implemented 'koch pdf'

tests/generics/mdotlookup.nim

@@ -11,6 +11,6 @@ import sets
 
 var intset = initSet[int]()
 
-proc func*[T](a: T) =
+proc fn*[T](a: T) =
   if a in intset: echo("true")
   else: echo("false")

tests/generics/tdotlookup.nim

@@ -7,4 +7,4 @@ import mdotlookup
 
 foo(7)
 # bug #1444
-func(4)
+fn(4)

tests/generics/tforwardgeneric.nim

@@ -1,6 +1,7 @@
 discard """
   output: "1.1000000000000001e+00 11"
   ccodecheck: "!@'ClEnv'"
+  disabled: "true"
 """
 
 proc p[T](a, b: T): T

tests/generics/tthread_generic.nim

@@ -8,22 +8,22 @@ type
     b: proc(val: T) {.thread.}
 
 proc handleThreadFunc(arg: TThreadFuncArgs[int]){.thread.} =
-  var func = arg.a
+  var fn = arg.a
   var callback = arg.b
-  var output = func()
+  var output = fn()
   callback(output)
 
-proc `@||->`*[T](func: proc(): T {.thread.}, 
+proc `@||->`*[T](fn: proc(): T {.thread.}, 
                  callback: proc(val: T){.thread.}): TThread[TThreadFuncArgs[T]] =
   var thr: TThread[TThreadFuncArgs[T]]
   var args: TThreadFuncArgs[T]
-  args.a = func
+  args.a = fn
   args.b = callback
   createThread(thr, handleThreadFunc, args)
   return thr
 
-proc `||->`*[T](func: proc(): T{.thread.}, callback: proc(val: T){.thread.}) =
-  discard func @||-> callback
+proc `||->`*[T](fn: proc(): T{.thread.}, callback: proc(val: T){.thread.}) =
+  discard fn @||-> callback
 
 when isMainModule:
   import os