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steve-downey / transpose / 28730967469
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Ran 05 Jul 2026 05:42AM UTC
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Run time 1min
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05 Jul 2026 05:40AM UTC coverage: 96.97%. Remained the same
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Blog (Part 3): the technique is optional; the contract is names + laws

A typeclass instance is just the looked-up dictionary: its only contract is
that all the operation names are present and behave lawfully. The Impl/base/Map
CRTP layering is a convenience for cheapness, not a requirement -- derive,
hand-write, generate, or wrap; two instances of one typeclass can be built by
different means and stay interchangeable, since algorithms see only the
dictionary and its laws (the numeric_limits freedom).

256 of 264 relevant lines covered (96.97%)

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