如何检索类型。对象。类型

我正在使用 golang.org/x/tools/go/packages 加载Go包并检查结构。我想知道 packages.Package 从中导入结构字段。

func load() (any, error) {
    pkg, err := loadPackage(".")
    if err != nil {
        return nil, err
    }

    st, err := loadStruct(pkg, "myStruct")
    if err != nil {
        return nil, err
    }

    for i := 0; i < st.NumFields(); i++ {
        field := st.Field(i)

        // Let's say this field is like `amount decimal.Decimal` how can I get
        // a reference to the decimal package as a packages.Package
        // FIXME
    }

    return nil, nil
}

func loadPackage(name string) (*packages.Package, error) {
    pkgs, err := packages.Load(
        &packages.Config{
            Mode: packages.NeedName | packages.NeedImports | packages.NeedDeps |
                packages.NeedTypes | packages.NeedTypesInfo | packages.NeedSyntax}, ".")
    if err != nil {
        log.WithError(err).Fatal("failed to load package")
    }
    if len(pkgs) != 1 {
        return nil, fmt.Errorf("expected 1 package, got %d", len(pkgs))
    }
    return pkgs[0], nil
}

func loadStruct(pkg *packages.Package, name string) (*types.Struct, error) {
    obj := pkg.Types.Scope().Lookup(name)
    if obj == nil {
        return nil, fmt.Errorf("could not find struct %s", name)
    }
    st, ok := obj.Type().Underlying().(*types.Struct)
    if !ok {
        return nil, fmt.Errorf("%s is not a struct", name)
    }
    return st, nil
}