lol-calculus: Calculus for LOL (λω language).

WARNING: this is a research program written as I learn and explore lambda calculii: please understand well by yourself whatever you may take from it; any question or contribution being welcome :-)

This package implements an explicitely typed (aka. à la Church) lambda calculus with: simples types, parametric polymorphism, higher-rank polymorphism and constructors of types (I have no need for dependent types so far, but it should be straightforward to add them to allow the full Calculus of constructions (CoC)).

This is mainly done by means of: a common Algebraic Data Type (ADT) for terms and types to build a Pure Type System (PTS), generalized DeBruijn indices to implement capture-avoiding substitution of variables, and Typeable axioms to embed Haskell types and terms (the most experimental and tricky part).

The inspiring programs I studied which explore similar problems: Simon Peyton Jones and Erik Meijer's Henk, Dan Doel's pts, Gabriel Gonzalez's morte, Richard Eisenberg's glambda, Edward Kmett's bound.

See also: the lol-typing package studying the type inferencing.

NOTE: if you are just interested in building an Embedded Domain Specific Language (EDSL) you may as well study Oleg Kiselyov, Jacques Carette and Chung-chieh Shan's Typed Tagless Final Interpreters, which you may find being a much more simple, efficient and robust approach.

Modules

Flags

Manual Flags

Name	Description	Default
dev	Turn on development settings.	Disabled
dump	Dump some intermediate files.	Disabled
prof	Turn on profiling settings.	Disabled
threaded	Enable threads.	Disabled

Automatic Flags

Name	Description	Default
exe	Build executable.	Enabled
lib	Build library.	Enabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

Downloads

• lol-calculus-1.20160822.tar.gz [browse] (Cabal source package)
• Package description (as included in the package)

Maintainer's Corner

Package maintainers

• julm

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Candidates

• 1.20160822