Go Type conversions Implement a Unit System with Types
Example
This example illustrates how Go's type system can be used to implement some unit system.
package main
import (
"fmt"
)
type MetersPerSecond float64
type KilometersPerHour float64
func (mps MetersPerSecond) toKilometersPerHour() KilometersPerHour {
return KilometersPerHour(mps * 3.6)
}
func (kmh KilometersPerHour) toMetersPerSecond() MetersPerSecond {
return MetersPerSecond(kmh / 3.6)
}
func main() {
var mps MetersPerSecond
mps = 12.5
kmh := mps.toKilometersPerHour()
mps2 := kmh.toMetersPerSecond()
fmt.Printf("%vmps = %vkmh = %vmps\n", mps, kmh, mps2)
}
