Actionable comments posted: 1

vm/sre_engine/src/string.rs (2)

226-243: Incorrect pointer arithmetic – ptr.offset(1) advances the outer pointer

ptr is a &mut *const u8.
Using ptr.offset(1) increments the address of the pointer-variable itself, not the inner *const u8.
The intended behaviour is to move the inner pointer one byte forward.

All offset(±1) calls in this function (and the reverse variant below) therefore exhibit Undefined Behaviour and will crash or read past the buffer.

-*ptr = unsafe { ptr.offset(1) };
+*ptr = unsafe { (*ptr).add(1) };           // advance inner pointer

(The same fix applies to every subsequent offset(1) in this function.)

---

274-300: Same pointer-arithmetic bug in next_code_point_reverse

The reverse reader decrements the outer pointer:

*ptr = unsafe { ptr.offset(-1) };

It must mutate the inner pointer instead:

-*ptr = unsafe { ptr.offset(-1) };
+*ptr = unsafe { (*ptr).sub(1) };     // move inner pointer back

Apply the same substitution to every offset(-1) in this function to prevent memory corruption.

src/settings.rs (1)

28-31: Consider accepting case-insensitive values

Using Self::Ensurepip / Self::GetPip is fine, but the CLI currently rejects ENSUREPIP, EnsurePip, etc. You may wish to normalise the input with .to_ascii_lowercase() to match CPython’s behaviour.

compiler/codegen/src/compile.rs (4)

885-891: Duplicate “forbidden name” logic – consider deduplication

varname() now calls Self::is_forbidden_arg_name.
However we already have is_forbidden_name plus scattered ad-hoc checks. Maintaining three parallel helpers invites drift.

-        if Self::is_forbidden_arg_name(name) {
+        if is_forbidden_name(name) {

Unless you expect the two helpers to diverge semantically, prefer one canonical check.

---

3438-3452: Avoid the extra allocation when pushing attribute names

name.as_str().to_string().into() allocates a fresh String.
Wtf8Buf implements From<&str>, so you can eliminate the copy:

-            attr_names.push(ConstantData::Str {
-                value: name.as_str().to_string().into(),
-            });
+            attr_names.push(ConstantData::Str {
+                value: name.as_str().into(),
+            });

Minor, but this sits in a hot path for class-pattern matching.

---

3670-3673: Rotation loop can be collapsed

for _ in 0..=i_stores { pattern_helper_rotate(i_control + 1) } issues the same SWAP sequence i_stores+1 times.
A single call with count = (i_control + 1) * (i_stores + 1) would generate fewer instructions:

-for _ in 0..=i_stores {
-    self.pattern_helper_rotate(i_control + 1)?;
-}
+self.pattern_helper_rotate((i_control + 1) * (i_stores + 1))?;

Not critical, but it trims bytecode size for deeply nested OR-patterns.

---

4580-4592: Nit: compute default_kw_count once

Good readability tweak. You could inline the to_u32() conversion to avoid two casts:

-let default_kw_count = kw_with_defaults.len();
+let default_kw_count = kw_with_defaults.len().to_u32();
 ...
-    Instruction::BuildMap {
-        size: default_kw_count.to_u32(),
-    }
+    Instruction::BuildMap { size: default_kw_count }

Configuration used: .coderabbit.yml
Review profile: CHILL
Plan: Pro

Reviewing files that changed from the base of the PR and between 57029f6 and d602a26.

