id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc
357	Add ... (splat) operator to complement rest params and support new/apply composition	brendan		Define ... as a unary prefix operator, informally called "splat", at the same precedence level as !, ~, -, delete, typeof, void, etc.\r\n\r\nRequire that a splat expression be used only as the last or only actual parameter in a call or new expression.\r\n\r\nRequire the evaluated operand of splat to be an arguments or array object, else throw a TypeError.\r\n\r\nEvaluate splat once its operand has been evaluated by replacing the arguments or array object, call it A, with A.length actual trailing parameters from A[0] to A[A.length-1].\r\n\r\nIf the callee or constructor requires a different total number of arguments from the result after replacing A with its elements, throw a TypeError as for any argument count mismatch.\r\n\r\nPerform actual vs. formal type checking and conversion as usual, after replacing A with its elements and matching against trailing formals, including any optional ultimate ...rest parameter.\r\n\r\n/be	feature	new	major	Proposals	Harmony			graydon, jeffdyer, lth, chrispi, dherman, cormac, jaz, ptw, david-sarah@jacaranda.org