func main()

in gotypes/doc/main.go [16:60]
32 lines of code
8 McCabe index (conditional complexity)

func main() {
	if len(os.Args) != 3 {
		log.Fatal("Usage: doc <package> <object>")
	}
	//!+part1
	pkgpath, name := os.Args[1], os.Args[2]

	// The loader loads a complete Go program from source code.
	conf := loader.Config{ParserMode: parser.ParseComments}
	conf.Import(pkgpath)
	lprog, err := conf.Load()
	if err != nil {
		log.Fatal(err) // load error
	}

	// Find the package and package-level object.
	pkg := lprog.Package(pkgpath).Pkg
	obj := pkg.Scope().Lookup(name)
	if obj == nil {
		log.Fatalf("%s.%s not found", pkg.Path(), name)
	}
	//!-part1
	//!+part2

	// Print the object and its methods (incl. location of definition).
	fmt.Println(obj)
	for _, sel := range typeutil.IntuitiveMethodSet(obj.Type(), nil) {
		fmt.Printf("%s: %s\n", lprog.Fset.Position(sel.Obj().Pos()), sel)
	}

	// Find the path from the root of the AST to the object's position.
	// Walk up to the enclosing ast.Decl for the doc comment.
	_, path, _ := lprog.PathEnclosingInterval(obj.Pos(), obj.Pos())
	for _, n := range path {
		switch n := n.(type) {
		case *ast.GenDecl:
			fmt.Println("\n", n.Doc.Text())
			return
		case *ast.FuncDecl:
			fmt.Println("\n", n.Doc.Text())
			return
		}
	}
	//!-part2
}