package minicaml

0.4 2020-01-16

• Multiline REPL

• New dictionary syntax

• Static purity inference algorithm

• map, foldl and foldr are implemented in the language

• Integer division now returns a float if the modulo between the two numbers is 0

• Print the type in the REPL result

• Directives on the toplevel: #include filename and #import to load and run files, #verbose n to set a verbosity level, #pure, #impure and #uncertain to set the global purity context.

• Minicaml and OCaml Stack traces on errors!

• Removed the let rec and let rec lazy statements.

• lazy-ness is now meant for each single assignment in a let statement, and they can be mixed; This is now valid: let a = ... and lazy b = ... ;;

• A LOT of internal optimizations.

• Lambda and Closure abstractions for function now have a single parameter and can be nested. This means that (fun x y z -> ...) = (fun x -> (fun y -> (fun z -> ...))) is now true, and the evaluation gets quite simplified (for example, in partial evaluation)

• Composition and reverse composition are back and working with <=< and >=>

• Purity inference is now done before evaluation

• Capability of recursion is now inferred automatically basing on the location of a fun expression.

0.3.3 2020-01-08

• Rely on the Ramda.js library for JS transpilation. (Currently broken because of numerical primitives and a lack of a Complex number solution for Javascript).

• Full numerical tower comprising Integer (Natural) numbers, Floating Point (Real) numbers and Complex numbers, with dynamic number-type infering arithmetical primitives.

• Switch between pure and impure primitives.

• Simple I/O primitives for printing.

• More examples and features descriptions in the README file.

0.3.2 2019-01-03

Added

• Reworking of language internals.

• Fixed build process

• More primitives and operators.

• AST optimizations based on propositional calculus laws.

• Experimental Javascript transpiler! :)

0.3.1 2019-12-26

Added

• map2 primitive

• Reading programs from files

• An abstraction that allows treating primitives as functions, and so allows currying and all the fancy stuff.

• Examples in the examples/ directory

• Greater or equal to and Less than or equal to operators

• More test coverage.

Bugfixes

• Fixed various bugs of 0.3

0.3 2019-12-25

Added

• A simple AST optimizer

• Multiple let assignments (let x = 2 and y = 3 and z = ... in ...)

• Function currying (partial application)

• Strings

• Sequences of expressions separated with ; are treated as a single expression that returns the value of the last one.

• Function pipelining (reverse composition) with the >=> operator. ((fun x y -> x + y >=> g) 1 2 is g 3)

• Dictionaries ({"hello": 123, "world": 345})

• Map, foldl and filter on lists and dictionaries

• Testing and code coverage using alcotest and bisect_ppx

Bugfixes

• Fixed function application parser

0.2.2 2019-12-13

Added

• let lazy rec (or let rec lazy) to define recursive lazy functions

• Command line option parser and man page

• Command line option -v (--verbose) to tell the REPL to show the AST and reduction steps.

• Evaluation step printing is now done in correct order and nesting.

Bugfixes

• Fixed boolean primitives.

Removed

• lazyfun and lazylambda statements.

0.2.1 2019-12-12

Added

• Optional lazy evaluation! You can use let lazy to define values that will be evaluated only when encountered in the let lazy expression body.

• Lazy anonymous functions! Just like the let lazy statement you can now use lazyfun or lazylambda to define anonymous functions which arguments will be lazily evaluated.

Bugfixes

• Fixed precedence levels in parser

Roadmap

• Cache for lazy evaluation

• Partial application

0.2 2019-12-08

Added

• Lists

• Unit

0.1 2019-12-03

Added

• Initial release of the project