michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(...rest=23) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f([a]=4) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a=4, [b]) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a=yield 24) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a={a : 19 + (yield 24).prop}) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a=1,a=1) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a,a=1) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a=1,a) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a,a,b=1) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a,b=1,a=1) {}");
michael@0: }, SyntaxError);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     eval("function f(a=1,b=1,a=1) {}");
michael@0: }, SyntaxError);
michael@0: function silly_but_okay(a=(function () { yield 97; })) {}