fix: fixed schema alias template to really generate type aliases

Author: bit0rez

examples/ex_github/oas_json_gen.go

@@ -1,6 +1,7 @@
 {{- /*gotype: github.com/ogen-go/ogen/gen/ir.Type*/ -}}
 {{- define "json/encoders_alias" }}
 {{- $a := $.AliasTo }}
+{{- if ne $a.Kind "struct" }}
 // Encode encodes {{ $.Name }} as json.
 func (s {{ $.ReadOnlyReceiver }}) Encode(e *jx.Encoder) {
 	{{- if $a.DoPassByPointer }}
@@ -34,3 +35,4 @@ func (s *{{ $.Name }}) Decode(d *jx.Decoder) error {
 }
 
 {{ end }}
+{{ end }}

examples/ex_github/oas_schemas_gen.go

@@ -188,7 +188,7 @@ func (s *{{ if $op.WebhookInfo }}Webhook{{ end }}Server) decode{{ $op.Name }}Req
 	{
 		var unwrapped {{ $t.AliasTo.Go -}}
 		{{ template "decode_form_request" elem $t.AliasTo "unwrapped" }}
-    	{{ $v }} = {{ $t.Go }}(unwrapped)
+    	{{ $v }} = {{ $t.Go }}{unwrapped}
 	}
 {{- else if $t.IsGeneric }}
 	{

gen/_template/json/encoders_alias.tmpl

@@ -1,4 +1,10 @@
 {{- /*gotype: github.com/ogen-go/ogen/gen/ir.Type*/ -}}
 {{- define "schema/alias" }}
+{{- if eq $.AliasTo.Kind "struct" }}
+type {{ $.Name }} struct {
+  {{ $.AliasTo.Go }}
+}
+{{ else }}
 type {{ $.Name }} {{ $.AliasTo.Go }}
+{{- end }}
 {{ end }}

gen/_template/request_decode.tmpl

@@ -123,13 +123,17 @@ func TestRequests(t *testing.T) {
 	t.Run("AllRequestBodies", func(t *testing.T) {
 		reqs := []api.AllRequestBodiesReq{
 			&api.AllRequestBodiesApplicationJSON{
-				Name: testData,
+				SimpleObject: api.SimpleObject{
+					Name: testData,
+				},
 			},
 			&api.AllRequestBodiesReqApplicationOctetStream{
 				Data: strings.NewReader(testData),
 			},
 			&api.AllRequestBodiesApplicationXWwwFormUrlencoded{
-				Name: testData,
+				SimpleObject: api.SimpleObject{
+					Name: testData,
+				},
 			},
 			&api.SimpleObjectMultipart{
 				Name: testData,
@@ -152,13 +156,17 @@ func TestRequests(t *testing.T) {
 	t.Run("AllRequestBodiesOptional", func(t *testing.T) {
 		reqs := []api.AllRequestBodiesOptionalReq{
 			&api.AllRequestBodiesOptionalApplicationJSON{
-				Name: testData,
+				SimpleObject: api.SimpleObject{
+					Name: testData,
+				},
 			},
 			&api.AllRequestBodiesOptionalReqApplicationOctetStream{
 				Data: strings.NewReader(testData),
 			},
 			&api.AllRequestBodiesOptionalApplicationXWwwFormUrlencoded{
-				Name: testData,
+				SimpleObject: api.SimpleObject{
+					Name: testData,
+				},
 			},
 			&api.SimpleObjectMultipart{
 				Name: testData,