[−][src]Macro ve::vec
Creates a Vec
containing the arguments.
vec!
allows Vec
s to be defined with the same syntax as array expressions.
There are two forms of this macro:
- Create a
Vec
containing a given list of elements:
let v = vec![1, 2, 3]; assert_eq!(v[0], 1); assert_eq!(v[1], 2); assert_eq!(v[2], 3);
- Create a
Vec
from a given element and size:
let v = vec![1; 3]; assert_eq!(v, [1, 1, 1]);
Note that unlike array expressions this syntax supports all elements which implements Clone
and the number of elements doesn't have to be a constant.
This will use clone
to duplicate an expression, so one should be careful when using this with
types having a nonstandard Clone
implementation. For example, vec!![Rc::new(1); 5]
will
create a vector of five references to the same boxed integer value, not five references
pointing to independently boxed integers.