1. 24 Aug, 2020 1 commit
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  4. 21 Jul, 2020 1 commit
    • Tej Chajed's avatar
      Use user names when destructing existentials · 7d0bb151
      Tej Chajed authored and Robbert Krebbers's avatar Robbert Krebbers committed
      When running `iDestruct "H" as (?) "H"`, use the name of the binder in
      "H". For example, if "H" has type `∃ y, Φ y`,  we now use `y` as the
      name of the variable after freshening. Previously the name was always
      the equivalent of running `fresh H`.
      
      The implementation achieves this by forwarding the desired identifier
      name through the `IntoExist` typeclass. Identifiers are serialized in
      Gallina by using them as the name of a function of type `ident_name :=
      unit -> unit`.
      7d0bb151
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    • Robbert Krebbers's avatar
      The unbounded fractional authoritative camera. · 151dda05
      Robbert Krebbers authored
      The unbounded fractional authoritative camera is a version of the fractional
      authoritative camera that can be used with fractions `> 1`.
      
      Most of the reasoning principles for this version of the fractional
      authoritative cameras are the same as for the original version. There are two
      difference:
      
      - We get the additional rule that can be used to allocate a "surplus", i.e.
        if we have the authoritative element we can always increase its fraction
        and allocate a new fragment.
      
            ✓ (a ⋅ b) → ●U{p} a ~~> ●U{p + q} (a ⋅ b) ⋅ ◯U{q} b
      
      - At the cost of that, we no longer have the `◯U{1} a` is an exclusive
        fragmental element (cf. `frac_auth_frag_validN_op_1_l`).
      151dda05
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