git.delta.rocks / jrsonnet / refs/commits / b8427047424c

--- a/bindings/jrsonnet-web/src/lib.rs
+++ b/bindings/jrsonnet-web/src/lib.rs
@@ -65,6 +65,11 @@
 }
 
 fn unwrap_val_ref(value: &JsValue) -> Result<<WasmVal as RefFromWasmAbi>::Anchor, JsValue> {
+	#[allow(
+		clippy::cast_sign_loss,
+		clippy::cast_possible_truncation,
+		reason = "defined to be u32"
+	)]
 	let ptr = get(value, &JsValue::from_str("__wbg_ptr"))
 		.ok()
 		.and_then(|v| v.as_f64())
@@ -371,14 +376,14 @@
 impl WasmArrValue {
 	#[wasm_bindgen(getter)]
 	pub fn length(&self) -> u32 {
-		self.arr.len()
+		self.arr.len32()
 	}
 	pub fn at(&self, index: u32) -> Result<Option<WasmVal>, JsValue> {
 		let result = self.state.as_ref().map_or_else(
-			|| self.arr.get(index),
+			|| self.arr.get32(index),
 			|state| {
 				let _guard = state.try_enter();
-				self.arr.get(index)
+				self.arr.get32(index)
 			},
 		);
 		result

--- a/bindings/jsonnet/src/lib.rs
+++ b/bindings/jsonnet/src/lib.rs
@@ -66,14 +66,12 @@
 	#[cfg(target_family = "unix")]
 	{
 		use std::os::unix::ffi::OsStrExt;
-		let str = CString::new(input.as_os_str().as_bytes()).expect("input has zero byte in it");
-		str
+		CString::new(input.as_os_str().as_bytes()).expect("input has zero byte in it")
 	}
 	#[cfg(not(target_family = "unix"))]
 	{
 		let str = input.as_os_str().to_str().expect("bad utf-8");
-		let cstr = CString::new(str).expect("input has NUL inside");
-		cstr
+		CString::new(str).expect("input has NUL inside")
 	}
 }
 

--- a/cmds/jrb/src/main.rs
+++ b/cmds/jrb/src/main.rs
@@ -104,6 +104,7 @@
 	}
 }
 
+#[allow(clippy::too_many_lines)]
 fn main() {
 	tracing_subscriber::fmt().init();
 

--- a/crates/jrsonnet-evaluator/src/analyze.rs
+++ b/crates/jrsonnet-evaluator/src/analyze.rs
@@ -28,7 +28,10 @@
 use rustc_hash::FxHashMap;
 use smallvec::SmallVec;
 
-use crate::error::{format_found, suggest_names};
+use crate::{
+	arr::arridx,
+	error::{format_found, suggest_names},
+};
 
 #[derive(Debug, Clone, Copy)]
 #[must_use]
@@ -658,7 +661,7 @@
 	stack: &'s mut AnalysisStack,
 	bomb: DropBomb,
 }
-impl<'s> PendingBody<'s> {
+impl PendingBody<'_> {
 	/// After the body is processed, drop the frame's locals and emit any
 	/// "unused local" warnings.
 	fn finish(self) {
@@ -704,7 +707,7 @@
 			.drain(closures.first_in_frame.idx()..)
 			.collect();
 		for (i, def) in drained.iter().enumerate().rev() {
-			let id = LocalId(closures.first_in_frame.0 + i as u32);
+			let id = LocalId(closures.first_in_frame.0 + arridx(i));
 			let stack_locals = stack
 				.local_by_name
 				.get_mut(&def.name)
@@ -819,7 +822,7 @@
 			let (this_refs, rest) = refs.split_at(*refs_len);
 			refs = rest;
 			let start = next_id;
-			next_id += *dest_count as u32;
+			next_id += arridx(*dest_count);
 			Closure {
 				references: this_refs,
 				ids: start..next_id,
@@ -1043,7 +1046,7 @@
 	}
 
 	fn next_local_id(&self) -> LocalId {
-		LocalId(self.local_defs.len() as u32)
+		LocalId(arridx(self.local_defs.len()))
 	}
 
 	fn report_error(&mut self, msg: impl Into<String>, span: Option<Span>) {
@@ -1565,7 +1568,7 @@
 	let mut pending = alloc.finish();
 
 	let mut l_binds: Vec<LBind> = Vec::with_capacity(binds.len());
-	for (bind, destruct) in binds.iter().zip(destructs.into_iter()) {
+	for (bind, destruct) in binds.iter().zip(destructs) {
 		let mut value_taint = AnalysisResult::default();
 		let (value_shape, value) = pending
 			.stack
@@ -1608,7 +1611,7 @@
 	let mut pending = alloc.finish();
 
 	let mut l_params: Vec<LParam> = Vec::with_capacity(params.exprs.len());
-	for (p, destruct) in params.exprs.iter().zip(param_destructs.into_iter()) {
+	for (p, destruct) in params.exprs.iter().zip(param_destructs) {
 		let mut value_taint = AnalysisResult::default();
 		let default = p.default.as_ref().map_or_else(
 			|| None,

