fix(codegen): fixed typings codegen, added a test

packages/core/src/base-client.ts

@@ -339,7 +339,7 @@ export class BaseTelegramClient extends EventEmitter {
             langCode: 'en',
             ...(opts.initConnectionOptions ?? {}),
             apiId,
-            query: null,
+            query: null as any,
         }
     }
 

packages/tl-utils/src/codegen/types.ts

@@ -99,7 +99,7 @@ export function generateTypescriptDefinitionsForTlEntry(
 
             genericsIndex[it.name] = 1
             if (idx !== 0) genericsString += ', '
-            genericsString += `${it.name} extends ${tsType}`
+            genericsString += `${it.name} extends ${tsType} = ${tsType}`
         })
         genericsString += '>'
     }

packages/tl-utils/tests/codegen/reader.spec.ts

@@ -73,6 +73,20 @@ describe('generateReaderCodeForTlEntry', () => {
         )
     })
 
+    it('generates code for constructors with arguments before flags field', () => {
+        test(
+            'poll#86e18161 id:long flags:# quiz:flags.3?true question:string = Poll;',
+            'var id=r.long(),',
+            'flags=r.uint();',
+            'return{',
+            "_:'poll',",
+            'id:id,',
+            'quiz:!!(flags&8),',
+            'question:r.string(),',
+            '}'
+        )
+    })
+
     it('generates code for constructors with multiple flags fields', () => {
         test(
             'updates.channelDifferenceEmpty#3e11affb flags:# final:flags.0?true pts:int timeout:flags.1?int flags2:# can_delete_channel:flags2.0?true = updates.ChannelDifference;',