next steps to hygienic templates

compiler/ast.nim

@@ -259,7 +259,10 @@ const
   sfImmediate* = sfDeadCodeElim
     # macro or template is immediately expanded
     # without considering any possible overloads
-  
+
+  sfDirty* = sfPure
+    # template is not hygienic (old styled template)
+
   sfAnon* = sfDiscardable
     # symbol name that was generated by the compiler
     # the compiler will avoid printing such names 
@@ -691,7 +694,8 @@ const
 
 
 # creator procs:
-proc NewSym*(symKind: TSymKind, Name: PIdent, owner: PSym): PSym
+proc NewSym*(symKind: TSymKind, Name: PIdent, owner: PSym,
+             info: TLineInfo): PSym
 proc NewType*(kind: TTypeKind, owner: PSym): PType
 proc newNode*(kind: TNodeKind): PNode
 proc newIntNode*(kind: TNodeKind, intVal: BiggestInt): PNode
@@ -922,11 +926,10 @@ proc copyType(t: PType, owner: PSym, keepId: bool): PType =
   result.sym = t.sym          # backend-info should not be copied
   
 proc copySym(s: PSym, keepId: bool = false): PSym = 
-  result = newSym(s.kind, s.name, s.owner)
+  result = newSym(s.kind, s.name, s.owner, s.info)
   result.ast = nil            # BUGFIX; was: s.ast which made problems
-  result.info = s.info
   result.typ = s.typ
-  if keepId: 
+  if keepId:
     result.id = s.id
   else: 
     result.id = getID()
@@ -939,13 +942,14 @@ proc copySym(s: PSym, keepId: bool = false): PSym =
   result.loc = s.loc
   result.annex = s.annex      # BUGFIX
   
-proc NewSym(symKind: TSymKind, Name: PIdent, owner: PSym): PSym = 
+proc NewSym(symKind: TSymKind, Name: PIdent, owner: PSym,
+            info: TLineInfo): PSym = 
   # generates a symbol and initializes the hash field too
   new(result)
   result.Name = Name
   result.Kind = symKind
   result.flags = {}
-  result.info = UnknownLineInfo()
+  result.info = info
   result.options = gOptions
   result.owner = owner
   result.offset = - 1