added experimental .this pragma

compiler/semdata.nim

@@ -30,6 +30,7 @@ type
                               # statements
     owner*: PSym              # the symbol this context belongs to
     resultSym*: PSym          # the result symbol (if we are in a proc)
+    selfSym*: PSym            # the 'self' symbol (if available)
     nestedLoopCounter*: int   # whether we are in a loop or not
     nestedBlockCounter*: int  # whether we are in a block or not
     inTryStmt*: int           # whether we are in a try statement; works also
@@ -103,7 +104,7 @@ type
     inParallelStmt*: int
     instTypeBoundOp*: proc (c: PContext; dc: PSym; t: PType; info: TLineInfo;
                             op: TTypeAttachedOp): PSym {.nimcall.}
-
+    selfName*: PIdent
 
 proc makeInstPair*(s: PSym, inst: PInstantiation): TInstantiationPair =
   result.genericSym = s
@@ -154,16 +155,6 @@ proc popOwner() =
 proc lastOptionEntry(c: PContext): POptionEntry =
   result = POptionEntry(c.optionStack.tail)
 
-proc pushProcCon*(c: PContext, owner: PSym) {.inline.} =
-  if owner == nil:
-    internalError("owner is nil")
-    return
-  var x: PProcCon
-  new(x)
-  x.owner = owner
-  x.next = c.p
-  c.p = x
-
 proc popProcCon*(c: PContext) {.inline.} = c.p = c.p.next
 
 proc newOptionEntry(): POptionEntry =