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main.go
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main.go
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package main
import (
"fmt"
"go/ast"
"go/parser"
"go/token"
"os"
"path/filepath"
"strings"
)
func main() {
dirname := "./"
if len(os.Args) > 1 {
dirname = os.Args[1]
}
fmt.Printf("指定されたディレクトリ: %s\n", dirname)
paths := []string{}
err := filepath.Walk(dirname, func(path string, info os.FileInfo, err error) error {
if err != nil {
fmt.Printf("prevent panic by handling failure accessing a path %q: %v\n", path, err)
return err
}
if !info.IsDir() && strings.HasSuffix(path, ".go") {
fmt.Println(path)
paths = append(paths, path)
}
return nil
})
if err != nil {
fmt.Printf("error walking the path %v: %v\n", dirname, err)
return
}
for _, path := range paths {
fmt.Printf("path: %s\n", path)
CheckEmbeddedPointerStructs(path)
}
}
func CheckEmbeddedPointerStructs(
filename string,
) {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, filename, nil, parser.ParseComments)
if err != nil {
fmt.Println(err)
return
}
ast.Inspect(f, func(n ast.Node) bool {
t, ok := n.(*ast.TypeSpec)
if !ok || t.Type == nil {
return true
}
s, ok := t.Type.(*ast.StructType)
if !ok {
return true
}
for _, field := range s.Fields.List {
if len(field.Names) == 0 { // embedded field
switch typ := field.Type.(type) {
case *ast.Ident:
fmt.Printf("struct %s has embedded struct %s\n", t.Name.Name, typ.Name)
case *ast.StarExpr: // pointer to something
if ident, ok := typ.X.(*ast.Ident); ok {
fmt.Printf("struct %s has embedded pointer to struct %s\n", t.Name.Name, ident.Name)
}
default:
fmt.Printf("unknown type %T\n", typ)
}
}
}
return true
})
}