fix bug: release empty struct limit (#96)

tools/goctl/rpc/gen/gencall.go

@@ -57,24 +57,24 @@ var errJsonConvert = errors.New("json convert error")
 {{.types}}
 `
 	callInterfaceFunctionTemplate = `{{if .hasComment}}{{.comment}}
-{{end}}{{.method}}(ctx context.Context,in *{{.pbRequest}}) {{if .hasResponse}}(*{{.pbResponse}},{{end}} error{{if .hasResponse}}){{end}}`
+{{end}}{{.method}}(ctx context.Context,in *{{.pbRequest}}) (*{{.pbResponse}},error)`
 	callFunctionTemplate = `
 {{if .hasComment}}{{.comment}}{{end}}
-func (m *default{{.rpcServiceName}}) {{.method}}(ctx context.Context,in *{{.pbRequest}}) {{if .hasResponse}}(*{{.pbResponse}},{{end}} error{{if .hasResponse}}){{end}} {
+func (m *default{{.rpcServiceName}}) {{.method}}(ctx context.Context,in *{{.pbRequest}}) (*{{.pbResponse}}, error) {
 	var request {{.package}}.{{.pbRequest}}
 	bts, err := jsonx.Marshal(in)
 	if err != nil {
-		return {{if .hasResponse}}nil, {{end}}errJsonConvert
+		return nil, errJsonConvert
 	}
 
 	err = jsonx.Unmarshal(bts, &request)
 	if err != nil {
-		return {{if .hasResponse}}nil, {{end}}errJsonConvert
+		return nil, errJsonConvert
 	}
 
 	client := {{.package}}.New{{.rpcServiceName}}Client(m.cli.Conn())
-	{{if .hasResponse}}resp, err := {{else}}_, err = {{end}}client.{{.method}}(ctx, &request)
-	{{if .hasResponse}}if err != nil{
+	resp, err :=  client.{{.method}}(ctx, &request)
+	if err != nil{
 		return nil, err
 	}
 
@@ -89,11 +89,7 @@ func (m *default{{.rpcServiceName}}) {{.method}}(ctx context.Context,in *{{.pbRe
 		return nil, errJsonConvert
 	}
 
-	return &ret, nil{{else}}if err != nil {
-		return err
-	}
-
-	return nil{{end}}
+	return &ret, nil
 }
 `
 )
@@ -177,10 +173,6 @@ func (g *defaultRpcGenerator) getFuncs(service *parser.RpcService) ([]string, er
 	pkgName := file.Package
 	functions := make([]string, 0)
 	for _, method := range service.Funcs {
-		data, found := file.Strcuts[strings.ToLower(method.OutType)]
-		if found {
-			found = len(data.Field) > 0
-		}
 		var comment string
 		if len(method.Document) > 0 {
 			comment = method.Document[0]
@@ -191,7 +183,6 @@ func (g *defaultRpcGenerator) getFuncs(service *parser.RpcService) ([]string, er
 			"package":        pkgName,
 			"pbRequest":      method.InType,
 			"pbResponse":     method.OutType,
-			"hasResponse":    found,
 			"hasComment":     len(method.Document) > 0,
 			"comment":        comment,
 		})
@@ -205,14 +196,9 @@ func (g *defaultRpcGenerator) getFuncs(service *parser.RpcService) ([]string, er
 }
 
 func (g *defaultRpcGenerator) getInterfaceFuncs(service *parser.RpcService) ([]string, error) {
-	file := g.ast
 	functions := make([]string, 0)
 
 	for _, method := range service.Funcs {
-		data, found := file.Strcuts[strings.ToLower(method.OutType)]
-		if found {
-			found = len(data.Field) > 0
-		}
 		var comment string
 		if len(method.Document) > 0 {
 			comment = method.Document[0]
@@ -224,7 +210,6 @@ func (g *defaultRpcGenerator) getInterfaceFuncs(service *parser.RpcService) ([]s
 				"method":     method.Name.Title(),
 				"pbRequest":  method.InType,
 				"pbResponse": method.OutType,
-				"hasResponse": found,
 			})
 		if err != nil {
 			return nil, err

tools/goctl/rpc/parser/pbast.go

@@ -445,9 +445,6 @@ func (a *PbAst) GenTypesCode() (string, error) {
 }
 
 func (s *Struct) genCode(containsTypeStatement bool) (string, error) {
-	if len(s.Field) == 0 {
-		return "", nil
-	}
 	fields := make([]string, 0)
 	for _, f := range s.Field {
 		var comment, doc string