How to Best Initialize a Bool Pointer in a Go Struct Literal?

How to Initialize a Bool Pointer in a Struct Literal

In Go, structs can have fields that are pointers to bool values. When creating a struct literal, you can specify the value of a bool pointer field by using the indirection operator (*). However, there are multiple ways to approach this.

Option 1: Using a Slice

One option is to create a slice with a single bool value of true and then take the address of its first element:

h := handler{is: &[]bool{true}[0]}

This method avoids defining a new variable but introduces additional boilerplate and overhead.

Option 2: Using a Helper Function

A cleaner solution is to define a helper function to create a *bool value with the desired value:

func newTrue() *bool {
    b := true
    return &b
}

h := handler{is: newTrue()}

Option 3: Using an Anonymous Function

You can also use an anonymous function to create a *bool value with the desired value in a single line:

h := handler{is: func() *bool { b := true; return &b }()}

Option 4: Using a Function with a Parameter

Alternatively, you can use a function that takes a boolean parameter and returns a *bool value:

h := handler{is: func(b bool) *bool { return &b }(true)}

The best option depends on the specific needs of your application. Consider factors such as code simplicity, efficiency, and readability.

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