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//! This module implements Nix lists.
use std::fmt::Display;
use super::Value;
#[repr(transparent)]
#[derive(Clone, Debug, PartialEq)]
pub struct NixList(Vec<Value>);
impl Display for NixList {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str("[ ")?;
for v in &self.0 {
v.fmt(f)?;
f.write_str(" ")?;
}
f.write_str("]")
}
}
impl NixList {
pub fn concat(&self, other: &Self) -> Self {
let mut lhs = self.clone();
let mut rhs = other.clone();
lhs.0.append(&mut rhs.0);
lhs
}
pub fn len(&self) -> usize {
self.0.len()
}
pub fn get(&self, i: usize) -> Option<&Value> {
self.0.get(i)
}
pub fn construct(count: usize, stack_slice: Vec<Value>) -> Self {
debug_assert!(
count == stack_slice.len(),
"NixList::construct called with count == {}, but slice.len() == {}",
count,
stack_slice.len(),
);
NixList(stack_slice)
}
pub fn iter(&self) -> std::slice::Iter<Value> {
self.0.iter()
}
pub fn into_iter(self) -> std::vec::IntoIter<Value> {
self.0.into_iter()
}
}
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