diff options
Diffstat (limited to 'tvix/eval/src/value/mod.rs')
| -rw-r--r-- | tvix/eval/src/value/mod.rs | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tvix/eval/src/value/mod.rs b/tvix/eval/src/value/mod.rs index f4a67eb8b9..c5565e6176 100644 --- a/tvix/eval/src/value/mod.rs +++ b/tvix/eval/src/value/mod.rs @@ -172,8 +172,11 @@ impl Display for Value { write!(f, "{}", format!("{:.5}", num).trim_end_matches(['.', '0'])) } + // Delegate thunk display to the type, as it must handle + // the case of already evaluated thunks. + Value::Thunk(t) => t.fmt(f), + // internal types - Value::Thunk(_) => f.write_str("internal[thunk]"), Value::AttrPath(path) => write!(f, "internal[attrpath({})]", path.len()), Value::AttrNotFound => f.write_str("internal[not found]"), Value::Blueprint(_) => f.write_str("internal[blueprint]"), @@ -203,6 +206,13 @@ impl PartialEq for Value { // Optimised attribute set comparison (Value::Attrs(a1), Value::Attrs(a2)) => Rc::ptr_eq(a1, a2) || { a1 == a2 }, + // If either value is a thunk, the inner value must be + // compared instead. The compiler should ensure that + // thunks under comparison have been forced, otherwise it + // is a bug. + (Value::Thunk(lhs), rhs) => &*lhs.value() == rhs, + (lhs, Value::Thunk(rhs)) => lhs == &*rhs.value(), + // Everything else is either incomparable (e.g. internal // types) or false. // TODO(tazjin): mirror Lambda equality behaviour |