(Sorry, this project is deprecated. I'm started my own research project instead it. Currently closed source, but I'll open it near future.)

• Nesp is a Lisp-like lightweight functional language on .NET
• Nesp is:
  • Very lightweight language syntax likely Lisp's S-expression.
    • A different topic is Nesp don't have "quote" expression.
    • Nesp expressions are lazy evaluation except literals.
  • Applicable .NET library.
  • Expandable tokens.
  • Designed for easy embedding and useful on REPL.

• Still under construction...

• We can use C# like reserved type names (ex: int, short, string, double ...)
• Additional reserved type names (guid, datetime, timespan, type, math, enum)

• Numerical operators (+, -, *, /, %)
• TOOO: Declare function (define)

• TOOO: Folder/file manipulations (ls, cd, mkdir)
• Clear screen (cls)
• REPL help (help)
• REPL exit (exit)

• Basic tips:
  • Nesp REPL mode not required brackets (...).

> 123
123 : byte

> 12345
12345 : short

> 1234567890
1234567890 : int

> 1234567890123456
1234567890123456 : long

> 123.456
123.456 : float

> 123.45678901234567
123.45678901234567 : double

> "abcdef"
"abcdef" : string

> datetime.Now
7/21/2017 12:04:43 AM : datetime

> guid.NewGuid
bb11b743-f5fe-4d68-bbe3-22e05606b3a5 : guid

> int.Parse "12345"
12345 : int

> System.String.Format "ABC{0}DEF{1}GHI" 123 456.789
"ABC123DEF456.789GHI" : string

• If argument is nested invoking function and it has no arguments, you aren't required brackets.
  • This sample invokes Guid.NewGuid(), but NewGuid has no arguments:

> string.Format "___{0}___" System.Guid.NewGuid
"___7ded117e-c873-48cf-a00b-75c57b8aa317___" : string

TODO:

> define fooValue (+ 123 456)
fooValue : int
> fooValue
579 : int

TODO:

> define intParseAndAdd (str value) (+ (int.Parse str) value)
intParse : string -> int -> int
> intParse "12345"
12345 : int

• Copyright (c) 2017 Kouji Matsui
• Under Apache v2 http://www.apache.org/licenses/LICENSE-2.0

• 0.5.1 Public open.