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Presheaf definition leads to unsolved metavariable for base category #1010

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jpoiret opened this issue Jun 8, 2023 · 3 comments
Open

Presheaf definition leads to unsolved metavariable for base category #1010

jpoiret opened this issue Jun 8, 2023 · 3 comments

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@jpoiret
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jpoiret commented Jun 8, 2023 •
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Hi everyone,

Since Presheaf C ... is defined as Functor (C ^op) (SETS ...), C can't be inferred from an argument P : Presheaf C .... This is because Agda 2.6.3 can't solve sym _A = B for paths _A and B, so can't deduce the original ⋆Assoc. This should be fixed in agda/agda#6645, but in the meantime, should we refactor Presheaves to have Copresheaves as the primary type on which everything is defined? This way, there's no reason to have to solve _C ^op = C.
@jpoiret jpoiret mentioned this issue Jun 20, 2023
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@felixwellen felixwellen mentioned this issue Jun 20, 2023
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@maxsnew
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maxsnew commented Jun 21, 2023

Have you tried out agda HEAD to see that it is fixed? I don't think we should bother making a big change if we know it's fixed in the next version of Agda anyway.

@jpoiret
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jpoiret commented Jun 23, 2023

Not yet, but I do expect this to work on latest HEAD.

@maxsnew
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maxsnew commented May 9, 2024

has this been fixed upstream?

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@maxsnew @jpoiret