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refactor: replace letrec with let in non-recursive cases by FlyCloudC · Pull Request #2330 · moonbitlang/core · GitHub
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Changing from letrec to let may affect function recursion capabilities
Category
Correctness Code Snippet
letrec sort_2 = fn(a : Int, b : Int) {
let sort_2 = fn(a : Int, b : Int) { Recommendation
Verify that sort_2 and sort_3 don't need recursive capabilities before changing from letrec to let Reasoning
The letrec keyword typically allows functions to refer to themselves in their definitions. While in this case the functions don't appear to be recursive, removing letrec could break functionality if there were any hidden recursive calls.
Duplicated code across multiple sort implementation files
Category
Maintainability Code Snippet
sort_2 and sort_3 functions are identical across fixedarray_sort.mbt, fixedarray_sort_by.mbt, sort.mbt, and sort_by.mbt Recommendation
Consider extracting these common utility functions into a shared module or using generics/traits to reduce code duplication Reasoning
Having the same code duplicated across multiple files increases maintenance burden and risk of inconsistencies when changes are needed.
Lack of documentation for pivot selection logic
Category
Maintainability Code Snippet
if len > use_median_of_medians {
sort_3(a - 1, a, a + 1)
sort_3(b - 1, b, b + 1) Recommendation
Add comments explaining the pivot selection strategy and why specific positions are chosen for comparison Reasoning
The pivot selection logic is complex and uses magic numbers (like 8 for minimum length). Documentation would help future maintainers understand the algorithm's strategy and constraints.
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There are no letrec left in the core now.