import (
    "fmt"
    "github.com/mcuadros/go-defaults"
)

type ExampleBasic struct {
    Foo bool   `default:"true"` //<-- StructTag with a default key
    Bar string `default:"33"`
    Qux int8
}

func NewExampleBasic() *ExampleBasic {
    example := new(ExampleBasic)
    defaults.SetDefaults(example) //<-- This set the defaults values

    return example
}

...

test := NewExampleBasic()
fmt.Println(test.Foo) //Prints: true
fmt.Println(test.Bar) //Prints: 33
fmt.Println(test.Qux) //Prints: