tests/cases/compiler/primitiveMembers.ts(5,3): error TS2339: Property 'toBAZ' does not exist on type 'number'. tests/cases/compiler/primitiveMembers.ts(11,1): error TS2322: Type 'Number' is not assignable to type 'number'. tests/cases/compiler/primitiveMembers.ts(24,35): error TS1068: Unexpected token. A constructor, method, accessor, or property was expected. tests/cases/compiler/primitiveMembers.ts(25,56): error TS1068: Unexpected token. A constructor, method, accessor, or property was expected. ==== tests/cases/compiler/primitiveMembers.ts (4 errors) ==== var x = 5; var r = /yo/; r.source; x.toBAZ(); ~~~~~ !!! error TS2339: Property 'toBAZ' does not exist on type 'number'. x.toString(); var n = 0; var N: Number; n = N; // should not work, as 'number' has a different brand ~ !!! error TS2322: Type 'Number' is not assignable to type 'number'. N = n; // should work var o: Object = {} var f: Function = (x: string) => x.length; var r2: RegExp = /./g; var n2: Number = 34; var s: String = "yo"; var b: Boolean = true; var n3 = 5 || {}; class baz { public bar(): void { }; } ~ !!! error TS1068: Unexpected token. A constructor, method, accessor, or property was expected. class foo extends baz { public bar(){ return undefined}; } ~ !!! error TS1068: Unexpected token. A constructor, method, accessor, or property was expected.