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104 lines
3.1 KiB
104 lines
3.1 KiB
// Protocol Buffers for Go with Gadgets |
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// |
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// Copyright (c) 2013, The GoGo Authors. All rights reserved. |
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// http://github.com/gogo/protobuf |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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/* |
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The enumstringer (experimental) plugin generates a String method for each enum. |
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It is enabled by the following extensions: |
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- enum_stringer |
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- enum_stringer_all |
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This package is subject to change. |
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*/ |
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package enumstringer |
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import ( |
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"github.com/gogo/protobuf/gogoproto" |
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"github.com/gogo/protobuf/protoc-gen-gogo/generator" |
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) |
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type enumstringer struct { |
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*generator.Generator |
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generator.PluginImports |
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atleastOne bool |
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localName string |
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} |
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func NewEnumStringer() *enumstringer { |
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return &enumstringer{} |
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} |
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func (p *enumstringer) Name() string { |
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return "enumstringer" |
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} |
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func (p *enumstringer) Init(g *generator.Generator) { |
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p.Generator = g |
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} |
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func (p *enumstringer) Generate(file *generator.FileDescriptor) { |
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p.PluginImports = generator.NewPluginImports(p.Generator) |
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p.atleastOne = false |
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p.localName = generator.FileName(file) |
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strconvPkg := p.NewImport("strconv") |
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for _, enum := range file.Enums() { |
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if !gogoproto.IsEnumStringer(file.FileDescriptorProto, enum.EnumDescriptorProto) { |
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continue |
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} |
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if gogoproto.IsGoEnumStringer(file.FileDescriptorProto, enum.EnumDescriptorProto) { |
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panic("Go enum stringer conflicts with new enumstringer plugin: please use gogoproto.goproto_enum_stringer or gogoproto.goproto_enum_string_all and set it to false") |
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} |
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p.atleastOne = true |
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ccTypeName := generator.CamelCaseSlice(enum.TypeName()) |
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p.P("func (x ", ccTypeName, ") String() string {") |
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p.In() |
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p.P(`s, ok := `, ccTypeName, `_name[int32(x)]`) |
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p.P(`if ok {`) |
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p.In() |
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p.P(`return s`) |
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p.Out() |
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p.P(`}`) |
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p.P(`return `, strconvPkg.Use(), `.Itoa(int(x))`) |
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p.Out() |
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p.P(`}`) |
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} |
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if !p.atleastOne { |
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return |
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} |
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} |
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func init() { |
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generator.RegisterPlugin(NewEnumStringer()) |
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}
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