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discard """
nimout: "instantiated for string\ninstantiated for int\ninstantiated for bool"
output: "int\nseq[string]\nA\nB\n100\ntrue"
"""
import typetraits
proc plus(a, b: auto): auto = a + b
proc makePair(a, b: auto): auto = (first: a, second: b)
proc `+`(a, b: string): seq[string] = @[a, b]
var i = plus(10, 20)
var s = plus("A", "B")
var p = makePair("key", 100)
static: assert p[0].type is string
echo i.type.name
echo s.type.name
proc inst(a: auto): auto =
static: echo "instantiated for ", a.type.name
result = a
echo inst("A")
echo inst("B")
echo inst(100)
echo inst(true)
# XXX: [string, tyGenericParam] is cached instead of [string, string]
# echo inst[string, string]("C")
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