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Within LTS Haskell 24.36 (ghc-9.10.3)
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Type-safe EDSL for SQL queries on persistent backends. esqueleto is a bare bones, type-safe EDSL for SQL queries that works with unmodified persistent SQL backends. Its language closely resembles SQL, so you don't have to learn new concepts, just new syntax, and it's fairly easy to predict the generated SQL and optimize it for your backend. Most kinds of errors committed when writing SQL are caught as compile-time errors---although it is possible to write type-checked esqueleto queries that fail at runtime. persistent is a library for type-safe data serialization. It has many kinds of backends, such as SQL backends (persistent-mysql, persistent-postgresql, persistent-sqlite) and NoSQL backends (persistent-mongoDB). While persistent is a nice library for storing and retrieving records, including with filters, it does not try to support some of the features that are specific to SQL backends. In particular, esqueleto is the recommended library for type-safe JOINs on persistent SQL backends. (The alternative is using raw SQL, but that's error prone and does not offer any composability.) Currently, SELECTs, UPDATEs, INSERTs and DELETEs are supported. Not all SQL features are available, but most of them can be easily added (especially functions), so please open an issue or send a pull request if you need anything that is not covered by esqueleto on https://github.com/bitemyapp/esqueleto. The name of this library means "skeleton" in Portuguese and contains all three SQL letters in the correct order =). It was inspired by Scala's Squeryl but created from scratch.
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essence-of-live-coding General purpose live coding framework essence-of-live-coding is a general purpose and type safe live coding framework. You can run programs in it, and edit, recompile and reload them while they're running. Internally, the state of the live program is automatically migrated when performing hot code swap. The library also offers an easy to use FRP interface. It is parametrized by its side effects, separates data flow cleanly from control flow, and allows to develop live programs from reusable, modular components. There are also useful utilities for debugging and quickchecking.
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exception-transformers Type classes and monads for unchecked extensible exceptions. This package provides type classes, a monad and a monad transformer that support unchecked extensible exceptions as well as asynchronous exceptions. It is compatible with the transformers package.
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Portable interface to file locking (flock / LockFileEx) This package provides an interface to Windows and Unix file locking functionalities.
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Expressive file and directory manipulation for Haskell. A Haskell library for working with files and directories. Includes code for pattern matching, finding files, modifying file contents, and more.
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High-performance parsing from strict bytestrings Flatparse is a high-performance parsing library for strict bytestring input. See the README for more information: https://github.com/AndrasKovacs/flatparse.
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A general abstraction for manipulating elements of container data structures An API for construction of free-form strategies of access and manipulation of elements of arbitrary data structures. It allows to implement efficient composite patterns, e.g., a simultaneous update and lookup of an element, and even more complex things. Strategies are meant to be interpreted by the host data structure libraries. Thus they allow to implement all access and modification patterns of a data structure with just a single function, which interprets strategies. This library provides pure and monadic interfaces, so it supports both immutable and mutable data structures.
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GenValidity support for time Please see README.md
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GenValidity support for UUID GenValidity support for UUID
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The GHC API, decoupled from GHC versions A package equivalent to the ghc package, but which can be loaded on many compiler versions.