[analysis] Add a FullLattice concept and Inverted lattice #6038
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This was referenced Oct 21, 2023
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This was referenced Oct 21, 2023
kripken
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Oct 23, 2023
ashleynh
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Oct 24, 2023
| template<typename L> | ||
| concept FullLattice = | ||
| Lattice<L> && requires(const L& lattice, | ||
| const typename L::Element& constElem, |
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Can you explain why access to L::Element& is needed as both a const and !const?
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This is for the join and meet operations, which need to take a mutable reference as their first argument because it will be modified in-place. Otherwise all other uses of elements are const.
| const typename L::Element& constElem, | ||
| typename L::Element& elem) { | ||
| { lattice.getTop() } noexcept -> std::same_as<typename L::Element>; | ||
| { lattice.meet(elem, constElem) } noexcept -> std::same_as<bool>; |
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Is meet intended to be the greatest lower bound?
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Yes, will add a comment.
The FullLattice concept extends the base Lattice with `getTop` and `meet` operations. The `Inverted` lattice uses these operations to reverse the order of an arbitrary full lattice, for example to create a lattice of integers ordered by `>` rather than by `<`.
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…y#6038) The FullLattice concept extends the base Lattice with `getTop` and `meet` operations. The `Inverted` lattice uses these operations to reverse the order of an arbitrary full lattice, for example to create a lattice of integers ordered by `>` rather than by `<`.
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The FullLattice concept extends the base Lattice with
getTopandmeetoperations. The
Invertedlattice uses these operations to reverse the order ofan arbitrary full lattice, for example to create a lattice of integers ordered
by
>rather than by<.