Go could have least have parametric functions (ex :
func Foo<T>(value T)T { /.../ }
bar := Foo<int>(3) //types are verified at compile time, no need for
reflection or interface {} on any runtime trick.
).
But talking about this is kind of useless until Go rids itself of its over
reliance on runtime features like reflection. I suspect Go reflection
capabilities are why the language stopped evolving significantly at first
place. String tags are another symptom of that "disease".
It's possible to write the snippet above with reflection today
(reflect.MakeFunc) , it shouldn't be.
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