• common/src/boxvec.rs (1 hunks)
• common/src/format.rs (2 hunks)
• compiler/codegen/src/compile.rs (7 hunks)
• compiler/codegen/src/unparse.rs (1 hunks)
• compiler/core/src/bytecode.rs (25 hunks)
• compiler/core/src/frozen.rs (2 hunks)
• compiler/core/src/marshal.rs (6 hunks)
• compiler/literal/src/escape.rs (10 hunks)
• compiler/literal/src/float.rs (1 hunks)
• examples/call_between_rust_and_python.rs (1 hunks)
• src/settings.rs (1 hunks)
• src/shell/helper.rs (1 hunks)
• stdlib/src/unicodedata.rs (1 hunks)
• vm/src/builtins/code.rs (3 hunks)
• vm/src/builtins/dict.rs (1 hunks)
• vm/src/builtins/genericalias.rs (4 hunks)
• vm/src/builtins/namespace.rs (1 hunks)
• vm/src/builtins/slice.rs (1 hunks)
• vm/src/builtins/str.rs (1 hunks)
• vm/src/builtins/super.rs (1 hunks)
• vm/src/builtins/traceback.rs (1 hunks)
• vm/src/builtins/tuple.rs (3 hunks)
• vm/src/frame.rs (3 hunks)
• vm/src/stdlib/ast/python.rs (1 hunks)
• vm/src/stdlib/io.rs (1 hunks)
• vm/src/stdlib/itertools.rs (1 hunks)
• vm/src/stdlib/posix.rs (3 hunks)
• vm/src/stdlib/symtable.rs (1 hunks)
• vm/src/stdlib/thread.rs (1 hunks)
• vm/src/stdlib/typing.rs (1 hunks)
• vm/sre_engine/src/engine.rs (5 hunks)
• vm/sre_engine/src/string.rs (4 hunks)
• wtf8/src/core_str_count.rs (1 hunks)
• wtf8/src/lib.rs (27 hunks)

📄 CodeRabbit Inference Engine (.github/copilot-instructions.md)

**/*.rs: Follow the default rustfmt code style (cargo fmt to format)
Always run clippy to lint code (cargo clippy) before completing tasks. Fix any warnings or lints that are introduced by your changes
Follow Rust best practices for error handling and memory management
Use the macro system (pyclass, pymodule, pyfunction, etc.) when implementing Python functionality in Rust

Files:

• vm/src/stdlib/ast/python.rs
• compiler/codegen/src/unparse.rs
• src/settings.rs
• vm/src/stdlib/thread.rs
• compiler/core/src/frozen.rs
• stdlib/src/unicodedata.rs
• vm/src/builtins/super.rs
• vm/src/builtins/dict.rs
• vm/src/stdlib/typing.rs
• vm/src/builtins/namespace.rs
• common/src/boxvec.rs
• compiler/literal/src/float.rs
• vm/src/stdlib/itertools.rs
• wtf8/src/core_str_count.rs
• vm/src/stdlib/io.rs
• vm/src/builtins/traceback.rs
• vm/src/builtins/genericalias.rs
• vm/src/builtins/str.rs
• vm/src/builtins/slice.rs
• common/src/format.rs
• src/shell/helper.rs
• examples/call_between_rust_and_python.rs
• vm/src/stdlib/symtable.rs
• vm/src/builtins/code.rs
• vm/src/stdlib/posix.rs
• vm/sre_engine/src/string.rs
• compiler/core/src/marshal.rs
• vm/src/builtins/tuple.rs
• compiler/core/src/bytecode.rs
• vm/src/frame.rs
• compiler/codegen/src/compile.rs
• vm/sre_engine/src/engine.rs
• compiler/literal/src/escape.rs
• wtf8/src/lib.rs

Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-07-19T03:16:56.511Z
Learning: Applies to **/*.rs : Follow Rust best practices for error handling and memory management

Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-07-19T03:16:56.511Z
Learning: Applies to **/*.rs : Use the macro system (pyclass, pymodule, pyfunction, etc.) when implementing Python functionality in Rust

Learnt from: youknowone
PR: #5945
File: vm/src/stdlib/typing.rs:132-136
Timestamp: 2025-07-11T07:16:06.225Z
Learning: In Python 3.12, TypeAliasType's repr method returns just the alias name as a string (e.g., repr(A) returns 'A'), not the "" format. This applies to type aliases created with the type statement syntax.

Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-07-19T03:16:56.511Z
Learning: Applies to **/*.rs : Use the macro system (pyclass, pymodule, pyfunction, etc.) when implementing Python functionality in Rust

Learnt from: moreal
PR: #5847
File: vm/src/stdlib/stat.rs:547-567
Timestamp: 2025-06-27T14:47:28.810Z
Learning: In RustPython's stat module implementation, platform-specific constants like SF_SUPPORTED and SF_SYNTHETIC should be conditionally declared only for the platforms where they're available (e.g., macOS), following CPython's approach of optional declaration using #ifdef checks rather than providing fallback values for other platforms.

Learnt from: moreal
PR: #5847
File: vm/src/stdlib/stat.rs:547-567
Timestamp: 2025-06-27T14:47:28.810Z
Learning: In RustPython's stat module implementation, platform-specific constants like SF_SUPPORTED and SF_SYNTHETIC should be conditionally declared only for the platforms where they're available (e.g., macOS), following CPython's approach of optional declaration rather than providing fallback values for other platforms.

Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-07-19T03:16:56.511Z
Learning: Applies to **/*.rs : Use the macro system (pyclass, pymodule, pyfunction, etc.) when implementing Python functionality in Rust

Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-07-19T03:16:56.511Z
Learning: Applies to **/*.rs : Follow Rust best practices for error handling and memory management

Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-07-19T03:16:56.511Z
Learning: Applies to **/*.rs : Follow Rust best practices for error handling and memory management

Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-07-19T03:16:56.511Z
Learning: Applies to **/*.rs : Follow Rust best practices for error handling and memory management

vm/src/builtins/zip.rs (1)

• zelf (50-54)

vm/src/protocol/sequence.rs (1)

• tuple (279-289)

wtf8/src/core_str.rs (2)

• next_code_point (33-67)
• next_code_point_reverse (76-110)

• GitHub Check: Check Rust code with rustfmt and clippy
• GitHub Check: Check the WASM package and demo
• GitHub Check: Run snippets and cpython tests on wasm-wasi
• GitHub Check: Run tests under miri
• GitHub Check: Run rust tests (windows-latest)
• GitHub Check: Run snippets and cpython tests (windows-latest)
• GitHub Check: Ensure compilation on various targets

examples/call_between_rust_and_python.rs (1)

90-93: Idiomatic Self usage looks good

Switching to Ok(Self { name }) is concise and fully equivalent to the previous explicit type. No functional change introduced.

compiler/core/src/frozen.rs (2)

60-60: Pure formatting – no issues

---

88-88: Pure formatting – no issues

stdlib/src/unicodedata.rs (1)

19-28: Iteration simplification approved

Dropping the explicit .into_iter() makes the loop cleaner without changing semantics.

vm/src/builtins/super.rs (1)

173-178: Minor style improvement acknowledged

Iterating with for cls in &mro is the preferred idiom. Behaviour remains unchanged.

vm/src/stdlib/itertools.rs (1)

1383-1386: Iteration now uses &zelf.pools – idiomatic and fine

Switching from self.pools.iter() to for element in &zelf.pools is equivalent, more concise, and keeps the borrow checker happy. No functional or performance concerns here.

vm/src/builtins/dict.rs (1)

279-285: Loop over kwargs is correct and more idiomatic

Dropping the explicit .into_iter() simplifies the code without changing semantics—the for (key, value) in kwargs pattern consumes the KwArgs value exactly as before. Insertions into self.entries remain unchanged.

vm/src/builtins/slice.rs (1)

231-231: LGTM! Idiomatic iteration syntax improvement.

This change from iterating over an array to iterating over a slice reference follows Rust best practices and maintains identical semantics while using more concise syntax.

vm/src/builtins/str.rs (1)

1524-1524: LGTM! Improved type consistency using Self.

Replacing the explicit type PyRef<PyStr> with Self improves code maintainability and follows Rust conventions for self-referential types. The transmute logic and safety invariants remain unchanged.

wtf8/src/core_str_count.rs (2)

98-98: LGTM! Enabling compile-time evaluation.

