bugfix: compiler rejects methods without object parameter

rod/cgmeth.nim

@@ -17,9 +17,6 @@ proc methodCall*(n: PNode): PNode
 proc generateMethodDispatchers*(): PNode
 # implementation
 
-const 
-  skipPtrs = {tyVar, tyPtr, tyRef, tyGenericInst}
-
 proc genConv(n: PNode, d: PType, downcast: bool): PNode = 
   var 
     dest, source: PType

rod/msgs.nim

@@ -107,6 +107,7 @@ type
     errArrayExpectsTwoTypeParams, errInvalidVisibilityX, errInitHereNotAllowed, 
     errXCannotBeAssignedTo, errIteratorNotAllowed, errXNeedsReturnType, 
     errInvalidCommandX, errXOnlyAtModuleScope, 
+    errXNeedsParamObjectType,
     errTemplateInstantiationTooNested, errInstantiationFrom, 
     errInvalidIndexValueForTuple, errCommandExpectsFilename, errXExpected, 
     errInvalidSectionStart, errGridTableNotImplemented, errGeneralParseError, 
@@ -233,6 +234,7 @@ const
     "iterators can only be defined at the module\'s top level", 
     "$1 needs a return type", "invalid command: \'$1\'", 
     "\'$1\' is only allowed at top level", 
+    "'$1' needs a parameter that has an object type",
     "template/macro instantiation too nested", "instantiation from here", 
     "invalid index value for tuple subscript", 
     "command expects a filename argument", "\'$1\' expected", 

rod/semstmts.nim

@@ -755,6 +755,20 @@ proc semMethod(c: PContext, n: PNode): PNode =
   if not isTopLevel(c): liMessage(n.info, errXOnlyAtModuleScope, "method")
   result = semProcAux(c, n, skMethod, methodPragmas)
   
+  var s = result.sons[namePos].sym
+  var t = s.typ
+  var hasObjParam = false
+  
+  for col in countup(1, sonsLen(t)-1): 
+    if skipTypes(t.sons[col], skipPtrs).kind == tyObject: 
+      hasObjParam = true
+      break
+  
+  # XXX this not really correct way to do it: Perhaps it should be done after
+  # generic instantiation. Well it's good enough for now: 
+  if not hasObjParam:
+    liMessage(n.info, errXNeedsParamObjectType, "method")
+
 proc semConverterDef(c: PContext, n: PNode): PNode = 
   if not isTopLevel(c): liMessage(n.info, errXOnlyAtModuleScope, "converter")
   checkSonsLen(n, codePos + 1)

rod/types.nim

@@ -56,6 +56,8 @@ const
   abstractVarRange* = {tyGenericInst, tyRange, tyVar, tyDistinct, tyOrdinal}
   abstractInst* = {tyGenericInst, tyDistinct, tyOrdinal}
 
+  skipPtrs* = {tyVar, tyPtr, tyRef, tyGenericInst}
+
 proc skipTypes*(t: PType, kinds: TTypeKinds): PType
 proc elemType*(t: PType): PType
 proc containsObject*(t: PType): bool

tests/reject/spec.csv

@@ -14,6 +14,7 @@ tinout.nim;7;for a 'var' type a variable needs to be passed
 tinvalidnewseq.nim;10;type mismatch: got (array[0..6, string], int)
 tinvwhen.nim;6;invalid indentation
 titer4.nim;2;iterator within for loop context expected
+tmethod.nim;2;'method' needs a parameter that has an object type
 tnamspc.nim;5;undeclared identifier: 'global'
 tnoop.nim;6;expression 'a()' cannot be called
 tnot.nim;9;type mismatch
@@ -34,4 +35,5 @@ tstmtexp.nim;3;value returned by statement has to be discarded
 ttempl2.nim;13;undeclared identifier: 'b'
 ttypelessemptyset.nim;0;Error: internal error: invalid kind for last(tyEmpty)
 tunderscores.nim;3;invalid token: _
+twrongtupleaccess.nim;4;undeclared field: 'setBLAH'
 typredef.nim;2;illegal recursion in type 'Uint8'

tests/reject/tmethod.nim

@@ -0,0 +1,4 @@
+
+method m(i: int): int =
+  return 5
+

todo.txt

@@ -1,3 +1,7 @@
+- Tester needs to count failures
+- we need a way to disable tests
+
+
 High priority (version 0.9.0)
 =============================