我正在嘗試解析方法聲明?；旧衔倚枰@取接收器基本類型 ( type hello) 和返回類型 ( notypeand error)的語法節(jié)點。這個ast包看起來很簡單，但由于某種原因我沒有得到我需要的數(shù)據(jù)（即字段報告為零）。唯一有用的數(shù)據(jù)似乎只在Object -> Decl該類型的字段中提供，interface{} 所以我認(rèn)為我無法對其進(jìn)行序列化。任何幫助，將不勝感激。代碼如下：package mainimport ( "fmt" "go/ast" "go/parser" "go/token")func main() { // src is the input for which we want to inspect the AST. src := `package mypack// type hello is a cool typetype hello string// type notype is not that cooltype notype int// func printme is like nothing else.func (x *hello)printme(s string)(notype, error){ return 0, nil}` // Create the AST by parsing src. fset := token.NewFileSet() // positions are relative to fset f, err := parser.ParseFile(fset, "src.go", src, 0) if err != nil { panic(err) } // Inspect the AST and find our function var mf ast.FuncDecl ast.Inspect(f, func(n ast.Node) bool { switch x := n.(type) { case *ast.FuncDecl: mf = *x } return true }) if mf.Recv != nil { fmt.Printf("\n receivers:") for _, v := range mf.Recv.List { fmt.Printf(",tag %v", v.Tag) for _, xv := range v.Names { fmt.Printf("name %v, decl %v, data %v, type %v", xv.Name, xv.Obj.Decl, xv.Obj.Data, xv.Obj.Type) } } }}
1 回答
拉丁的傳說
TA貢獻(xiàn)1789條經(jīng)驗 獲得超8個贊
要獲得類型，您需要查看Type可能是 anast.StarExpr或 an的屬性ast.Ident。
在這里看看這個：
package main
import (
"fmt"
"go/ast"
"go/parser"
"go/token"
)
func main() {
// src is the input for which we want to inspect the AST.
src := `
package mypack
// type hello is a cool type
type hello string
// type notype is not that cool
type notype int
// printme is like nothing else.
func (x *hello)printme(s string)(notype, error){
return 0, nil
}
`
// Create the AST by parsing src.
fset := token.NewFileSet() // positions are relative to fset
f, err := parser.ParseFile(fset, "src.go", src, 0)
if err != nil {
panic(err)
}
// Inspect the AST and find our function
var mf ast.FuncDecl
ast.Inspect(f, func(n ast.Node) bool {
switch x := n.(type) {
case *ast.FuncDecl:
mf = *x
}
return true
})
if mf.Recv != nil {
for _, v := range mf.Recv.List {
fmt.Print("recv type : ")
switch xv := v.Type.(type) {
case *ast.StarExpr:
if si, ok := xv.X.(*ast.Ident); ok {
fmt.Println(si.Name)
}
case *ast.Ident:
fmt.Println(xv.Name)
}
}
}
}
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