Comments (4)
And that's what this does: #29
Edit: that's what #36 does.
from lens.
Oh, wait, not for an already existing struct type.
from lens.
If @lexi-lambda exposes the get-struct-accessors
function or some version of it, (see lexi-lambda/racket-alexis#2), then it will be pretty easy to do that for an existing struct type.
from lens.
That would be useful for defining lenses for all fields of an existing struct type. Would it still apply for only an individual field? I'm imagining something like:
(struct foo (a b c))
(define foo-a-lens (struct-lens foo a))
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Related Issues (20)
- struct->vector isomorphism HOT 5
- lens-zoom examples shouldn't use isomoprhism lenses
- Add digit->char isomorphism
- There should be a test for the cond-lens error case.
- There should be a test for the string-split-lens case where the input violates the lens laws HOT 2
- struct->struct lens? HOT 1
- Rethink unstable collection? HOT 2
- Test `lens-compose` / `compose` relationship HOT 1
- using append* n times vs. flattening a nested list of a given depth HOT 9
- Matrix lenses? HOT 2
- Disarm and re-arm syntax objects within srcloc-lens setters HOT 1
- Modulo lens HOT 3
- Struct inheritence and lenses HOT 32
- How should we name lenses for improper syntax lists? HOT 6
- separate tests into `lens-test` repository HOT 13
- Add prisms or other functionality that tests a lens's applicability HOT 4
- lens-join/* functions produce non-lenses when views overlap HOT 2
- Docs: Is the "last set wins" law right (strong enough)? HOT 3
- Waffle.io has closed HOT 1
- Add seemingly missing (list-filtered-lens) function. HOT 5
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from lens.