Bootstrap 3 full width inline form LESS mixin (hack using input group)

full-width-inline-form.less

.full-width {
	& .input-group-btn:last-child > .btn {
		margin-left: 5px;
		.border-left-radius(@border-radius-base);
	}
	& .form-control:first-child {
		.border-right-radius(@border-radius-base);
	}
}

/* Then to use it on any input group simply extend the entire class */

.search-form .input-group {
	&:extend(.full-width all);
}