生成一下java的mask或者index常量

mask.go

package main

import (
	"fmt"
	"strings"
)

type item struct {
	Name string
	Comment string
}


func createMasks(src []item) {
	//var index uint
	for index, item := range src {
		if index > 0 {
			fmt.Println()
		}
		if item.Comment != "" {
			fmt.Printf("/** %s */\n", item.Comment)
		}
		fmt.Printf("public static final int MASK_%s = %d;\n", strings.ToUpper(item.Name), 1<<uint(index))
		index++
	}
}

func createIndex(src []item, fromIndex int) {
	//var index uint
	for index, item := range src {
		if index > 0 {
			fmt.Println()
		}
		if item.Comment != "" {
			fmt.Printf("/** %s */\n", item.Comment)
		}
		fmt.Printf("public static final int INDEX_%s = %d;\n", strings.ToUpper(item.Name), index + fromIndex)
		index++
	}
}

func main() {
	m := make([]item, 0, 32)
	
	add := func (n, c string) {
		m = append(m, item{
			Name : n,
			Comment : c,
		})	
	}

	add("type_int", "int")
	add("type_long", "long")
	add("type_boolean", "boolean")
	add("type_float", "float")
	add("type_string", "string")
	add("type_string_set", "string_set")

	createMasks(m)
	
	fmt.Print("\n\n// ============ index ===========\n\n")
	
	createIndex(m, 1)
}