michael@0: // Check that we correctly throw SyntaxErrors for various syntactic near-misses.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: var mistakes = [
michael@0:     "((a)) => expr",
michael@0:     "a + b => a",
michael@0:     "'' + a => a",
michael@0:     "...x",
michael@0:     "[x] => x",
michael@0:     "([x] => x)",
michael@0:     "{p: p} => p",
michael@0:     "({p: p} => p)",
michael@0:     "{p} => p",
michael@0:     "(...x => expr)",
michael@0:     "1 || a => a",
michael@0:     "'use strict' => {}",
michael@0:     "package => {'use strict';}",    // tricky: FutureReservedWord in strict mode code only
michael@0:     "'use strict'; arguments => 0",  // names banned in strict mode code
michael@0:     "'use strict'; eval => 0",
michael@0:     "a => {'use strict'; with (a) return x; }",
michael@0:     "a => yield a",
michael@0:     "a => { yield a; }",
michael@0:     "a => { { let x; yield a; } }",
michael@0:     "(a = yield 0) => a",
michael@0:     "for (;;) a => { break; };",
michael@0:     "for (;;) a => { continue; };",
michael@0:     "...rest) =>",
michael@0:     "2 + ...rest) =>"
michael@0: ];
michael@0: 
michael@0: for (var s of mistakes)
michael@0:     assertThrowsInstanceOf(function () { Function(s); }, SyntaxError);
michael@0: 
michael@0: // Check that the tricky case is not an error in non-strict-mode code.
michael@0: var f = package => 0;
michael@0: assertEq(f(1), 0);
michael@0: