Popularity

9.1

Growing

Activity

2.1

Stars 96

Watchers 7

Forks 16

Last Commit 3 months ago

Monthly Downloads: 78

Programming language: Haskell

License: Mozilla Public License 2.0

Tags: Data Data Structures Types

Latest version: v0.3.3.0

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README

typerep-map

logo

[](LICENSE)

typerep-map introduces TMap and TypeRepMap — data structures like Map, but where types serve as keys, and values have the types specified in the corresponding key spots.

For the more details on the implementation see the following blog post:

typerep-map step by step

Usage example

ghci> import Data.TMap

ghci> tm = insert True $ one (42 :: Int)

ghci> size tm
2

ghci> res = lookup tm

ghci> res :: Maybe Int
Just 42

ghci> res :: Maybe Bool
Just True

ghci> res :: Maybe String
Nothing

ghci> lookup (insert "hello" tm) :: Maybe String
Just "hello"

ghci> member @Int tm
True

ghci> tm' = delete @Int tm

ghci> member @Int tm'
False