Converting to const fn allows this function to be evaluated at compile time when arguments are known, providing a performance benefit without changing runtime behavior.

---

106-106: LGTM! Enabling compile-time evaluation.

Converting to const fn allows this function to be evaluated at compile time when arguments are known, providing a performance benefit without changing runtime behavior.

src/shell/helper.rs (1)

57-57: LGTM! Enabling compile-time construction.

Converting the constructor to const fn allows ShellHelper instances to be created at compile time when parameters are constant, following the PR's pattern of increasing const-correctness throughout the codebase.

vm/src/stdlib/posix.rs (7)

519-519: LGTM: Idiomatic iteration simplification.

Removing the explicit .into_iter() call is more idiomatic since vectors automatically implement IntoIterator for direct iteration.

---

1606-1608: LGTM: Appropriate const fn for libc macro.

The WIFSIGNALED libc macro performs bit manipulation operations that are const-evaluable, making this const fn annotation appropriate.

---

1611-1613: LGTM: Appropriate const fn for libc macro.

The WIFSTOPPED libc macro is const-evaluable, making this const fn annotation appropriate.

---

1616-1618: LGTM: Appropriate const fn for libc macro.

The WIFEXITED libc macro is const-evaluable, making this const fn annotation appropriate.

---

1621-1623: LGTM: Appropriate const fn for libc macro.

The WTERMSIG libc macro is const-evaluable, making this const fn annotation appropriate.

---

1626-1628: LGTM: Appropriate const fn for libc macro.

The WSTOPSIG libc macro is const-evaluable, making this const fn annotation appropriate.

---

1631-1633: LGTM: Appropriate const fn for libc macro.

The WEXITSTATUS libc macro is const-evaluable, making this const fn annotation appropriate.

compiler/core/src/marshal.rs (6)

117-143: LGTM: Well-designed convenience methods.

These convenience methods provide type-safe ways to read fixed-size data types with proper error handling and const generic array sizes. The consistent use of little-endian byte order aligns with the marshaling format requirements.

---

149-151: LGTM: Consistent borrowed string reading method.

The read_str_borrow method follows the established pattern of the ReadBorrowed trait and includes proper UTF-8 validation with appropriate error handling.

---

277-277: LGTM: Improved type relationships through associated types.

Adding the ConstantBag associated type and updating the constant_bag method signature improves type safety and makes the relationship between MarshalBag and ConstantBag explicit in the type system.

Also applies to: 315-315

---

320-320: LGTM: Proper implementation of associated type constraint.

The implementation correctly handles the new ConstantBag associated type by setting it to Self and returning self in the constant_bag method, which is appropriate for the default case.

Also applies to: 388-390

---

465-465: LGTM: Enhanced type constraints in Dumpable trait.

Adding the Constant: Constant associated type constraint improves type safety and makes the relationship between Dumpable and Constant types explicit.

---

518-532: LGTM: Consistent write convenience methods.

These convenience methods mirror the Read trait additions and provide type-safe ways to write fixed-size data types with consistent little-endian byte order. The implementation follows established patterns and improves API usability.

wtf8/src/lib.rs (6)

94-96: LGTM! Idiomatic use of Self in constructor.

Using Self instead of the explicit type name improves code clarity and maintainability.

---

102-107: LGTM! Consistent use of Self in return type.

The change from Option<CodePoint> to Option<Self> maintains consistency with the constructor pattern improvements throughout the codebase.

---

113-117: LGTM! Constructor consistency improved.

Using Self { value } instead of CodePoint { value } follows Rust best practices for constructor implementations.

---

246-248: LGTM! Trait implementation improvement.

Using &Self::Target instead of the explicit type is more idiomatic and flexible.

---

639-643: LGTM! Clean trait implementation.

The AsRef<Self> implementation using Self is idiomatic and improves code consistency.

---

949-952: LGTM! Improved constructor method.

