ptr

package main

import (
	"fmt"

	"github.com/gechr/x/ptr"
)

func main() {
	s := "hello"
	fmt.Println(ptr.Deref(&s))
}

Output:
hello

A nil pointer dereferences to the zero value instead of panicking.

package main

import (
	"fmt"

	"github.com/gechr/x/ptr"
)

func main() {
	var s *string
	var n *int
	fmt.Printf("%q\n", ptr.Deref(s))
	fmt.Println(ptr.Deref(n))
}

Output:
""
0

Deref is handy for optional struct fields modelled as pointers.

package main

import (
	"fmt"

	"github.com/gechr/x/ptr"
)

func main() {
	type Config struct {
		Retries *int
	}

	retries := 3
	fmt.Println(ptr.Deref(Config{Retries: &retries}.Retries))
	fmt.Println(ptr.Deref(Config{}.Retries))
}

Output:
3
0