Primitive Type tuple
Operations on tuples
To access a single element of a tuple one can use the following methods:
valN- returns a value of N-th elementrefN- returns a reference to N-th elementmutN- returns a mutable reference to N-th element
Indexing starts from zero, so val0 returns first value, val1
returns second value, and so on. In general, a tuple with S
elements provides aforementioned methods suffixed with numbers
from 0 to S-1. Traits which contain these methods are
implemented for tuples with up to 12 elements.
If every type inside a tuple implements one of the following traits, then a tuple itself also implements it.
ClonePartialEqEqPartialOrdOrdDefault
Examples
Using methods:
fn main() { let pair = ("pi", 3.14f64); assert_eq!(pair.val0(), "pi"); assert_eq!(pair.val1(), 3.14f64); }let pair = ("pi", 3.14f64); assert_eq!(pair.val0(), "pi"); assert_eq!(pair.val1(), 3.14f64);
Using traits implemented for tuples:
fn main() { use std::default::Default; let a = (1i, 2i); let b = (3i, 4i); assert!(a != b); let c = b.clone(); assert!(b == c); let d : (u32, f32) = Default::default(); assert_eq!(d, (0u32, 0.0f32)); }use std::default::Default; let a = (1i, 2i); let b = (3i, 4i); assert!(a != b); let c = b.clone(); assert!(b == c); let d : (u32, f32) = Default::default(); assert_eq!(d, (0u32, 0.0f32));