1 files changed, 42 insertions, 0 deletions
diff --git a/tests/concepts/tmanual.nim b/tests/concepts/tmanual.nim
new file mode 100644
index 000000000..c917f5022
--- /dev/null
+++ b/tests/concepts/tmanual.nim
@@ -0,0 +1,42 @@
+discard """
+  output: '''1
+2
+3
+4
+5
+6
+a
+b
+t
+e
+s
+t
+'''
+"""
+
+template accept(e) =
+  static: assert compiles(e)
+
+template reject(e) =
+  static: assert(not compiles(e))
+
+type
+  Container[T] = concept c
+    c.len is Ordinal
+    items(c) is T
+    for value in c:
+      type(value) is T
+
+proc takesIntContainer(c: Container[int]) =
+  for e in c: echo e
+
+takesIntContainer(@[1, 2, 3])
+reject takesIntContainer(@["x", "y"])
+
+proc takesContainer(c: Container) =
+  for e in c: echo e
+
+takesContainer(@[4, 5, 6])
+takesContainer(@["a", "b"])
+takesContainer "test"
+reject takesContainer(10)