--- a/crates/jrsonnet-evaluator/src/arr/mod.rs
+++ b/crates/jrsonnet-evaluator/src/arr/mod.rs
@@ -2,6 +2,7 @@
 	any::Any,
 	fmt::{self},
 	num::NonZeroU32,
+	ops::{Bound, RangeBounds},
 	rc::Rc,
 };
 
@@ -104,20 +105,37 @@
 		Self::new(RangeArray::new_inclusive(a, b))
 	}
 
+	#[inline]
 	#[must_use]
-	pub fn slice(self, index: Option<i32>, end: Option<i32>, step: Option<NonZeroU32>) -> Self {
+	pub fn slice(self, range: impl RangeBounds<usize>) -> Self {
+		fn map_bound(start: bool, bound: Bound<&usize>) -> Option<i32> {
+			match bound {
+				Bound::Included(&v) => Some(i32::try_from(v).unwrap_or(i32::MAX)),
+				Bound::Excluded(&v) => Some(
+					i32::try_from(v)
+						.unwrap_or(i32::MAX)
+						.saturating_add(if start { 1 } else { -1 }),
+				),
+				Bound::Unbounded => None,
+			}
+		}
+		self.slice32(
+			map_bound(true, range.start_bound()),
+			map_bound(false, range.end_bound()),
+			None,
+		)
+	}
+
+	#[must_use]
+	pub fn slice32(self, index: Option<i32>, end: Option<i32>, step: Option<NonZeroU32>) -> Self {
 		let get_idx = |pos: Option<i32>, len: u32, default| match pos {
-			#[expect(
-				clippy::cast_sign_loss,
-				reason = "abs value is used, len is limited to u31"
-			)]
 			Some(v) if v < 0 => len.saturating_add_signed(v),
 			#[expect(clippy::cast_sign_loss, reason = "abs value is used")]
 			Some(v) => (v as u32).min(len),
 			None => default,
 		};
-		let index = get_idx(index, self.len(), 0);
-		let end = get_idx(end, self.len(), self.len());
+		let index = get_idx(index, self.len32(), 0);
+		let end = get_idx(end, self.len32(), self.len32());
 		let step = step.unwrap_or_else(|| NonZeroU32::new(1).expect("1 != 0"));
 
 		if index >= end {
@@ -126,24 +144,29 @@
 
 		Self::new(SliceArray {
 			inner: self,
-			#[expect(clippy::cast_possible_truncation, reason = "len is limited to u31")]
-			from: index as u32,
-			#[expect(clippy::cast_possible_truncation, reason = "len is limited to u31")]
-			to: end as u32,
+			from: index,
+			to: end,
 			step: step.get(),
 		})
 	}
 
 	/// Array length.
-	pub fn len(&self) -> u32 {
-		self.0.len()
+	#[inline]
+	pub fn len32(&self) -> u32 {
+		self.0.len32()
 	}
 
+	pub fn len(&self) -> usize {
+		self.len32() as usize
+	}
+
 	/// Is array contains no elements?
+	#[inline]
 	pub fn is_empty(&self) -> bool {
 		self.0.is_empty()
 	}
 
+	#[inline]
 	pub fn is_cheap(&self) -> bool {
 		self.0.is_cheap()
 	}
@@ -151,24 +174,37 @@
 	/// Get array element by index, evaluating it, if it is lazy.
 	///
 	/// Returns `None` on out-of-bounds condition.
-	pub fn get(&self, index: u32) -> Result<Option<Val>> {
-		self.0.get(index)
+	#[inline]
+	pub fn get32(&self, index: u32) -> Result<Option<Val>> {
+		self.0.get32(index)
+	}
+
+	pub fn get(&self, index: usize) -> Result<Option<Val>> {
+		let Ok(i) = u32::try_from(index) else {
+			return Ok(None);
+		};
+		self.get32(i)
 	}
 
