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add explanation for structs with inheritance

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This commit is contained in:
AlexKnauth 2015-12-05 14:45:01 -05:00
parent 3450c24127
commit 00485b16df
1 changed files with 7 additions and 0 deletions
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7
unstable/lens/struct-list.scrbl
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@ -15,6 +15,13 @@ Lenses that convert between structs and lists.
(lens-set (struct->list-lens foo) (foo 1 2 3) '(4 5 6))
(lens-view (list->struct-lens foo) '(1 2 3))
(lens-set (list->struct-lens foo) '(1 2 3) (foo 4 5 6))
]
For structs that inherit from other structs, it puts the inherited
fields first, so that it matches the arguments to the constructor:
@lens-unstable-examples[
(struct foo (a b c) #:transparent)
(struct bar foo (d e))
(lens-view (struct->list-lens bar) (bar 1 2 3 4 5))
(lens-set (struct->list-lens bar) (bar 1 2 3 4 5) '(6 7 8 9 10))