go-1.18-GenericTypeAny.go

// Results is a array of results, the data types can be any
type Results[T any] []T

// Subtractable is a type constraint that defines subtractable datatypes to be used in generic functions
type Subtractable interface {
	int | int32 | int64 | float32 | float64 | uint | uint32 | uint64
}

func main(){
	var a int = 20
	var b int = 10

	result := Subtract(a, b)

	var c float32 = 20.5
	var d float32 = 10.3

	result2 := Subtract[float32](c, d)
	result3 := Subtract(c, d)
	
	fmt.Println("Result: ", result)
	fmt.Println("Result2: ", result2)
	fmt.Println("Result3: ", result3)
	// Create a generic Results type, and set the instantitation to int
	var resultStorage Results[any]
	// We can now append all values
	resultStorage = append(resultStorage, result, result2, result3)

	fmt.Println("ResultStorage: ", resultStorage)
}