 	/// Get array element by index, without evaluation.
 	///
 	/// Returns `None` on out-of-bounds condition.
-	pub fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
-		self.0.get_lazy(index)
+	#[inline]
+	pub fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
+		self.0.get_lazy32(index)
+	}
+
+	pub fn get_lazy(&self, index: usize) -> Option<Thunk<Val>> {
+		u32::try_from(index).ok().and_then(|i| self.get_lazy32(i))
 	}
 
 	pub fn iter(&self) -> impl ArrayLikeIter<Result<Val>> + '_ {
-		(0..self.len()).map(|i| self.get(i).transpose().expect("length checked"))
+		(0..self.len32()).map(|i| self.get32(i).transpose().expect("length checked"))
 	}
 
 	/// Iterate over elements, returning lazy values.
 	pub fn iter_lazy(&self) -> impl ArrayLikeIter<Thunk<Val>> + '_ {
-		(0..self.len()).map(|i| self.get_lazy(i).expect("length checked"))
+		(0..self.len32()).map(|i| self.get_lazy32(i).expect("length checked"))
 	}
 
 	/// Return a reversed view on current array.
@@ -201,3 +237,18 @@
 		Self::new(iter.into_iter().collect::<Vec<_>>())
 	}
 }
+
+/// Checks that the usize does not exceed 4g with debug assertions enabled
+/// Should only be used on values that can't reasonably exceed this value
+#[inline]
+pub(crate) fn arridx(i: usize) -> u32 {
+	#[allow(
+		clippy::cast_possible_truncation,
+		reason = "array indexes never exceed 4g"
+	)]
+	if cfg!(debug_assertions) {
+		u32::try_from(i).expect("4g hard limit")
+	} else {
+		i as u32
+	}
+}

--- a/crates/jrsonnet-evaluator/src/arr/spec.rs
+++ b/crates/jrsonnet-evaluator/src/arr/spec.rs
@@ -9,7 +9,7 @@
 use jrsonnet_gcmodule::{Cc, Trace};
 use jrsonnet_interner::{IBytes, IStr};
 
-use super::ArrValue;
+use super::{ArrValue, arridx};
 use crate::{
 	Context, Error, ObjValue, Result, Thunk, Val,
 	analyze::{ClosureShape, LExpr},
@@ -21,12 +21,12 @@
 };
 
 pub trait ArrayLike: Any + Trace + Debug {
-	fn len(&self) -> u32;
+	fn len32(&self) -> u32;
 	fn is_empty(&self) -> bool {
-		self.len() == 0
+		self.len32() == 0
 	}
-	fn get(&self, index: u32) -> Result<Option<Val>>;
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>>;
+	fn get32(&self, index: u32) -> Result<Option<Val>>;
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>>;
 
 	fn is_cheap(&self) -> bool {
 		false
@@ -40,15 +40,15 @@
 where
 	T: Any + Trace + Debug + ArrayCheap,
 {
-	fn len(&self) -> u32 {
+	fn len32(&self) -> u32 {
 		<T as ArrayCheap>::len(self)
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
 		Ok(<T as ArrayCheap>::get(self, index))
 	}
 
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		<T as ArrayCheap>::get(self, index).map(Thunk::evaluated)
 	}
 
@@ -80,16 +80,16 @@
 	}
 }
 impl ArrayLike for SliceArray {
-	fn len(&self) -> u32 {
+	fn len32(&self) -> u32 {
 		(self.to - self.from).div_ceil(self.step)
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
-		self.inner.get(self.map_idx(index))
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
+		self.inner.get32(self.map_idx(index))
 	}
 
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
-		self.inner.get_lazy(self.map_idx(index))
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
+		self.inner.get_lazy32(self.map_idx(index))
 	}
 
 	fn is_cheap(&self) -> bool {
@@ -99,7 +99,7 @@
 
 impl ArrayCheap for IBytes {
 	fn len(&self) -> u32 {
-		self.as_slice().len() as u32
+		arridx(self.as_slice().len())
 	}
 	fn get(&self, index: u32) -> Option<Val> {
 		self.as_slice()
@@ -132,11 +132,11 @@
 	}
 }
 impl ArrayLike for ExprArray {
-	fn len(&self) -> u32 {
-		self.cached.borrow().len() as u32
+	fn len32(&self) -> u32 {
+		arridx(self.cached.borrow().len())
 	}
-	fn get(&self, index: u32) -> Result<Option<Val>> {
-		if index >= self.len() {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
+		if index >= self.len32() {
 			return Ok(None);
 		}
 		match &self.cached.borrow()[index as usize] {
@@ -157,7 +157,7 @@
 		self.cached.borrow_mut()[index as usize] = ArrayThunk::Computed(new_value.clone());
 		Ok(Some(new_value))
 	}
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		#[derive(Trace)]
 		struct ExprArrThunk {
 			expr: ExprArray,
@@ -168,13 +168,13 @@
 
 			fn get(&self) -> Result<Self::Output> {
 				self.expr
-					.get(self.index)
+					.get32(self.index)
 					.transpose()
 					.expect("index checked")
 			}
 		}
 
