made a nimble package

tests/test1.nim

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+import oop_macro
+  
+import strutils
+
+var 
+  output = ""
+
+class Animal of RootObj:
+  var
+    name: string
+    age: int
+
+  
+  method init*(name: string, age: int){.base.}=
+    self.name = name
+    self.age = age
+    output &= "I am a new Animal, " & self.name & "\n"
+  method stuff(s:string): string {.base.}= s
+  method vocalize: string {.base.}= "..."
+  method ageHumanYrs: int {.base.}= self.age # `self` is injected
+
+class Dog of Animal:
+  method vocalize: string = "woof"
+  method ageHumanYrs: int = self.age * 7
+
+class Cat of Animal:
+  method vocalize: string =
+    # call the base class method
+    self.vocalizeAnimal() & "meow"
+
+class Tiger of Cat:
+  method init(name: string="Bob", age: int)=
+    self.initAnimal(name, age)
+    output &= "I am a new tiger" & "\n"
+  method vocalize: string =
+    # no need for super.super!
+    self.vocalizeAnimal() & "Rawr!"
+
+var animals: seq[Animal] = @[]
+animals.add(new Dog(name: "Sparky", age: 10))
+animals.add(new Cat(name: "Mitten", age: 10))
+animals.add(new Tiger(name: "Jean", age: 2))
+
+
+for a in animals:
+  output &= a.name & " says " & a.vocalize()&"\n"
+  output &= $a.ageHumanYrs() & "\n"
+
+var check = """
+I am a new Animal, Sparky
+I am a new Animal, Mitten
+I am a new Animal, Jean
+I am a new tiger
+Sparky says woof
+70
+Mitten says ...meow
+10
+Jean says ...Rawr!
+2
+"""[0 .. ^1]
+echo "####"
+echo check
+echo "####"
+echo output
+echo "####"
+doAssert(output==check,"""echo matches""")  

tests/test1.nims

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+switch("path", "$projectDir/../src")