Using Box::default() instead of Default::default() and returning Box<Self> makes the code more concise and idiomatic.

vm/src/stdlib/typing.rs (1)

168-168: LGTM! Idiomatic constructor call.

Using Self::new instead of TypeAliasType::new is more idiomatic within the impl block and improves code consistency.

vm/src/stdlib/thread.rs (1)

289-291: LGTM! Performance improvement with const fn.

Converting allocate_lock to a const fn enables compile-time evaluation while maintaining the same functionality. This aligns with the broader pattern in the PR of making eligible functions const.

compiler/codegen/src/unparse.rs (1)

467-470: LGTM! Simplified iteration syntax.

Replacing .iter() with direct iteration over &args.kwonlyargs is more idiomatic and concise while maintaining the same functionality.

vm/src/stdlib/ast/python.rs (1)

74-74: LGTM! Idiomatic method call.

Using Self::__init__ instead of NodeAst::__init__ is more idiomatic within the impl block and improves code consistency with the broader codebase changes.

vm/src/stdlib/io.rs (1)

3603-3606: const fn conversion is sound

The getter is pure and independent of runtime state, so making it const fn is perfectly safe and aligns with the broader const-ification effort.

vm/src/builtins/namespace.rs (1)

64-64: LGTM: Idiomatic iteration simplification.

Removing the explicit .into_iter() call is correct and more idiomatic when the collection already implements IntoIterator.

vm/src/stdlib/symtable.rs (1)

72-77: LGTM: Appropriate const fn conversion.

Converting this method to const fn is correct since it only performs pattern matching on enum variants, which can be evaluated at compile time.

common/src/boxvec.rs (1)

168-168: LGTM: More idiomatic range syntax.

Using index..=index instead of index..index + 1 is more readable and idiomatic for representing a single-element range, while maintaining identical functionality.

compiler/literal/src/float.rs (1)

47-52: LGTM: Appropriate const fn conversion.

Converting this function to const fn is correct since it only performs pattern matching on primitive types and returns string literals, enabling beneficial compile-time evaluation.

vm/src/builtins/traceback.rs (2)

72-72: LGTM: Idiomatic use of Self keyword.

Replacing explicit type references with Self is more idiomatic and maintainable Rust code.

---

78-78: LGTM: Consistent Self keyword usage.

Using Self::new instead of explicit type name maintains consistency and follows Rust best practices.

vm/src/builtins/genericalias.rs (4)

341-341: LGTM: Idiomatic iteration simplification.

The direct iteration over the tuple reference is more idiomatic than explicitly calling .iter().

---

390-390: LGTM: Consistent iteration style improvement.

Direct iteration over the tuple reference maintains consistency with the idiomatic Rust style being applied throughout the codebase.

---

487-487: LGTM: Maintains consistency in iteration style.

This change aligns with the pattern of simplifying iteration syntax throughout the file.

---

575-575: LGTM: Idiomatic array iteration.

Direct iteration over the array reference is more concise and idiomatic than explicitly calling .iter().

common/src/format.rs (2)

392-392: LGTM: More idiomatic inclusive range syntax.

Using 1..=sep_cnt is clearer and more idiomatic than 1..sep_cnt + 1 when including the end value.

---

757-757: LGTM: Idiomatic use of Self.

Using Self:: instead of the explicit type name is more idiomatic and maintainable within impl blocks.

vm/src/builtins/code.rs (4)

110-110: LGTM: Minor formatting improvement.

The additional blank line improves code readability.

---

127-145: LGTM: Simplified match arms improve readability.

Removing the redundant bytecode:: prefix makes the match arms cleaner and more readable. The consistency across all arms is good.

---

147-147: LGTM: Formatting improvement.

---

175-175: LGTM: Idiomatic use of Self in trait implementation.

Using Self as the return type is more idiomatic and maintainable than the explicit type name in trait implementations.

vm/src/builtins/tuple.rs (6)

234-234: LGTM: Idiomatic use of Self in return type.

Using PyRef<Self> is more concise and maintainable than the explicit generic type in the return position.