-		if index >= self.len() {
+		if index >= self.len32() {
 			return None;
 		}
 		match &self.cached.borrow()[index as usize] {
@@ -202,8 +202,8 @@
 }
 impl ExtendedArray {
 	pub fn new(a: ArrValue, b: ArrValue) -> Option<Self> {
-		let a_len = a.len();
-		let b_len = b.len();
+		let a_len = a.len32();
+		let b_len = b.len32();
 		let len = a_len.checked_add(b_len)?;
 		Some(Self {
 			a,
@@ -251,22 +251,22 @@
 	}
 }
 impl ArrayLike for ExtendedArray {
-	fn get(&self, index: u32) -> Result<Option<Val>> {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
 		if self.split > index {
-			self.a.get(index)
+			self.a.get32(index)
 		} else {
-			self.b.get(index - self.split)
+			self.b.get32(index - self.split)
 		}
 	}
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		if self.split > index {
-			self.a.get_lazy(index)
+			self.a.get_lazy32(index)
 		} else {
-			self.b.get_lazy(index - self.split)
+			self.b.get_lazy32(index - self.split)
 		}
 	}
 
-	fn len(&self) -> u32 {
+	fn len32(&self) -> u32 {
 		self.len
 	}
 
@@ -280,18 +280,18 @@
 	T: IntoUntyped + Trace + fmt::Debug,
 	for<'a> &'a T: IntoUntyped,
 {
-	fn len(&self) -> u32 {
+	fn len32(&self) -> u32 {
 		self.as_slice().len().try_into().unwrap_or(u32::MAX)
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
 		let Some(elem) = self.as_slice().get(index as usize) else {
 			return Ok(None);
 		};
 		IntoUntyped::into_untyped(elem).map(Some)
 	}
 
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		let elem = self.as_slice().get(index as usize)?;
 		Some(IntoUntyped::into_lazy_untyped(elem))
 	}
@@ -343,16 +343,16 @@
 #[derive(Debug, Trace)]
 pub struct ReverseArray(pub ArrValue);
 impl ArrayLike for ReverseArray {
-	fn len(&self) -> u32 {
-		self.0.len()
+	fn len32(&self) -> u32 {
+		self.0.len32()
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
-		self.0.get(self.0.len() - index - 1)
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
+		self.0.get32(self.0.len32() - index - 1)
 	}
 
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
-		self.0.get_lazy(self.0.len() - index - 1)
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
+		self.0.get_lazy32(self.0.len32() - index - 1)
 	}
 
 	fn is_cheap(&self) -> bool {
@@ -374,7 +374,7 @@
 }
 impl MappedArray {
 	pub fn new(inner: ArrValue, mapper: ArrayMapper) -> Self {
-		let len = inner.len();
+		let len = inner.len32();
 		Self {
 			inner,
 			cached: Cc::new(RefCell::new(vec![ArrayThunk::Waiting; len as usize])),
@@ -389,12 +389,12 @@
 	}
 }
 impl ArrayLike for MappedArray {
-	fn len(&self) -> u32 {
-		self.cached.borrow().len() as u32
+	fn len32(&self) -> u32 {
+		arridx(self.cached.borrow().len())
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
-		if index >= self.len() {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
+		if index >= self.len32() {
 			return Ok(None);
 		}
 		match &self.cached.borrow()[index as usize] {
@@ -413,7 +413,7 @@
 
 		let val = self
 			.inner
-			.get(index)
+			.get32(index)
 			.transpose()
 			.expect("index checked")
 			.and_then(|r| self.evaluate(index, r));
@@ -428,7 +428,7 @@
 		self.cached.borrow_mut()[index as usize] = ArrayThunk::Computed(new_value.clone());
 		Ok(Some(new_value))
 	}
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		#[derive(Trace)]
 		struct MappedArrayThunk {
 			arr: MappedArray,
@@ -438,11 +438,14 @@
 			type Output = Val;
 
 			fn get(&self) -> Result<Self::Output> {
-				self.arr.get(self.index).transpose().expect("index checked")
+				self.arr
+					.get32(self.index)
+					.transpose()
+					.expect("index checked")
 			}
 		}
 
