Safari-bug.js

//// Safari parser bug
//// derived from: https://github.com/mishoo/UglifyJS2/issues/313

// fails with SyntaxError: Expected token ')'
( function(){ return this || eval('this'); }().x = "y" );

// fails with SyntaxError: Unexpected token '='
1, function(){ return this || eval('this'); }().x = "y";

//// weird that we get different error messages

//// The following all work.

// place the function call inside parens
( (function(){ return this || eval('this'); }()).x = "y" );
1, (function(){ return this || eval('this'); }()).x = "y";

// simplify the return expression, keep `then`
( function(){ return this; }().x = "y" );
1, function(){ return this; }().x = "y";

// keep `eval`
( function(){ return eval('this'); }().x = "y" );
1, function(){ return eval('this'); }().x = "y";

// place the return expression inside parens (!!)
( function(){ return ( this || eval('this') ); }().x = "y" );
1, function(){ return ( this || eval('this') ); }().x = "y";


//// I have the strange feeling that the *parser* in JSC tries to
//// inline the return value and parse the result instead, like some
//// sort of macro-expansion.  Huh?! */