp = n.sons[genericParamsPos]
else:
semParamList(c, n.sons[ParamsPos], nil, s)
if n.sons[paramsPos].sons[0].kind == nkEmpty:
gp = newNodeI(nkGenericParams, n.info)
# process parameters:
if n.sons[paramsPos].kind != nkEmpty:
semParamList(c, n.sons[ParamsPos], gp, s)
if sonsLen(gp) > 0:
if n.sons[genericParamsPos].kind == nkEmpty:
# we have a list of implicit type parameters:
n.sons[genericParamsPos] = gp
# no explicit return type? -> use tyStmt
if n.sons[paramsPos].sons[0].kind == nkEmpty:
# use ``stmt`` as implicit result type
s.typ.sons[0] = newTypeS(tyStmt, c)
s.typ.n.sons[0] = newNodeIT(nkType, n.info, s.typ.sons[0])
else:
s.typ = newTypeS(tyProc, c)
# XXX why do we need tyStmt as a return type again?
s.typ.n = newNodeI(nkFormalParams, n.info)
rawAddSon(s.typ, newTypeS(tyStmt, c))
addSon(s.typ.n, newNodeIT(nkType, n.info, s.typ.sons[0]))
var ctx: TemplCtx
ctx.toBind = initIntSet()
ctx.c = c