-		if index >= self.len() {
+		if index >= self.len32() {
 			return None;
 		}
 		match &self.cached.borrow()[index as usize] {
@@ -471,12 +474,12 @@
 	}
 }
 impl ArrayLike for MakeArray {
-	fn len(&self) -> u32 {
-		self.cached.borrow().len() as u32
+	fn len32(&self) -> u32 {
+		arridx(self.cached.borrow().len())
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
-		if index >= self.len() {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
+		if index >= self.len32() {
 			return Ok(None);
 		}
 		match &self.cached.borrow()[index as usize] {
@@ -493,7 +496,7 @@
 			unreachable!()
 		};
 
-		let val = self.mapper.call(index as u32);
+		let val = self.mapper.call(index);
 
 		let new_value = match val {
 			Ok(v) => v,
@@ -505,7 +508,7 @@
 		self.cached.borrow_mut()[index as usize] = ArrayThunk::Computed(new_value.clone());
 		Ok(Some(new_value))
 	}
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		#[derive(Trace)]
 		struct MakeArrayThunk {
 			arr: MakeArray,
@@ -515,11 +518,14 @@
 			type Output = Val;
 
 			fn get(&self) -> Result<Self::Output> {
-				self.arr.get(self.index).transpose().expect("index checked")
+				self.arr
+					.get32(self.index)
+					.transpose()
+					.expect("index checked")
 			}
 		}
 
-		if index >= self.len() {
+		if index >= self.len32() {
 			return None;
 		}
 		match &self.cached.borrow()[index as usize] {
@@ -543,7 +549,7 @@
 }
 impl RepeatedArray {
 	pub fn new(data: ArrValue, repeats: u32) -> Option<Self> {
-		let total_len = data.len().checked_mul(repeats)?;
+		let total_len = data.len32().checked_mul(repeats)?;
 		Some(Self {
 			data,
 			repeats,
@@ -554,25 +560,25 @@
 		if index > self.total_len {
 			return None;
 		}
-		Some(index % self.data.len())
+		Some(index % self.data.len32())
 	}
 }
 
 impl ArrayLike for RepeatedArray {
-	fn len(&self) -> u32 {
+	fn len32(&self) -> u32 {
 		self.total_len
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
 		let Some(idx) = self.map_idx(index) else {
 			return Ok(None);
 		};
-		self.data.get(idx)
+		self.data.get32(idx)
 	}
 
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		let idx = self.map_idx(index)?;
-		self.data.get_lazy(idx)
+		self.data.get_lazy32(idx)
 	}
 
 	fn is_cheap(&self) -> bool {
@@ -593,18 +599,18 @@
 }
 
 impl ArrayLike for PickObjectValues {
-	fn len(&self) -> u32 {
-		self.keys.len() as u32
+	fn len32(&self) -> u32 {
+		arridx(self.keys.len())
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
 		let Some(key) = self.keys.as_slice().get(index as usize) else {
 			return Ok(None);
 		};
 		Ok(Some(self.obj.get_or_bail(key.clone())?))
 	}
 
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		let key = self.keys.as_slice().get(index as usize)?;
 		Some(self.obj.get_lazy_or_bail(key.clone()))
 	}
@@ -633,11 +639,11 @@
 }
 
 impl ArrayLike for PickObjectKeyValues {
-	fn len(&self) -> u32 {
-		self.keys.len() as u32
+	fn len32(&self) -> u32 {
+		arridx(self.keys.len())
 	}
 
-	fn get(&self, index: u32) -> Result<Option<Val>> {
+	fn get32(&self, index: u32) -> Result<Option<Val>> {
 		let Some(key) = self.keys.as_slice().get(index as usize) else {
 			return Ok(None);
 		};
@@ -650,7 +656,7 @@
 		))
 	}
 
-	fn get_lazy(&self, index: u32) -> Option<Thunk<Val>> {
+	fn get_lazy32(&self, index: u32) -> Option<Thunk<Val>> {
 		let key = self.keys.as_slice().get(index as usize)?;
 		// Nothing can fail in the key part, yet value is still
 		// lazy-evaluated

