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visitor.go
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visitor.go
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package astTool
import (
"go/ast"
)
/**
提供方法查看或者搜素ast节点
*/
type MyVisitor struct {
Result []ast.Node
Name string
Type string
}
func (v MyVisitor) Visit(node ast.Node) ast.Visitor {
if node == nil {
return v
}
return v
}
func (v *MyVisitor) Inspector(node ast.Node) bool {
switch x := node.(type) {
case *ast.FuncDecl:
if v.Name == x.Name.Name && v.Type == "FuncDecl" {
v.Result = append(v.Result, x)
return false
}
case *ast.ValueSpec:
for _, item := range x.Names {
if v.Name == item.Name && v.Type == "ValueSpec" {
v.Result = append(v.Result, x)
return false
}
}
case *ast.KeyValueExpr:
switch y := x.Key.(type) {
case *ast.Ident:
if v.Name == y.Name && v.Type == "KeyValueExpr" {
v.Result = append(v.Result, x)
return false
}
}
case *ast.Field:
for _, item := range x.Names {
if v.Name == item.Name && v.Type == "Field" {
v.Result = append(v.Result, x)
return false
}
}
case *ast.AssignStmt:
lhs := x.Lhs
for _, item := range lhs {
switch item.(type) {
case *ast.Ident:
idt := item.(*ast.Ident)
if v.Name == idt.Name && v.Type == "AssignStmt" {
v.Result = append(v.Result, x)
return false
}
}
}
case *ast.GenDecl:
switch x.Tok.String() {
case "type":
for _, item := range x.Specs {
switch y := item.(type) {
case *ast.TypeSpec:
if v.Name == y.Name.Name && v.Type == "GenDecl" {
v.Result = append(v.Result, x)
return false
}
default:
}
}
case "var":
for _, item := range x.Specs {
switch y := item.(type) {
case *ast.ValueSpec:
for _, it := range y.Names {
if v.Name == it.Name && v.Type == "GenDecl" {
v.Result = append(v.Result, x)
return false
}
}
default:
}
}
}
default:
}
return true
}
/**
搜索器
按照节点名,节点类型
*/
type Searcher struct {
Root ast.Node
}
/*
示例:
package miclient
func NewPartnerSvcEndpoints(service service.PartnerSvcService) int {
return 0
}
====>
func NewPartnerSvcEndpoints(service service.PartnerSvcService) int {
return 0
}
*/
func (v Searcher) FindFuncDecl(name string) *ast.FuncDecl {
visitor := MyVisitor{Result: make([]ast.Node, 0), Name: name, Type: "FuncDecl"}
ast.Inspect(v.Root, visitor.Inspector)
if len(visitor.Result) > 0 {
return visitor.Result[0].(*ast.FuncDecl)
} else {
return nil
}
}
func (v Searcher) FindValueSpec(name string) *ast.ValueSpec {
visitor := MyVisitor{Result: make([]ast.Node, 0), Name: name, Type: "ValueSpec"}
ast.Inspect(v.Root, visitor.Inspector)
if len(visitor.Result) > 0 {
return visitor.Result[0].(*ast.ValueSpec)
} else {
return nil
}
}
/*
示例:
package miclient
type s struct{
a int32
}
====>
type s struct{
a int32
}
*/
func (v Searcher) FindTypeDecl(name string) *ast.GenDecl {
visitor := MyVisitor{Result: make([]ast.Node, 0), Name: name, Type: "GenDecl"}
ast.Inspect(v.Root, visitor.Inspector)
if len(visitor.Result) > 0 {
return visitor.Result[0].(*ast.GenDecl)
} else {
return nil
}
}
/*
示例:
package miclient
type s struct{
a int32
}
=====>
a int32
*/
func (v Searcher) FindField(name string) *ast.Field {
visitor := MyVisitor{Result: make([]ast.Node, 0), Name: name, Type: "Field"}
ast.Inspect(v.Root, visitor.Inspector)
if len(visitor.Result) > 0 {
return visitor.Result[0].(*ast.Field)
} else {
return nil
}
}
/*
示例:
package miclient
type s struct{
a int32
}
func NewPartnerSvcEndpoints(service service.PartnerSvcService) PartnerSvcEndpoints {
return PartnerSvcEndpoints{
modelFetchEndpoint: MakemodelFetchEndpoint(service),
modelCreateEndpoint: MakemodelCreateEndpoint(service),
}
}
=====>
modelFetchEndpoint: MakemodelFetchEndpoint(service)
*/
func (v Searcher) FindKeyValExpr(name string) *ast.KeyValueExpr {
visitor := MyVisitor{Result: make([]ast.Node, 0), Name: name, Type: "KeyValueExpr"}
ast.Inspect(v.Root, visitor.Inspector)
if len(visitor.Result) > 0 {
return visitor.Result[0].(*ast.KeyValueExpr)
} else {
return nil
}
}
/*
示例:
package service
func NewGRPCEndpoint(client kitconsul.Client, guesssvcport int) (guessendpoint.GuessSvcEndpoints, *tlog.LogError) {
modelFetchFactory := createGuessSvcFactory(Modelendpoint.MakeModelFetchEndpoint, guesssvcport)
return endpoints, nil
}
=====>
modelFetchFactory := createGuessSvcFactory(Modelendpoint.MakeModelFetchEndpoint, guesssvcport)
*/
func (v Searcher) FindAssignStmt(name string) *ast.AssignStmt {
visitor := MyVisitor{Result: make([]ast.Node, 0), Name: name, Type: "AssignStmt"}
ast.Inspect(v.Root, visitor.Inspector)
if len(visitor.Result) > 0 {
return visitor.Result[0].(*ast.AssignStmt)
} else {
return nil
}
}