remove claude

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Barrett Ruth 2026-01-10 12:17:45 -05:00
parent 5c3280edfd
commit 10951a01a1

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# Likewise - Floating Point Diff Implementation
## Codebase Structure
```
src/
├── lib.rs # Main entry, re-exports
├── types.rs # DiffOp, Change, ChangeTag, Algorithm enums
├── common.rs # capture_diff_slices(), get_diff_ratio()
├── algorithms/ # myers.rs, patience.rs, lcs.rs, hook.rs, utils.rs
├── text/ # TextDiff, DiffableStr trait
├── udiff.rs # Unified diff output
└── utils.rs # Text utilities
```
## Current Diff Flow
1. `capture_diff_slices(alg, &old, &new)``Vec<DiffOp>`
2. `DiffOp::iter_changes(&old, &new)``Iterator<Change<T>>`
3. Requires `T: Hash + Eq + Ord`
## Key Types
```rust
pub enum DiffOp {
Equal { old_index: usize, new_index: usize, len: usize },
Delete { old_index: usize, old_len: usize, new_index: usize },
Insert { old_index: usize, new_index: usize, new_len: usize },
Replace { old_index: usize, old_len: usize, new_index: usize, new_len: usize },
}
pub struct Change<T> {
pub(crate) tag: ChangeTag,
pub(crate) old_index: Option<usize>,
pub(crate) new_index: Option<usize>,
pub(crate) value: T,
}
```
## Algorithm Trait
```rust
pub trait DiffHook {
type Error;
fn equal(&mut self, old: usize, new: usize, len: usize) -> Result<(), Self::Error>;
fn delete(&mut self, old: usize, old_len: usize, new: usize) -> Result<(), Self::Error>;
fn insert(&mut self, old: usize, new: usize, new_len: usize) -> Result<(), Self::Error>;
fn replace(&mut self, old: usize, old_len: usize, new: usize, new_len: usize) -> Result<(), Self::Error>;
}
```
## Task: FP Comparison
Add eps/ulps floating point comparison for f32/f64 slices.
### Implementation Points
1. **New comparison trait** alongside existing `PartialEq` requirement
2. **Algorithm modification** to use FP-aware comparison in core loops
3. **API surface** for specifying epsilon/ulps parameters
4. **Testing** edge cases: NaN, infinity, subnormals, precision boundaries
### Files to Modify
- `src/algorithms/myers.rs` - Core comparison logic
- `src/algorithms/patience.rs` - Core comparison logic
- `src/algorithms/lcs.rs` - Core comparison logic
- `src/common.rs` - Add FP-aware `capture_diff_slices_fp()`
- `examples/floating_point.rs` - Usage demonstration
### Example Usage Goal
```rust
let old = vec![1.0, 2.0, 3.0];
let new = vec![1.000001, 2.0, 3.1];
// Absolute epsilon
let ops = capture_diff_slices_fp_eps(Algorithm::Myers, &old, &new, 0.0001);
// Relative ulps
let ops = capture_diff_slices_fp_ulps(Algorithm::Myers, &old, &new, 4);
```
### Testing Strategy
Use existing `insta` snapshot testing framework. Test matrices:
- Normal values with various epsilon/ulps settings
- Edge cases: ±0.0, NaN, ±infinity
- Precision boundaries and subnormal values
- Mixed normal/edge case arrays
### Status
- [x] CI fixed (Rust 1.66 MSRV)
- [x] Codebase analysis complete
- [ ] Design FP comparison API
- [ ] Implement core FP comparison logic
- [ ] Add comprehensive tests
- [ ] Create usage examples