--- a/crates/jrsonnet-evaluator/src/ctx.rs
+++ b/crates/jrsonnet-evaluator/src/ctx.rs
@@ -122,7 +122,7 @@
 	pub fn enter(self, sup_this: SupThis, build: impl FnOnce(&LocalsFrame, &Context)) -> Context {
 		let locals = LocalsFrame::new_once(self.n_locals);
 		let val = Context(Cc::new(ContextInternal {
-			captures: self.captures.clone(),
+			captures: self.captures,
 			locals,
 			sup_this: Some(sup_this),
 		}));

--- a/crates/jrsonnet-evaluator/src/evaluate/compspec.rs
+++ b/crates/jrsonnet-evaluator/src/evaluate/compspec.rs
@@ -97,7 +97,7 @@
 		let value_ctx = inner_ctx
 			.pack_captures_sup_this(self.frame_shape)
 			.enter(|fill, ctx| {
-				fill_letrec_binds(fill, &ctx, self.locals);
+				fill_letrec_binds(fill, ctx, self.locals);
 			});
 		evaluate_field_member_static(self.builder, inner_ctx, value_ctx, self.field)
 	}
@@ -336,6 +336,7 @@
 	Ok(())
 }
 
+#[allow(clippy::too_many_lines)]
 fn evaluate_compspecs(
 	ctx: Context,
 	specs: &[LCompSpec],
@@ -381,7 +382,7 @@
 			for (i, item) in arr.iter().enumerate() {
 				let item = item?;
 				let inner_ctx = ctx.pack_captures_sup_this(frame_shape).enter(|fill, ctx| {
-					destruct(dst, fill, Thunk::evaluated(item), &ctx);
+					destruct(dst, fill, Thunk::evaluated(item), ctx);
 				});
 				evaluate_compspecs(
 					inner_ctx,

--- a/crates/jrsonnet-evaluator/src/evaluate/destructure.rs
+++ b/crates/jrsonnet-evaluator/src/evaluate/destructure.rs
@@ -5,7 +5,7 @@
 use crate::{
 	Context, LocalsFrame, PackedContext, Result, SupThis, Thunk, Unbound, Val,
 	analyze::{
-		ClosureShape, LBind, LDestruct, LDestructField, LDestructRest, LExpr, LLocalExpr, LocalSlot,
+		ClosureShape, LBind, LDestruct, LDestructField, LDestructRest, LLocalExpr, LocalSlot,
 	},
 	bail,
 	evaluate::evaluate,
@@ -19,7 +19,7 @@
 
 	fill: &LocalsFrame,
 	value: Thunk<Val>,
-	a_ctx: &Context,
+	ctx: &Context,
 ) {
 	let min_len = start.len() + end.len();
 	let has_rest = rest.is_some();
@@ -29,14 +29,14 @@
 			bail!("expected array");
 		};
 		if !has_rest {
-			if arr.len() as usize != min_len {
-				bail!("expected {} elements, got {}", min_len, arr.len())
+			if arr.len() != min_len {
+				bail!("expected {} elements, got {}", min_len, arr.len32())
 			}
-		} else if (arr.len() as usize) < min_len {
+		} else if arr.len() < min_len {
 			bail!(
 				"expected at least {} elements, but array was only {}",
 				min_len,
-				arr.len()
+				arr.len32()
 			)
 		}
 		Ok(arr)
@@ -47,13 +47,13 @@
 		destruct(
 			d,
 			fill,
-			Thunk!(move || Ok(full.evaluate()?.get(i as u32)?.expect("length is checked"))),
-			a_ctx,
+			Thunk!(move || Ok(full.evaluate()?.get(i)?.expect("length is checked"))),
+			ctx,
 		);
 	}
 
-	let start_len = start.len() as u32;
-	let end_len = end.len() as u32;
+	let start_len = start.len();
+	let end_len = end.len();
 
 	if let Some(LDestructRest::Keep(slot)) = rest {
 		let full = full.clone();
@@ -62,11 +62,7 @@
 			Thunk!(move || {
 				let full = full.evaluate()?;
 				let to = full.len() - end_len;
-				Ok(Val::Arr(full.slice(
-					Some(start_len as i32),
-					Some(to as i32),
-					None,
-				)))
+				Ok(Val::Arr(full.slice(start_len..to)))
 			}),
 		);
 	}
@@ -79,10 +75,10 @@
 			Thunk!(move || {
 				let full = full.evaluate()?;
 				Ok(full
-					.get(full.len() - end_len + i as u32)?
+					.get(full.len() - end_len + i)?
 					.expect("length is checked"))
 			}),
-			a_ctx,
+			ctx,
 		);
 	}
 }
@@ -94,7 +90,7 @@
 
