Nim is a statically typed compiled systems programming language. Matlab, python, and r dont have the metaprogramming tools for code generation. In this paper, we show how the rich syntax and static types of scala synergize with macros, through a number of real case studies using our macros some of which are production systems such as. I was really interested in the idea of static typing and compile time checking for validating program correctness.
A survey of metaprogramming languages acm computing. Camlp4 is an older way of modifying ocaml syntax and applying metaprogramming. Ocaml is essentially a functional programming language. Are you trying to avoid linking against cygwin at runtime or trying to avoid. Making increased compile time and size of resulting binaries is not looking light and slim. Sep 16, 20, code layout of fan a metaprogramming tool for ocaml hong bo zhang. Visitors unchained proceedings of the acm on programming.
Such an operation is normally illegal in ocaml because ocaml is strongly typed at compile time and downcasting is unsafe. Pdf functional extensions to the boost metaprogram library. In tokyo mew mew, deep blue escapes focus a biting mew ichigo that her social aoyamakun download with the dublin brigade espionage and assassination with michael collins intelligence well more. If we can do functional programming with python, do we. A survey of metaprogramming languages acm digital library. Nim generates native dependencyfree executables, not dependent on a virtual machine, which are small and allow easy redistribution. Ocaml is an open source project managed and principally maintained by inria. Scalas type system allows us to enforce compiletime constraints on our programs, and to take advantage of these constraints to help reason about our code. The ocaml standard library was clearly accreted over long periods, with no strong designer making hard choices about naming and such. It is generally discouraged nowadays use ppx instead. Ocaml extends the core caml language with objectoriented constructs.
Forces you to learn pure functional programming is the primary reason people pick haskell over the competition. Fan is a compiletime metaprogramming system for ocaml, originally inspired from camlp4. There were a bunch of functional programming languages that run on top of jvm. Sylvan clebsch introduces pony, a language built on the actor model which combines new approaches to garbage collection and concepts like capabilities to write high performance, concurrent code. Fan fan is a compiletime metaprogramming system for ocaml, originally inspired from camlp4.
Even i was looking for learning something new some time back. Using ocamlfind with ocamlbuild integrated since ocaml 3. To the point that some of the language features make you gawk and say ok, but why anyone would ever need to do that some examples include converting compiletime errors to runtime errors and writing your own exception handling system. Contribute to bobzhangfan development by creating an account on github. Fan is a compiletime metaprogramming system for ocaml, originally inspired from.
However, many smaller firms and even some giants have recognized the power of fp and are revolutionizing. The widget might or might not actually be a toggle button. Ocaml is a highlevel language that serves well to introduce functional programming. This looks like why firefox is a pig musings from the. The language has been on my radar for some years now. No offence to fp but the mainstream industries seem to have abandoned fp languages. While the concept of metaprogramming has existed for several decades, activities focusing on metaprogramming have been increasing rapidly over the past few years, with most languages offering some metaprogramming support and the amount of metacode being developed growing exponentially.
Given the complexity of template metaprogramming, developers need supporting libraries. Steven schveighoffer 4141 mar 27 there have been a lot of this pattern happening 12345swordy 49 mar 27 didnt the 1. I have read that ocaml is one of the better languages to write a compiler in, but i have no previous experience with it. As ive been hacking away with smerl last night, i had the following realization.
With its noprerequisites approach, ocaml from the very beginning offers a first step onto the functional road that will be useful no matter what technology you ultimately decide to invest in. What are the most promisinginteresting new programming. The nim compiler and the generated executables support all. I tried to build a game engine using haskell, read some books about type theory and found that its absolutely amazing. C, python, go, and the generalized greenspun law posted on 20171218 by esr in recent discussion on this blog of the gcc repository transition and reposurgeon, i observed if id been restricted to c, forget it reposurgeon wouldnt have happened at all. For more information about this release, see the 4. My anno processor will read that class at compiletime and build. Download an ocaml release or the development version and follow the instructions included therein. If you intend to try the code in this tutorial in the interactive toplevel, you must first issue. Sylvan clebsch on the actormodel language pony, garbage. Im not a big fan of how mixin is used in d to splice sourcetext into a generated function.
Yet we still frequently encounter situations where extracting a value from a map is not guaranteed to succeed, or mapping across a set of cases. Functional extensions to the boost metaprogram library. Lets say you have been reading the code a line at a time, and you are now reading lines nested within various ifwhilefor statements, you are at nesting depth. Is it possible to do compiletime execution in ocaml. In this presentation, attendees will learn how useful alias templates are both for syntactic cleanup and to implement advanced template metaprogramming techniques, and well see that there really is not a lot of difference among techniques for the manipulation of collections of types, values, and templates at compile time. Created by guido van rossum and first released in 1991, python has a design philosophy that emphasizes code readability, and a syntax that allows programmers to express concepts in fewer lines of code,2627 notably using significant whitespace. Compiletime metaprogramming for ocaml fan 2,047 commits 17 branches. Being a fan of type theory and functional programming, i. The ocaml compiler and libraries can be installed in several ways. Python is an interpreted highlevel programming language for generalpurpose programming. Is there anything different that these specific functional programming languages provide. Traversing and transforming abstract syntax trees that involve name binding is notoriously difficult to do in a correct, concise, modular, customizable manner. Using generators and lambda, we can do functional programming with python. I came across an article yesterday about programming languages, which hit on one of my major peeves, so i cant resist responding.
The reference d compiler is now open source hacker news. C, python, go, and the generalized greenspun law armed. Fan hongbo and zdancewic 20 is a metaprogramming system for ocaml that. I caught up with the venerable erik meijer recently to discuss functional programming languages, academic versus realworld application of functional. It combines successful concepts from mature languages like python, ada and modula. This corresponds to the safestring compiletime option, which was.
We address this problem in the setting of ocaml, a functional programming language equipped with powerful objectoriented features. Aug 16, 2015, justintime summoning of unikernels v0. Haskell, elixir, and clojure are probably your best bets out of the 27 options considered. Java 6 added compiletime generative metaprogramming through annotation. Aug 30, 2019, ocamlpros compiler team work update ocamlpro. When reading code, starting at the first line of a functionmethod, the probability of the next statement read being a forloop is around 1. In a functional language, not many control structures are needed. Im no particular fan of white space scoping, but i also dont mind it. The only control structure thats really necessary is a conditional expression and even thats not necessary in a lazy language 1 but ocaml, as an impure functional language, also provides control structures for iteration, and pattern matching combines a multiarmed conditional. This is a major release that introduces typebased disambiguation of constructors and record field labels, a whole lot of new warnings, and many other features described in detail at the end of this mail. However, it has a garbage collector, and is not entirely memory. There is an online repl that user can play with ifan. Compile time reflection or metaprogramming for ocaml aryxocamltarzan.
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