feat(tvix/eval): add module for attribute set implementations

Change-Id: I6002bd5e5596b93325dea6c862370ba5235c0f08
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6086
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
This commit is contained in:
Vincent Ambo 2022-08-08 17:09:50 +03:00 committed by tazjin
parent d26c097d1b
commit ba03226e51
2 changed files with 37 additions and 0 deletions

View file

@ -0,0 +1,36 @@
/// This module implements Nix attribute sets. They have flexible
/// backing implementations, as they are used in very versatile
/// use-cases that are all exposed the same way in the language
/// surface.
use std::collections::BTreeMap;
use std::fmt::Display;
use super::string::NixString;
use super::Value;
#[derive(Debug)]
pub enum NixAttrs {
Map(BTreeMap<NixString, Value>),
KV { name: NixString, value: Value },
}
impl Display for NixAttrs {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str("{ ")?;
match self {
NixAttrs::KV { name, value } => {
f.write_fmt(format_args!("name = \"{}\"; ", name))?;
f.write_fmt(format_args!("value = {}; ", value))?;
}
NixAttrs::Map(map) => {
for (name, value) in map {
f.write_fmt(format_args!("{} = {}; ", name, value))?;
}
}
}
f.write_str("}")
}
}

View file

@ -4,6 +4,7 @@ use std::fmt::Display;
use crate::errors::{Error, EvalResult};
mod attrs;
mod string;
#[derive(Clone, Copy, Debug, PartialEq)]