map-syntax

Syntax sugar for defining maps

LTS Haskell 24.27:	0.3@rev:9
Stackage Nightly 2026-01-09:	0.3@rev:10
Latest on Hackage:	0.3@rev:10

See all snapshots map-syntax appears in

BSD-3-Clause licensed by Doug Beardsley

Maintained by [email protected]

This version can be pinned in stack with:map-syntax-0.3@sha256:9c9b2158a91c516d822a517e38a2215880b2b1add46340f5c97f349fc8d15b9c,2410

Module documentation for 0.3

Data
- Data.Map
  - Data.Map.Syntax

Depends on 3 packages(full list with versions):

base, containers, mtl

Used by 1 package in nightly-2026-01-08(full list with versions):

heist

Haskell’s canonical list of tuples syntax for defining maps is not very convenient and also has ambiguous semantics. This package leverages do notation to create a lighter syntax that makes semantics explicit and also allows the option of fail-fast handling of duplicate keys.