Shen - Programming language

home edit

Shen is a programming language created in 2011 by Mark Tarver.

#464on PLDB

13Years Old

50Repos

Download source code:

git clone https://github.com/Shen-Language/shen-sources

Homepage · Source Code · Mailing List

Shen language kernel sources for porters

Tags: programming language
Shen is developed on GitHub and has 348 stars
There are at least 50 Shen repos on GitHub
Early development of Shen happened in https://github.com/Shen-Language
Shen is written in Markdown, SVG, Make
The Google BigQuery Public Dataset GitHub snapshot shows 14 users using Shen in 16 repos on GitHub
Explore Shen snippets on Rosetta Code
Pygments supports syntax highlighting for Shen
GitHub supports syntax highlighting for Shen
shenlanguage.org was registered in 2011

Example from hello-world:

(pr "Hello World")

Example from the Hello World Collection:

\\ Hello world in Shen

(0-) (pr "hello world")

Example from Linguist:

(load "grammar.shen")

\*

JSON Lexer

1. Read a stream of characters
2. Whitespace characters not in strings should be discarded.
3. Whitespace characters in strings should be preserved
4. Strings can contain escaped double quotes. e.g. "\""

*\

(define whitespacep
  \* e.g. ASCII 32 == #\Space. *\
  \* All the others are whitespace characters from an ASCII table. *\
  Char -> (member Char ["c#9;" "c#10;" "c#11;" "c#12;" "c#13;" "c#32;"]))

(define replace-whitespace
  "" -> ""
  (@s Whitespace Suffix) -> (@s "" (replace-whitespace Suffix)) where (whitespacep Whitespace)
  (@s Prefix Suffix) -> (@s Prefix (replace-whitespace Suffix)))

(define fetch-until-unescaped-doublequote
  [] -> []
  ["\" "c#34;" | Chars] -> ["\" "c#34;" | (fetch-until-unescaped-doublequote Chars)]
  ["c#34;" | Chars] -> []
  [Char | Chars] -> [Char | (fetch-until-unescaped-doublequote Chars)])

\* (define strip-whitespace-chars *\
\*   [] -> [] *\
\*   ["c#34;" | Chars] -> ["c#34;" | ( *\
\*   [WhitespaceChar | Chars] -> (strip-whitespace-chars Chars) where (whitespace? WhitespaceChar) *\
\*   [Char | Chars] -> [Char | (strip-whitespace-chars Chars)]) *\

(define tokenise
  JSONString ->
  (let CharList (explode JSONString)
       CharList))

Language features

Feature	Supported	Example	Token
Comments	✓
MultiLine Comments	✓
Line Comments	✓
Integers	✓
Floats	✓
Strings	✓	"Hello world"	"
Print() Debugging	✓		pr