Add controlled fine-grained steps to Double default mutator#59
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Abhishek21g wants to merge 1 commit into
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Add controlled fine-grained steps to Double default mutator#59Abhishek21g wants to merge 1 commit into
Abhishek21g wants to merge 1 commit into
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Include ULP nextUp/nextDown and relative deltas in the normal mutate candidate set, and replace binary-inexact ±0.1 with snapped tenths so fine exploration does not accumulate mantissa noise.
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Summary
Fixes #49.
Double.defaultMutator.mutatehad no controlled fine-grained step in the normal path (nextUp/nextDownonly in the extreme-magnitude fallback), and ±0.1 accumulates binary float noise. The candidate set now includes ULP neighbors, relative deltas, and snapped tenths, while keeping coarse ±1 / ×2 / ÷2 / negate.Verification
doubleDefaultMutatorReachesULPNeighbors; existing never-identity test retainedswift testblocked by package-benchmark/jemalloc on stock Xcode; please run mutator tests in CI