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#![doc(html_root_url = "https://docs.rs/postgres_array/0.10")]
#[doc(inline)]
pub use crate::array::Array;
pub mod array;
mod impls;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Dimension {
pub len: i32,
pub lower_bound: i32,
}
impl Dimension {
fn shift(&self, idx: i32) -> i32 {
let offset = self.lower_bound;
assert!(idx >= offset, "out of bounds array access");
assert!(
offset >= 0 || idx <= 0 || i32::max_value() - (-offset) >= idx,
"out of bounds array access"
);
match idx.checked_sub(offset) {
Some(shifted) => shifted,
None => panic!("out of bounds array access"),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_from_vec() {
let a = Array::from_vec(vec![0i32, 1, 2], -1);
assert!(
&[Dimension {
len: 3,
lower_bound: -1,
},][..]
== a.dimensions()
);
assert_eq!(0, a[-1]);
assert_eq!(1, a[0]);
assert_eq!(2, a[1]);
}
#[test]
fn test_into_inner() {
let a = Array::from_vec(vec![0i32, 1, 2], -1);
let a = a.into_inner();
assert_eq!(a.len(), 3);
assert_eq!(0, a[0]);
assert_eq!(1, a[1]);
assert_eq!(2, a[2]);
}
#[test]
fn test_2d_slice_get() {
let mut a = Array::from_vec(vec![0i32, 1, 2], -1);
a.wrap(1);
assert_eq!(0, a[(1, -1)]);
assert_eq!(1, a[(1, 0)]);
assert_eq!(2, a[(1, 1)]);
}
#[test]
#[should_panic]
fn test_push_wrong_lower_bound() {
let mut a = Array::from_vec(vec![1i32], -1);
a.push(Array::from_vec(vec![2], 0));
}
#[test]
#[should_panic]
fn test_push_wrong_dims() {
let mut a = Array::from_vec(vec![1i32], -1);
a.wrap(1);
a.push(Array::from_vec(vec![1, 2], -1));
}
#[test]
#[should_panic]
fn test_push_wrong_dim_count() {
let mut a = Array::from_vec(vec![1i32], -1);
a.wrap(1);
let mut b = Array::from_vec(vec![2], -1);
b.wrap(1);
a.push(b);
}
#[test]
fn test_push_ok() {
let mut a = Array::from_vec(vec![1i32, 2], 0);
a.wrap(0);
a.push(Array::from_vec(vec![3, 4], 0));
assert_eq!(1, a[(0, 0)]);
assert_eq!(2, a[(0, 1)]);
assert_eq!(3, a[(1, 0)]);
assert_eq!(4, a[(1, 1)]);
}
#[test]
fn test_3d() {
let mut a = Array::from_vec(vec![0i32, 1], 0);
a.wrap(0);
a.push(Array::from_vec(vec![2, 3], 0));
a.wrap(0);
let mut b = Array::from_vec(vec![4, 5], 0);
b.wrap(0);
b.push(Array::from_vec(vec![6, 7], 0));
a.push(b);
assert_eq!(0, a[(0, 0, 0)]);
assert_eq!(1, a[(0, 0, 1)]);
assert_eq!(2, a[(0, 1, 0)]);
assert_eq!(3, a[(0, 1, 1)]);
assert_eq!(4, a[(1, 0, 0)]);
assert_eq!(5, a[(1, 0, 1)]);
assert_eq!(6, a[(1, 1, 0)]);
assert_eq!(7, a[(1, 1, 1)]);
}
#[test]
fn test_mut() {
let mut a = Array::from_vec(vec![1i32, 2], 0);
a.wrap(0);
a[(0, 0)] = 3;
assert_eq!(3, a[(0, 0)]);
}
#[test]
fn test_display() {
let a = Array::from_vec(vec![0i32, 1, 2, 3, 4], 1);
assert_eq!("{0,1,2,3,4}", &format!("{}", a));
let a = Array::from_vec(vec![0i32, 1, 2, 3, 4], -3);
assert_eq!("[-3:1]={0,1,2,3,4}", &format!("{}", a));
let mut a = Array::from_vec(vec![1i32, 2, 3], 3);
a.wrap(-2);
a.push(Array::from_vec(vec![4, 5, 6], 3));
a.wrap(1);
assert_eq!("[1:1][-2:-1][3:5]={{{1,2,3},{4,5,6}}}", &format!("{}", a));
let a: Array<String> = Array::from_parts(vec![], vec![]);
assert_eq!("{}", &format!("{}", a));
}
}