discard """
output: "Key: 12 value: 12Key: 13 value: 13 Key: A value: 12 Key: B value: 13"
"""
# test explicit type instantiation
type
TDict*[TKey, TValue] = object
data: seq[tuple[k: TKey, v: TValue]]
PDict*[TKey, #with `==`(a, b: TKey): bool
# hash(a: TKey): int,
TValue] = ref TDict[TKey, TValue]
proc newDict*[TKey, TValue](): PDict[TKey, TValue] =
new(result)
result.data = @[]
proc add*[TKey, TValue](d: PDict[TKey, TValue], k: TKey, v: TValue) =
d.data.add((k, v))
iterator items*[Tkey, TValue](d: PDict[TKey, TValue]): tuple[k: TKey,
v: TValue] =
for k, v in items(d.data): yield (k, v)
var d = newDict[int, string]()
d.add(12, "12")
d.add(13, "13")
for k, v in items(d):
stdout.write("Key: ", $k, " value: ", v)
var c = newDict[char, string]()
c.add('A', "12")
c.add('B', "13")
for k, v in items(c):
stdout.write(" Key: ", $k, " value: ", v)