---

240-240: LGTM: Consistent use of Self in transmute.

Using Self in the transmute maintains consistency with the return type and improves maintainability.

---

341-341: LGTM: Idiomatic iteration over slice reference.

Direct iteration over &self.elements is more concise than explicitly calling .iter().

---

485-485: LGTM: Consistent Self usage in transmute.

Using Self in the transmute operation maintains consistency with the broader pattern of idiomatic type references.

---

492-492: LGTM: Maintains consistency in transmute operations.

---

499-499: LGTM: Completes consistent Self usage pattern.

This final transmute change maintains consistency with the idiomatic use of Self throughout the implementation.

vm/src/frame.rs (1)

344-353: const fn likely fails to compile on stable Rust

Cell::<u32>::get() is not yet a const fn on stable.
Marking ExecutingFrame::lasti as const fn will therefore break the build (unless you compile with nightly and the relevant feature flags).

Consider reverting to a plain #[inline(always)] fn, or gate the const with a feature flag.

-#[inline(always)]
-const fn lasti(&self) -> u32 {
+#[inline(always)]
+fn lasti(&self) -> u32 {

Please run cargo check --all-targets to verify compilation.

compiler/codegen/src/compile.rs (3)

363-379: Initialization looks good – no actionable issues spotted

The refactor to use Self { .. } keeps the constructor readable and aligns with idiomatic struct-literal style. No functional impact.

---

383-385: is_two_element_slice promoted to const fn

Good call; this allows the pattern-check to be evaluated in a const‐context if ever needed and is zero-cost at runtime.
No concerns.

---

4551-4567: Reliable fallback to empty Parameters

Introducing a cached default_params avoids repeated Parameters::default() construction – nice micro-optimisation.
No further comments.

compiler/literal/src/escape.rs (9)

11-16: LGTM! Proper const fn conversion and Self usage.

The conversion to const fn is appropriate here since this is a simple pattern match with no side effects. Using Self:: variants instead of Quote:: improves code consistency and maintainability.

---

21-31: LGTM! Consistent Self usage in pattern matches.

The updated pattern matches using Self::Single and Self::Double maintain consistency with the swap method changes and follow Rust idioms.

---

98-101: LGTM! Appropriate const fn conversion.

The with_forced_quote constructor can be safely marked as const fn since it only performs struct initialization without any runtime computation.

---

112-114: LGTM! Valid const fn conversion for accessor method.

The str_repr method is a simple wrapper that returns a struct, making it suitable for const fn.

---

172-181: LGTM! Appropriate const fn for nested helper.

The nested stop function is correctly marked as const fn since it only constructs and returns an EscapeLayout struct without side effects.

---

286-293: LGTM! Proper const fn conversions for constructors.

All three AsciiEscape constructor methods (new, with_forced_quote, and bytes_repr) are appropriately converted to const fn as they only perform struct initialization.

Also applies to: 290-293, 304-306

---

332-332: LGTM! Simplified iteration syntax.

Removing the explicit .iter() calls and iterating directly over slices is more idiomatic Rust and slightly more efficient.

Also applies to: 416-416

---

346-355: LGTM! Consistent const fn pattern for nested helper.

The nested stop function in AsciiEscape follows the same pattern as in UnicodeEscape, properly marked as const fn.

---

373-379: LGTM! Appropriate const fn for utility function.

The escaped_char_len function performs only compile-time deterministic pattern matching, making it suitable for const fn.

vm/sre_engine/src/engine.rs (9)

71-73: LGTM! Simple getter method appropriately marked const.

The last_index method is a straightforward field accessor that can be safely evaluated at compile time.

---

1057-1059: LGTM! Arithmetic computation suitable for const fn.

The remaining_codes method performs simple arithmetic on compile-time accessible fields, making it appropriate for const fn.

---

1061-1063: LGTM! Simple arithmetic operation for const fn.

The remaining_chars method calculates the difference between two usize values, which is a const-safe operation.

