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ceph-csi/vendor/github.com/gogo/protobuf/plugin/enumstringer/enumstringer.go

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2018-12-19 14:29:25 +00:00
// Protocol Buffers for Go with Gadgets
//
// Copyright (c) 2013, The GoGo Authors. All rights reserved.
// http://github.com/gogo/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/*
The enumstringer (experimental) plugin generates a String method for each enum.
It is enabled by the following extensions:
- enum_stringer
- enum_stringer_all
This package is subject to change.
*/
package enumstringer
import (
"github.com/gogo/protobuf/gogoproto"
"github.com/gogo/protobuf/protoc-gen-gogo/generator"
)
type enumstringer struct {
*generator.Generator
generator.PluginImports
atleastOne bool
localName string
}
func NewEnumStringer() *enumstringer {
return &enumstringer{}
}
func (p *enumstringer) Name() string {
return "enumstringer"
}
func (p *enumstringer) Init(g *generator.Generator) {
p.Generator = g
}
func (p *enumstringer) Generate(file *generator.FileDescriptor) {
p.PluginImports = generator.NewPluginImports(p.Generator)
p.atleastOne = false
p.localName = generator.FileName(file)
strconvPkg := p.NewImport("strconv")
for _, enum := range file.Enums() {
if !gogoproto.IsEnumStringer(file.FileDescriptorProto, enum.EnumDescriptorProto) {
continue
}
if gogoproto.IsGoEnumStringer(file.FileDescriptorProto, enum.EnumDescriptorProto) {
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")
}
p.atleastOne = true
ccTypeName := generator.CamelCaseSlice(enum.TypeName())
p.P("func (x ", ccTypeName, ") String() string {")
p.In()
p.P(`s, ok := `, ccTypeName, `_name[int32(x)]`)
p.P(`if ok {`)
p.In()
p.P(`return s`)
p.Out()
p.P(`}`)
p.P(`return `, strconvPkg.Use(), `.Itoa(int(x))`)
p.Out()
p.P(`}`)
}
if !p.atleastOne {
return
}
}
func init() {
generator.RegisterPlugin(NewEnumStringer())
}