Generic struct composition

generic_struct_composition.go

package main
import "fmt"
import "encoding/json"
import "bytes"

type AuthPost [T any] struct {
    UserID string `json:"userid"`
    SID    string `json:"sid"`
    Data   T      `json:"data"`
}

type PostBlog struct {
    Title    string `json:"title"`
    Subtitle string `json:"subtitle"`
    Body     string `json:"body"`
}

func main() {
  fmt.Println("Hello World!")
  
  body := "Nature's first green is gold,\n" + 
          "Her hardest hue to hold.\n" +
          "Her early leaf's a flower;\n" +
          "But only so an hour.\n" +
          "Then leaf subsides to leaf.\n" +
          "So Eden sank to grief,\n" +
          "So dawn goes down to day.\n" +
          "Nothing gold can stay."
  
  msg := AuthPost[PostBlog] {
      UserID: "micrified",
      SID:    "a783-8kx8-229p-1kd8",
      Data:   PostBlog {
          Title: "Nothing Gold Can Stay",
          Subtitle: "By Robert Frost",
          Body: body,
      },
  }
  
  // Encode
  buffer := bytes.Buffer{}
  json.NewEncoder(&buffer).Encode(msg)
  fmt.Println(buffer)
  
}