sudo

README

Sudo

sudo is a package to make reflect more powerful (and dangerous).

It exports a single function, Sudo, which when passed a reflect.Value, will return a new reflect.Value with the read-only restrictions removed.

Documentation

Index

• func Sudo(v reflect.Value) reflect.Value

Examples

• Sudo

Functions

func Sudo

func Sudo(v reflect.Value) reflect.Value

Sudo takes a reflect.Value where CanSet is false, and turns it into one where CanSet is true.

Example

package main

import (
	"fmt"
	"reflect"

	"github.com/zeebo/sudo"
)

func main() {
	var s struct{ x int }
	x := reflect.ValueOf(&s).Elem().FieldByName("x")

	// Because x went through an unexported field, we can't set it.
	fmt.Println(x.CanSet(), s.x)

	// But if we Sudo the reflect.Value
	x = sudo.Sudo(x)

	// then our wildest dreams will come true.
	x.SetInt(10)
	fmt.Println(x.CanSet(), s.x)

}

Output:
false 0
true 10