How Can I Retrieve a Struct Field Name Using Go Reflection?

Retrieving Struct Field Name Using Reflection

Problem Statement:

Consider the following Golang code:

type A struct {
    Foo string
}

func (a *A) PrintFoo() {
    fmt.Println("Foo value is " + a.Foo)
}

func main() {
    a := &A{Foo: "afoo"}
    val := reflect.Indirect(reflect.ValueOf(a))
    fmt.Println(val.Field(0).Type().Name())
}

In this example, the code prints "string", not "Foo". How can we retrieve the field name "Foo" using reflection in this context?

Answer:

To retrieve the field name, use the Type().Field(0).Name method on the reflect.Value. This method returns the name of the field's type, which in this case is "Foo". The following corrected code demonstrates this:

fmt.Println(val.Type().Field(0).Name()) // Prints "Foo"

Explanation:

The Indirect function dereferences the pointer a. The Type().Field(0) method retrieves the struct field information for the first field, and Name() extracts the field name. Note that there is no way to retrieve the field name for a reflect.Value directly, since this information is associated with the containing struct.

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