Utility library to work with tuples.
Features:
-
Test if all elements are
Ok
:all_ok()
assert_eq!( all_ok((good(1), good(2), good(3))), Ok((1, 2, 3)), ); assert_eq!( all_ok((good(1), bad(2), good(3))), Err((Ok(1), Err(2), Ok(3))) );
-
Test if all elements are
Some
:all_some()
assert_eq!( all_some((Some(1), Some(2), Some(3))), Ok((1, 2, 3)) ); assert_eq!( all_some((Some(1), Option::<()>::None, Some(3))), Err((Some(1), None, Some(3))) );
-
Prepend an element to a tuple:
prepend()
assert_eq!( prepend(1, (2, 3, 4)), (1, 2, 3, 4) );
-
Append an element to a tuple:
append()
assert_eq!( append((1, 2, 3), 4), (1, 2, 3, 4) );
-
Concatenate two tuples:
concat_tuples()
assert_eq!( concat_tuples((1, 2), (3, 4, 5)), (1, 2, 3, 4, 5) );
-
Concatenate multiple tuples:
concat_many()
assert_eq!( concat_many(((), (1,), (2, 3,), (4, 5, 6))), (1, 2, 3, 4, 5, 6) );
-
Turn a reference to a tuple to a tuple of references:
ref_tuple()
assert_eq!( ref_tuple(&(1, 2, 3)), (&1, &2, &3) );
-
Turn a reference to a mutable tuple to a tuple of mutable references:
tuple_ref_mut()
assert_eq!( tuple_ref_mut(&mut (1, 2, 3)), (&mut 1, &mut 2, &mut 3) );
-
Extract the first element of a tuple:
unprepend()
assert_eq!( unprepend((1, 2, 3, 4)), (1, (2, 3, 4)) );
-
Extract the last element of a tuple:
unappend()
assert_eq!( unappend((1, 2, 3, 4)), ((1, 2, 3), 4) );
-
Call a function with the tuple members as arguments:
apply()
fn add3(a: u32, b: u32, c: u32) -> u32 { a + b + c } let tpl3 = (1, 2, 3); assert_eq!( apply(&add3, tpl3), 6 );
-
Element-wise wrap the element of a tuple in
Option
:option_tuple()
assert_eq!( option_tuple(Some((1, 2, 3))), (Some(1), Some(2), Some(3)) );
-
Get the length of a tuple:
length()
assert_eq!(<(u8, u16, u32) as TupleLength>::LENGTH, 3);
-
Map a tuple:
map_tuple()
struct MyTupleEnum(usize); impl TupleMapper for MyTupleEnum { type MapElem
= ( usize, Type); fn map_elem ( & mut self, elem: Elem) -> Self::MapElem { let index = self. 0; self. 0 += 1; (index, elem) } } assert_eq!( map_tuple( MyTupleEnum( 1), ( "hello", "world", "!")), (( 1, "hello"), ( 2, "world"), ( 3, "!")), )
Supported tuple lengths:
By default the selected operations are implemented to tuples upto a length of 16 elements (features = ["default-len"]
).
You can specify a higher limit by using feature = ["X"]
, where X
can be 8, 16, 32, 64, 96, 128, 160, 192, 224, or 256. A higher number includes all lower numbers.