 	fill: &LocalsFrame,
 	value: Thunk<Val>,
-	a_ctx: &Context,
+	ctx: &Context,
 ) {
 	use jrsonnet_interner::IStr;
 	use rustc_hash::FxHashSet;
@@ -118,7 +114,7 @@
 			}
 		}
 		if !has_rest {
-			let len = obj.len();
+			let len = obj.len32();
 			if len as usize > field_names.len() {
 				bail!("too many fields, and rest not found");
 			}
@@ -142,10 +138,11 @@
 
 	for field in fields {
 		let field_name = field.name.clone();
-		let default_thunk: Option<Thunk<Val>> = field
-			.default
-			.as_ref()
-			.map(|(shape, expr)| build_b_thunk(a_ctx, shape, expr.clone()));
+		let default_thunk: Option<Thunk<Val>> = field.default.as_ref().map(|(shape, expr)| {
+			let expr = expr.clone();
+			let env = Context::enter_using(ctx, shape);
+			Thunk!(move || evaluate(env, &expr))
+		});
 
 		let field_full = full.clone();
 		let value_thunk = Thunk!(move || {
@@ -157,7 +154,7 @@
 		});
 
 		if let Some(into) = &field.into {
-			destruct(into, fill, value_thunk, a_ctx);
+			destruct(into, fill, value_thunk, ctx);
 		} else {
 			unreachable!("analyzer lowers object-destruct shorthands into `into`");
 		}
@@ -177,21 +174,18 @@
 		#[cfg(feature = "exp-destruct")]
 		LDestruct::Object { fields, rest } => destruct_object(fields, rest.as_ref(), fill, value, a_ctx),
 	}
-}
-
-pub fn build_b_thunk(a_ctx: &Context, shape: &ClosureShape, expr: Rc<LExpr>) -> Thunk<Val> {
-	let env = Context::enter_using(a_ctx, shape);
-	Thunk!(move || evaluate(env, &expr))
-}
-pub fn build_b_thunk_uno(a_ctx: &Context, shape: Rc<(ClosureShape, LExpr)>) -> Thunk<Val> {
-	let env = Context::enter_using(a_ctx, &shape.0);
-	Thunk!(move || evaluate(env, &shape.1))
 }
 
 pub fn fill_letrec_binds(fill: &LocalsFrame, ctx: &Context, binds: &[LBind]) {
 	for bind in binds {
-		let value_thunk = build_b_thunk(ctx, &bind.value_shape, bind.value.clone());
-		destruct(&bind.destruct, fill, value_thunk, ctx);
+		let expr = bind.value.clone();
+		let env = Context::enter_using(ctx, &bind.value_shape);
+		destruct(
+			&bind.destruct,
+			fill,
+			Thunk!(move || evaluate(env, &expr)),
+			ctx,
+		);
 	}
 }
 

--- a/crates/jrsonnet-evaluator/src/evaluate/mod.rs
+++ b/crates/jrsonnet-evaluator/src/evaluate/mod.rs
@@ -7,7 +7,7 @@
 
 use self::{
 	compspec::{evaluate_arr_comp, evaluate_obj_comp},
-	destructure::{build_b_thunk_uno, evaluate_local_expr, evaluate_locals_unbound},
+	destructure::{evaluate_local_expr, evaluate_locals_unbound},
 	operator::evaluate_binary_op_special,
 };
 use crate::{
@@ -115,6 +115,7 @@
 	}
 }
 
+#[allow(clippy::too_many_lines)]
 pub fn evaluate(ctx: Context, expr: &LExpr) -> Result<Val> {
 	Ok(match expr {
 		LExpr::Null => Val::Null,
@@ -218,7 +219,7 @@
 					BoundedUsize::from_untyped(v).description("slice step value")
 				})
 				.transpose()?;
-			Val::from(indexable.slice(start, end, step)?)
+			Val::from(indexable.slice32(start, end, step)?)
 		}
 		LExpr::Super => Val::Obj(ctx.try_sup_this()?.standalone_super().ok_or(NoSuperFound)?),
 		LExpr::Import {
@@ -320,6 +321,7 @@
 	)
 }
 
