| // Copyright 2018 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package value |
| |
| import ( |
| "reflect" |
| |
| pref "github.com/golang/protobuf/v2/reflect/protoreflect" |
| ) |
| |
| func ListOf(p interface{}, c Converter) pref.List { |
| // TODO: Validate that p is a *[]T? |
| rv := reflect.ValueOf(p).Elem() |
| return listReflect{rv, c} |
| } |
| |
| type listReflect struct { |
| v reflect.Value // addressable []T |
| conv Converter |
| } |
| |
| func (ls listReflect) Len() int { |
| return ls.v.Len() |
| } |
| func (ls listReflect) Get(i int) pref.Value { |
| return ls.conv.PBValueOf(ls.v.Index(i)) |
| } |
| func (ls listReflect) Set(i int, v pref.Value) { |
| ls.v.Index(i).Set(ls.conv.GoValueOf(v)) |
| } |
| func (ls listReflect) Append(v pref.Value) { |
| ls.v.Set(reflect.Append(ls.v, ls.conv.GoValueOf(v))) |
| } |
| func (ls listReflect) Mutable(i int) pref.Mutable { |
| // Mutable is only valid for messages and panics for other kinds. |
| return ls.conv.PBValueOf(ls.v.Index(i)).Message() |
| } |
| func (ls listReflect) MutableAppend() pref.Mutable { |
| // MutableAppend is only valid for messages and panics for other kinds. |
| pv := pref.ValueOf(ls.conv.MessageType.New().ProtoReflect()) |
| ls.v.Set(reflect.Append(ls.v, ls.conv.GoValueOf(pv))) |
| return pv.Message() |
| } |
| func (ls listReflect) Truncate(i int) { |
| ls.v.Set(ls.v.Slice(0, i)) |
| } |
| func (ls listReflect) Unwrap() interface{} { |
| return ls.v.Addr().Interface() |
| } |
| func (ls listReflect) ProtoMutable() {} |
| |
| var ( |
| _ pref.List = listReflect{} |
| _ Unwrapper = listReflect{} |
| ) |