---

1100-1102: LGTM! State mutation method correctly marked const.

While this method mutates self.code_position, the const keyword here refers to the ability to call this method in const contexts when the receiver is mutable, which is correct.

---

1108-1111: LGTM! Simple comparison suitable for const fn.

The at_beginning method performs a simple field comparison that can be evaluated at compile time.

---

1113-1115: LGTM! Field comparison appropriate for const fn.

The at_end method compares cursor position with request end, which is const-safe.

---

1147-1158: LGTM! Complex logic correctly implemented as const fn.

The can_success method contains conditional logic that can all be evaluated at compile time since it only involves field comparisons and boolean operations.

---

1166-1168: LGTM! Method delegation appropriate for const fn.

The next_offset method delegates to next_at with simple arithmetic, suitable for const evaluation.

---

1171-1179: LGTM! Struct construction with field update syntax.

The next_at method creates a new instance using struct update syntax, which is const-safe. The field assignments and struct literal are all compile-time operations.

compiler/core/src/bytecode.rs (13)

45-45: LGTM! Formatting improvements enhance readability.

The spacing adjustments around trait implementations and function definitions improve code consistency and readability without affecting functionality.

Also applies to: 48-48, 67-67, 69-69, 71-71, 73-73, 75-75, 81-81, 88-88, 99-99, 103-103, 107-107, 113-113, 119-119

---

182-184: LGTM! Appropriate const fn conversion.

Converting OpArgByte::null() to const fn is correct as it's a simple constructor with no side effects that can be evaluated at compile time.

---

199-201: LGTM! Appropriate const fn conversions.

Both OpArg::null() and OpArg::instr_size() are correctly converted to const fn as they perform simple operations without side effects that can be evaluated at compile time.

Also applies to: 205-207

---

247-249: LGTM! Appropriate const fn conversion.

Converting OpArgState::reset() to const fn is correct as it performs a simple assignment operation that can be evaluated at compile time.

---

254-254: LGTM! Consistent formatting improvements.

The spacing adjustments in trait implementations enhance code readability and maintain consistency across the codebase.

Also applies to: 264-264, 276-276, 288-288

---

317-319: LGTM! Appropriate const fn conversion.

Converting Arg<T>::marker() to const fn is correct as it only constructs a PhantomData which is const-evaluable.

---

325-333: LGTM! Const fn conversions appear valid.

The const fn conversions for Arg<T> methods are appropriate, assuming the underlying trait implementations (Into, OpArgType) support const evaluation. Since this code compiles, these conversions are valid.

Also applies to: 334-337, 339-342, 346-350

---

358-358: LGTM! Consistent formatting improvements.

The spacing adjustments continue to improve code readability and maintain consistency.

Also applies to: 378-378, 402-402

---

715-715: LGTM! Appropriate const fn conversion and formatting.

Converting CodeUnit::new() to const fn is correct as it's a simple struct constructor, and the spacing adjustments improve readability.

Also applies to: 718-718, 752-754

---

769-769: LGTM! Consistent formatting improvements.

The spacing adjustments in trait implementations maintain code consistency.

Also applies to: 775-775

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886-886: LGTM! Improved byte literal display formatting.

The change from Debug formatting to using escape_ascii() with raw string literal provides more consistent and readable output for byte constants, aligning better with Python's byte literal representation.

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1253-1269: LGTM! Appropriate const fn conversions for pattern matching methods.

Converting Instruction::label_arg() and Instruction::unconditional_branch() to const fn is correct as they perform simple pattern matching operations that can be evaluated at compile time.

Also applies to: 1280-1290

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808-808: LGTM! Comprehensive formatting improvements.

All the spacing adjustments throughout the file improve code readability and maintain consistent formatting without affecting functionality.

Also applies to: 834-834, 869-869, 905-905, 908-908, 1018-1018, 1024-1024, 1616-1616, 1618-1618, 1620-1620, 1622-1622, 1624-1624, 1628-1628, 1632-1632, 1636-1636, 1640-1640