1 files changed, 166 insertions, 0 deletions
diff --git a/tests/generics/t4668.nim b/tests/generics/t4668.nim
new file mode 100644
index 000000000..bd44cc975
--- /dev/null
+++ b/tests/generics/t4668.nim
@@ -0,0 +1,166 @@
+discard """
+  output: '''
+foo1
+foo2
+'''
+"""
+
+block:
+  type
+    FooObj[T] = object
+      v: T
+    Foo1[T] = FooObj[T]
+    Foo2 = FooObj
+
+  proc foo1(x: Foo1) = echo "foo1"
+  proc foo2(x: Foo2) = echo "foo2"
+
+  var x: FooObj[float]
+  foo1(x)  # works
+  foo2(x)  # works
+
+block:
+  type
+    FooObj[T] = T
+    Foo1[T] = FooObj[T]
+    Foo2 = FooObj
+    Foo3 = Foo1
+    Foo4x = FooObj[SomeInteger]
+    Foo4 = FooObj[SomeFloat]
+    Foo5x = Foo1[SomeInteger]
+    Foo5 = Foo1[SomeFloat]
+
+  proc foo0(x: FooObj): int = 0
+  proc foo1(x: Foo1): int = 1
+  proc foo2(x: Foo2): int = 2
+  proc foo3(x: Foo3): int = 3
+  proc foo4(x: Foo4x): int = 40
+  proc foo4(x: Foo4): int = 4
+  proc foo5(x: Foo5x): int = 50
+  proc foo5(x: Foo5): int = 5
+
+  block:
+    var x: FooObj[float]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+
+  block:
+    var x: Foo1[float]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+
+  block:
+    var x: Foo2[float]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+
+block:
+  type
+    FooObj[T,U] = object
+      x: T
+      y: U
+    Foo1[U,T] = FooObj[T,U]
+    Foo2 = FooObj
+    Foo3 = Foo1
+    Foo4x = FooObj[SomeInteger,SomeInteger]
+    Foo4y = FooObj[SomeInteger,SomeFloat]
+    Foo4z = FooObj[SomeFloat,SomeFloat]
+    Foo4 = FooObj[SomeFloat,SomeInteger]
+    Foo5x = Foo1[SomeInteger,SomeInteger]
+    Foo5y = Foo1[SomeFloat,SomeInteger]
+    Foo5z = Foo1[SomeFloat,SomeFloat]
+    Foo5 = Foo1[SomeInteger,SomeFloat]
+
+  proc foo0(x: FooObj): int = 0
+  proc foo1(x: Foo1): int = 1
+  proc foo2(x: Foo2): int = 2
+  proc foo3(x: Foo3): int = 3
+  proc foo4(x: Foo4x): int = 40
+  proc foo4(x: Foo4y): int = 41
+  proc foo4(x: Foo4z): int = 42
+  proc foo4(x: Foo4): int = 4
+  proc foo5(x: Foo5x): int = 50
+  proc foo5(x: Foo5y): int = 51
+  proc foo5(x: Foo5z): int = 52
+  proc foo5(x: Foo5): int = 5
+
+  block:
+    var x: FooObj[float,int]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+
+  block:
+    var x: Foo1[int,float]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+
+block:
+  type
+    FooObj[T] = object of RootObj
+      v: T
+    FooObj2[T] = object of FooObj[T]
+    Foo1[T] = FooObj[T]
+    Foo2 = FooObj
+    Foo3 = Foo1
+    Foo4x = FooObj[SomeInteger]
+    Foo4 = FooObj[SomeFloat]
+    Foo5x = Foo1[SomeInteger]
+    Foo5 = Foo1[SomeFloat]
+
+  proc foo0(x: FooObj): int = 0
+  proc foo1(x: Foo1): int = 1
+  proc foo2(x: Foo2): int = 2
+  proc foo3(x: Foo3): int = 3
+  proc foo4(x: Foo4x): int = 40
+  proc foo4(x: Foo4): int = 4
+  proc foo5(x: Foo5x): int = 50
+  proc foo5(x: Foo5): int = 5
+
+  block:
+    var x: FooObj[float]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+
+  block:
+    var x: Foo1[float]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+
+  #[ XXX These still fail
+  block:
+    var x: FooObj2[float]
+    doAssert(foo0(x) == 0)
+    doAssert(foo1(x) == 1)
+    doAssert(foo2(x) == 2)
+    doAssert(foo3(x) == 3)
+    doAssert(foo4(x) == 4)
+    doAssert(foo5(x) == 5)
+  ]#