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// Test interactions between ES6 generators and not-yet-standard
// features.
function assertSyntaxError(str) {
var msg;
var evil = eval;
try {
// Non-direct eval.
evil(str);
} catch (exc) {
if (exc instanceof SyntaxError)
return;
msg = "Assertion failed: expected SyntaxError, got " + exc;
}
if (msg === undefined)
msg = "Assertion failed: expected SyntaxError, but no exception thrown";
throw new Error(msg + " - " + str);
}
// Destructuring binding.
assertSyntaxError("function* f(x = yield) {}");
assertSyntaxError("function* f(x = yield 17) {}");
assertSyntaxError("function* f([yield]) {}");
assertSyntaxError("function* f({ yield }) {}");
assertSyntaxError("function* f(...yield) {}");
// For each.
assertSyntaxError("for yield");
assertSyntaxError("for yield (;;) {}");
assertSyntaxError("for yield (x of y) {}");
assertSyntaxError("for yield (var i in o) {}");
// Expression bodies.
assertSyntaxError("function* f() yield 7");
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