if tag != nil {
		for i := len(styp.FieldList) - len(styp.TagList); i > 0; i-- {
			styp.TagList = append(styp.TagList, nil)
		}
		styp.TagList = append(styp.TagList, tag)
	}

	f := new(Field)
	f.pos = pos
	f.Name = name
	f.Type = typ
	styp.FieldList = append(styp.FieldList, f)

	if debug && tag != nil && len(styp.FieldList) != len(styp.TagList) {

		r = c.Type(unqual(dtype.ReturnType), pos)
		gr = []*ast.Field{{Type: r.Go}}
	}
	return &FuncType{
		Params: p,
		Result: r,
		Go: &ast.FuncType{
			Params:  &ast.FieldList{List: gp},
			Results: &ast.FieldList{List: gr},
		},
	}
}

// Identifier
func (c *typeConv) Ident(s string) *ast.Ident {
	return ast.NewIdent(s)
}

// Opaque type of n bytes.