Can't you regex that given string contains just numbers and then use any of the provided methods? Then check if the returning value is a number to cater for edg

Can't you regex that given string contains just numbers and then use any of the provided methods? Then check if the returning value is a number to cater for edge cases Ok, having a method to do that for you would be nice, but the post reads like it's an issue that std library doesn't provide you with a method behaving as you exactly want