Macro region_buffer::region_buffer
source · macro_rules! region_buffer {
($($element:expr),*) => { ... };
($element:expr; $len:expr) => { ... };
}
Expand description
Creates a RegionBuffer
containing the arguments.
region_buffer!
allows RegionBuffer
s to be defined with the same syntax
as array expressions. There are two forms of this macro:
- Create a
RegionBuffer
containing a given list of elements:
let buf = region_buffer![1, 2, 3];
assert_eq!(*buf.get(0), 1);
assert_eq!(*buf.get(1), 2);
assert_eq!(*buf.get(2), 3);
- Create a
RegionBuffer
given element and length:
let buf = region_buffer![1; 3];
assert_eq!(*buf.region(0, 3), [1, 1, 1]);
Note that unlike array expressions this syntax supports all elements which
implement 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
using this with types having a nonstandard Clone
implementation.
For example, region_buffer![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.