AST cleanup; Definition generators scaffolding

tests/parser/class.ts

@@ -1,13 +1,27 @@
-export class Test<T> {
-  instanceFunction(): void {
-  }
-  static staticFunction(): void {
-  }
-  get instanceGetter(): i32 {
-    return 0;
-  }
-  static set staticSetter(v: i32) {
-  }
+export class Valid<T> {
+  constructor() {}
+  instanceFunction(): void {}
+  static staticFunction(): void {}
+  get instanceGetter(): i32 {}
+  static set staticSetter(v: i32) {}
   instanceField: i32;
   static staticField: i32;
 }
+export class Invalid<T> {
+
+  // 1092: Type parameters cannot appear on a constructor declaration
+  constructor<T>() {}
+
+  // 1110: Type expected.
+  instanceFunction() {}
+
+  // 1094: An accessor cannot have type parameters.
+  // 1054: A 'get' accessor cannot have parameters.
+  // 1110: Type expected.
+  get instanceGetter<T>(a: i32) {}
+
+  // 1094: An accessor cannot have type parameters.
+  // 1049: A 'set' accessor must have exactly one parameter.
+  // 1095: A 'set' accessor cannot have a return type annotation.
+  set instanceSetter<T>(): i32 {}
+}