+#[allow(clippy::too_many_lines)]
 fn evaluate_index(ctx: Context, indexable: &LExpr, parts: &[LIndexPart]) -> Result<Val> {
 	let mut parts = parts.iter();
 	let mut indexable = if matches!(indexable, LExpr::Super) {
@@ -394,17 +396,17 @@
 				if n.fract() > f64::EPSILON {
 					bail!(FractionalIndex)
 				}
-				let len = arr.len();
+				let len = arr.len32();
 				if n < 0.0 || n > f64::from(len) {
 					bail!(ArrayBoundsError(n, len));
 				}
 				#[expect(
 					clippy::cast_possible_truncation,
 					clippy::cast_sign_loss,
-					reason = "n is checked positive"
+					reason = "n is checked range"
 				)]
 				let i = n as u32;
-				arr.get(i)
+				arr.get32(i)
 					.with_description_src(loc, || format!("element <{i}> access"))?
 					.ok_or_else(|| ArrayBoundsError(n, len))?
 			}
@@ -507,12 +509,13 @@
 		return Ok(());
 	};
 
-	let thunk = build_b_thunk_uno(&value_ctx, value.clone());
+	let env = Context::enter_using(&value_ctx, &value.0);
+	let value = value.clone();
 	builder
 		.field(name)
 		.with_add(*plus)
 		.with_visibility(*visibility)
-		.try_thunk(thunk)?;
+		.try_thunk(Thunk!(move || evaluate(env, &value.1)))?;
 	Ok(())
 }
 

--- a/crates/jrsonnet-evaluator/src/function/mod.rs
+++ b/crates/jrsonnet-evaluator/src/function/mod.rs
@@ -11,12 +11,10 @@
 	prepared::{PreparedCall, parse_prepared_builtin_call},
 };
 use crate::{
-	PackedContextSupThis, Result, Thunk, Val,
+	Context, PackedContextSupThis, Result, Thunk, Val,
 	analyze::LFunction,
-	evaluate::{
-		destructure::{build_b_thunk, destruct},
-		ensure_sufficient_stack, evaluate, evaluate_trivial,
-	},
+	arr::arridx,
+	evaluate::{destructure::destruct, ensure_sufficient_stack, evaluate, evaluate_trivial},
 	function::builtin::BuiltinFunc,
 };
 
@@ -83,7 +81,7 @@
 					&self.func.params[param_idx].destruct,
 					fill,
 					thunk.clone(),
-					&ctx,
+					ctx,
 				);
 			}
 			for &(param_idx, arg_idx) in prepared.named() {
@@ -91,15 +89,22 @@
 					&self.func.params[param_idx].destruct,
 					fill,
 					named[arg_idx].clone(),
-					&ctx,
+					ctx,
 				);
 			}
 
 			for &param_idx in prepared.defaults() {
 				let param = &self.func.params[param_idx];
 				let (shape, expr) = param.default.as_ref().expect("default exists");
-				let thunk = build_b_thunk(&ctx, shape, expr.clone());
-				destruct(&param.destruct, fill, thunk, &ctx);
+				let expr = expr.clone();
+				let env = Context::enter_using(ctx, shape);
+
+				destruct(
+					&param.destruct,
+					fill,
+					Thunk!(move || evaluate(env, &expr)),
+					ctx,
+				);
 			}
 		});
 
@@ -152,8 +157,8 @@
 		}
 	}
 	/// Amount of non-default required arguments
-	pub fn params_len(&self) -> u32 {
-		self.params().iter().filter(|p| !p.has_default()).count() as u32
+	pub fn params_len32(&self) -> u32 {
+		arridx(self.params().iter().filter(|p| !p.has_default()).count())
 	}
 	/// Function name, as defined in code.
 	pub fn name(&self) -> IStr {

--- a/crates/jrsonnet-evaluator/src/integrations/serde.rs
+++ b/crates/jrsonnet-evaluator/src/integrations/serde.rs
@@ -182,7 +182,7 @@
 			#[cfg(feature = "exp-bigint")]
 			Self::BigInt(b) => b.serialize(serializer),
 			Self::Arr(arr) => {
-				let mut seq = serializer.serialize_seq(Some(arr.len() as usize))?;
+				let mut seq = serializer.serialize_seq(Some(arr.len()))?;
 				for (i, element) in arr.iter().enumerate() {
 					let mut serde_error = None;
 					in_description_frame(
@@ -203,7 +203,7 @@
 				seq.end()
 			}
 			Self::Obj(obj) => {
-				let mut map = serializer.serialize_map(Some(obj.len() as usize))?;
+				let mut map = serializer.serialize_map(Some(obj.len32() as usize))?;
 				for (field, value) in obj.iter(
 					#[cfg(feature = "exp-preserve-order")]
 					true,