go语言的初始化顺序,包,变量,init详解

package p1
import "fmt" //1.1
var x float32 = 1.2 //1.2
func init() { //1.3
  fmt.Printf("p1 package, x:%f\n", x) //1.4
}
func Donothing() {
  fmt.Println("do nothing.\n")
}

package main
import "fmt"
var WhatIsThe1 = AnswerToLife(2.1) //2.1
var WhatIsThe2 = AnswerToLife(2.2) //2.2
var WhatIsThe3 = AnswerToLife(2.3) //2.3
func init() { //3.1
  fmt.Printf("init WhatIsThe in a.go `s init 3.1: %d\n", 2)
}
func init() { //3.2
  fmt.Printf("init WhatIsThe in a.go`s init 3.2: %d\n", 3)
}

package main
import "p1" //1
import "fmt"
var WhatIsThe4 = AnswerToLife(2.4) //2.4
var WhatIsThe5 = AnswerToLife(2.5) //2.5
var WhatIsThe6 = AnswerToLife(2.6) //2.6
func AnswerToLife(index float32) float32 {
  fmt.Printf("init package level variable, WhatIsThe: %f\n", index)
  return index
}
func init() { //3.3
  fmt.Printf("init WhatIsThe in testinit.go`s init3.3: %d\n", 0)
}
func init() { //3.4
  fmt.Printf("init WhatIsThe in testinit.go`s init3.4: %d\n", 1)
}
func main() { //4
  p1.Donothing() //5
}

package main
import "fmt"
var WhatIsThe7 = AnswerToLife(2.7) //2.7
var WhatIsThe8 = AnswerToLife(2.8) //2.8
var WhatIsThe9 = AnswerToLife(2.9) //2.9
func init() { //3.5
  fmt.Printf("init WhatIsThe in z.go`s init 3.5: %d\n", 4)
}
func init() { //3.6
  fmt.Printf("init WhatIsThe in z.go`s init 3.6: %d\n", 5)
}

import(
 f "fmt"
)

import (//revel框架的代码片段
 "flag"
 "reflect"
 "github.com/revel/revel"
 controllers0 "github.com/revel/modules/static/app/controllers"
 _ "github.com/revel/modules/testrunner/app"
 controllers1 "github.com/revel/modules/testrunner/app/controllers"
 _ "guild_website/app"
 controllers "guild_website/app/controllers"
 tests "guild_website/tests"
 "github.com/revel/revel/testing"
)

import (//revel框架的代码片段
 _ "github.com/revel/modules/testrunner/app"
 _ "guild_website/app"
)