| // Setting a breakpoint in a generator function works, and we can |
| // traverse the stack and evaluate expressions in the context of older |
| // generator frames. |
| |
| var g = newGlobal(); |
| var dbg = Debugger(g); |
| dbg.onDebuggerStatement = function (frame) { |
| function hit(frame) { |
| assertEq(frame.generator, true); |
| assertEq(frame.older.generator, true); |
| frame.older.eval("q += 16"); |
| } |
| |
| var s = frame.script; |
| var offs = s.getLineOffsets(g.line0 + 9); |
| for (var i = 0; i < offs.length; i++) |
| s.setBreakpoint(offs[i], {hit: hit}); |
| }; |
| |
| g.eval("line0 = Error().lineNumber;\n" + |
| "function* g(x) {\n" + // + 1 |
| " var q = 10;\n" + // + 2 |
| " yield* x;\n" + // + 3 |
| " return q;\n" + // + 4 |
| "}\n" + // + 5 |
| "function* range(n) {\n" + // + 6 |
| " debugger;\n" + // + 7 |
| " for (var i = 0; i < n; i++)\n" + // + 8 |
| " yield i;\n" + // + 9 <-- breakpoint |
| " return;\n" + // so that line 9 only has the yield |
| "}"); |
| |
| g.eval("var iter = g(range(2))"); |
| g.eval("var first = iter.next().value"); |
| g.eval("var second = iter.next().value"); |
| g.eval("var third = iter.next().value"); |
| |
| assertEq(g.first, 0); |
| assertEq(g.second, 1); |
| assertEq(g.third, 42); |