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A concise way to define a concise tree. Only used for static tree, that means tree structure is frozed at compile time.
- A tree is constructed from a struct type, all need to do is define a struct. No struct value assignment is required, so you don't need to write every field name twice.
- All tree nodes are defined and referenced by struct fields. So node reference is ensured right at compile time.
- No intermediate "Children" fields. So tree definition and node reference are more concise.
concise_tree.Setup()set up path and tags of all tree nodes automatically. Path is generated by concating field names ofancestor nodes and self nodeby "." ; Tags is parsed from struct field's tag;- Convert a concise tree to a normal tree with
Childrenslice.
$ go get github.com/lovego/concise_tree
import (
"fmt"
tree "github.com/lovego/concise_tree"
)
type Modules struct {
*tree.Node
Bill *struct {
*tree.Node
List *tree.Node `name:"列表" desc:"单据列表"`
Detail *tree.Node `name:"详情" desc:"单据详情"`
} `name:"单据" desc:"各种单据"`
Goods *struct {
*tree.Node
Create *tree.Node `name:"创建" desc:"商品创建"`
Update *tree.Node `name:"更新" desc:"商品更新"`
Delete *tree.Node `name:"删除" desc:"商品删除"`
} `name:"商品" desc:"商品（含库存）"`
}
func ExampleSetup() {
modules := &Modules{}
tree.Setup(modules, "权限树", "", "根节点")
var n tree.ConciseTree
n = modules
fmt.Println(n.Name(), n.Code(), n.Desc())
n = modules.Bill
fmt.Println(n.Name(), n.Code(), n.Desc())
n = modules.Bill.List
fmt.Println(n.Name(), n.Code(), n.Desc())
n = modules.Bill.Detail
fmt.Println(n.Name(), n.Code(), n.Desc())
n = modules.Goods
fmt.Println(n.Name(), n.Code(), n.Desc())
n = modules.Goods.Create
fmt.Println(n.Name(), n.Code(), n.Desc())
n = modules.Goods.Update
fmt.Println(n.Name(), n.Code(), n.Desc())
n = modules.Goods.Delete
fmt.Println(n.Name(), n.Code(), n.Desc())
// Output:
// 权限树 根节点
// 单据 bill 各种单据
// 列表 bill.list 单据列表
// 详情 bill.detail 单据详情
// 商品 goods 商品（含库存）
// 创建 goods.create 商品创建
// 更新 goods.update 商品更新
// 删除 goods.delete 商品删除
}
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