Promoted Methods in Golang Structure (original) (raw)

Last Updated : 12 Jul, 2025

In Go structure, the working of promoted methods is just like**Promoted Fields. We use this concept in the nested structure where a structure is a field in another structure, simply by just adding the name of the structure into another structure and it behaves like the Anonymous Field to the nested structure. And the methods of that structure (other than nested structure) are the part of the nested structure, such type of methods are known as Promoted Methods. Or in other words, prompted methods are those methods which are implemented by the child structure, and is accessible by the parent structure.

**Important Points:

• If the child and the parent structure contain a method that has the same name but different type of receiver, then both the methods are available in the parent structure as shown in Example 2. Here both child and parent structure contain methods of the same names.
• If child structure contains two methods with the same name and same receiver, then these methods are not promoted in the parent structure and if you try to do, then the compiler will give an error.

**Example 1:

C `

// Golang program to illustrate the // concept of the promoted methods package main

import "fmt"

// Structure type details struct {

// Fields of the
// details structure
name    string
age     int
gender  string
psalary int

}

// Nested structure type employee struct { post string eid int details }

// Method func (d details) promotmethod(tsalary int) int { return d.psalary * tsalary }

func main() {

// Initializing the fields of
// the employee structure
values := employee{
    post: "HR",
    eid:  4567,
    details: details{

        name:    "Sumit",
        age:     28,
        gender:  "Male",
        psalary: 890,
    },
}

// Promoted fields of the 
// employee structure
fmt.Println("Name: ", values.name)
fmt.Println("Age: ", values.age)
fmt.Println("Gender: ", values.gender)
fmt.Println("Per day salary: ", values.psalary)

// Promoted method of the
// employee structure
fmt.Println("Total Salary: ", values.promotmethod(30))

// Normal fields of
// the employee structure
fmt.Println("Post: ", values.post)
fmt.Println("Employee id: ", values.eid)

}

`

**Output:

Name: Sumit Age: 28 Gender: Male Per day salary: 890 Total Salary: 26700 Post: HR Employee id: 4567

**Example 2:

C `

// Golang program to illustrate the // concept of the promoted methods package main

import "fmt"

// Structure type details struct {

// Fields of the
// details structure
name    string
age     int
gender  string
psalary int

}

// Method 1 func (e employee) promotmethod(tarticle int) int { return e.particle * tarticle }

// Nested structure type employee struct { post string particle int eid int details }

// Method 2 func (d details) promotmethod(tsalary int) int { return d.psalary * tsalary }

// Main method func main() {

// Initializing the fields of
// the employee structure
values := employee{
    post:     "HR",
    eid:      4567,
    particle: 5,
    details: details{

        name:    "Sumit",
        age:     28,
        gender:  "Male",
        psalary: 890,
    },
}

// Promoted fields of
// the employee structure
fmt.Println("Name: ", values.name)
fmt.Println("Age: ", values.age)
fmt.Println("Gender: ", values.gender)
fmt.Println("Per day salary: ", values.psalary)

// Promoted method of 
// the employee structure
fmt.Println("Total Salary: ", values.details.promotmethod(30))

// Normal fields of
// the employee structure
fmt.Println("Post: ", values.post)
fmt.Println("Employee id: ", values.eid)
fmt.Println("Total Articles: ", values.promotmethod(30))

}

`

**Output:

Name: Sumit Age: 28 Gender: Male Per day salary: 890 Total Salary: 150 Post: HR Employee id: 4567 Total Articles: 150