Top 1,000 Features Creators Events Podcasts Extensions Blog Explorer CSV Download


< >

ML, aka Meta Language, is a programming language created in 1973 by Robin Milner.

#183on PLDB 51Years Old

ML ('Meta Language') is a general-purpose functional programming language. It has roots in Lisp, and has been characterized as "Lisp with types". It is known for its use of the polymorphic Hindley–Milner type system, which automatically assigns the types of most expressions without requiring explicit type annotations, and ensures type safety – there is a formal proof that a well-typed ML program does not cause runtime type errors. Read more on Wikipedia...

Example from Wikipedia:
structure Rational : ARITH = struct datatype t = Rat of int * int; val zero = Rat(0,1); fun succ(Rat(a,b)) = Rat( a+b , b ); fun sum (Rat(a,b), Rat(c,d)) = Rat(a*d+ c*b , b*d) : t ; end

Language features

Feature Supported Token Example
Assignment :=
Type Inference
Garbage Collection
Line Comments X

View source

- Build the next great programming language · About · Resources · Acknowledgements · Part of the World Wide Scroll