What's new?

Version 2.0

• The parser has been completely rewritten:

  • FSharp and FParsec dependencies removed
  • Huge speed-up
  • Improved error reporting
  • The entire compiler is now a single assembly of 270 kb.

• The for loop that works as both for and foreach loops:

    for a in 1..10 do
        print "a"
  

• The pure modifier enables automatic memoization for a function

• Unitialized variables: var x : int

• Multiline object initializers

    var x = new [
        "hello there"
        fmt "{0}, {1} and {2}" 1 true 2.5
    ]
  

• Various syntax improvements:

  • Function definitions became more clear with arguments in parens:

      fun add:int (x:int y:int) -> x + y
    

  • No braces around the single argument of a lambda:

      getPoints ()
          |> Where (p:Point -> p.X < 10)
          |> Select (p:Point -> fmt "{0}:{1}" p.X p.Y)
    

  • No braces for if, while and catch:

      try
          if a > 10 then
              fail "error"
          else
              while a < 10 do
                  println "a = {0}" a
                  a = a + 1
      catch e:Exception
          print "fail: {0}" e.Message
    

Version 1.1

• Constant expressions are evaluated at compile time
• Several bugfixes

Version 1.0

Initial LENS compiler version.