tests/cases/compiler/generatorES6_6.ts(2,3): error TS9001: Generators are not currently supported. tests/cases/compiler/generatorES6_6.ts(3,13): error TS9000: 'yield' expressions are not currently supported. ==== tests/cases/compiler/generatorES6_6.ts (2 errors) ==== class C { *[Symbol.iterator]() { ~ !!! error TS9001: Generators are not currently supported. let a = yield 1; ~~~~~ !!! error TS9000: 'yield' expressions are not currently supported. } }