Trait tuple_list::TupleCons [−][src]
pub trait TupleCons<Head>: Tuple {
type ConsResult: Tuple;
fn cons(head: Head, tail: Self) -> Self::ConsResult;
}Expand description
Trait providing tuple construction function, allows to prepend a value to a tuple.
Associated Types
type ConsResult: Tuple
type ConsResult: Tuple
Tuple with Head prepended to Self
Required methods
fn cons(head: Head, tail: Self) -> Self::ConsResult
fn cons(head: Head, tail: Self) -> Self::ConsResult
Constructs a tuple from head value and tail tuple by prepending head to tail.
Reverse of NonEmptyTuple::uncons.
Examples
use tuple_list::TupleCons;
let a = TupleCons::cons("foo", ());
assert_eq!(
a,
("foo",),
);
let b = TupleCons::cons(false, a);
assert_eq!(
b,
(false, "foo"),
);
let c = TupleCons::cons(4, b);
assert_eq!(
c,
(4, false, "foo"),
);