Исходники и презентации

lessons/generics_and_reflection/reflect_generic/main.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"reflect"
+)
+
+func InvertSlice(args []reflect.Value) []reflect.Value {
+	inSlice, length := args[0], args[0].Len()
+	outSlice := reflect.MakeSlice(inSlice.Type(), 0, length)
+	for idx := length - 1; idx >= 0; idx-- {
+		element := inSlice.Index(idx)
+		outSlice = reflect.Append(outSlice, element)
+	}
+
+	return []reflect.Value{outSlice}
+}
+
+func Bind(value interface{}, fn func([]reflect.Value) []reflect.Value) {
+	invert := reflect.ValueOf(value).Elem()
+	invert.Set(reflect.MakeFunc(invert.Type(), fn))
+}
+
+func main() {
+	var invertInts func([]int) []int
+	Bind(&invertInts, InvertSlice)
+	fmt.Println(invertInts([]int{2, 3, 5}))
+
+	var invertStrs func([]string) []string
+	Bind(&invertStrs, InvertSlice)
+	fmt.Println(invertStrs([]string{"C++", "Go"}))
+}