Iterative Optimization on Hot Paths: Planning it out: Wrangling Go interfaces

descriptor.go

type Descriptor struct {
	Tags TagSet       // struct tags
	Type reflect.Type // the original type
	Kind reflect.Kind // the underlying kind
	Ptr  bool         // whether or not it's a ptr
}

sqlgen_example.go

// For a given column:
var valuer driver.Valuer = column.Descriptor.Valuer(reflect.ValueOf(""))
var scanner sql.Scanner  = column.Descriptor.Scanner()