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fixes #3498

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Previously it was not possible to use template arguments in template body as
the symbols were not resolved correctly leading to Error: undeclared
identifier: 'XX', eg.:

   template defaultOf[T](t: T): expr = (var d: T; d)
   echo defaultOf(1) #<- invalid identifier, but should output 0
This commit is contained in:
Adam Strzelecki 2015-10-30 00:27:33 +01:00
commit f838c1baa4
3 changed files with 20 additions and 13 deletions
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3
compiler/evaltempl.nim
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@ -38,7 +38,8 @@ proc evalTemplateAux(templ, actual: PNode, c: var TemplCtx, result: PNode) =
if s.owner.id == c.owner.id:
if s.kind == skParam and sfGenSym notin s.flags:
handleParam actual.sons[s.position]
elif s.kind == skGenericParam:
elif s.kind == skGenericParam or
s.kind == skType and s.typ != nil and s.typ.kind == tyGenericParam:
handleParam actual.sons[s.owner.typ.len + s.position - 1]
else:
internalAssert sfGenSym in s.flags

5
compiler/semtempl.nim
View file

@ -228,10 +228,7 @@ proc semTemplSymbol(c: PContext, n: PNode, s: PSym): PNode =
of skParam:
result = n
of skType:
if (s.typ != nil) and (s.typ.kind != tyGenericParam):
result = newSymNodeTypeDesc(s, n.info)
else:
result = n
result = newSymNodeTypeDesc(s, n.info)
else:
result = newSymNode(s, n.info)